Thermodynamic analysis of chemical heat pumps

被引：19

作者：

Obermeier, Jonas ^{[1
,2
]}

Mueller, Karsten ^{[1
,2
]}

Arlt, Wolfgang ^{[1
,2
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Separat Sci & Technol, D-91058 Erlangen, Germany

[2] Energie Campus Nurnberg, D-90429 Nurnberg, Germany

来源：

ENERGY | 2015年 / 88卷

关键词：

Chemical heat pump; Thermochemical heat storage; Exergy analysis; Reaction equilibrium; Thermodynamic driving force; PERFORMANCE;

D O I：

10.1016/j.energy.2015.05.076

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Thermal energy storages and heat pump units represent an important part of high efficient renewable energy systems. By using thermally driven, reversible chemical reactions a combination of thermal energy storage and heat pump can be realized. The influences of thermophysical properties of the involved components on the efficiency of a heat pump cycle is analysed and the relevance of the thermodynamic driving force is worked out. In general, the behaviour of energetic and exergetic efficiency is contrary. In a real cycle, higher enthalpies of reaction decrease the energetic efficiency but increase the exergetic efficiency. Higher enthalpies of reaction allow for lower offsets from equilibrium state for a default thermodynamic driving force of the reaction. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：489 / 496

页数：8

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