Study on chilled energy storage of air-conditioning system with energy saving

•We supply new air-conditioning systems with chilled energy storage.•We analysis the systems performances including thermodynamic and economic performances.•A new point for less energy consumption and cost for chilled energy storage application is discovered.•A new direction for utilization of energy storage technologies is given.

Due to higher energy consumption for application of chilled energy storage technology in air-conditioning system in China, this paper provides two new air-conditioning systems with chilled energy storage. With system both thermodynamic and economic analyses, the new system can achieve good economic performance, about 40% power cost saving, resulting from both peak-valley power price and energy saving. And the results also show that chilled storage technology can be adopted with energy saving, instead of just for cost saving in traditional use. The new systems supply a new direction for application of thermal energy storage technology.