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Member Run Boards >> Environment >> Solar mirror plant to close
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Message started by Bobby. on Feb 14th, 2025 at 7:22am

Title: Solar mirror plant to close
Post by Bobby. on Feb 14th, 2025 at 7:22am
https://edition.cnn.com/2025/02/13/climate/ivanpah-desert-solar-closing/index.html


This alien-like field of mirrors in the desert was once the future of solar energy.
It’s closing after just 11 years.






Ivanpah was the largest concentrated solar power facility in the world when it opened in 2014, just over a decade, it's slated to close.

David McNew/Getty Images

CNN

From a distance, the Ivanpah solar plant looks like a shimmering lake in the Mojave Desert. Up close, it’s a vast alien-like installation of hundreds of thousand of mirrors pointed at three towers, each taller than the Statue of Liberty.

When this plant opened near the California-Nevada border in early 2014, it was pitched as the future of solar power. Just over a decade later, it’s closing.

The plant’s co-owner NRG Energy announced in January it was unwinding contracts with power companies and, subject to regulatory approval, would begin closing the plant in early 2026, readying the site to potentially be repurposed for a new kind of solar energy.

For some, Ivanpah now stands as a huge, shiny monument to wasted tax dollars and environmental damage — campaign groups long criticized the plant for its impact on desert wildlife. For others, failures like this are a natural part of the race to find the winning solutions for the clean energy transition.

When Ivanpah was conceived, its technology, called concentrated solar or thermal solar, was considered a potential breakthrough.

It works like this: Hundreds of thousands of computer-controlled mirrors called “heliostats” track the sun and concentrate its rays onto three towers, each around 450 feet tall and topped with water-filled boilers. The sun’s hyper-concentrated energy turns this water to steam, which drives a turbine to create electricity.

One of the key selling points of this solar technology is the ability to store heat, allowing the production of electricity at night or when the sun isn’t shining without needing batteries.

Title: Re: Solar mirror plant to close
Post by Bobby. on Feb 14th, 2025 at 9:34am

That article shows you how difficult renewable energy is.

Maybe Dutton is right to go nuclear?    :-/

Title: Re: Solar mirror plant to close
Post by Leroy on Feb 14th, 2025 at 9:38am

Bobby. wrote on Feb 14th, 2025 at 9:34am:
That article shows you how difficult renewable energy is.

Maybe Dutton is right to go nuclear?    :-/


Steam turbines require heat but that heat has to be at pressure at least 10mpa.

Title: Re: Solar mirror plant to close
Post by Bobby. on Feb 14th, 2025 at 9:41am

Leroy wrote on Feb 14th, 2025 at 9:38am:

Bobby. wrote on Feb 14th, 2025 at 9:34am:
That article shows you how difficult renewable energy is.

Maybe Dutton is right to go nuclear?    :-/


Steam turbines require heat but that heat has to be at pressure at least 10mpa.



That is 98 atmospheres - a lot of pressure and high temperature.

The higher the pressure the greater the thermodynamic efficiency.


Title: Re: Solar mirror plant to close
Post by Leroy on Feb 14th, 2025 at 9:51am

Bobby. wrote on Feb 14th, 2025 at 9:41am:

Leroy wrote on Feb 14th, 2025 at 9:38am:

Bobby. wrote on Feb 14th, 2025 at 9:34am:
That article shows you how difficult renewable energy is.

Maybe Dutton is right to go nuclear?    :-/


Steam turbines require heat but that heat has to be at pressure at least 10mpa.



That is 98 atmospheres - a lot of pressure and high temperature.

The higher the pressure the greater the thermodynamic efficiency.


17mpa @ 515deg is more normal for a good sized turbine.

Title: Re: Solar mirror plant to close
Post by lee on Feb 14th, 2025 at 1:03pm
Aside from killing birds "smokers", it never achieved its calculated rating. And it had to use fossil fuel to keep the turbines going. It never retained enough heat.

Title: Re: Solar mirror plant to close
Post by Bobby. on Feb 14th, 2025 at 2:27pm

Leroy wrote on Feb 14th, 2025 at 9:51am:

Bobby. wrote on Feb 14th, 2025 at 9:41am:

Leroy wrote on Feb 14th, 2025 at 9:38am:

Bobby. wrote on Feb 14th, 2025 at 9:34am:
That article shows you how difficult renewable energy is.

Maybe Dutton is right to go nuclear?    :-/


Steam turbines require heat but that heat has to be at pressure at least 10mpa.



That is 98 atmospheres - a lot of pressure and high temperature.

The higher the pressure the greater the thermodynamic efficiency.


17mpa @ 515deg is more normal for a good sized turbine.



Yes - that is a more practical value that is actually used.


Title: Re: Solar mirror plant to close
Post by Bobby. on Feb 14th, 2025 at 2:31pm

lee wrote on Feb 14th, 2025 at 1:03pm:
Aside from killing birds "smokers", it never achieved its calculated rating.
And it had to use fossil fuel to keep the turbines going.
It never retained enough heat.



That article doesn't say that.

Title: Re: Solar mirror plant to close
Post by lee on Feb 14th, 2025 at 4:32pm

Bobby. wrote on Feb 14th, 2025 at 2:31pm:
That article doesn't say that.



Which doesn't make it untrue.  ;)


"The plant burns natural gas each morning to commence operation. The Wall Street Journal reported, "Instead of ramping up the plant each day before sunrise by burning one hour's worth of natural gas to generate steam, Ivanpah needs more than four times that much."[37] On August 27, 2014, the State of California approved Ivanpah to increase its annual natural gas consumption from 328,000,000 cubic feet (9,300,000 m3) of natural gas, as previously approved, to 525,000,000 cubic feet (14,900,000 m3)"

https://en.wikipedia.org/wiki/Ivanpah_Solar_Power_Facility#Fossil_fuel_consumption

Title: Re: Solar mirror plant to close
Post by Bobby. on Feb 14th, 2025 at 4:34pm

lee wrote on Feb 14th, 2025 at 4:32pm:

Bobby. wrote on Feb 14th, 2025 at 2:31pm:
That article doesn't say that.



Which doesn't make it untrue.  ;)


"The plant burns natural gas each morning to commence operation. The Wall Street Journal reported, "Instead of ramping up the plant each day before sunrise by burning one hour's worth of natural gas to generate steam, Ivanpah needs more than four times that much."[37] On August 27, 2014, the State of California approved Ivanpah to increase its annual natural gas consumption from 328,000,000 cubic feet (9,300,000 m3) of natural gas, as previously approved, to 525,000,000 cubic feet (14,900,000 m3)"

https://en.wikipedia.org/wiki/Ivanpah_Solar_Power_Facility#Fossil_fuel_consumption



Thanks -
despite how impressive it looks the whole project was a dud.

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