A novel compressed air energy storage (CAES) system combined with pre-cooler and using low grade waste heat as heat source
A novel compressed air energy storage (CAES) system combined with pre-cooler and using low grade waste heat as heat source
复制标题
一种结合预冷器并利用低品位废热作为热源的新型压缩空气储能（CAES）系统
DOI：
10.1016/j.energy.2017.05.047
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发表时间：
2017-07-15
期刊：
影响因子：
9
通讯作者：
Xie, Mei-Na
中科院分区：
文献类型：
--
作者：
Chen, Long-Xiang;Hu, Peng;Xie, Mei-Na
降低压缩空气储能（CAES）系统燃料消耗是节能环保的大势所趋。余热回收是紧凑型储能系统的一项有趣的技术。但直接利用低品位余热作为热源时，CAES系统热效率较低。本文提出了一种由CAES系统和预冷系统（PC-CAES）组成的综合能源系统，以降低压缩机组在充气过程中的能耗，并提高系统的往返效率（RTE）。利用空调作为预冷器对压缩机进气进行预冷，对五种制冷剂进行了研究。热力学分析是利用稳态数学模型和热力学定律进行的。计算结果表明，所提出的PC-CAES系统的RTE比传统CAES系统提高了3%以上，并且比带有附加压缩级的CAES更加经济。同时，还进行了参数分析，评估了几个关键参数对两个CAES系统系统性能的影响。 (C) 2017 Elsevier Ltd. 保留所有权利。
Decreasing fuel consumption in compressed air energy storage (CAES) system is a general trend for conserving energy and protecting the environment. Waste heat recovery is an interesting technology to compact energy storage system. However, CAES system has a low thermal efficiency when using low grade waste heat as heat source directly. In this paper, an integrated energy system consisting of a CAES system and a precooling system (PC-CAES) is proposed to decrease the energy consumption of compression train in the charging process, and enhance the round trip efficiency (RTE) of the system. Air conditioner is utilized as pre-cooler to precool the inlet air of compressor and five refrigerants are investigated. The thermodynamic analysis is performed by using steady-state mathematical model and thermodynamic laws. The calculation results show that the RTE of the proposed PC-CAES system is improved by more than 3% than that of the conventional CAES system and more economical than CAES with additional compression stages. Meanwhile, a parametric analysis is also carried out to evaluate the effects of several key parameters on the system performance of two CAES systems. (C) 2017 Elsevier Ltd. All rights reserved.