Enhancing Thermodynamic Efficiency through Hybrid Energy Storage Integration in Cogeneration Plants

Abstract

This study explains why it's important to build larger energy storage facilities in order to accommodate growth in renewable electricity generation. Compressed air energy storage at massive sizes may be feasible for low-cost grid-scale energy storage due to excellent heat control. If cost-effective underground storage options are unavailable, compressed air could be stored in pressurised steel tanks above ground. Liquid air energy storage, on the other hand, is portable and flexible since it does not require a pressurised storage vessel, is light, and has a high volumetric exergy density at ambient pressure. Compressed air energy storage devices have a higher round-trip efficiency than this one. We examine a hybrid power supply that includes two types of air storage that can both function at ambient temperature and pressure. Both the forward (compressed air to liquid air) and reverse (liquid air to compressed air) thermodynamic processes are investigated using hypothetical heat engine and heat pump systems. It has been hypothesised that very efficient heat pump/heat engine systems can achieve a roundtrip efficiency of 53%. Following this, we will investigate the economic viability of hybrid energy storage and conduct a thorough research of heat pump and heat engine systems.