Investigation of a working fluid for cryogenic energy storage systems

Cryogenic Engineering Conference 2017

材料科学;物理学

Wojcieszak, P.^1 ; Poliski, J.^1 ; Chorowski, M.^1

Department of Cryogenic, Aeronautic and Process Engineering, Wroclaw University of Science and Technology, Wyb. Wyspianskiego 27, Wroclaw

50-370, Poland^1

关键词: Compressed air energy storages (CAES);    Cryogenic energies;    Cryogenic fluids;    Electrical energy;    Electrical energy storages;    Energy storage plant;    Higher efficiency;    Performance analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012069/pdf
DOI  :  10.1088/1757-899X/278/1/012069

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Cryogenic energy storage (CES) systems are promising alternatives to existing electrical energy storage technologies such as a pumped hydroelectric storage (PHS) or compressed air energy storage (CAES). In CES systems, excess electrical energy is used to liquefy a cryogenic fluid. The liquid can be stored in large cryogenic tanks for a long time. When a demand for the electricity is high, the liquid cryogen is pumped to high pressure and then warmed in a heat exchanger using ambient temperature or an available waste heat source. The vaporized cryogen is then used to drive a turbine and generate the electricity. Most research on cryogenic energy storage focuses on liquid air energy storage, as atmospheric air is widely available and therefore it does not limit a location of the energy storage plant. Nevertheless, CES with other gases as the working fluids can exhibit a higher efficiency. In this research a performance analysis of simple CES systems with several working fluids was performed.