An Evaluation of Humidified Discharge Cycle for Cryogenic Pumped Heat Energy Storage

Liquid air energy storage as a standalone technology cannot compete with more mature energy storage solutions. After proving that air humidification improves the round-trip efficiency of the system, the next logical step is to try to utilize any excess heat and investigate ways incorporate it in existing and new installations. The present research focuses on central heating plants combined with humidified discharge cycle and the achieved results show an increase in round-trip efficiency from 59% to nearly 71%.