Improvement potential of Cryogenic Energy Storage systems by process modi fi cations and heat integration

被引:4
|
作者
Dutta, Rohan [1 ]
Sandilya, Pavitra [1 ]
机构
[1] IIT Kharagpur, Cryogen Engn Ctr, Paschim Medinipore 721302, W Bengal, India
关键词
Cryogenic Energy Storage; Rankine cycle; Claude cycle; Multi-stage turbine; Organic Rankine cycle; Pre-cooling; PERFORMANCE; LAES;
D O I
10.1016/j.energy.2021.119841
中图分类号
O414.1 [热力学];
学科分类号
摘要
Cryogenic Energy Storage (CES) system is currently gaining significant attention in the field of large-scale energy storage systems. This is because this system can provide high energy-density during storage and uses air or nitrogen that are available at no or a low cost. Moreover, the technology has matured and can be used on-site in a decoupled manner. The CES system has three sub-processes, namely, charging or liquefaction, storage, discharging or power cycle. To investigate the improvement potential of such systems, state-of-the-art configurations for each sub-processes have been analyzed in this paper. A configuration consisting of a multi-stage turbine expansion, a turbine and a JT-valve connected in series at the liquefaction stage, Organic Rankine cycle for utilization of heat of compression, and a four-stage reheat Rankine cycle with thermal energy storage at cryogenic temperature has been proposed. The study suggests that a high turnaround efficiency (about 90%) of the process may be achieved by an appropriate external source of thermal energy. ? 2021 Elsevier Ltd. All rights reserved.
引用
收藏
页数:14
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