Ivanpah Solar Power Facility: Difference between revisions

Coordinates: 35°34′N 115°28′W / 35.57°N 115.47°W / 35.57; -115.47
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A small fire was reported on 19 May 2016 when misaligned mirrors reflected sunlight into a level of Unit 3 tower not designed to collect power, shutting down the tower for repairs.<ref name=":0" /> As another of the three power-generating units was already offline for scheduled maintenance, the plant was left with only one third of its installation functional.<ref name=":0">{{Cite news|url=http://bigstory.ap.org/article/1cd292f7228040228e744fe0ea611b8d/mirrors-blamed-fire-worlds-largest-solar-plant|title=Mirrors blamed for fire at world's largest solar plant|last=Staff|first=|date=19 May 2016|work=The Big Story|agency=Associated Press|access-date=23 May 2016|via=}}</ref>
A small fire was reported on 19 May 2016 when misaligned mirrors reflected sunlight into a level of Unit 3 tower not designed to collect power, shutting down the tower for repairs.<ref name=":0" /> As another of the three power-generating units was already offline for scheduled maintenance, the plant was left with only one third of its installation functional.<ref name=":0">{{Cite news|url=http://bigstory.ap.org/article/1cd292f7228040228e744fe0ea611b8d/mirrors-blamed-fire-worlds-largest-solar-plant|title=Mirrors blamed for fire at world's largest solar plant|last=Staff|first=|date=19 May 2016|work=The Big Story|agency=Associated Press|access-date=23 May 2016|via=}}</ref>
Unit 3 resumed operation on June 8, 2016, within three weeks of the incident.
Unit 3 resumed operation on June 8, 2016, within three weeks of the incident.
All three units seemed back in operation by June 20, 2016. Solar thermal electricity production in California peaked at 703 MW on that day,<ref>{{cite web|title=Renewables Watch for Operating Day: Monday, June 20, 2016|url=http://content.caiso.com/green/renewrpt/20160620_DailyRenewablesWatch.pdf|website=California ISO Renewables Watch|accessdate=21 June 2016}}</ref> up from 452 MW on e.g. June 7 when two units were offline.<ref>{{cite web|title=Renewables Watch for Operating Day: Tuesday, June 07, 2016|url=http://content.caiso.com/green/renewrpt/20160607_DailyRenewablesWatch.pdf|website=California ISO Renewables Watch|accessdate=21 June 2016}}</ref>
All three units seemed back in operation by June 20, 2016. Solar thermal electricity production in California peaked at 703 MW on that day,<ref>{{cite web|title=Renewables Watch for Operating Day: Monday, June 20, 2016|url=http://content.caiso.com/green/renewrpt/20160620_DailyRenewablesWatch.pdf|website=California ISO Renewables Watch|accessdate=21 June 2016}}</ref> up from 452 MW on June 7 when two units were offline.<ref>{{cite web|title=Renewables Watch for Operating Day: Tuesday, June 07, 2016|url=http://content.caiso.com/green/renewrpt/20160607_DailyRenewablesWatch.pdf|website=California ISO Renewables Watch|accessdate=21 June 2016}}</ref>


== Environmental impacts ==
== Environmental impacts ==

Revision as of 13:09, 4 August 2016

Ivanpah Solar Electric Generating System
Looking north towards Ivanpah Facility's eastern boiler tower from Interstate 15.
Map
CountryUnited States
Locationnear Ivanpah, San Bernardino County, California
Coordinates35°34′N 115°28′W / 35.57°N 115.47°W / 35.57; -115.47
StatusOperational
Construction began2010
Commission date2014[1][2]
Construction cost$2.2 billion
Owner(s)NRG Energy
BrightSource Energy
Google
Solar farm
TypeCSP
CSP technologySolar power tower
Collectors173,500
Site resource2,717 kW·h/m2/yr
Power generation
Units operational3
Make and modelSiemens SST-900
Nameplate capacityUnit 1: 126 MW
Units 2 and 3: 133 MW each.
Planned: 392 MW gross, 377 MW net[3]
Annual net output940 GW·h[4]
External links
Websiteivanpahsolar.com
CommonsRelated media on Commons
[edit on Wikidata]

The Ivanpah Solar Electric Generating System is a concentrated solar thermal plant in the California Mojave Desert, 64 km (40 miles) southwest of Las Vegas, with a gross capacity of 392 megawatts (MW).[5] It deploys 173,500 heliostats, each with two mirrors, focusing solar energy on boilers located on three centralized solar power towers.[5] Unit 1 of the project was connected to the grid in September 2013 in an initial sync testing.[6] The facility formally opened on February 13, 2014,[1] and it is currently the world's largest solar thermal power station.[7][8]

The project was developed by BrightSource Energy and Bechtel.[9] It cost $2.2 billion; the largest investor in the project is NRG Energy, a power generating company based in Princeton, New Jersey, that has contributed $300 million. Google has contributed $168 million.;[10] the U.S. government provided a $1.6 billion loan guarantee,[11] and the plant is built on public land. In 2010, the project was scaled back from the original 440 MW design, to avoid building on the habitat of the desert tortoise.[12]

In November 2014, Associated Press reported that the plant was producing only "about half of its expected annual output". The California Energy Commission issued a statement blaming this on "clouds, jet contrails and weather".[13] Performance improved considerably in 2015 — to about 650 GW·h, but ownership partner NRG Energy said in its November quarterly report that Ivanpah would likely not meet its contractual obligations to provide power to PG&E during the year, raising the risk of default on its Power Purchase Agreement.[14] PG&E contracted to receive 640 GW·h/year from Units 1 and 3, while SCE is supposed to receive 336 GW·h from Unit 2,[15] for which they pay about $200/MW·h (20¢/kW·h).[14] In March 2016, PG&E agreed not to declare the plant in default for at least four months, in return for "an undisclosed sum" from the owners.[16]

Description

Aerial photograph of Ivanpah Solar Power Facility
Power tower #2 of the Ivanpah Solar Electric Generating System under construction. The heliostat mirrors on the truck are awaiting installation.
View of Ivanpah Solar Electric Generating System from Yates Well Road. The Clark Mountain Range can be seen in the distance.
Ivanpah Solar Electric Generating System with all three towers under load, Feb 2014. Taken from I-15.

The Ivanpah Solar Electric Generating System consists of three solar thermal power plants on a 4,000 acres (1,600 ha) tract of public land near the Mojave Desert and the California—Nevada border in the Southwestern United States[17] near Interstate 15 and north of Ivanpah, California.[18] The site is visible from adjacent Mojave National Preserve, Mesquite Wilderness, and Stateline Wilderness.[18]

The facility consists of fields of heliostat mirrors focusing sunlight on receivers located on centralized solar power towers. The receivers generate steam to drive specially adapted steam turbines. For the first plant, the largest ever fully solar-powered steam turbine-generator set was ordered, using a 123 MW Siemens SST-900 single-casing reheat turbine.[19] Besides steam-turbine generators Siemens supplied instrumentation and control systems.[20] Final approval was gained in October 2010.[21] On October 27, 2010, California Governor Arnold Schwarzenegger, Interior Secretary Ken Salazar, and other dignitaries gathered in the Mojave Desert to officially break ground on the project.[5] The project generated controversy because of the decision to build it on ecologically intact desert habitat.[22]

The project has received a $1.6 billion loan guarantee from the U.S. Department of Energy.[23] The total cost of the project is about $2.18 billion.[24] The facility has contracts to sell about two-thirds of the power generated at Ivanpah to PG&E, and the rest to SCE.[25][26][27]

The largest investor in the project is NRG Energy, a generating company based in Princeton, N.J., that has put in $300 million.[10] The project has also received an investment of $168 million from Google,[28] but in November 2011, Google announced that they would no longer invest in CSP due to the rapid price decline of photovoltaic systems, and stopped its research on the project.[29][30][10]

Awards

In August 2014, Ivanpah was awarded the "Plant of the Year" award from POWER Magazine.[31] In February 2012, Ivanpah was awarded the CSP (Concentrating Solar Power) Project of the Year by Solar Power Generation USA.[32]

Power towers

The facility's three towers.

The Ivanpah plants use BrightSource Energy's "Luz Power Tower 550 technology" (LPT 550):

The LPT 550 solar system produces electricity the same way as traditional power plants – by creating high temperature steam to turn a turbine. BrightSource uses thousands of mirrors called heliostats to reflect sunlight onto a receiver being developed by Riley Power Inc. filled with water that sits atop a tower. When the sunlight hits the receiver, the water inside is heated and creates high temperature steam. The steam is then piped to a conventional turbine, which generates electricity.[27]

Additionally, "the power towers have 'receiver units' at their top on which the mirror fields focus their reflected light. During operation, these receiver units become extremely hot, such that they glow and appear brightly lit.... Because they are high above the ground, these glowing receiver units will be a visible distraction to persons at many of the KOPs [Key Observation Points], including travelers utilizing I-15."[18]

According to the State of California Energy Resources Conservation and Development Commission Opening Briefs regarding this project, "the project itself is visually imposing. It would cover roughly 4,000 acres (1,600 ha), most of which would be covered with mirror fields. The panoramic expanse of mirror arrays would present strong textural contrast with the intact, natural character of the desert floor [and] would rise to a height of roughly 459 feet [140 m]; an additional 10 to 15 feet [3–5 m] above that height would consist of lighting to meet Federal Aviation Administration (FAA) requirements."[18]

  • Ivanpah Solar Power Facility Online
    Ivanpah Solar Power Facility Online
  • Ivanpah's eastern tower online. Note the sunlight glare on either side of the boiler.
    Ivanpah's eastern tower online. Note the sunlight glare on either side of the boiler.
  • One of the three towers of the Ivanpah Solar Power Facility.
    One of the three towers of the Ivanpah Solar Power Facility.
  • A severely underexposed close-up of one of the boilers.
    A severely underexposed close-up of one of the boilers.

Fossil fuel consumption

The plant requires burning natural gas each morning to get the plant started. 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."[33] On August 27, 2014, the State of California approved Ivanpah to increase its annual natural gas consumption from 328 million cubic feet of natural gas, as previously approved, to 525 million cubic feet.[34] In 2014, the plant burned 867,740 million BTU of natural gas emitting 46,084 metric tons of carbon dioxide, which is nearly twice the pollution threshold at which power plants and factories in California are required to participate in the state’s cap and trade program to reduce carbon emissions.[35] If that gas had been used in a conventional fossil fuel plant, it would have generated nearly 124,000 MW·h of electrical energy. That is enough to power the annual needs of 20,660 Southern California homes.[36] Ivanpah used that gas plus solar energy to produce 524,000 MW·h of electrical energy (more than four times that of the referenced conventional plant), all while operating at well below its expected output. 2015 showed higher production numbers, with Q1 increases of 170% over the same time period in 2014.[15]

In 2015 the natural gas consumption had decreased to 564,814 million BTU, while the total energy output had increased to 652,300 MW·h.[37]

Ivanpah Solar uses two Rentech Type-D water tube boilers. The California Energy Resources Conservation and Development Commission approved for each a stack "130 feet high and 60 inches in diameter" and consumption of 242,500 ft3/h of fuel.[38]

Economic impact

BrightSource estimated that the Ivanpah facility would involve some 1,000 jobs at the peak of construction, 86 permanent jobs, and total economic benefits of $3 billion.[25][27]

Elected San Bernardino County Supervisor Brad Mitzelfelt, who represents most of the California Mojave Desert stated that the "project would create jobs for mostly Las Vegas and electricity for mostly San Francisco".[39]

The project received a $1.6 billion loan guarantee from the United States Department of Energy.[40] The estimated construction costs for the project ($5,561.00 per KW) fall between the construction costs for coal and nuclear power plants, according to Synapse Energy Economics,[41][42] but this does not account for the less favorable capacity factor of solar power.

It was reported in November 2014 that the investors in the plant were applying for a $539 million federal grant to pay off their federal loan.[11]

Performance

In June 2015, The Wall Street Journal reported: "15 months after starting up, the plant is producing just 40% of [its expected more than a million megawatt-hours of electricity each year], according to data from the U.S. Energy Department.[43]" Performance improved dramatically in the second year, as CleanTechnica reported regarding units 1 and 3 that "In 2015, PG&E customers received about 97% of Ivanpah’s contracted electrons, which is a massive improvement over its first year.[44]"

The steam plant is designed for 28.72% gross efficiency.[3]

The local irradiance near this area is about 7.4  kW·h/m2/day[45][46] (annual average) for a total solar energy flow in the visible spectrum of 2.717 MW·h/m2 yearly.

A claimed capacity factor of 31.4%[46] implies that the plant will operate for 365 days × 24 hours × 31.4% = 2751 hours per year. At 377 MW (net nameplate capacity) constant power, this means a generation of 377 MW × 2751 h/y = 1,037,127 MW·h/y rounding up to 1.04 TWh/y.

One heliostat mirror is a 75.6 square feet (7.02 m2) reflecting surface,[47] for a total of 151.2 square feet (14.05 m2) per heliostat. Total plant heliostat reflecting surface results in 173,500 heliostats × 14.05 m2/heliostat = 2,437,144 m2. Based on irradiance, the intercepted solar energy flow is 2.717 MW·h/m2/year × 2,437,144 m2 = 6,621,720 MW·h yearly. Thermal yield, after taking into consideration reflection, transmission, radiation and absorption losses, is about 55%, resulting in a thermal power input to the steam turbines of 6,621,720 MW·h × 55% = 3,641,946 MW·hth. Resulting expected energy output is 3,641,946 MW·hth × 28.72% efficiency = 1,045,967 MW·h/y, rounding up to 1.05 TWh/y. Lack of published performance data has caused speculation that the plant is not meeting expectations.[48]

May 2016 industrial accident

A small fire was reported on 19 May 2016 when misaligned mirrors reflected sunlight into a level of Unit 3 tower not designed to collect power, shutting down the tower for repairs.[49] As another of the three power-generating units was already offline for scheduled maintenance, the plant was left with only one third of its installation functional.[49] Unit 3 resumed operation on June 8, 2016, within three weeks of the incident. All three units seemed back in operation by June 20, 2016. Solar thermal electricity production in California peaked at 703 MW on that day,[50] up from 452 MW on June 7 when two units were offline.[51]

Environmental impacts

The Ivanpah installation was estimated, before operations started, to reduce carbon dioxide emissions by more than 400,000 tons annually. It was designed to minimize impacts on the natural environment compared to some photovoltaic solar facilities because the use of heliostats does not require as much grading of the land.[32] However, the facilities are fenced off to keep some terrestrial wildlife out, and initial studies indicate that birds face the risk of collision with the heliostat mirrors or from burning in solar flux created by the mirror field.[52][53]

In 2012, the National Parks Conservation Association (NPCA) issued a report on the project, citing water concerns, damage to visual resources, and impacts on important desert species. In order to conserve scarce desert water, LPT 550 uses air-cooling to convert the steam back into water. Compared to conventional wet-cooling, this results in a 90 percent reduction in water usage. The water is then returned to the boiler in a closed process.[27]

Another potential issue that has been reported is the effect of mirror glare on airplane pilots.[54]

Desert tortoise

The Ivanpah Solar power project was built on six square miles of public land in the south central Mojave Desert.[55] Project construction was temporarily halted in the spring of 2011 due to the suspected impacts on desert tortoises.[56] Construction resumed when the United States Fish and Wildlife Service (USFWS) found the project was not likely to jeopardize the endangered desert tortoise.[57] BrightSource also installed fencing to keep wildlife out of the area.[58] In 2010, the project was scaled back from the original 440 MW design, to avoid building on the habitat of the desert tortoise.[12]

Many desert tortoises found on the site were relocated to other parts of the Mojave Desert; however, environmentalists raised concerns that relocated tortoises were more likely to die due to the stresses involved.[59][60]

Birds

During the trial of the plant in September 2013, 34 dead birds were found at the plant, 15 of which had heavily burned feathers, which staff at the plant referred to as "streamers" because they were burned in flight by the intense radiation from the heliostat mirrors.[61] From February through June 2014, a team of biologists monitoring the number of bird deaths reported a total of 290.[62]

According to a USFWS report in April 2014, 141 birds, including peregrine falcon, barn owl and yellow-rumped warbler were collected at Ivanpah in October 2013 and 47 of the deaths were attributed to solar flux.[63] According to a report by the Associated Press, "Ivanpah might act as a 'mega-trap' for wildlife, with the bright light of the plant attracting insects, which in turn attract insect-eating birds that fly to their death in the intensely focused light rays."[64] Possible bird kill mitigation strategies are being considered, such as using proven, environmentally safe technologies such as avian radars and LRADs to keep birds away from the site, covering ponds to discourage waterbirds from loitering, and clearing additional land around the plant to make it less attractive and more visible to birds in flight.[61][65][66][67]

In April 2015, "biologists working for the state estimated that 3,500 birds died at Ivanpah in the span of a year, many of them burned alive while flying through a part of the solar installment where air temperatures can reach 1,000 degrees Fahrenheit [540 °C]", reported the Wall Street Journal.[68]

In late 2015, Brightsource released the results of the first full year of monitoring bird and bat deaths at the Ivanpah solar plant. The company reported that during a year of study supervised by the California Division of Wildlife, the number of observed bird deaths, adjusted upward to account for inefficiencies of the carcass-counting, arrived at an estimated 3,500 bird deaths per year caused by the Ivanpah solar plant. The Ivanpah plant has taken steps to further reduce bird deaths.[69]

The initial reports of high avian casualties have been disputed ever since initial reports surfaced: in September 2014, for example, Renewable Energy World suggested "With its claim of 28,000 dead birds from Ivanpah, the Associated Press syndicated a story on every front page in America, spreading alarm about concentrated solar power (CSP) plants, which was not grounded in facts, but on one opponent's speculation."[70]

Production

Ivanpah Solar Electric production is as follows (values in megawatt-hours MW·h).

Ivanpah 1

Net electricity production [MW·h][71]
Year Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Total
2014 5,632 4,460 4,946 9,130 15,879 23,722 12,277 16,807 19,743 17,455 15,993 5,922 151,966
2015 4,448 16,471 20,010 25,281 12,380 25,126 19,575 23,404 21,333 11,813 16,230 13,904 209,975
2016 7,599 23,686 18,427 13,284 26,006 89,002
Total 450,943

Ivanpah 2

Net electricity production [MW·h][72]
Year Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Total
2014 2,167 1,304 5,604 9,596 13,020 15,825 14,350 12,812 14,446 18,157 15,350 6,632 129,263
2015 6,909 8,915 19,585 24,364 17,243 26,206 18,953 23,900 22,628 12,477 22,222 15,642 219,044
2016 10,070 17,615 19,436 5,626 0 52,747
Total 401,054

Ivanpah 3

Net electricity production [MW·h][73]
Year Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Total
2014 2,686 3,866 9,409 6,107 15,885 24,728 9,340 14,451 9,562 20,401 15,834 5,587 137,856
2015 10,531 4,887 16,748 25,659 18,333 26,202 23,153 25,502 22,186 12,681 22,022 15,452 223,356
2016 7,770 25,953 20,546 19,539 17,430 91,238
Total 452,450

Ivanpah Total

Net electricity production [MW·h]
Year Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Total
2014 10,485 9,630 19,959 24,833 44,784 64,275 35,967 44,070 43,751 56,013 47,177 18,141 419,085
2015 21,888 30,273 56,343 75,304 47,956 77,534 61,681 72,806 66,147 36,971 60,474 44,998 652,375
2016 25,439 67,254 58,409 38,449 43,436 232,987
Total 1,304,447

Ivanpah was advertised as designed to produce 940,000 MW·h of electricity per year, based on its nameplate capacity and assumed capacity factor.[4] In its second year of operation, Ivanpah's production of 652,375 MW·h was 69.4 percent of this value, ramping up from 44.6 percent in the first year.

See also

References

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  2. ^ "Update from Ivanpah – May 2013". May 22, 2013. Retrieved July 22, 2013. Ivanpah Project Is More Than 92 Percent Complete
  3. ^ a b c "Ivanpah Solar Electric Generating System". National Renewable Energy Laboratory (NREL). Retrieved 22 March 2016.
  4. ^ a b "Ivanpah". Loan Programs Office (LPO), Department of Energy (DOE). March 2015. Retrieved 2 May 2016.
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  8. ^ "World's Largest Solar Thermal Power Project at Ivanpah Achieves Commercial Operation", NRG press release, February 13, 2014.
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  13. ^ Huge solar plant lags in early production, Associated Press, November 17, 2014
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  17. ^ Walsh, Bryan (24 June 2013). "Tower of Power". Time (magazine) (paper). pp. Business 1–4.
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  19. ^ Siemens press release Siemens to supply 123 MW steam turbine-generator set for solar thermal power plant in California
  20. ^ Siemens. "Energy efficiency. Rethinking the energy system here in the U.S." Usa.siemens.com. Retrieved 28 November 2014.
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  29. ^ Google cans concentrated solar power project Reve, 24 Nov 2011. Accessed: 25 Nov 2011.
  30. ^ Google Renewable Energy Cheaper than Coal (RE<C), Google. Accessed: 30 November 2011.
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  32. ^ a b "The Ivanpah solar energy project named Concentrating Solar Power project of the year". REVE. February 22, 2012.
  33. ^ "High-Tech Solar Projects Fail to Deliver". One big miscalculation was that the power plant requires far more steam to run smoothly and efficiently than originally thought, according to a document filed with the California Energy Commission. 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 help from fossil fuels to get the plant humming every morning.
  34. ^ http://docketpublic.energy.ca.gov/PublicDocuments/07-AFC-05C/TN203064_20140915T132932_ISEGS_Order_Approving_Petition_to_Amend.pdf
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  36. ^ http://www.physics.uci.edu/~silverma/actions/HouseholdEnergy.html
  37. ^ Energy Information Administration. "Electricity data browser - Ivanpah 3". Electricity Data Browser. Retrieved January 27, 2016.
  38. ^ http://www.energy.ca.gov/sitingcases/ivanpah/compliance/2013-03-13_CEC_Order_12-0213-8_Approving_a_Petition_to_Modify_Air_Quality_Conditions_of_Certification_TN-69908%20.pdf
  39. ^ Zook, David (November 16, 2009). "County Supervisor, Concerned by BrightSource Mega Solar Project Impacts, Calls for Full Review". Best Syndication News. Retrieved 2011-04-15.
  40. ^ "DOE Finalizes $1.6 Billion Loan Guarantee for BrightSource Energy". U.S. Department of Energy Loans Program Office. U.S. Department of Energy. 11 April 2011. Retrieved 28 Mar 2014.
  41. ^ Schlissel, David; Allison Smith; Rachel Wilson (July 2008). Coal-Fired Power Plant Construction Costs (PDF) (Technical report). Synapse Energy Economics, Inc. p. 8.
  42. ^ Schlissel, David; Bruce Biewald (July 2008). Nuclear Power Plant Construction Costs (PDF) (Technical report). Synapse Energy Economics, Inc. p. 9.
  43. ^ Sweet, Cassandra. "High-Tech Solar Projects Fail to Deliver". The $2.2 billion Ivanpah solar power project in California's Mojave Desert is supposed to be generating more than a million megawatt-hours of electricity each year. But 15 months after starting up, the plant is producing just 40% of that, according to data from the U.S. Energy Department
  44. ^ Susan, Kraemer. "How Ivanpah Raised Its Performance In Its Second Year". CleanTechnica. Retrieved 17 June 2016.
  45. ^ "U.S. Solar Radiation Resource Maps". NREL. Retrieved 4 March 2014.
  46. ^ a b "Ivanpah Solar Electric Generating Station (ISEGS) Case Study". CleanEnergy ACTION PROJECT. Retrieved 4 March 2014.
  47. ^ "Ivanpah Solar Electric Generating System". Retrieved 18 March 2014.
  48. ^ "Ivanpah Solar Project Quietly Goes Online -- Or Does It?". KCET. 30 January 2014. Retrieved 4 March 2014.
  49. ^ a b Staff (19 May 2016). "Mirrors blamed for fire at world's largest solar plant". The Big Story. Associated Press. Retrieved 23 May 2016.
  50. ^ "Renewables Watch for Operating Day: Monday, June 20, 2016" (PDF). California ISO Renewables Watch. Retrieved 21 June 2016.
  51. ^ "Renewables Watch for Operating Day: Tuesday, June 07, 2016" (PDF). California ISO Renewables Watch. Retrieved 21 June 2016.
  52. ^ "California Energy Commission" (PDF). Compliance Docket - Ivanpah Solar. California Energy Commission. Retrieved 9 September 2014.
  53. ^ "Avian & Bat Monitoring Plan" (PDF). California Energy Commission - Ivanpah Solar compliance. California Energy Commission. Retrieved 9 September 2014.
  54. ^ DuHamel, Jonathan (22 August 2014). "Ivanpah solar plant wants to burn more natural gas".
  55. ^ Danelski, David (April 16, 2015). "SOLAR POWER: Inland plants boost state to No. 1". The Press-Enterprise. Riverside, California.
  56. ^ "Ivanpah Temporary Suspension Notice". Federal Government. Retrieved 3 December 2011.
  57. ^ [1] Template:Wayback
  58. ^ California Energy Commission. "Final Staff Assessment of the Ivanpah Solar Electric Generating System". CEC Documents Page. CEC. Retrieved 3 December 2011.
  59. ^ Danelski, David (8 October 2011). "First displaced tortoise released". Press-Enterprise. Retrieved 3 December 2011.
  60. ^ Basin and Range Watch. "Desert Tortoise Recovery: Science and Politics Clash". Retrieved 3 December 2011.
  61. ^ a b Kaufmann, K. (2013-11-13). "Palen project raises concerns across Coachella Valley". mydesert.com. Retrieved 2014-02-17.
  62. ^ "Preventing Bird Deaths at Solar Power Plants, Part 1". Renewable Energy World. Retrieved 28 November 2014.
  63. ^ "Palen Solar Power Project - Compliance" (PDF). Docketpublic.energy.ca.gov. Retrieved 28 November 2014.
  64. ^ Knickmeyer, Ellen (18 August 2014). "Emerging solar plants in Mojave Desert scorch birds in mid-air". The Sun. San Bernardino County Sun. The Associated Press.
  65. ^ K Kaufmann (7 April 2014). "Birds going up in smoke at Ivanpah solar project". The Desert Sun. Retrieved 28 November 2014.
  66. ^ Peck, Morgen (2014-08-20). "Ivanpah Solar Power Tower Is Burning Birds". IEEE Spectrum. Retrieved 2014-12-07.
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  68. ^ "High-Tech Solar Projects Fail to Deliver". Once built, U.S. government biologists found the plant's superheated mirrors were killing birds. In April, biologists working for the state estimated that 3,500 birds died at Ivanpah in the span of a year, many of them burned alive while flying through a part of the solar instalment where air temperatures can reach 1,000 degrees Fahrenheit.
  69. ^ Peter Fairley, Solar towers don't seem to be the bird-destroyers once thought, IEEE Spectrum, 2 Nov. 2015.
  70. ^ Kraemer, Susan (3 September 2014). "For the Birds: How Speculation Trumped Fact at Ivanpah". renewableenergyworld.com.
  71. ^ Energy Information Administration. "Electricity data browser - Ivanpah 1". Electricity Data Browser. Retrieved June 21, 2016.
  72. ^ Energy Information Administration. "Electricity data browser - Ivanpah 2". Electricity Data Browser. Retrieved June 21, 2016.
  73. ^ Energy Information Administration. "Electricity data browser - Ivanpah 3". Electricity Data Browser. Retrieved June 21, 2016.

External links

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