Operating characteristics of constant-pressure compressed air energy storage (CAES) system combined with pumped hydro storage based on energy and exergy analysis

被引：165

作者：

Kim, Y. M. ^{[1
]}

Shin, D. G. ^{[1
]}

Favrat, D. ^{[2
]}

机构：

[1] Korea Inst Machinery & Mat, ECO Machinery Div, Taejon 305343, South Korea

[2] Swiss Fed Inst Technol Lausanne EPFL, Ind Energy Syst Lab, CH-1015 Lausanne, Switzerland

来源：

ENERGY | 2011年 / 36卷 / 10期

关键词：

Compressed air energy storage (CAES); Constant-pressure CAES; Pumped hydro storage; Exergy;

D O I：

10.1016/j.energy.2011.07.040

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Energy storage systems are becoming more important for load leveling, especially because of the widespread use of intermittent renewable energy. Compressed air energy storage (CAES) is a very promising method for energy storage because CAES relies on existing technologies, is less expensive, and easier to site and permit, as compared to pumped hydro storage. But, in the case of CAES employing hard rock caverns or man-made air vessels, although the smallest possible cavern volume is desirable in order to minimize the construction cost and optimize utilization of the given space, the operating pressure range in the cavern must be limited in order to reduce the deterioration in efficiency of the CAES system at off-design conditions. In this paper, a new constant-pressure CAES system combined with pumped hydro storage was studied to address the current problem associated with the conventional CAES systems. An energy and exergy analysis of the novel CAES system was performed in order to understand the operation characteristics of the system according to several different compression and expansion processes; we then examined the effects of the height of the storage cavern and heat transfer between two media (air, water) and the cavern on the performance of the novel CAES system. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：6220 / 6233

页数：14

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