Thermal and economic performance analysis of zeotropic mixtures for Organic Rankine Cycles
Thermal and economic performance analysis of zeotropic mixtures for Organic Rankine Cycles
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DOI：
10.1016/j.applthermaleng.2015.11.083
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发表时间：
2016-03-05
影响因子：
6.4
通讯作者：
Yu, Lijun
中科院分区：
文献类型：
--
作者：
Wu, Yuandan;Zhu, Yadong;Yu, Lijun
为了揭示有机兰金循环（ORC）中混合物的性能，本文使用热空气作为热资源介绍了兽人的性能。研究的二核混合物是R227EA/R245FA，丁烷/R245FA和RC318/R245FA。计算第一定律效率，第二定律的效率，二次法律损失分布和股型混合物流体的净功率输出，并将其与相应的纯流体进行比较。通过使用计数器流热交换器，根据UA单位的净功率输出来分析系统的经济性能。结果表明，当冷却水的温度差位于冷凝器中的沸点混合物的温度滑动附近时，可以实现更好的热性能。与相应的纯流体循环相比，周期效率，弹性效率和净功率输出增加，但UA单位的净功率输出却降低；换句话说，该系统的经济表现在某种程度上变得更糟。 （c）2016 Elsevier Ltd.保留所有权利。
In order to reveal the performance of mixture in Organic Rankine Cycle (ORC), this paper presents the performance of ORC using hot air as heat resource. The zeotropic mixture fluids studied are R227ea/R245fa, Butane/R245fa and RC318/R245fa. The first law efficiency, the second law efficiency, exergy loss distributions and net power output of zeotropic mixture fluids are calculated and compared with corresponding pure fluids. By using the counter flow heat exchangers, the system's economic performance is analyzed based on the net power output per unit UA. The result indicates that better thermal performance can be achieved when the temperature difference of cooling water is near the temperature glide of zeotropic mixture in the condenser; cycle efficiency, exergy efficiency and net power output increase compared to corresponding pure fluid cycles, but the net power output per unit UA decreases; in other words, the economic performance of this system becomes worse in some degree. (C) 2016 Elsevier Ltd. All rights reserved.