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Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)

Editor
Y. Tao
Y. Tao
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C. Ma
C. Ma
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ISBN:
9780791802908
No. of Pages:
1200
Publisher:
ASME Press
Publication date:
2009

This paper is a summary of the long term performance of three high concentration photovoltaic systems since their installation in March of 2006. The performance of the systems was determined based upon a weather station located on site which has sensors that measure direct normal radiation, global horizontal radiation, ambient temperature, humidity, wind speed, and wind direction. The paper also includes challenges that were encountered during the operation of the systems and solutions to those challenges.

In this presentation, a solar energy powered thermodynamic cycle using supercritical CO2 for combined production of electricity and thermal energy is introduced. The technology utilizes evacuated solar collectors to convert CO2 into medium-temperature supercritical state, used to drive a turbine and thereby produce mechanical energy and hence electricity. The system also recovers thermal energy, which could be used for refrigeration, air conditioning, hot water supply, etc. in domestic or commercial buildings. Experimental prototype and tests have been constructed and carried out. It was found that CO2 is efficiently converted into high-temperature supercritical state. Electricity and hot water can be generated from the present system. The experimental results show that the solar energy powered Rankine cycle using CO2 works stably in a trans-critical region. In addition, detailed experimental results and science topics related to the technology will be presented.

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