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Showing posts with label cleantechnica. Show all posts
Showing posts with label cleantechnica. Show all posts

Saturday, March 10, 2018

Breaking the Cycle of Anti-nuclear Indoctrination--the "Electric vehicles will store excess electricity from wind and solar" argument

My old Leaf, my new Bolt, and a Tesla Model S

From a comment field under a GTM article:

Me:
I just bought my second generation electric car because my old car battery has finally reached the point that I can't reliably do my commute without hitting a fast charger. That would have happened sooner had the utility been sharing it.
Anonymous anti-nuclear indoctrination victim:
Actually, no:

"Intelligent use of vehicle to grid (V2G) technology can improve the battery life of electric vehicles according to a new study from the University of Warwick, potentially disproving a key criticism levelled at the technology."

Please try to keep up.

This is a typical case of a tale growing larger with each retelling. He/she was quoting from an article in Clean Energy News titled V2G found to improve the lifetime of electric vehicle batteries about a study published in Science Direct Energy titled On the possibility of extending the lifetime of lithium-ion batteries through optimal V2G facilitated by an integrated vehicle and smart-grid system.

He/she never read past the click-bait headline and certainly didn't read the study. It's no secret that one can optimize battery life by not letting it sit idle for long periods at high states of charge and by avoiding certain temperature regimes when charging or discharging it. But there are operational trade-offs associated with doing that.

When I first bought my Nissan Leaf (6.5 years ago) I charged it only to 80% to extend its battery life. However, after a few incidents where I wish I had that extra 20%, I stopped doing it. And as battery capacity fades over the years, the last thing you want to do is further reduce your range by reducing the charge on your car.

Another option (other than not fully charging your car) would be to bleed electricity from your battery to lower the state of charge when it's going to sit idle for most of a day by turning on the heater (and hope you won't regret doing that when you don't have enough range one day). But you paid to charge the battery and dumping its energy to the air to extend its life would be a losing proposition. Ideally, you would instead use that electricity to save money by displacing grid electricity.

Using the above ideas, the study concluded that it would not be feasible to use electric cars for energy arbitrage at the household level. However, it hypothesized that it might be feasible for large commercial buildings to use employees' electric cars in a "smart car parking lot" to buy and sell energy on the grid (sell when demand and price is high, buy when they are lower).

Criteria needed to match this study's results:

Sunday, January 1, 2017

CleanTechnica—Does Solar and Wind Really Crush Coal and Nuclear, Promote National Energy Freedom (aka Energy Independence), Improve the Economy?



Although solar and wind will be a major part of future low carbon energy grids, they have their limits. If that were not true, why would we bother with both when we could just pick one or the other? Future low carbon energy grids will be a mix of nuclear, wind, solar, hydro, biomass, etc, with just enough natural gas to stitch the various sources together.

Zachary Shahan begins his article with screenshots of the Lazards 10.0 LCOE study with two vertical lines drawn on it in an attempt to demonstrate that wind and solar are typically cheaper than new coal, natural gas, or nuclear power plants.”

If by typical, he means cheaper regardless of where in the country they might be installed, he’s wrong.

If he meant cheaper only in the sunniest and windiest of places, then obviously, they will not always be cheaper than other energy sources. And even if they were the cheapest regardless of where they are installed, a grid using them would still require several other types of energy sources, more expensive or not, to provide the lowest overall cost to consumers. Be it the mother board in your computer or an electrical grid, some components will cost more than others to provide the lowest overall cost of the final product.

I created Figure 1 below to explain why he is wrong. Hydro, wind, and solar are natural resources and they are not equally plentiful everywhere. Lazards states that the solar prices are only for areas of high solar insolence (the Southwest) and in the case of wind, only where it blows hard enough to use 35% to 50% of rated capactiy (windy places) and that the prices don’t include things like extra transmission lines. Read the disclaimer at the top of Figure 1.

Figure 1: Explanation of the limits of the Lazards LCOE chart.


The author presents (largely incorrect) messages for anyone wanting a better US economy …anyone wanting national energy freedom (aka energy independence), anyone wanting to advance the most cost-effective choices for electricity generation, and anyone wanting to make logical energy decisions ...[to] share with others.”

I would advise anyone reading that article to think twice before sharing it with others for the following reasons:

Tuesday, December 20, 2016

CleanTechnica Watch: Comment Analysis of Thorium Article--Volume 1



In this article I clean up behind CleanTechnica's community manager who made a total of 87 comments under an antinuclear article published on CleanTechnica. Consider it a debate where each debate partner is banned from the other's comment field :  )

Some pronuclear commenters had their remarks held for moderation (even though CleanTechnica's comment rules claim they never do that) which were subsequently never published, while others had comments deleted. I saw one instance where this community manager posted a long rebuttal ...to a comment he'd deleted! Apparently, he does this fairly routinely.

Because the CleanTechnica community manager made 17% of the 509 comments before he shut them down, I'll be parsing them by category. I'm also breaking this up into more than one volume. This is Volume 1. The community manager's arguments occasionally trip on each other but in a nutshell they are based on his erroneous insinuation that wind will always cost less everywhere and that storage will fix the intermittency problems.

Feel free to drop into that comment field to see quotes taken from it in full context.

Cost

The CleanTechnica community manager's main argument is that when wind costs less then nuclear, we should replace nuclear with it.

Using that simplistic reasoning, we should eliminate all other new low carbon sources of energy that may cost more than onshore wind (which, in the U.S., would, in addition to new nuclear, include solar PV, solar thermal, offshore wind, geothermal, and biomass). See Figure 2.

Tuesday, December 6, 2016

CleanTechnica Watch



CleanTechnica Watch will be an ongoing series of articles that discuss their antinuclear energy articles, which are typically either republished from other antinuclear energy sources or written by an assortment of antinuclear guests.

You can think of these articles as a form of public peer review.

Their policy of hoovering up antinuclear pieces to put on their website is a convenience for me in that they have become my go-to source for nuclear energy misinformation material.

In a nutshell, CleanTechnica promotes the belief that the planet can decarbonize without help from nuclear.

Reality Check

The German Energy Transition
 

Studies, and there is no shortage of them, have limited value. As any experienced engineer knows, real world data trumps theoretical calculation.

Luckily we have the German experiment (often referred to as the Energiewende or Energy Transition) which has been testing the hypothesis that a highly motivated, wealthy, industrialized nation can rapidly decarbonize its electrical grid by displacing nuclear energy with wind and solar.

The experiment isn't complete, but it has already provided a wealth of real-world data.

Putting the cost into perspective

The roughly $30 billion dollars being spent annually to expand wind and solar in Germany could build enough third generation AP 1000 nuclear reactors to fully decarbonize their grid over a ten year period (similar to what France did decades ago).

$30 billion a year would pay for forty custom built $7.5 billion Generation III AP1000 reactors over ten years.

$30B/year x 10years  = $300B

$300B/$7.5B = 40 AP1000 reactors

Add those to existing reactors and they could supply about 97% of Germany's electricity by 2025.

From the German Minister for Economic Affairs and Energy, second in command to Merkel, who was also the Federal Minister for the Environment, Nature Conservation and Nuclear Safety from 2005 to 2009:

I don’t know any other economy that can bear this burden [$30billion a year]...We have to make sure that we connect the energy switch to economic success, or at least not endanger it. Germany must focus on the cheapest clean-energy sources as well as efficient fossil-fuel-fired plants to stop spiraling power prices."

While renewable aid costs are at the “limit” of what the economy can bear, Germany will keep pushing wind and solar power, the most cost-effective renewable sources, Gabriel said. Biomass energy is too expensive and its cost structure hasn’t improved, he said.


Biomass

Growth of biomass essentially stopped when its subsidies were truncated. It currently provides roughly four percent of Germany's total energy (electricity, heat, transport) consumption.

Given the discussion about the sustainability of biomass, the question is therefore whether the Energiewende itself is sustainable. That’s one reason why the German government has slammed the brakes on biomass.

Sunday, November 27, 2016

CleanTechinca Writes Last Antinuclear Energy Article—Pigs Fly




Frankly, we primarily stopped writing about nuclear since everyone in the industry should know by now it is an industry entering its retirement stage.

...so says Zachary Shahan in yet another antinuclear article. Interestingly enough, I wrote an article earlier this year critiquing yet another of their antinuclear energy articles.

However, because of the interest (and backlash) the Before the Flood article raised, I decided it was worth communicating this point one more time [emphasis mine].

If CleanTechnica really believed that nuclear energy is “entering its retirement stage” they wouldn’t still be writing antinuclear articles.

Using Bill McKibben’s climate change war analogy, Figure 1 below lists our four main weapons against climate change in descending order of deployment:

Figure 1: Low Carbon Sources of Energy in United States via 2016 BP Review

Pronuclear comment is not welcome at CleanTechnica. From their original comment policy page:

This site is not the place to discuss future nuclear designs that might make nuclear affordable, the unproven GenIV type stuff that might or might not work. If there’s a clear demonstration of affordable nuclear sometime in the future [China will begin replacing the furnaces in many of its coal plants with Gen IV, gas cooled, pebble bead reactors as soon as 2018 and Russia just put a breeder reactor into commercial operation last month], then we can open up the discussion about the role nuclear could play in replacing fossil fuels.

In the meantime, there are several sites where they love to discuss nuclear ideas. Feel free to take your speculations to one or more of those sites. We’re going to stick with stuff that is affordable and practical.

[Aside]

 Shahan began his article with praise of another antinuclear article.