Nevada Solar One

Nevada Solar One is a concentrated solar power plant, with a nominal capacity of 64 MW and maximum steam turbine power output up to 72 MW net (75 MW gross), spread over an area of 400 acres (160 ha). The projected CO₂ emissions avoided is equivalent to taking approximately 20,000 cars off the road. The project required an investment of $266 million USD,[1] and the project officially went into operation in June 2007.[2] Electricity production is estimated to be 134 GWh (gigawatt hours) per year.[3]

Nevada Solar One
Photograph of Nevada Solar One, with the Las Vegas Valley beyond the mountains behind it
Country	United States
Location	Eldorado Valley, Boulder City, Nevada
Coordinates	35°48′N 114°58.6′W
Status	Operational
Construction began	February 2006
Commission date	June 2007
Construction cost	$266 million
Owner(s)	Acciona Energy
Solar farm
Type	CSP
CSP technology	Parabolic trough
Site resource	2,606 kWh/m^2/yr
Site area	400 acres (162 ha)
Power generation
Units operational	1 x 75 MWe (gross)
Make and model	Siemens SST-700
Nameplate capacity	72 MW
Capacity factor	18.4% (2014-2018)
Annual net output	115.9 GW·h
External links
Website	nevada solar one
Commons	Related media on Commons

In 2007, when the plant came on line, it was the second solar thermal energy (STE) power plant built in the United States in more than 16 years,[4] and in 2007, the largest STE plant built in the world since 1991.[5] It is located in Eldorado Valley in the southwest fringe of Boulder City, Nevada, and was built in that city's Energy Resource Zone, which requires renewable generation as part of plant development permits; Nevada Solar One was approved as part of Duke Energy's larger El Dorado Energy project that built 1 GW of electrical generation capacity. The solar trough generation was built by Acciona Solar Power, a partially owned subsidiary of Spanish conglomerate Acciona Energy.[6] Lauren Engineers & Constructors (Abilene, TX) was the EPC contractor for the project.[7] Acciona purchased a 55 percent stake in Solargenix (formerly Duke Solar) and Acciona owns 95 percent of the project.[8] Nevada Solar One is unrelated to the Solar One power plant in California.

History

In 2006, located 30 miles (48 km) north of Tucson, Arizona Public Service's Saguaro Solar Facility opened, with 1 MW of electrical generation capacity.[9] Nevada Solar One went online for commercial use on June 27, 2007. It uses similar technology and was constructed over a period of 16 months. The total project site is approximately 400 acres (1.6 km²; 0.63 sq mi), while the solar collectors cover 300 acres (1.2 km²).

Technology

Nevada Solar One uses proprietary technology to track the sun’s location and concentrate its rays during peak demand hours. The plant uses 760 parabolic trough concentrators with more than 182,000 mirrors that concentrate the sun’s rays onto more than 18,240 receiver tubes placed at the focal axis of the troughs and containing a heat transfer fluid (solar receivers). Fluid that heats up to 735 °F (391 °C) flows through these tubes and is used to produce steam that drives a Siemens SST-700[10] steam turbine, adapted to the specific requirements of the CSP technology,[11] which is connected to a generator to produce electricity.

The mirrors are manufactured by Flabeg AG in Germany.[12] In contrast to the power tower concentrator concept that California's original Solar One project uses. The specially coated tubes, made of glass and steel, were designed and produced by Solel Solar Systems[13] as well as by Schott Glass in Germany.[14] Motion control was supplied by Parker Hannifin, from components by Ansco Machine Company.

Solar thermal power plants designed for solar-only generation are well matched to summer noon peak loads in areas with significant cooling demands, such as the southwestern United States. Using thermal energy storage systems, solar thermal operating periods can be extended to meet base load needs.[15] Given Nevada's land and sun resources the state has the theoretical ability to have more than 600 GW of electrical generation capacity using solar thermal concentrators like those used by Nevada Solar One.[16] It has been proposed that massive expansion of solar plants such as Nevada Solar One has the potential to provide sufficient electricity to power the entire United States.[17]

Parabolic concentrator facilities have been successfully operating in California's Mojave Desert commercially since 1984 with a combined generating capacity of 354MW from the Solar Energy Generating Systems. About 30 parabolic trough power plants are operating in Spain (see Solar power in Spain) and more are in construction or proposed, and two 110 MW plants in Israel.[18][19]

Production

Nevada Solar One's production is as follows (values in GW·h).[20]

Year	Solar	Fossil	Total
2007	41.21	0.38	41.59
2008	122.69	0.91	123.31
2009	120.65	2.43	123.07
2010	133.00	1.16	134.16
2011	128.26	1.99	130.26
2012	128.94	1.39	130.33
2013	112.79	2.31	115.10
2014	116.23	2.58	118.80
2015	105.65	2.14	107.79
2016	116.89	2.24	119.13
2017	118.03	2.58	120.60
2018	110.38	2.57	112.95

Fossil backup, night time preservation, and morning pre-heating, is provided by natural gas and provides up to 2% of total output.

Solar generation (MW·h) of Nevada Solar One [21]

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Total
2007						1,876	8,827	10,251	10,186	6,075	3,101	896	41,212
2008	1,942	4,837	11,696	14,759	14,868	19,308	13,935	12,987	12,785	9,141	4,207	2,222	122,687
2009	2,239	3,971	11,982	13,920	16,096	11,638	13,839	16,117	13,314	8,754	5,838	2,940	120,648
2010	2,147	4,143	10,349	13,261	18,850	20,674	14,863	17,989	16,220	7,186	5,476	1,842	133,000
2011	3,137	6,370	8,772	14,625	16,516	20,698	13,698	16,732	10,752	9,420	4,333	3,210	128,263
2012	2,740	5,814	9,719	13,152	19,733	21,710	14,140	12,159	12,798	9,679	5,003	2,288	128,935
2013	2,641	7,023	10,355	14,613	17,063	18,402	10,552	10,166	5,149	9,382	4,142	3,302	112,790
2014	3,336	4,976	10,120	12,321	15,501	19,698	12,011	11,987	12,007	8,145	4,609	1,516	116,227
2015	2,051	6,375	9,993	13,982	9,993	15,337	12,565	11,308	9,221	6,684	5,624	2,519	105,652
2016	1,693	7,797	8,403	8,547	16,628	17,835	17,669	12,517	12,274	6,715	4,924	1,885	116,887
2017	2,560	3,876	10,683	13,305	16,753	19,672	10,770	13,111	10,236	9,839	3,908	3,312	118,025
2018	284	2,947	7,996	13,492	15,677	19,517	12,645	11,296	12,636	7,310	4,474	2,105	110,379
Total													1,354,705

See also

• Copper Mountain Solar Facility
• Dish Stirling
• List of solar thermal power stations
• Renewable energy in the United States
• Renewable portfolio standard
• Solar power in Nevada
• Solar power plants in the Mojave Desert
• Solar power tower
• Solar thermal energy

References

1. Solar Steam at Nevada Solar One
2. ACCIONA’s Nevada Solar One
3. Technology News Daily. Nevada Solar One.
4. "Utility-Scale Solar Plant Goes Online in Nevada". June 4, 2007. Retrieved February 9, 2020.
5. "Arizona Utility to Buy Power from a 280-Megawatt Solar Power Plant". energyvortex.com. Archived from the original on June 16, 2008.
6. "Acciona Energía website". Retrieved 2008-06-17.
7. "Nevada's Largest Solar Power Plant Opens". Southwest Contractor. June 2007. Retrieved 2009-08-01.
8. "ACCIONA invests 220 million euros in a solar thermal electric power plant in Nevada (USA)" (in Spanish). 2006-02-13. Archived from the original on 2007-09-28. Retrieved 2006-10-23.
9. Kryzanowski, Tony (2007). "Raising Arizona's renewable power". www.altenerg.com. enerG Magazine. Archived from the original on 31 March 2016. Retrieved 7 April 2019.
10. "Siemens website - steam turbines for CSP plants". Archived from the original on 2010-09-18. Retrieved 2010-07-01.
11. "Sun shines on solar power steam turbine generators". EngineerLive. Retrieved 2010-07-01.
12. Flabeg AG - solar power mirror installations
13. "Solel website". Retrieved 2008-06-17.
14. Schott AG - special glass tubing
15. Spain Pioneers Grid-Connected Solar-Tower Thermal Power Archived 2018-09-27 at the Wayback Machine p. 3.
16. Nevada Solar One Goes Online Archived 2007-05-23 at the Wayback Machine
17. Sunny Outlook: Can Sunshine Provide All U.S. Electricity?
18. Israeli company drives the largest solar plant in the world
19. NREL Concentrating Solar Power Projects with Operational Plants
20. Energy Information Administration. "Nevada Solar One, Annual". Electricity Data Browser. Retrieved June 28, 2015.
21. "Nevada Solar One, Monthly". Electricity Data Browser. Energy Information Administration. Retrieved March 8, 2017.

• PowerMag: Nevada Solar One, Boulder City, Nevada (12/15/2007)

External links

External image
Nevada Solar One from the air in 2008

• Acciona Energy North America's official site
• Largest solar power plant in a generation to be built in Nevada
• Solar Steam at Nevada Solar One