Review on Thermal Storage Media for Cavern Thermal Energy Storage

Abstract

Developing efficient and reliable energy storage system is as important as exploring new energy resources. Energy storage system can balance the periodic and quantitative mismatch between energy supply and energy demand and increase the energy efficiency. Industrial waster heat and renewable energy such as solar energy can be stored by the thermal energy storage (TES) system at high and low temperatures. TES system using underground rock carven is considered as an attractive alternative for large-scale storage, because of low thermal conductivity and chemical safety of surrounding rock mass. In this report, the development of available thermal energy storage methods and the characteristics of storage media were introduced. Based on some successful applications of cavern storage and high-temperature storage reported in the literature, the applicabilities and practicabilities of storage media and technologies for large-scale cavern thermal energy storage (CTES) were reviewed.

Study on the Effect of Ground Heat Storage by Solar Heat Using Numerical Simulation

“…Recently, many researchers have studied systems for underground heat storage [1,2]. Wang and Qi [3] have conducted performance analysis of a heat pump system using underground heat storage of solar energy in residential buildings based on experimental data.…”