A novel throttling strategy for adiabatic compressed air energy storage system based on an ejector
A novel throttling strategy for adiabatic compressed air energy storage system based on an ejector
复制标题
基于喷射器的绝热压缩空气储能系统新型节流策略
DOI：
10.1016/j.enconman.2017.12.055
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发表时间：
2018-02-15
影响因子：
10.4
通讯作者：
Wang, Feng Xiang
中科院分区：
文献类型：
--
作者：
Chen, Long Xiang;Hu, Peng;Wang, Feng Xiang
绝热压缩空气储能为大规模储能提供了一种有价值的环保选择。目前，效率约为70%，部分原因是空气节流期间的有效能损失问题。为了提高系统的性能，提出了一种新的绝热压缩空气储能系统，该系统采用了一种新的节流策略和一个附加的喷射器。储存容器中的压缩空气被分成三个不同压力的部分。将压力最高的部分压缩空气作为喷射器的主流体，将另一个储存容器中压力最低的部分压缩到中间压力。从而提高了高压涡轮机的进口压力，导致系统效率提高。利用稳态数学模型和热力学定律，进行了包括能量分析、火用分析和参数分析在内的热力学分析。计算结果表明，与传统的绝热压缩空气储能系统相比，该系统的往返效率提高了近2%，经济效益提高了21%以上。同时，还进行了参数分析，以评估几个关键参数的绝热压缩空气储能系统的系统性能的影响。
Adiabatic compressed air energy storage presents a valuable and environmentally friendly option for massive energy storage. Currently, efficiencies are approximately 70%, in part due to the issue of exergy losses during the air throttling. To enhance the performance of the system, a novel adiabatic compressed air energy storage is proposed using a new throttling strategy with an additional ejector. The compressed air in the storage vessels has been divided into three parts with different pressures. The part of compressed air with highest pressure is regarded as primary fluid of ejector to compress the part of air with lowest pressure in the other storage vessel to an intermediate pressure. Hence the inlet pressure of high pressure turbine enhanced, results in the system efficiency improves. The thermodynamic analysis including energy analysis, exergy analysis and the parametric analysis are evaluated by using steady-state mathematical model and thermodynamic laws. The calculations show that the round trip efficiency improves nearly 2% and the profit increases by more than 21% compared to the conventional adiabatic compressed air energy storage system. Meanwhile, a parametric analysis is also carried out to evaluate the effects of several key parameters on the system performance of the proposed adiabatic compressed air energy storage system.