Advanced Organic Rankine Cycle for geothermal application

被引：17
|
作者：
Preissinger, Markus [1 ]
Heberle, Florian [1 ]
Brueggemann, Dieter [1 ]
机构：
[1] Univ Bayreuth, Zentrum Energietechn ZET, LTTT, Univ Str 30, D-95447 Bayreuth, Germany
来源：
INTERNATIONAL JOURNAL OF LOW-CARBON TECHNOLOGIES | 2013年 / 8卷
关键词：
organic Rankine cycle; transcritical; fluid mixtures; geothermal; economic evaluation;
D O I：
10.1093/ijlct/ctt021
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Exploitation of geothermal sources based on advanced Organic Rankine Cycle (ORC) is studied with respect to energetic, plant-specific and economic aspects. Three natural and five synthetic refrigerants are investigated as pure fluids within a sub-and transcritical ORC. Furthermore, a zeotropic mixture of R227ea/R245fa is analysed under subcritical conditions. It is shown that transcritical ORC is a promising way to optimize geothermal power plants. The gross power can be increased by >15% compared with standard subcritical processes. Economic analysis indicates that transcritical ORC as well as zeotropic mixtures lead to significantly lower payback periods and, even when taking into account higher specific investment costs and higher mean cash flow.
引用
收藏
页码：I62 / I68
页数：7
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