Last Coal Fired Power Plants in New England to close

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peakbagger

Minister of Fire
Jul 11, 2008
8,845
Northern NH

One of them had a state of the art emission control system. The regional utility, Eversource owned them until about 5 years ago but divested all their power generation. A hedge fund bought them for a big discount and the ratepayer made up the difference. They have recently had a problem that they could not compete in the ISO New England energy auctions. At least of the boiler at Merrimack burned low grade wood but that was shut down several years ago. They did run during periods of high power demand, no doubt ISO New England will issue another report that the region is cutting it close on power generation. The planned offshore wind plants had better get built soon.
 
Even the best Supercritical coal plants based around a boiler and steam turbine are around 40% fuel efficient, Combined Cycle gas plants based around natural gas combustion turbine with downsteam steam turbine are in excess of 50% efficient. A combined cycle can be ramped up and down very quicky (minutes) while a coal plant take hours or days.

The only possible value to an old coal plant is if one of the Small Modular Reactors ever gets built as they are based on steam cycle. Concevinably if an when fusion power get commercialized the same might apply. There are couple of big coal plants out west that various entities hope to be used that way but as of now the only SMR manufacturer with a license is laying off people.

Since the coal plants to be shut down have good interconnections with the grid, I expect lot of batteries will be installed. Central Maine Power did that up the coast at the former Wyman Oil Fired station.
 
I figured that the turbines would largely be the same, that the conversation would mostly be changing over the boilers and getting the new fuel to the site.

If the general consensus is to switch to electricity, shutting down production seems like a step back.
 
If a utility still owned them they might layup of the plants and let them sit for awhile but a hedge fund/private investor wants to turn it over quick. If someone gets cold in the middle of the winter because the grid browns out, its not their problem. That is a big issue nationwide, many states will not even allow utilities to build power plants and the banks are far less likely to lend money to merchant plants as no one knows what the grid will look like in 10 to 20 years. Power plants are usually 20 plus year assets. Texas is learning that right now, old power plants are being shut down and the not enough new private plants are getting built to handle weather extremes.
 
We have a bunch of thermal coal plants that were converted to natural gas, they work, and help supply baseload power. They are however slowly being replaced with combined cycle. The thermal plants cant compete effectively because the combined cycle burn 2/3rds the fuel.

We even have one coal power plant that was converted to combined cycle, they brought in a large gas turbine and the waste heat from the gas turbine now powers the steam turbine.
 
I figured that the turbines would largely be the same, that the conversation would mostly be changing over the boilers and getting the new fuel to the site.

If the general consensus is to switch to electricity, shutting down production seems like a step back.

Not if a bunch of SWB renewables are coming on line with lower costs.
 
Gotcha. Thank you. Trying to electrify houses and cars will take a lot of generating capacity. I’d hate to take some off line when they need to keep making more.
 
Gotcha. Thank you. Trying to electrify houses and cars will take a lot of generating capacity. I’d hate to take some off line when they need to keep making more.

Hmmm. Does that include generation that is a lot more expensive than other options? How expensive is too expensive?

Electrifying all cars will increase electrical demand about 20%. Figure that will take 20 years and its 1% per year.

Electrifying all home heating is a bigger number, but will take even longer. And New England will probably lag that transition.
 
From my understanding (I didn't do any research so I may not have it right), those plants aren't used often - just for super high demand days. Changing to burning NG probably isn't a good option, at least for the plant in Bow, as it would all have to be trucked there.

It seems as if they are changing to be a holding station for power dispersal during peak demand times. Will it work out well? IDK, but they can't pass the emissions tests currently so run the risk of being shut down anyway.
 
Hmmm. Does that include generation that is a lot more expensive than other options? How expensive is too expensive?

Electrifying all cars will increase electrical demand about 20%. Figure that will take 20 years and its 1% per year.

Electrifying all home heating is a bigger number, but will take even longer. And New England will probably lag that transition.
The cost for the last bit of energy needed sets the rate. 1% increase per year is still a large number. It’s probably easier to tackle a number that big by decreasing demand from other uses, like homes via insulation than building new power generation. Shutting down plants doesn’t help this goal.
 
The big issue with coal and other fossil is for a cold stretch its dispatchable. Out in the yard next to coal or fuel oil plant is the fuel needed to run for several days or weeks. Due to the predominant geology in New England, there is no good place to store natural gas as natural gas is not very energy dense. In the middle Atlantic it can just be left in the ground and extracted as needed (within limitations) but New England by political choice or inaction has a bottleneck between it and the gas fields and gas storage.

At a big capital cost and ongoing operating cost, natural gas can be turned into liquified natural gas for short term storage but it takes a lot of energy to run the equipment and no one wants a LNG in their county as a major tank failure can have the effects of a small tactical nuke to a large area . Here is video on a very small tank, a LNG storage tank sufficient to back up a regional power plant is 1000 times larger. The old rule of thumb was $2 a therm premium and expect that has gone up.

No doubt New England is making a huge bet, to meet climate goals the US needs to decarbonize heating and transportation. Even the new stretched out EPA standards will effectively phase out most gas powered passenger cars and trucks (or at least make them even more unaffordable) within 10 years. Currently predictions are that farmers are going to be shifting to soybeans rapidly from corn as the demand for soybean based biodiesel will go up while ethanol demand will drop hand in hand with the drop in gasoline demand. One of the side effects of this shift is there is going to be a surplus of soy based protein available as biodiesel only used the oil pressed out of the soy.

There is a relatively "drop in" replacement for heating oil called ethyl levulinate made with cellulosic residues for those who cannot electrify their heating. There is a relative "drop in" for #4 fuel oil for large institutional and commercial heating called Renewable Fuel Oil made with waste cellulose (currently made with low grade wood). It is used in a couple of college district heating systems in Maine as the well as the Memorial Hospital in North Conway NH. They both are basically sidelined by cheap fossil. Let fossil drift up to consistently be over $100 a barrel (OPEC goal currently being stymied by cheap US oil) and these alternatives become viable. All this replacement tech would take several years to ramp up, so the risk is what happens if there is consistently cold stretch some winter between now and then.
BTW even the Europeans that are taking climate change far more serious expects to need more natural gas over the coming years to fill in the shortfall until renewables really kick in.

Lot to be said for having a couple of years of dry firewood and good wood stove or boiler with storage in the future . ;)
 
It’s too bad we can’t harvest the natural gas that is just flared off in the Dakotas. It’s being burnt anyway. I’m sure the server farms and other energy intensive businesses have looked into relocating there. It just seems so… wasteful.
 
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It’s too bad we can’t harvest the natural gas that is just flared off in the Dakotas. It’s being burnt anyway. I’m sure the server farms and other energy intensive businesses have looked into relocating there. It just seems so… wasteful.
A lot of the flaring has been reduced by regulation. And much of that stranded gas it being used to run small generators... and crypto miners. :rolleyes:
 
OK, I will agree that it is not clear whether closing a coal plant is a good thing or a bad thing, it depends on the context. And I suspect, it being New England, that @peakbagger is more likely correct about the context than say, a starry eyed optimist like Tony Seba.

If we need to have a small number of dispatchable power generation systems around to provide supply security, then the regulations should be written to allow that (by for example requiring staying below some total emission level on a quarterly or annual basis). If these stations run 5% of the time, instead of 80% of the time, their emissions are effectively irrelevant. The resulting high cost of the power produced (caused by the low capacity factor) will still provide an economic incentive for replacing them in the long term (say with SWB energy).

But I fear (as I suspect many poster do) that this is just poorly thought out NIMBYism and poor management by NE ISO. As I have ranted about in the past ;em I think that the current awful state of the energy system in New England, currently blamed on some unique geology or the perfidy of New York state, is just as much due to poor (and perhaps corrupt) grid management and public policy decisions over the last couple decades. This could just be more of the same.
 
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NPP just reported they will close in 2028. That’s enough time to plan for any capacity loss. And change to keep them open longer .
 
But I fear (as I suspect many poster do) that this is just poorly thought out NIMBYism and poor management by NE ISO. As I have ranted about in the past ;em I think that the current awful state of the energy system in New England, currently blamed on some unique geology or the perfidy of New York state, is just as much due to poor (and perhaps corrupt) grid management and public policy decisions over the last couple decades. This could just be more of the same.

Therein lies the rub, if you believe the overwhelming worldwide scientific agreement that global warming is happening and that mankind can reduce the impact, then New England is doing the right thing making the transition now away from fossil fuel power to an expanding mix of renewables (and a nuke) using natural gas as ever decreasing bridge and avoiding the easy path of just piping in more natural gas. Painful as it may be currently, it will be far less painful in doing it later to meet climate agreements. When natural gas is displacing coal, its easy to hold up natural gas as solution to short term CO2 issues as it puts out considerably less CO2 per MWhr but once those coal retirements have occurred, then natural gas plants become the next technology that has to go.
 
They closed the nuke plant in VT. I’ve heard rumblings of closing more. When you hamstring yourself in multiple directions, one has to wonder what the real goals are.
 
It wasn’t economically feasible to keep them running. If they could make money they would keep them running
how much are regulations costing some,a lot? but that’s the price of doing business. Natural gas is profitable right now so is wind and solar. Just need to look at graph of coal production.
 
Only nukes left are the twin Millstones in CT (1970) and the single Seabrook (1990) in Maine. Even with license extensions they were just getting too old and in order to extend the licenses very expensive replacements of major nuclear components would need to be done. They originally were designed for 20 year lives and subsequent research allowed 20 year extensions. There are now attempts to extend the lives another 20 years.

BTW, the administration just cut a check for 1.5 billion to rebuild and reopen a nuke in Michigan to the company that was paid to tear it down.

Some of the new offshore windfarms going on line off New England are getting up to the size of an older nuclear plant. I think the "bet" is to build out the offshore windfarms. The big builder of these plants, Orsted, underbid a few projects and pulled out but now that other plants are going online, those projects appear to be back on. Maine is getting ready to build a large deepwater wind turbine onshore assembly facility in Searsport Maine and the DOE has just approved a location for offshore turbines. These will be floating turbines in deep water. Regional fisherman are objecting to the windfarm site and are reportedly propped up by the fossil industry and MAGA folks who are opposed to renewables. The same crew was trying to tie whale deaths and injuries to the offshore wind farm construction, but most reliable studies seem to show no issues. It turns out cargo shipping seems to be the biggest impact.
 
Decentralization will most likely be key to stability. Lots of different things feeding into the grid.
 
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Transmission folks dislike decentralization as the system was designed as a hub and spoke system where power flowed out from central stations, With a distributed grid, power sources are spread all over, fault currents can go everywhere so modeling of steady and transient power conditions is quite complex. That is one of the many reasons why the interconnect applications for new solar farms are delayed, in some cases for years.
 
Therein lies the rub, if you believe the overwhelming worldwide scientific agreement that global warming is happening and that mankind can reduce the impact, then New England is doing the right thing making the transition now away from fossil fuel power to an expanding mix of renewables (and a nuke) using natural gas as ever decreasing bridge and avoiding the easy path of just piping in more natural gas. Painful as it may be currently, it will be far less painful in doing it later to meet climate agreements. When natural gas is displacing coal, its easy to hold up natural gas as solution to short term CO2 issues as it puts out considerably less CO2 per MWhr but once those coal retirements have occurred, then natural gas plants become the next technology that has to go.

This is indeed to rub. But there are (at least) two paths to solving the problem. And IMO the jury is still out which is the better one.

Path 1 says time is of the essence, and damn the torpedos. This path says that we should adopt new low carbon tech (solar, wind, offshore, batteries, EVs) as soon as they are barely affordable. Affordability can include a fat govt subsidy, which is deemed affordable by politicians from tax (or borrowing) revenue. This says that society as a whole must bear some burdensome costs to pulling the transition forward. If the threat is existential, or has massive economic costs downstream, it is argued that this approach will save the most money and lives in the long term.

Path 2 says we should do everything we can to engineer solutions, and to get them to scale. Mass adoption will occur only when prices can compete with fossil tech, no govt intervention required. Ofc, the govt role is not to bankroll a trillion $ transition, but to nudge the system towards the proper path by regulations and smaller incentives. If applied consistently (not a talent of some govts) this can provide a level playing field for rapid innovation and competition to occur, and pull the adoption curve forward, at a much lower cost to taxpayers.

Proponents of Path 1 can argue that Path 2 will cost lives (and perhaps money) in the long run.
Proponents of Path 2 can argue that the transition is a marathon and not a sprint, and Path 1 can often end up incompletely solving the problem, while running up a lot of debts, paying for scams and creating opposition. Such that Path 2 might get to a solution faster than Path 1.

Its like the tortoise and the hare. it is not clear which path will solve the problem first. They correspond to Copenhagen vs Paris. This will only be clear in hindsight.

For some examples... we can look at California and Texas. Both have piles of renewable energy. California build theirs early at ratepayer and taxpayer expense, and with things like mandates for rooftop solar in new construction. And has high electricity rates in many markets. Texas took Path 2. I assume it has some incentives for renewable installation, don't know. These might be streamlined permitting, tax benes or some such?

Will Texas ever blow past California in renewable energy per capita? If so, they will likely do so at lower ratepayer and taxpayer cost. And a future backlash from Cali ratepayers or pols might be part of the problem. Could the Tortoise win the race?

Second example: Germany versus US. Germany launched a VERY expensive energy revolution, and within a few years it became a political football because a small number of (mostly wealthy) rooftop solar owners with very $$$ systems were guaranteed incredible net metering deals for decades into the future. So, keep the deal (and it is a political albatross preventing further investment) or break the contracts, and tick off the green early adopters.

Will the US (Biden and Feds are taking Path 2) get to lower carbon per kWh than Germany at some point in the future? We shall see.

Given the appalling German decision to shutter working Nuke plants, and to continue burning lignite... its hard to argue that their revolution is driven by an optimal scientific process... its political as much as the Biden plan is.

What is my point: New England looks to me like it is taking (and doubling down on) Path 1. With Mass likening itself to 'California East' while having rather different culture, infrastructure and climate. And NE ISO shutting down its nukes (and maybe fossils) before replacements are in place. And the electric ratepayers be damned!

And what is the result... the high kWh costs are a huge impediment to electrification of home heating and EV adoption. If New England is not already above the median CO2 per capita emissions of the US, I think they will be shortly. I think NE ISO is below the median for CO2e/kWh, but all the oil heat and (more in the future) lack of EVs will I fear tip the scales. The solution? MORE Path 1 incentives for heat pumps and EVs in New England to compensate. Will that be affordable at the level needed to move the needle?

20 years ago the mid-Atlantic had almost as much oil heating as southern New England. And with our cheap alternatives, it got almost completely phased out by 2020 without incentives (unless you count fossil incentives). Victory for Path 2 in PA.