Examination of the expander leaving loss in variable organic Rankine cycle operation
Examination of the expander leaving loss in variable organic Rankine cycle operation
复制标题
检查膨胀机在可变有机朗肯循环运行中留下的损失
DOI：
10.1016/j.enconman.2012.06.023
复制
发表时间：
2013
影响因子：
10.4
通讯作者：
Ji Jie
中科院分区：
文献类型：
--
作者：
Pei Gang;Li Yunzhu;Wang Dongyue;Ji Jie
有机朗肯循环(ORC)在低温下运行良好。它与蒸汽朗肯循环在膨胀过程中的流体热降和冷凝温度变化的反应中有很大的不同。在现有的基于ORC的能量转换方法中，通常忽略了膨胀机的剩余损耗。本文概述了该方法的不足之处。首先对膨胀机出口损失随冷凝温度、蒸发温度和入口压力的变化进行了理论分析。随后进行了实验测试。结果表明，与蒸汽朗肯循环不同的是，当冷凝温度从30℃变化到0℃时，使用R123或R245fa的ORC中的离开损失增加了约10倍，与热降相当。在进口温度97℃左右，与设计冷凝温度偏差20℃左右时，出口损失与热降之比约为10.4%。此外，离开损失的变化还可能导致膨胀机内部产生膨胀波或激波。离职损失成为决定ORC全年业绩的一个重要因素。
The organic Rankine cycle (ORC) favorably operates at low temperature. It differs significantly from the steam Rankine cycle in fluid enthalpy drop during expansion and reaction to change in condensation temperature. In current method for ORC-based energy conversion the expander leaving loss is generally neglected. Shortcomings of this method are outlined in this paper. Theoretical analysis of the expander leaving loss varying with the condensation temperature, evaporation temperature, and inlet pressure is first performed. Experimental test is subsequently carried out. The results indicate that unlike in the steam Rankine cycle, the leaving loss in the ORC on using R123 or R245fa increases by about 10 times as the condensation temperature changes from 30 to 0°C, and is comparable with the enthalpy drop. With an inlet temperature of about 97°C and a deviation of about 20°C from the design condensation temperature, the ratio of the leaving loss to the enthalpy drop is about 10.4%. Besides, variation in the leaving loss may lead to expansion wave or shock wave inside the expander. The leaving loss becomes an important factor and should be included to determine the ORC year-round performance.
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DOI：
10.1115/1.3159375
发表时间：
2010-03
影响因子：
1.5
作者：
Lei Fu;Yan Shi;Qinghua Deng;Z. Feng
通讯作者：
Lei Fu;Yan Shi;Qinghua Deng;Z. Feng
影响因子：
10.4
作者：
Xiangxiang Wang;Li Zhao;Jun Wang
通讯作者：
Xiangxiang Wang;Li Zhao;Jun Wang
DOI：
10.1016/j.energy.2010.12.007
发表时间：
2011-02
期刊：
Fuel and Energy Abstracts
影响因子：
--
作者：
N. Yamada;T. Minami;I. Welpe
通讯作者：
N. Yamada;T. Minami;I. Welpe
DOI：
10.1115/1.3066345
发表时间：
2009-03
影响因子：
3
作者：
James A. Mathias;Jon R. Johnston;Jiming Cao;D. Priedeman;Richard N. Christensen
通讯作者：
James A. Mathias;Jon R. Johnston;Jiming Cao;D. Priedeman;Richard N. Christensen
影响因子：
9
作者：
Takahisa Yamamoto;T. Furuhata;N. Arai;K. Mori
通讯作者：
Takahisa Yamamoto;T. Furuhata;N. Arai;K. Mori