Small hybrid solar power system |
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| Affiliation: | 1. Laboratory for Industrial Energy Systems (LENI), Institute of Energy Sciences, Swiss Federal Institute of Technology of Lausanne (EPFL), CH1015 Lausanne, Switzerland;2. COGENER, Science Park, Swiss Federal Institute of Technology of Lausanne, CH1015 Lausanne, Switzerland;1. Department of Mechanical Engineering, KFUPM, PO Box 925, Dhahran 31261, Saudi Arabia;2. Department of Mechanical Engineering, KFUPM, PO Box 4, Dhahran 31261, Saudi Arabia;1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;2. Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;3. Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China;4. Institute University of Chinese Academy of Sciences, Beijing 100049, China;1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;2. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy of Ministry of Education, Tianjin University, Tianjin 300072, China;3. Thermodynamics Laboratory, University of Liège, Campus du Sart Tilman, B49, B-4000 Liège, Belgium |
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| Abstract: | This paper introduces a novel concept of mini-hybrid solar power plant integrating a field of solar concentrators, two superposed Organic Rankine Cycles (ORC) and a (bio-)Diesel engine. The Organic Rankine Cycles include hermetic scroll expander-generators1 and the sun tracking solar collectors are composed of rows of flat mirror bands (CEP) arranged in a plane, that focus the solar energy onto a collector tube similar to those used in SEGS plants in California. Waste heat from both the exhaust gases and the block cooling of the thermal engine are also heat sources for the ORCs. Such units meet electricity, cooling and pumping needs of remote settlements. The thermal engine guarantees a minimum level of both power and heat availability at night or during cloudy periods. Laboratory tests, made with the superposed ORCs only, confirmed adequate operational characteristics with good performances over a broad range of conditions. A few preliminary tests on the site of the solar power plant when coupled with the engine confirmed a reasonable behavior and the interest of the concept even at part load or during sharp variations of the thermal supply. |
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