Analyzing the optimization of an organic Rankine cycle system for recovering waste heat from a large marine engine containing a cooling water system
Analyzing the optimization of an organic Rankine cycle system for recovering waste heat from a large marine engine containing a cooling water system
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DOI：
10.1016/j.enconman.2014.09.044
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发表时间：
2014-12
影响因子：
10.4
通讯作者：
Min-Hsiung Yang;R. Yeh
中科院分区：
文献类型：
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作者：
Min-Hsiung Yang;R. Yeh
在这项研究中，六种具有零臭氧消耗潜势和低全球变暖潜势的工质用于有机朗肯循环（ORC）系统，以回收大型船用柴油机缸套水的废热。通过热力学分析和有限温差传热法对ORC系统的热效率、总换热面积、目标参数和火用损失进行了计算。以ORC系统为研究对象，以系统的净功率与换热面积之比为最大目标参数，对系统的最佳蒸发温度和冷凝温度进行了研究，结果表明，在最佳目标参数评价中，R600a的性能最好，其次是R1234ze、R1234yf、R245fa、R245ca、和R1233zd在58 °C至68 °C的蒸发温度和35 °C至45 °C的冷凝温度下进行。提出了最佳运行温度和相应的热效率及火用损失。此外，还分析了进气温度对余热回收利用过程中的缸套水和ORC冷却水的影响。本文的结果与文献中的理论解和实验结果进行了验证，结果表明两者是一致的。
In this study, six working fluids with zero ozone depletion potential and low global warming potential are used in an organic Rankine cycle (ORC) system to recover waste heat from cylinder jacket water of large marine diesel engines. Thermodynamic analysis and a finite-temperature-difference heat-transfer method are developed to evaluate the thermal efficiency, total heat-exchanger area, objective parameter, and exergy destruction of the ORC system. The optimal evaporation and condensation temperatures for achieving the maximal objective parameter, the ratio of net power output to the total heat-transfer area of heat exchangers, of an ORC system are investigated.The results show that, among the working fluids, R600a performs the best in the optimal objective parameter evaluation followed by R1234ze, R1234yf, R245fa, R245ca, and R1233zd at evaporation temperatures ranging from 58 °C to 68 °C and condensation temperatures ranging from 35 °C to 45 °C. The optimal operating temperatures and corresponding thermal efficiency and exergy destruction are proposed. Furthermore, the influences of inlet temperatures on cylinder jacket water and cooling water in the ORC are presented for recovering waste heat. The results of this work were verified with theoretical solutions and experimental results in the literature and it was revealed that they were consistent with them.