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RegGuheert
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Re: $2.2 billion solar thermal plant known as Ivanpah

Sun May 22, 2016 10:46 am

I wonder if the owners have been pushing a bit too hard to meet contractual requirements: from March: NRG Says Massive California Solar Plant Now On Pace To Meet Goal
Bloomberg wrote:The Ivanpah Solar Electric Generating System, the world’s biggest solar-thermal power plant, generated 67,300 megawatt-hours electricity in February, up from about 30,300 a year earlier, according to NRG Energy Inc., which operates the faculty and co-owns it with BrightSource Energy Inc. and Alphabet Inc.’s Google.
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

GRA
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Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: $2.2 billion solar thermal plant known as Ivanpah

Sun May 22, 2016 2:32 pm

RegGuheert wrote:I wonder if the owners have been pushing a bit too hard to meet contractual requirements <snip>

I don't see how that could be a contributing factor, if the cause of the fire was misaligned mirrors as appears to be the case. Unless some maintenance that should have been done, wasn't, but that would imply that they were willing to waste power through mirror misalignment, which would be counterproductive.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

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RegGuheert
Posts: 5523
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: $2.2 billion solar thermal plant known as Ivanpah

Sun May 22, 2016 7:38 pm

GRA wrote:I don't see how that could be a contributing factor, if the cause of the fire was misaligned mirrors as appears to be the case.
The quote that you snipped indicated that energy production in February was over twice what it had been in 2015. Insulation is not going to be double over last year, which implies there is a significant improvement in pointing. My guess is that they are gradually bringing more mirrors online to allow them to monitor temperatures and pressures as things get hotter and hotter. If you rush that process, than programming errors are bound to happen.
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

GRA
Posts: 7252
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: $2.2 billion solar thermal plant known as Ivanpah

Mon May 23, 2016 4:34 pm

RegGuheert wrote:
GRA wrote:I don't see how that could be a contributing factor, if the cause of the fire was misaligned mirrors as appears to be the case.
The quote that you snipped indicated that energy production in February was over twice what it had been in 2015. Insulation is not going to be double over last year, which implies there is a significant improvement in pointing. My guess is that they are gradually bringing more mirrors online to allow them to monitor temperatures and pressures as things get hotter and hotter. If you rush that process, than programming errors are bound to happen.

Alternatively, the gain over last year was due to improvements in the reliability of the boilers etc., which I vaguely recall were frequently offline in the past. We lack enough info to say what the actual cause of the failure was here.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

User avatar
RegGuheert
Posts: 5523
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
Leaf Number: 5926
Location: Northern VA

Re: $2.2 billion solar thermal plant known as Ivanpah

Thu May 18, 2017 11:28 am

Roger Andrews recently wrote a review of solar thermal generation in the US. One thing I learned there is that the Crescent Dunes molten salt facility in Nevada was down for six months starting in October 2016 due to a leak in the salt tank:
Roger Andrews wrote:Last on the agenda is Crescent Dunes, the project that gave birth to this post. As shown in Figure 5, Crescent Dunes started operations in October 2015 and took its time ramping up, but by the late summer of 2016 it was achieving respectable capacity factors of between 30 and 40%. But then in early October a leak developed in the molten salt circuit and the plant was shut down, and it has stayed shut down in the five months since (probably now for six months. On March 2 of this year it was expected that it would be “another few weeks” before operations recommenced. But as of the time of writing there are no reports of the plant restarting, so presumably it’s still down):

Here's Figure 5:
Image
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10K miles on Apr 14, 2013. 20K miles (55.7Ah) on Aug 7, 2014, 30K miles (52.0Ah) on Dec 30, 2015, 40K miles (49.8Ah) on Feb 8, 2017.
Enphase Inverter Measured MTBF: M190, M215, M250, S280

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