Interview Questions.

Question 1. Can Wind Turbines Make People Sick?

Answer :

In 2011, the Ontario College of Family Physicians, the Registered Nurses Association of Ontario, the Asthma Society of Canada and the Ontario Lung Association sponsored an marketing campaign that voiced this message: “Ontario docs, nurses and different fitness specialists support energy conservation blended with wind and solar energy, to assist us move away from coal.”

Over 30 years of studies by using protagonists and antagonists alike have failed to show clinical proof that wind mills are truely capable of make human beings ill. Over one hundred,000 turbines are presently in operation throughout the sector proper now, in general in Europe, many within a short walk of the proprietors’ homes.

Conversely, it's far a properly proven fact that burning coal reasons the premature dying of hundreds of Ontario residents, and debilitates those with asthma and other respiratory illnesses. Similarly, there are multitudes of news which conclusively display the dangers of nuclear power, including a list of over 800 “incidents” which include Fukushima, Chernobyl, Three Mile Island, and plenty of much less widely known, which includes incidents at Elliot Lake and Pickering in Ontario. A developing body of neighborhood and worldwide research has repeated established that wind electricity poses no significant fitness risk to human beings, and certainly wind plays an vital function in supporting us circulate faraway from extra risky alternatives like coal and nuclear.

Question 2. What Is “wind Turbine Syndrome”?

Answer :

“Wind Turbine Syndrome”, or “Wind Sickness” has been said by using a few citizens who stay near wind strength projects in Ontario but who do no longer personal stocks inside the tasks, and may consist of symptoms including lack of sleep, headaches, nausea, dizziness, anxiety, and in addition signs resulting from sleep loss (eg: decreased reminiscence, problem concentrating, faded spatial memory or capacity to assume critically and hassle clear up).

These and other signs may also multiply while 1/3 parties propose of their opportunity (ie: the ‘nocebo’ effect), are standard of stress and anxiety related disorders which can be caused by any wide variety of unwanted experiences, and are commonplace among folks that feel that they have been disrespected or mistreated.

The reality is that there's no such element as “Wind Turbine Syndrome”, however there are numerous strain and anxiety issues. Wind mills do no longer make humans ill, but badly managed initiatives and anti-wind activists can motive pressure to the neighbours. Residents must be cautious of setting an excessive amount of self belief within the accusations raised by means of anti-wind activists, and developers need to be expected to respect nearby citizens and deal with their concerns at some stage in the direction of a mission. This is why the Ontario authorities has positioned necessities on wind strength initiatives that they have got a sure wide variety of public conferences whereat they present data and collect public remarks previous to intending with construction.

Interestingly, those who personal their own turbines or who own stocks in a shared network project have never complained about stress or tension related signs and symptoms including those.

Power Electronics Interview Questions
Question three. Are Wind Turbines A Threat To Birds Or Bats?

Answer :

Properly hooked up wind generators are not a threat to birds, bats, or different avian existence. For every 10,000 birds killed through human activities annually, less than 1 is as a result of a wind turbine. By contrast, nearly 1,000 are because of residence cats, nearly 1,000 are due to vehicles, and nearly 6,000 are caused by collisions with windows on homes. That means that the living room window on your home is sort of 6,000 instances extra dangerous to a hen than a properly installed wind turbine.

To be honest, it's far proper that a poorly hooked up wind turbine can kill birds. That is why the Ministry of the Environment has strict hints approximately requiring chook migration and habitat studies, and why the wind enterprise in Canada has evolved quality practices over the past 30 years to decrease the probability that this can arise. The reports that are maximum normally quoted as evidence that wind turbines kill birds are commonly achieved in reference to US based totally tasks like Altamont Pass where mills have been installed in methods which are not approved in Canada, and we've got now not experienced the identical trouble here. The Wolfe Island assignment close to Kingston has had an unlucky history that has led to coverage modifications in Ontario to make sure similar errors aren't repeated, and our rules maintain to enhance to higher shield avian existence. Every new venture is more secure than the final.

By comparison, birds are very prone to habitat alteration resulting from weather exchange, which influences complete flocks and species and poses a miles greater danger than wind mills. The 2004 study in Nature expected that up to a quarter of all bird species ought to end up extinct by means of 2054 due to worldwide climate exchange. Wind mills, when well established in methods that comply with each the regulation and the industry’s high-quality revel in, are part of the answer to weather exchange, and are an oblique help to chook and natural world protection.

Question four. How Does Climate Change Affect Me?

Answer :

Climate alternate is already causing extra severe climate styles in most climate zones around the globe, and is turning into an increasing number of intense with each passing season. Future expected impacts of weather change are often better described as “international wierding”: warm areas gets warmer, a few regions will get barely less warm, moist areas gets wetter, dry areas gets dryer, … and everywhere will see an boom within the severity and frequency of herbal disasters. Climate refugees are already the largest percentage of refugees within the world. Future climate related screw ups will encompass heat waves, floods, wooded area fires and hurricanes, and converting coastlines. The loss of human life is an inevitable and very annoying truth. In the face of the prediction that maximum of the arena’s coastal towns can be submerged in a hundred yr’s time, all of the concerns raised thus far approximately wind turbines pale through contrast. Wind power is one of many varieties of renewable power, all of which can be urgently wished if we are to do our element in the race towards climate trade.

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Question 5. Why Is Coal A Problem?

Answer :

Ontario’s government has, for decades now, subsidized the use of coal and nuclear based totally energy. The damage due to coal by myself fees our fitness device a said $3 billion annually in Ontario. Burning coal killed 316 people last 12 months in Ontario, consistent with The Ontario Clean Air Alliance, which additionally estimates that 440 people were admitted to clinic, 522 humans sought assist within the emergency ward, and 158,000 people were sickened with such ailments as bronchial asthma assaults. According to Ontario’s Chief Medical Officer of Health, 9,000 human beings die upfront each 12 months in Ontario from smog, to which coal is a giant contributor.

However, the Ontario authorities has identified the want to reduce dependency on coal energy generation and has closed several coal flora already, partially because of the Green Energy and Green Economy Act.

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Question 6. I Thought Nuclear Was Safe? Why Should I Be Concerned About Health Issues From Nuclear Or Coal Plants That Are Far From My Home?

Answer :

To be cliché, nuclear’s back backyard is lots larger than that of wind strength. Radiation from the Fukushima meltdowns has been reported all over the globe, and is inflicting crop and animal illnesses at the US west coast. Chernobyl has caused over 200,000 deaths, and many millions of illnesses (cancers and in any other case), maximum from radiation associated illnesses in human beings that did not live close to the twist of fate website online (ie: many in Ukraine and Belarus, however additionally as a long way away as Germany, France, and even the UK). While a small institution of people complain that noisy windmills are disrupting their sleep and giving them complications (be aware that these lawsuits never come from people who truely very own turbines), those dwelling adjoining to the equal water our bodies as nuclear flora (even as much as numerous hundred kilometers away) hazard infertility, multiple styles of most cancers, and radiation sickness, and people within even some hundred kilometers of a fuel or coal generator chance affected by poisoned water, lung disease, and asthma. The tragic reality is that loads of people die each yr in Ontario due to the coal and nuclear additives of our electricity device. Wind energy is not killing human beings. Replacing coal and nuclear with a mix of other resources, inclusive of wind strength, can really save lives.

Question 7. Why Are Electricity Prices Rising?

Answer :

If the energy grid have been a vehicle, then we may want to describe it this manner: all through the 50’s, 60’s and 70’s, we were paying the rent on our modern day vehicle. It labored nicely, wished little upkeep, and became visible as an affordable expense. After we paid the rent off, we still had a distinctly new vehicle that changed into very less expensive to personal, and required little renovation. But, like several vehicles, it in the end either needs upkeep or will need to be replaced, and we’ll end up paying to restoration it or to replace it. In Ontario we’ve dispose of nicely preserving this “automobile”, and our electric machine is now going to be very highly-priced to repair. The maximum recent Liberal government started out those fixes (that’s a part of why software quotes have extended in latest years), however previous governments of all stripes (Conservative and Liberal) had their proportion in neglecting the grid till it got here to the tremendously poor condition it’s in now. No rely what we construct or repair over the subsequent decades, we will have new grid infrastructure worked into our electricity prices, and we can both pay for it on our application invoice as $/kWh, or it is going to be backed by the government, and we’ll emerge as buying it by some means thru taxes.

It is rumored that the Green Energy Act is answerable for rising strength bills. This is sincerely now not real. The common Ontarian pays $zero.Thirteen/kWh for his or her strength, and most of the recent will increase are due to upgrades for our getting old transmission device, the biggest part of that is earmarked to help the privately controlled Bruce Nuclear Plant (ie: our public tax bucks are paying to assist this private organization make extra cash off of us all). In reality, the Ontario Energy Board currently pronounced that simplest 6% of the increase in Ontario’s average charge of strength is due to renewables: 45% is from nuclear, and the the rest is unfold across fuel/coal/massive hydro and system improvements. Of the $0.13/kWh paid by means of the common patron, $0.002 become enough to cowl all the renewable energy presently related to our grid machine: simplest 1.Five% of the bill! That includes wind, solar, and everything else, at simplest 1.5% of our strength invoice. Wind and solar aren't causing our power charges to upward push: nuclear rebuilds and transmission enhancements are.

Renewable Energy Tutorial Thermal Power Plant Interview Questions
Question 8. Why Do We Sometimes Pay The Us To Use Our Electricity?

Answer :

Ontario’s power gadget works like a massive black field: energy is purchased from many different sellers (mills), is funneled through the black container, and is then sold to many distinct shoppers (consumers). The black container inside the middle is in part referred to as the Ontario Power Authority (OPA), and is partially the Independent Electricity System Operator (IESO). The OPA has particular buy agreements with each of the many generators, from nuclear plants to Niagara Falls to houses with sun panels on them. Many of those agreements are very distinctive from each other, and feature little to do with the price that we simply pay for energy: these purchases are all blended collectively into the OPA’s finances, and the OPA will pay for them quite one after the other from the manner they promote the strength to the rest of Ontario. Similarly, the OPA has agreements with every purchaser: large businesses like cement flowers may additionally connect to the grid immediately and pay underneath positive rules, even as Local municipal software Distribution Companies (LDC’s) connect to the grid and pay beneath one of a kind policies, and then the LDC’s resell their electricity inside their municipality to local clients like small groups and home owners. The OPA/IESO have a hard job: in the center of all this confusion, their process is to make certain that there is continually the proper amount of power to hold the lighting fixtures on and the factories running: neither an excessive amount of power, nor too little. When all of us get domestic from paintings and switch on our stoves to prepare dinner supper, the OPA/IESO purchase more energy to ensure our stoves will paintings. When we all visit mattress and flip the whole lot off for the night, the OPA/IESO buy less.

The hassle with this gadget is that a number of the corporations that promote electricity to the OPA can’t clearly turn off, or flip down the amount that they sell. Nuclear companies are the largest example of this, due to the fact you could’t just turn off a nuclear reactor for the night time (it takes several months to cool down after which ramp up again adequately, and wishes substantial preservation in among), and as soon as it’s on, it doesn’t have an option to be grew to become up or down: it’s sincerely on or off. Ontario as a province is the usage of less power than we did in 2006, so we now regularly have nights in which our nuclear vegetation are generating enough strength that even after we've got became off the whole lot else, there’s still a lot electricity being pumped into the grid that the nuclear flora are generating greater than we need, and we ought to remove the extra, or else that extra power will literally soften and burn things. In moments like these, while our supply exceeds our call for, the OPA pays different jurisdictions just like the US to consume our energy.

Some Ontarians blame this extra supply on wind energy, but the numbers show that wind electricity doesn’t have a tendency to supply very plenty during the night time: wind peaks when the temperature is changing (ie: sunrise and sunset, in which adjustments in mild create changes in air strain which creates wind), so wind electricity tends to be to be had whilst we want it maximum: within the morning top before work and the night top at some stage in supper and laundry time. The instances that we pay other jurisdictions to use our power are usually in the nighttime while we are able to’t turn down our nuclear plants. And regrettably those instances show up a whole lot more often than we would love.

To resolve this trouble, we might want to decommission certainly one of our nuclear vegetation (one could be enough, but not anything else, no longer even all of Ontario’s wind deliver, would suffice), and update it with extra flexible power that we will flip down at night. Refer to questions (Q28), (Q29), (Q30) and (Q39) under for extra records on ways that we may want to use much less nuclear and a bigger blend of renewables and flexible (dispatchable) deliver assets instead.

Question nine. What Is A “feed-in Tariff” (suit)?

Answer :

A Feed-in Tariff (FIT) is a coverage mechanism (an device of regulation) designed to encourage the adoption of renewable energy assets and to help boost up the flow towards grid parity (whilst renewable strength resources can have the identical charges as conventional sources of power including herbal gasoline, coal, or nuclear).

FITs commonly includes three key provisions: 

assured grid access;
long-term contracts for the power produced;
purchase fees which might be methodologically primarily based on the price of renewable energy era and tend towards grid parity. 
FITs are designed to assist standardize the manner electricity is purchased from generators earlier than being disbursed to consumers. Traditional energy markets have some of creative subsidies and sales offsets that enable market operators (just like the Independent Electrical System Operator in Ontario) to promote electricity to clients at artificially low quotes, like the fees we've in Ontario. Renewable electricity structures hardly ever have get right of entry to to those subsidies, so that they promote at proper costs, instead of artificial costs, and the market is biased toward traditional strength sources (like coal, natural gas, and nuclear) which could otherwise be lots greater highly-priced. FITs are designed to level the playing area, and to present renewable strength assets like wind, solar, hydro and biomass/biogas, the opportunity to promote competitively. If resources like coal, herbal gasoline, and nuclear were purchased through a FIT instead of being subsidized, they could in all likelihood have tariff rates among $zero.15 and $zero.45/kWh, not the $zero.0.5 to $zero.0.5/kWh that Ontarians expect.

Power Transmission Interview Questions
Question 10. Aren’t Fits Just Another Form Of Subsidy?

Answer :

No. FITs do now not subsidize the acquisition or installation of the system used to produce renewably generated strength, nor do FIT bills come from taxpayers. Subsidies are innovative price schemes used to offset or reduce the true of energy, and are typically funded via tax payers in place of with the aid of strength clients (eg: certain company tax credits/exemptions and studies tax credit for herbal gas fracking), similar to the manner we pay for construction of coal/nuclear/fuel plants, or the disposal of nuclear waste, one at a time from buying the electricity.

Feed-in-Tariffs are an all-in not anything-hidden charge for power as it's far delivered: it’s called a “tariff” because it doesn’t get paid till the power is used. Other forms of strength are heavily subsidized via many different collaborative investment mechanisms (a few estimates top $3.5 Trillion/year globally). Renewable energy this is bought through a FIT agreement has a totally disclosed rate that is paid best on shipping: if no energy is introduced, then they don’t get paid, and regardless, they get no subsidies.

Question 11. Can A Fit Contract Be Changed Over Time?

Answer :

No. A FIT contract is simply that – a agreement. It is legally binding and can't be modified with out the consent of all parties who signed the contract. If you join up for a PV settlement and positioned sun panels on your roof, you may get what the agreement says you'll get until the agreement expires in twenty years. The authorities can alternate what it gives to new applicants, but once a settlement is issued, it is strong and could not exchange.

Powerbuilder Interview Questions
Question 12. I Hear That European Countries Are Reducing The Rates They’re Paying For Renewable Energy. Is It True, And Does This Mean Renewable Energy Is Phasing Out?

Answer :

Yes and No. Several European nations have had Feed-In Tariff (FIT) packages in their personal for decades now, and people applications had been so successful that they have helped the local renewable strength enterprise to develop, and now renewable energy in those places is less high-priced to install than it once turned into. The cause of a FIT is to help in growing the quantity of renewable power deployed in order that the cost of set up drops down towards parity, wherein renewable power sources could be capable of compete frivolously with greater conventional technologies. Old contracts will no longer have their charges modified, but new contracts may be presented much less because the price of renewable strength structures goes down. Eventually whilst the price to supply renewable energy reaches parity, the FIT program will now not be necessary. Ontario’s FIT application was established with an automated 2 yr review length: it was launched in 2009 and planned from the beginning to see prices reduced on the close of 2011 and once more in 2013 and bi-yearly thereafter. Ontario has the advantage of not being first into this marketplace, and has been capable of accelerate our market development based at the instructions we were able to analyze from different jurisdictions around the world who've correctly carried out FIT systems of their own: it is very likely that Ontario pricing may be able to be reduced more quick than other jurisdictions had been capable of do.

Power Electronics Interview Questions
Question 13. How Does The Green Energy Act Create Local Jobs?

Answer :

Whatever power we use, a person will receives a commission. Most of our power is generated with the aid of certainly one of some big corporations, like Bruce Nuclear or Ontario Power Generation. Bruce Nuclear is a non-public firm, and the cash that Ontarians pay to them is going to their shareholders. Ontario frequently needs to import energy from our neighbor provinces and states, and in the ones instances Ontario tax greenbacks are paid to outdoor events, and the cash leaves Ontario.

Instead of paying for imported strength or paying corporate shareholders, the Green Energy and Green Economy Act allows us to pay normal Ontario citizens to produce easy energy for us, at the same time as creating lots of skilled, neighborhood jobs. The cash stays in Ontario, and after getting used to pay Ontario humans, it receives spent once more in Ontario to shop for groceries and different goods, and that equal money commonly receives spent and respent seven times earlier than it leaves the province (for buying imported items). This way that each $1 we spend buying energy from an Ontarian certainly creates $7 really worth of in-province change, and it stimulates the economy. Rather than giving the money away to big organizations or outdoor parties, we are able to spend it on ourselves, again and again once more. That means that we are able to have enough money to pay barely higher charges (up to 7 times higher) for the identical strength, if we pay it to Ontarians, and particularly if those Ontarians are promoting us electricity which they made with Ontario-made solar panels, or Ontario-made wind generators.

An envisioned 20,000 skilled, neighborhood jobs have already been created via the Green Energy and Green Economy Act. These jobs include Ontarians who are production such things as solar panels and wind generators, Ontarian contractors who're putting in them, Ontarian specialists and protection inspectors who are assisting the system, and Ontarian land proprietors who promote us the energy: all due to the fact every dollar we pay them for his or her strength recycles itself again and again again in our economic system, making greater exchange and making more jobs.

Question 14. I’ve Heard That Wind And Solar Jobs Kill More Jobs Than They Create (eg: Spain)?

Answer :

This hearsay changed into unfold from an illegitimate take a look at done in Spain, now not supported with the aid of the Spanish authorities, funded ultimately through oil cash, and has become referred to as the notorious “Spanish jobs have a look at”. The study covered several defective assumptions and weak information which it used to say that for the amount of cash invested with the aid of the Spanish authorities in wind and sun energy tasks, that a certain wide variety of jobs were created, and that a a couple of of different jobs had been displaced from other industries (eg: coal and nuclear jobs).

There turned into no information to support these claims though, and the Spanish authorities went on public file saying that the examine was unfounded and false. The Spanish marketplace has seen a sizable net increase in employment because of their renewable energy legal guidelines, and it is clearly unfaithful to say otherwise. The US government and numerous others have given that disproven the observe repeatedly, and reiterated that this look at is fake. Even nevertheless, this fake take a look at has been circulated broadly in anti-wind and anti-sun lobby corporations throughout North America, numerous of whom have acquired support investment from Exon and different similarly questionable sources. Similarly false claims abound approximately Italy, that's now one of the top 3 European countries in the renewable energy industries, and has loved regular net activity boom. Still similarly claims (equally false)

Question 15. How Much Are These New Green Jobs Costing?

Answer :

In Ontario, each dollar invested in sun strength creates 12 instances more jobs than nuclear and 15 times greater jobs than herbal gasoline or coal in step with unit of power produced, and at 1/4th to one/6th the price of jobs created by way of nuclear, natural gasoline, or coal. Solar is the maximum high-priced era among the ones supported by using the Green Energy Act, and the opposite technologies provide strong process advent information as nicely.

Some Ontario businesses have copied the infamous and fake “Spanish Jobs Study” (see Q14), and feature alleged that those green electricity jobs are costing Ontario as tons as $170k/yr/task. This is completely false and is wrongly overstated. The overall amount of money paid with the aid of the Ontario government for strength from all sources of renewable energy blended in 2010 was about $270 million, which helped create almost 20,000 jobs up to now. That works out to handiest $13.5k/process on average, which is a long way inexpensive than what we pay for nuclear or natural fuel jobs, or even compares properly with infrastructure jobs. Not simplest that, however these are true jobs: production, consulting, and contracting positions, and focused on a fraction of what the jobs make a contribution returned to the economic system: The profits tax accumulated from those new jobs almost can pay for the roles to be created, and from that factor of view, those jobs are costing the government very little indeed, among $6k/task and $0 ultimately.

Solar energy Interview Questions
Question sixteen. How Can We Afford $0.Eighty/kwh For Solar?

Answer :

$0.80/kWh may additionally appear costly, but it’s important to understand what else to examine it to. Consumers don’t pay this price: it gets blended in with the alternative purchases that the Ontario Power Authority (OPA) makes earlier than they rate us the net charges, and this $zero.80/kWh charge represents much less than zero.001% of the bill, and all future solar initiatives will price less because the prices maintains to decline (already right down to $0.549/kWh in 2012). Many Ontarians believe that we get nuclear strength for $zero.03 to $0.05/kWh, however this is not quite real. That may be what your nearby software expenses you for the energy, but that’s not what it simply costs. We additionally pay for the nuclear flora to be constructed, even when they may be owned by way of private corporations, and then we pay to shop for electricity from them, and we pay for the waste to be managed, and we pay for insurance (ever growing for the reason that Fukushima, when you consider that so many nations have declared that they are transitioning away from nuclear, and on the grounds that big organizations like Siemens and GE have stopped promoting reactors). Nuclear power costs us more like $zero.25 - $0.35/kWh proper now, but that fee is hidden and blended into the internet charge we pay, after numerous tax subsidies are implemented from other budgets, making it very hard to expose the real cost. The OPA pays exclusive costs for distinct purchases on a regular basis, and a lot of the ones charges are governed by the “spot market”, or the hourly supply & call for market in which the rate varies up and down relying on how plenty energy is available and on what number of customers need to devour it. Spot market costs are typically maximum within the afternoon and early evening when the solar is shining brightest, so sun should by no means be as compared with the most inexpensive strength we buy, but need to always be compared with the most highly-priced top prices that the OPA will pay as a substitute: as plenty as $2.00/kWh as mentioned by Ernst & Young (see references under).

Next it’s critical to recall the actual monetary impact of the charge paid for sun, due to the fact that we don’t pay the price directly (similar to we don’t pay by using the kWh to construct a nuclear plant or manage its waste: those costs are covered in other ways). The money spent buying solar strength receives paid to Ontario home owners, who spend the money on groceries and commodities, contributing to the nearby economy. The Ontario Sustainable Energy Association notes that these moneys tend to flow into not less than 7 instances within the nearby economy earlier than disappearing in tax levies or imports, so the cash gets reused 7 times earlier than disappearing, and the effective price to the economy is decreased to one/7th the price tag price. That means that $zero.802/kWh for neighborhood Ontario sun strength has a true effective value to the financial system of towards $0.One hundred fifteen/kWh, which is much less than the $0.Thirteen/kWh already paid through the average Ontario client. Remember that we don’t pay the price ticket price: the OPA blends all the distinctive price tag fees collectively, and we emerge as paying the effective rate after several different subsidies and financial elements have been taken into consideration. Properly taken into consideration, because of the nearby financial stimulus gain, solar is honestly less expensive for the OPA than enterprise as normal.

Question 17. Won’t Nuclear Always Be Cheaper Than Solar?

Answer :

No. Steven Chu, US Secretary of Energy (2011), and numerous reports from the International Panel on Climate Change (IPCC) have tested that if we were to start constructing new nuclear vegetation nowadays, then by the point we end them (generally ~10 years later), sun energy will already value much less consistent with kWh generated and offered:

sun can have reached grid parity, and may be competing dollar for dollar with nuclear and different electricity sources. That could be 2020 in America, or 2017 inside the EU, or 2015 in China. The Nuclear Energy Agency lately (June 2012) quoted a value of $5.86/W to construct new nuclear facilities inside the Czech republic: that’s the identical fee Ontarians could pay for solar PV, and is extra than double what we’d pay for brand spanking new wind strength, and more latest nuclear initiatives (Finland and the United Kingdom) are reporting vast increases in value because of new coverage charges and other technical precautions which have come to be preferred due to the fact that Fukushima.

Even nowadays, a comparison of building renewable power primarily based generators or new nuclear reactors found that renewables could be significantly less highly-priced than new nuclear: $0.One hundred thirty five/ kWh on average for renewables vs. $0.19 - $0.37/ kWh for brand spanking new nuclear. Every nuclear assignment in Ontario’s history has long gone over time table and over budget to an average of 250%, that's then paid via taxpayers. The nuclear enterprise also has hidden subsidies that aid radioactive waste disposal and coverage. A Queen’s University take a look at observed that insurance costs are at the least $33 million consistent with nuclear plant consistent with yr. Nuclear flowers can’t be built without heavy insurance, and specifically because Fukushima, those prices are most effective going up. Ontarians are nevertheless paying for past nuclear price overruns too, and those fees continue to burden destiny nuclear projects: We have collectively remodeled $19 billion in bills on the former Ontario Hydro’s “stranded debt” and still owe more than $14 billion greater. The enhancements on the Bruce Nuclear Station have already stressed taxpayers $237.Five million in overrun prices, while also requiring primary grid enhancements, which together are answerable for a sizable part of the recent energy rate increases throughout the province. Nuclear has never been reasonably-priced, and is handiest getting more steeply-priced. Solar and other renewables are constantly getting cheaper.

Solar Thermal Interview Questions
Question 18. Apples To Apples, How Much Wind/solar Would It Take To Replace Nuclear, And At What Cost?

Answer :

Ontario purchases energy from diverse extraordinary technologies in diverse specific approaches, and it'd be a lot easier for the public to understand if we were to compare all of them immediately. The biggest difference in how we pay for the numerous strength era technologies is whether we pay for them up front, over time, or each.

Nuclear power is purchased both up the front and through the years: we the public pay for the construction of recent nuclear strength flora up front via our taxes, and then we purchase the power over the years as we use it. The debt retirement price we nonetheless see on our electric payments is supporting to pay off the mortgage the Province used to assemble our remaining spherical of nuclear plants. The maximum current nuclear quote in Ontario become $26 billion to assemble a 2,400 MW plant (Darlington), which would generate approximately 18.9 TWh of strength in line with year, or enough for ~2,000,000 houses (assuming one hundred% output and 90% availability, that is more than we’ve ever skilled in Ontario, however that is what the nuclear enterprise believes new reactors might be capable of supply). The rate of nuclear electricity after construction is the continuing fee it takes to operate and insure the nuclear flowers: $zero.06/kWh of power offered to the grid for present flora, ~$0.16/kWh to ~$zero.35/kWh for brand spanking new flora but to be built, or even higher in keeping with some reports. There are different tax subsidies used to cover the control of nuclear waste, but that is separate, and isn't always genuinely reflected in the charge according to kWh.

If we had been to build wind generators to generate the same amount of energy as that nuclear venture, then it would require 8,six hundred MW of turbines (which usually supply at 28% of their rated ability internet over the yr, and at ninety seven+% availability: ~2,200 kWh/kW/12 months in Ontario), at a internet set up value of $17.2 billion at these days’s fees, without any of the majority savings that would be very likely for an order this large. Operations and renovation (O&M) costs are what pressure the ongoing charge of power, and wind strength has a tendency to cost four% of buy prices ongoing, or ~$zero.036/kWh in this situation. Compared to $0.06/kWh (for vintage nuclear, wherein new nuclear might value more), which means that wind energy could keep tax payers 34% of the initial set up fee, could shop customers at the least a further $nine.1 trillion over the 20 12 months life of the mills, and might similarly avoid the prices and liabilities of dealing with nuclear waste. This financial savings would greater than pay for enhancements and replacements to extend the lifestyles of the mills to match or exceed the life of the nuclear plant, compounding the savings into the perpetual destiny.

If we instead consider sun, then it would take ~sixteen,500 MW of sun PV panels, walking at a median of 15% performance and 98+% availability (producing a mean of one,a hundred and fifty kWh in step with kW set up per year in Ontario without any fancy monitoring/concentrating hardware), with a internet set up cost of $50-55 billion, and ongoing protection charges of ~$0.001/kWh for 35-40 years earlier than the panels need to get replaced.

Power Plant Project Interview Questions
Question 19. Does Revenue From Renewable Energy Stay Local?

Answer :

Yes, if the tasks are owned via local network contributors or nearby companies. Ontario has the best stage

of network ownership of renewable power in all of North America due to the Green Energy Act. That method that Ontario has more farmers and domestic owners who can generate their personal power and promote it to the grid, than everywhere else in North America. Whether it’s sun panels on a church, medical institution or community centre, or windmills on the farm, revenue earned from renewable energy remains in the community.

Question 20. Do Wind Turbines Affect Property Value?

Answer :

Talk on the road is very mixed in some groups, however real research have shown that wind generators have both no impact or a barely fine effect on assets values. One study analyzed property values in a fivemile radius of wind farms across america, such as rural New York, and found that assets values simply elevated faster near wind farms 87% of the time compared to different close by communities. Chatham-Kent and the Erie Shores municipalities in Ontario have experienced this same issue.

Anecdotal enjoy has shown that belongings values may lower temporarily at some point of the time among when a brand new wind farm has been announced and when the construction is entire, and that opportunist buyers can also provide insultingly low purchase fees to homeowners who specific frustration approximately a deliberate wind farm or highway or another sort of production (ie: in case you broadcast which you hate your location while trying to circulate, then unscrupulous shoppers may also attempt to take advantage of you with unfair purchase costs), but reviews are showing really that real estate values stay strong and keep growing after wind farms are constructed.

To answer this question well on your area, you’ll want to keep in mind what the various factors are that affect property values, and in the long run maximum of these have to do with the client: humans’s personal choices may additionally make them desire to avoid generators, or to relocate closer to them. Both agencies of humans exist in Ontario. Properties which gain rent from neighborhood turbines will straight away see an increase in their price. Other local residences may recognize much less speedy.

Wind Turbine Interview Questions
Question 21. How Loud Are Wind Turbines?

Answer :

Noise can be measured with special meters: the noise from a commercial sized wind turbine on the nearest noise receptor (together with a residence this is just outside the legally required setback distance from the turbine) could be no more than 38 dB. This volume is similar to a quiet library. Forty four dB is just like the sound of a hen chirping, 60 dB is the sound of a normal communication, and nearby traffic can range from 50-one hundred dB. Commercial scale wind mills are quiet: generally quieter than the wind.

Question 22. When Are Sound/noise Studies Required?

Answer :

The government of Ontario has set up numerous setback requirements for wind generators. If wind mills are large than 50kW rated, or are capable of be louder than 102dBA, or if there are greater than five mills within 3km of any specific noise receptor (eg: a residence), then the proposed generators may be required to undergo a noise observe which may additionally affect the setback necessities for the project, or they'll skip the noise have a look at by way of increasing the setback requirements. Otherwise, the standard setback requirement of 550m from any receptor (eg: a residence) applies to all receptors except the ones who've specifically granted permission for the turbine to be nearer (eg: if you personal your very own turbine then you can supply your self permission to install the turbine nearer than 550m to your property).

Question 23. What Is Low Frequency Noise (“infrasound”), And Is It A Concern?

Answer :

“Infrasound” is sound that has a frequency that is so low which you can not hear it audibly with your ear. It is occasionally mentioned really as “low frequency noise”, or incorrectly as “sub-sonic” noise, but the term “subsonic” more efficiently refers to hurry, no longer audible noise.

Infrasound is given off by way of motors moving along roads, by way of doors closing, by using status gadgets inclusive of bushes and buildings whilst wind blows beyond them, or by using many forms of animals (eg: whales calling via the ocean or elephants speaking throughout the plains), and by way of wind turbines. The stages of low frequency noise emitted by means of any of these (site visitors, timber, animals, wind mills) is measureable: wind turbines emit at a degree similar to that given off via timber at similar distances, so wind turbines are no greater risky than timber as an infrasound emitter. Most houses have timber and roads towards them than the minimum wind turbine setback of 550m, and the infrasound generated in these closer proximities is more potent than you'll ever enjoy from a wind turbine 550m away. Further nonetheless, infrasound is permitted for use in healing rubdown at tiers that exceed those produced with the aid of usual wind generators.

Concerns had been expressed inside the past approximately some older style business equipment (photograph big engines that rumble when they run) which used to make low-frequency noise. Employees operating with heavy equipment that always emits low-frequency noise may additionally (through the years) revel in undesirable health influences from the noise publicity, inclusive of hearing loss as an instance. Wind turbines are basically a generator that is pressured to turn by means of the wind, and turbines are essentially vehicles pressured to run backwards: older wind turbine generation (~30 years in the past) used older motor generation that during a few pick out instances changed into later discovered to emit low-frequency noise. These cases were notably rare, however have for the reason that been corrected regardless, and wind generators have no longer been recognised to emit any enormous tiers of low-frequency noise for over a decade now. The only infra-sound that you may likely ever be uncovered to to your lifetime is the same as that emitted

with the aid of bushes, visitors, animals, and doors last close to you. Many stereo amplifiers and surround-sound home theatre structures even emit low-frequency noise, and our kids name it “bass”.

Infrasound from wind generators isn't always a challenge. If it was, then roads, bushes and doors could be a health difficulty too.

Solar Water Pumps Interview Questions
Question 24. Do Wind Turbines Produce Electrical Noise?

Answer :

No. Wind Turbines are essentially huge business motors that run backwards (ie: the usage of wind to spin the rotor to generate energy rather than using energy to spin the motor to transport a device), and they may be very efficient. In order to be accepted to promote a wind turbine in Canada, turbine producers are required to have their system meet sure CSA requirements and be set up in a manner that complies with our electrical protection codes. Modern wind turbine era does not make noisy/volatile energy, and if it did, it would never get authorised by means of either the CSA or the Ontario Electrical Safety Authority.

Thermal Power Plant Interview Questions
Question 25. Do Wind Turbines Throw Ice?

Answer :

Under precisely the right conditions, it is viable for ice to shape on turbine blades. However, like airplane wings need to be ‘de-iced’ to carry out nicely, turbine blades come to be inefficient when their aerodynamic form is modified by way of a coating of ice, and they sluggish down and subsequently stop. Wind turbine era has developed appreciably during the last 30 years, and current designs encompass several strategies to save you ice buildup: some use heating factors within the blades, a few use sensors to locate buildup and close down the turbine, and others use blade materials that are in particular designed to not obtain water (ie: ice virtually can’t connect to the blade, so it can’t increase).

Question 26. What Is “stray Voltage”, And Is It A Concern?

Answer :

“Stray Voltage” is the result of a poorly stressed electric gadget, and is certainly one of many motives why we've electric codes (the Ontario Electrical Safety Code, Distribution System Code, and Transmission System Code). In Ontario, the regulation requires that any new venture installed and connected to the electric grid ought to first be established the usage of government approved equipment (eg: device licensed with the aid of the Canadian Standards Association), designed with the aid of license experts (eg: Professional Engineers), installed with the aid of certified tradesmen (eg: certified Electricians, Millwrights, etc), and inspected with the aid of certified inspectors (eg: the Electrical Safety Authority). Wind mills can't be connected to the grid without assembly all of those requirements. Stray voltage is brought about when an electrical tool including a motor, industrial control device, or wind turbine is attached to the grid improperly (more mainly, stray voltage occurs when electrical structures aren't grounded properly), and in a manner that violates the Electrical Safety Code and/or Distribution System Code.

To solution more succinctly, “stray voltage” is a difficulty, and we have legal guidelines in Ontario to prevent it. Wind generators do now not cause stray voltage: awful electric workmanship does, and Ontario law calls for that certified government inspectors ought to approve each wind turbine set up before it can be became on.

Solar Photovoltaic Interview Questions
Question 27. What Is “emf”, And Is It A Concern?

Answer :

EMF stands for “electro-magnetic subject” or “electromotive pressure” (which can be distinctive, but deeply related matters), and is largely the hidden magnetic radiation all round us that emits from the solar, from home electronics, from mobile smartphone towers, and from the alternator for your vehicle engine. EMF is one of the essential building blocks of nature, like gravity, and is what holds atoms together in all living things. All digital technology paintings because of clever makes use of of EMF.

The motive force and front seat passenger sitting about 1.5m from the common automobile alternator gets more than 12 times extra exposure to EMF (from the vehicle alternator) than a home owner would acquire from a 2MW wind turbine set returned 550m. At huge electricity stations, workers are often inside five-10 meters of electrical turbines which might be many masses of times more powerful than a 2 MW wind turbine at 550 meters from residential groups. The EMF emitted by using the turbine in downtown Toronto is smaller at only 10’ away than the EMF emitted by means of a family hair dryer. EMF is an crucial part of existence, and the EMF emitted from wind generators is nothing to be involved about.

Power Transmission Interview Questions
Question 28. If We Shut Down Conventional Power Plants In Favour Of Wind Plants, Will There Be Brown-outs When The Wind Doesn't Blow?

Answer :

No. Even if we have been to multiply five-fold the number of wind turbines set up in Ontario over the subsequent 3 years, wind energy might still supply much less than 20% of our electric grid. 20-30% is what several global groups keep in mind a really perfect contribution via wind power, and the rest of our grid could be a mixture of factors like hydro (Niagara Falls), biomass, mixed warmness and energy from natural fuel or biogas, and to a lesser degree, such things as sun. Some nations in Europe are running towards producing as plenty as 60% in their energy from wind. Swings in wind electricity manufacturing can easily be controlled just like the rest of the electrical gadget. The contemporary method for handling swings in production or call for in Ontario is based totally on dispatchable power resources like (1) coal, (2) hydro-electric flowers which hold reservoirs of water that can run through water mills at any time to supply electricity (we are able to flip them on/ off in milliseconds), and (three) natural gas “peaker” plant life which can pinnacle up electricity requirements upon call for. In much less than a 2nd, the province can already flip up the power we get from water, coal or gas to make up for lack of wind, after which turn it back off once more when the wind choices up.

In addition, there are many varieties of power garage which can be cheaper and are already successfully in use in Canada, which include water-pumping technology, in which wind is used to power pumps which push water uphill into reservoirs or storage towers in which it may then be used to electricity water turbines while the wind isn't blowing. For destiny use, researchers are growing advanced battery and other technology as a way to permit for mass power garage that is tons more green than another form of mass energy garage presently to be had. Turbines should fee the batteries on windy days for storage and use on calmer days. Wind already works very well today as a part of a deliver mix, and these destiny storage opportunities will make it work even higher.

Question 29. Doesn’t Wind Require Energy Storage Or Gas Make-up Plants In Order To Work?

Answer :

This question is basically similar to (Q28) above. The solution is “No”, for at least two motives. First, wind energy is intermittent, so it wishes to be married to dispatchable power resources inclusive of hydro (water) or biogas. Norway makes use of hydro strength to complement wind technology with wonderful fulfillment: we are able to do the identical with our great hydro assets (eg: Niagara Falls, Quebec, Manitoba, and greater). Dispatchable power resources can be became on/off in milliseconds, in order that customers will by no means revel in a strength scarcity or overage.

Second, herbal fuel is just one shape of dispatchable strength, and simply one shape of fuel deliver. Biogas is any other that is 98% the same as natural gas, and is a lot extra foremost environmentally. Hydro energy is every other (and one that we have loads of), and so is stored power, whether or not saved in capacitor banks, batteries, waterpumped into reservoirs, or some other method of storing electric strength for future use.

Wind can’t provide a complete grid worth of electrical strength on its own, but wind makes a totally reliable deliver that performs predictably with minimal maintenance, and its intermittency is without difficulty controlled by means of complimenting it with different dispatchable assets. Ontario has enough dispatchable deliver to deal with a exceptionally large mix of wind energy already, which some distance exceeds the quantity of wind energy harvesting currently deliberate for set up right here.

Solar Rooftop Pv Interview Questions
Question 30. How Much Wind And Solar Are In Ontario Right Now?

Answer :

Ontario’s strength supply mix varies from everyday, however is approximately 50% nuclear (~10,000 MW), 25% natural fuel (~five,000 MW), 15% hydro (~three,000 MW), 2% coal (~350 MW), 1% wind (~two hundred MW), and 1% different renewables (landfill gasoline, biomass, sun, and so forth). Wind and solar electricity make up a completely small fraction of what’s presently on our grid, even when generating at their complete output.

For greater readability, the “deliver mix” virtually only refers back to the era that we’re presently the usage of in Ontario.

Our grid has a heafty margin of backup gadget linked and ready always, and those numbers are a bit unique: 33% of what’s related to our grid is nuclear (~eleven,500MW), 29% is natural fuel (~10,000 MW), 23% is hydro (~eight,000 MW), 10% is coal (~three,500 MW), four.4% is wind (~1,500 MW), and zero.4% is different renewables like landfill fuel, biomass and sun (~two hundred MW).

Question 31. Why Do Wind Turbines Seem To Spend So Much Time Idle?

Answer :

A well set up wind turbine in Ontario must generate power among 25 and 35% of the time.

Wind tends to blow most throughout shifts in the amount of seen sunshine: daylight brings heat which changes air strain which creates wind. Wind generators generally tend to idle in the center of the day while the solar is regular or within the useless of the night time while the air continues to be.

All varieties of power electricity era have what’s referred to as a “Capacity Factor”, or a range of that tells you ways an awful lot of the time they need to be generating energy. Typical capacity elements for wind strength are between 25 and 35%, PV degrees between 10-20%, hydro is ~forty five%, nuclear varies between 60 – 80%, and many others.

Question 32. We Can’t Control The Weather: How Reliable Are Wind And Solar Really?

Answer :

This is precisely the purpose that software grids need to be planned. On their own, wind and sun strength could not electricity one hundred% of our energy wishes: Germany and Denmark will both quickly have >50% in their electricity from wind and sun, but the relaxation of their mix is furnished by using other complimentary sources. In Ontario, we'd use dispatchable power (power this is without difficulty became on or off when wanted) like hydro and natural fuel to make-up the rest of our deliver blend. That stated, wind and sun mixed are presently much less than 5% of our deliver, and might be for some time but: extra than 10 times extra supply is available in dispatchable energy here, so the intermittency of wind and sun are not a trouble in Ontario, and received’t be until we've got plenty more wind and solar electricity connected to our grid.

There are essential variations among “reliability” and “intermittency”: wind and sun electricity systems are very dependable, however they're also intermittent. “Intermittent” manner that they may be no longer continually to be had (eg: while the solar isn’t shining or the wind isn’t blowing). Wind technology is based on easy automobiles which can be used round the sector in lots of industries very reliably, and wind mills continuously have availability of over ninety seven%: which means that they are greater than ninety seven% reliable, and may be working whilst the wind is blowing.

Some of that final three% is when the wind is blowing so strongly that the wind turbine must flip or throttle itself down in order to not be torn aside with the aid of the wind, so the machines themselves are very reliable (>97%). Solar electricity is even more dependable: over ninety eight% available. The protection logs for wind generators and sun panels are noticeably dull. That’s a signal of reliability. For assessment, nuclear reactors aren't intermittent in any respect (they generate very regular and inflexible outputs, which is why they are able to’t be used for dispatchable strength the way that hydro and natural fuel can), however they're from time to time unreliable: Ontario has about 14,000 MW of nuclear reactors currently, but handiest ~11,500 MW are in use, due to the fact the opposite 2,500 MW have been close down for protection reasons (see the “Farlinger Report” within the 2d and 3rd reference hyperlinks under).

Question 33. Why Do Some Wind Turbines Have Red Flashing Lights?

Answer :

NAV Canada and Transport Canada require that any structures above a positive height and within a sure distance of airfields or air visitors routes have to have signal lighting established on the best unmoving component of their shape as a warning to local air visitors. This rule is the same for mobile-smartphone towers, homes, television and radio broadcast towers, wind turbines, and greater. Each wind energy venture is required to apply to each NAV Canada and Transport Canada to decide whether or not they want flashing signal lights, and the authorities decides whilst these lighting are required: they're not universally required, and they will or might not be needed in any given undertaking.

Powerbuilder Interview Questions
Question 34. What Happens To Turbines At The End Of Their Life?

Answer :

Turbines in Ontario are normally gotten smaller to sell clean strength to our grid for twenty years, and could probably final nicely past this. At the quit of its useful life, what happens to the turbine will rely upon who owns it: if the turbine is on rented land then the condominium rent agreement will include terms that describe what happens to the turbine. If the turbine is owned by means of the equal character who owns the land, then they'll do with it as they wish: recycle it, refurbish it to extend its carrier life, or replace it with updated era.

Question 35. How Do You Replace Shingles Under Pv?

Answer :

Most contemporary PV systems are assured to ultimate at least 20 years, and revel in has shown that many will nonetheless be producing >50% in their rated output after forty years (ie: no longer “good as new”, but nevertheless generating reliably), so it's miles virtually valid to don't forget what effect a PV venture would possibly have to your future ability to resurface your roof. In the suitable case, PV projects must simplest be mounted on roofs which might be rated to remaining any other two decades, together with younger roofs that have been up to date in the last five years, or greater durable roofs that also have ~twenty years omitted of their expected carrier life. Standard residential roofs are rated to ultimate between 20 and 50 years relying at the shingling merchandise used, and business roofs have similarly extensive levels in lifespan, again depending on the surfacing merchandise used. The PV itself will defend the roof from the solar’s rays, and ultraviolet mild from the sun is the leader agent that reasons most roofing materials to degrade over time, so PV will commonly expand the existence of most roofs, mainly asphalt shingles or changed

Question 36. Why “community Power”? Why Not Just Leave It To The Government?

Answer :

Ontario is one of the most effective places in the world where we name power “hydro”, and that’s due to the fact all of our energy become as soon as generated from small hydro dams, actually hundreds of them, positioned anywhere during the province. “Hydro” approach “water”. When Ontario started to test with a big centralized grid, it became necessary to have a crucial operator coordinate that grid, so Ontar