TY - JOUR ID - 246033 TI - Modeling, analyses, and assessment of a liquid air energy storage (LAES) system JO - Energy Equipment and Systems JA - EES LA - en SN - 2383-1111 AU - Ghaseminejad, Ali AU - Hajidavalloo, Ebrahim AU - Azimi, Aziz AD - Mechanical Engineering Department, Shahid Chamran University of Ahvaz, Ahvaz, Iran Y1 - 2021 PY - 2021 VL - 9 IS - 3 SP - 249 EP - 260 KW - Liquid Air Energy Storage KW - Exergy Analysis KW - Cost Assessment KW - Storage DO - 10.22059/ees.2021.246033 N2 - In this research paper, a comprehensive thermodynamic model of a LAES system is carried out. Exergy analysis as a potential tool to determine the location and magnitude of losses is applied. The proposed system is comprised of two sub-systems, one is used for air liquefaction which is considered as energy storage. This step is called the charging process. The liquid air is then stored in a cryo-tank. The liquid air is then directed to a series of turbo-expanders for the discharge process. For the system simulation, a code is developed which links the Refprop software to Matlab software where thermophysical properties are obtained. In order to have a better insight of the analyses, a parametric study is performed. The effect of several main parameters (i.e.,  the main pressure entering the cold box, compressor inlet temperature and the first compressor pressure) of the storage cycle on efficiency and cost are investigated. The results indicate that the outlet temperature of the final turbine is limited to the temperature that can enter the evaporator. This constrains limits the inlet temperature to the turbine, which reduces efficiency. In addition, the storage cycle pressure is low. An increase in the main pressure to the cold box can be useful in increasing efficiency. Besides, reducing the inlet temperature to the compressors can increase performance. UR - https://www.energyequipsys.com/article_246033.html L1 - https://www.energyequipsys.com/article_246033_ce7ef9516049bbd0ee0fdf8d7c7c900b.pdf ER -