Parametric optimization and comparative study of organic Rankine cycle (ORC) for low grade waste heat recovery
Parametric optimization and comparative study of organic Rankine cycle (ORC) for low grade waste heat recovery
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DOI：
10.1016/j.enconman.2008.10.018
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发表时间：
2009-03-01
影响因子：
10.4
通讯作者：
Gao, Lin
中科院分区：
文献类型：
--
作者：
Dai, Yiping;Wang, Jiangfeng;Gao, Lin
介绍了采用不同工质的有机朗肯循环低品位废热回收系统。研究了热力学参数对ORC性能的影响，并以火用效率为目标函数，采用遗传算法对ORC的热力学参数进行了优化。在相同的余热条件下，对不同工质的循环进行了最佳性能比较分析。结果表明，在将低品位废热转化为有用功方面，有机工质循环比水循环要好得多。R236EA循环的效率最高，在给定的余热条件下，在ORC系统中增加内部换热器并不能提高系统的性能。另外，对于饱和蒸气曲线斜率为非正的工质，在涡轮机入口为饱和蒸气时循环的性能最好。(c)2008年由Elsevier Ltd.出版
Organic Rankine cycles for low grade waste heat recovery are described with different working fluids. The effects of the thermodynamic parameters on the ORC performance are examined, and the thermodynamic parameters of the ORC for each working fluid are optimized with exergy efficiency as an objective function by means of the genetic algorithm. The optimum performance of cycles with different working fluids was compared and analyzed under the same waste heat condition. The results show that the cycles with organic working fluids are much better than the cycle with water in converting low grade waste heat to useful work. The cycle with R236EA has the highest exergy efficiency, and adding an internal heat exchanger into the ORC system could not improve the performance under the given waste heat condition. In addition, for the working fluids with non-positive saturation vapor curve slope, the cycle has the best performance property with saturated vapor at the turbine inlet. (c) 2008 Published by Elsevier Ltd.