A combined power and ejector refrigeration cycle for low temperature heat sources
A combined power and ejector refrigeration cycle for low temperature heat sources
复制标题
DOI：
10.1016/j.solener.2010.02.001
复制
发表时间：
2010-05
期刊：
影响因子：
6.7
通讯作者：
B. Zheng;Y. Weng
中科院分区：
文献类型：
--
作者：
B. Zheng;Y. Weng
本文研究了一种用于低温热源的动力-喷射制冷联合循环。所提出的循环结合了有机朗肯循环和喷射制冷循环。喷射器由来自涡轮机的排气驱动，以同时产生动力和制冷。以R245 fa为工质，对循环性能进行了模拟分析。当发生温度为395 K、冷凝温度为298 K、蒸发温度为280 K时，热效率为34.1%，有效效率为18.7%，火用效率为56.8%。模拟结果表明，该循环具有很大的制冷潜力，大部分损失发生在喷射器。
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 395K, a condensing temperature of 298K and an evaporating temperature of 280K. Simulation results show that the proposed cycle has a big potential to produce refrigeration and most exergy losses take place in the ejector.