Exergy based fluid selection for a geothermal Organic Rankine Cycle for combined heat and power generation
Exergy based fluid selection for a geothermal Organic Rankine Cycle for combined heat and power generation
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DOI：
10.1016/j.applthermaleng.2010.02.012
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发表时间：
2010-08-01
影响因子：
6.4
通讯作者：
Brueggemann, Dieter
中科院分区：
文献类型：
--
作者：
Heberle, Florian;Brueggemann, Dieter
在这项研究中，考虑了温度低于450 K的地热资源的热电联产方案。通过第二定律分析，比较了有机朗肯循环（ORC）和附加发热的串联和并联回路。根据工作参数的标准，工作流体的选择进行了鉴定。结果表明，由于热电联产，地热发电厂的第二定律效率与发电相比可以显着增加。最有效的概念是具有有机工作流体的串联回路，该有机工作流体显示出高临界温度，如异戊烷。对于并联回路和发电，优选具有低临界温度的R227ea等流体。(C)2010爱思唯尔有限公司保留所有权利。
In this study the option of combined heat and power generation was considered for geothermal resources at a temperature level below 450 K. Series and parallel circuits of an Organic Rankine Cycle (ORC) and an additional heat generation were compared by second law analysis. Depending on operating parameters criteria for the choice of the working fluid were identified. The results show that due to a combined heat and power generation, the second law efficiency of a geothermal power plant can be significantly increased in comparison to a power generation. The most efficient concept is a series circuit with an organic working fluid that shows high critical temperatures like isopentane. For parallel circuits and for power generation, fluids like R227ea with low critical temperatures are to be preferred. (C) 2010 Elsevier Ltd. All rights reserved.