DocumentCode :
3356553
Title :
Optimal Operating Temperature for Solar Thermal Power System
Author :
Lu JianFeng ; Ding Jing
Author_Institution :
Sch. of Eng., Sun Yat-Sen Univ., Guangzhou
fYear :
2009
fDate :
27-31 March 2009
Firstpage :
1
Lastpage :
4
Abstract :
Solar thermal power is currently one of the important trends and research hotspots of solar energy. In present paper, basic physical model is proposed to investigate the solar thermal power, and the operating temperature is optimized to maximize the electricity generating efficiency. As the incident energy flux rises, the wall temperature almost linearity increases, while the heat absorption efficiency will first increase and then decrease. The increasing of flow velocity will benefit the heat receiver performance by decreasing the wall temperature and increasing heat absorption efficiency. Since the heat loss of infrared radiation increases with the temperature, the heat convection flux and local absorption efficiency of the heat receiver will evidently decrease along the flow direction. As the operating temperature increases, the Carnot efficiency of the steam turbine cycle obviously increases, while the average absorption efficiency of heat receiver decreases, so the electricity generating efficiency will reach maximum at optimal operating temperature.
Keywords :
power systems; Carnot efficiency; heat receiver; optimal operating temperature; solar energy; solar thermal power system; steam turbine cycle; Electromagnetic wave absorption; Infrared heating; Linearity; Optical receivers; Power generation; Power system modeling; Power systems; Solar energy; Solar power generation; Temperature;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-2486-3
Electronic_ISBN :
978-1-4244-2487-0
Type :
conf
DOI :
10.1109/APPEEC.2009.4918569
Filename :
4918569
Link To Document :
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