A trigeneration system based on compressed air and thermal energy storage
A trigeneration system based on compressed air and thermal energy storage
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DOI：
10.1016/j.apenergy.2012.04.048
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发表时间：
2012-11-01
期刊：
影响因子：
11.2
通讯作者：
Ding, Yulong
中科院分区：
文献类型：
--
作者：
Li, Yongliang;Wang, Xiang;Ding, Yulong
本文提出了一种新颖的能量存储系统，该系统以压缩空气和热能的形式存储多余的能量。与传统的压缩空气储能（CAES）技术不同的是，新系统在能量释放过程中可以实现电力、热力和冷力的三联产。独特的是，该系统的冷却动力是通过压缩空气的直接膨胀产生的，而不是使用吸收式制冷技术。此外，该系统还可以通过控制空气膨胀机的入口压力和温度来满足最终用户对电力、加热和冷却功率的需求。提出了一个新的参数——综合效率来评价三联产系统的性能。位于芝加哥的一座小型办公楼的能源需求用于评估。结果表明，在冬季不需要制冷的月份，系统的综合效率非常高（接近50%）。夏季，由于空气压缩过程能耗较高，压缩空气膨胀效率低（用于制冷发电），综合效率下降至30%左右。但这一数值仍高于基于吸收式制冷技术的传统三联供系统。因此，由于良好的灵活性和简单的配置，该系统在实际应用中非常有前景，尤其是可再生能源的使用。 Crown 版权所有 (C) 2012 由 Elsevier Ltd 出版。保留所有权利。
This paper presents a novel energy storage system which stores excessive energy in the form of compressed air and thermal heat. It is different from the conventional compressed air energy storage (CAES) technology in that the new system allows trigeneration of electrical, heating and cooling power in energy releasing process. Uniquely, the cooling power from this system is generated by direct expansion of compressed air instead of the use of absorption chilling technology. In addition, the system can meet the end users' demands for electricity, and heating and cooling powers through controlling the inlet pressure and temperature of an air based expander. A new parameter, the comprehensive efficiency, is proposed to evaluate the performance of the trigeneration system. Energy requirements of a small office building located in Chicago is used for the evaluation. The results show that the comprehensive efficiency of the system is very high (similar to 50%) in winter months when no cooling is needed. In summer months, due to the high power consumption in air compression process and inefficient expansion of the compressed air (for cooling power production) the comprehensive efficiency decreases to about 30%. However such a value is still higher than the conventional trigeneration system based on absorption chilling technology. The system is therefore very promising for practical applications particularly for the use of renewable energy due to good flexibility and simple configuration. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.