TWI591303B

A thermal energy recycling storage device comprises a main container, a heat exchanger installed within the main container, and a temperature control valve disposed on the heat exchanger. With the design for the heat exchanger directly performing heat exchange with water in the main container, this invention may reduce the thermal energy loss and enhance the recycling efficiency, while the water is not likely to be boiled during the thermal energy recycling process and the highest water temperature is increased. During usage in expansion, each main container can be installed with a heat exchanger or not (empty container) based on the requirement, and it is not required for bypass gas release control during thermal energy recycling process, in which the bypass gas release may be performed until the water temperature in each main container has reached the highest water temperature, so that the overall cost is low and the application range is wide.