Theoretical Analysis for Heat Transfer Optimization in Subcritical Electrothermal Energy Storage Systems
Theoretical Analysis for Heat Transfer Optimization in Subcritical Electrothermal Energy Storage Systems
复制标题
亚临界电热储能系统传热优化的理论分析
DOI：
10.3390/en10020198
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发表时间：
2017-02
期刊：
影响因子：
3.2
通讯作者：
Liu Ming-Hou
中科院分区：
文献类型：
--
作者：
Hu Peng;Zhang Gao-Wei;Chen Long-Xiang;Liu Ming-Hou
电热储能（ETES）基于热泵和热机技术提供大容量电力存储。本文描述了亚临界 ETES。基于火积耗散的极值原理，建立了亚临界 ETES 传热优化的几何模型。传热过程中的火用是根据熵产生来推导的。几何模型通过熵产生的极值原理进行验证。理论分析结果表明，火积耗散极值原理是优化的有效准则，并讨论了相同质量流量或压力下不同情况下的最佳传热问题。通过调节工作流体的质量通量和压力可以实现最佳的传热。它还表明，随着质量通量的增加，在所考虑的范围内存在最小火用，并且火用随着压力的增加而减小。
Electrothermal energy storage (ETES) provides bulk electricity storage based on heat pump and heat engine technologies. A subcritical ETES is described in this paper. Based on the extremum principle of entransy dissipation, a geometry model is developed for heat transfer optimization for subcritical ETES. The exergy during the heat transfer process is deduced in terms of entropy production. The geometry model is validated by the extremum principle of entropy production. The theoretical analysis results show that the extremum principle of entransy dissipation is an effective criterion for the optimization, and the optimum heat transfer for different cases with the same mass flux or pressure has been discussed. The optimum heat transfer can be achieved by adjusting the mass flux and pressure of the working fluid. It also reveals that with the increase of mass flux, there is a minimum exergy in the range under consideration, and the exergy decreases with the increase of the pressure.
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