A combined power and ejector refrigeration cycle for low temperature heat sources |
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Authors: | B Zheng YW Weng |
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Affiliation: | School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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Abstract: | A combined power and ejector refrigeration cycle for low temperature heat sources is under investigation in this paper. The proposed cycle combines the organic Rankine cycle and the ejector refrigeration cycle. The ejector is driven by the exhausts from the turbine to produce power and refrigeration simultaneously. A simulation was carried out to analyze the cycle performance using R245fa as the working fluid. A thermal efficiency of 34.1%, an effective efficiency of 18.7% and an exergy efficiency of 56.8% can be obtained at a generating temperature of 395 K, a condensing temperature of 298 K and an evaporating temperature of 280 K. Simulation results show that the proposed cycle has a big potential to produce refrigeration and most exergy losses take place in the ejector. |
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Keywords: | Combined power and refrigeration Organic Rankine cycle Ejector refrigeration cycle Low temperature heat sources |
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