Abstract: A multiple-tank water thermal storage system and its using method belong to energy saving technology. The multiple-tank water thermal storage system includes at least two water tanks. There are an upper diffuser (2) and a lower diffuser (5) provided in each said water tank. The upper and lower diffusers (2, 5) are connected with a chiller (heater) unit (4) and a heat exchanger (11) after connecting in parallel, respectively. Control valves (8) are set on pipes of the upper and the lower diffusers (2, 5), respectively. A thermal energy-charging pump (1) is set on the water-inlet pipe of chiller (heater) unit (4). A thermal energy-releasing pump (10) is set on the water-inlet pipe of the heat exchanger (11), and temperature sensors (6) are set in the water tanks.

Abstract: A multiple-tank water thermal storage system and its using method belong to energy saving technology. The multiple-tank water thermal storage system includes at least two water tanks. There are an upper diffuser (2) and a lower diffuser (5) provided in each said water tank. The upper and lower diffusers (2, 5) are connected with a chiller (heater) unit (4) and a heat exchanger (11) after connecting in parallel, respectively. Control valves (8) are set on pipes of the upper and the lower diffusers (2, 5), respectively. A thermal energy-charging pump (1) is set on the water-inlet pipe of chiller (heater) unit (4). A thermal energy-releasing pump (10) is set on the water-inlet pipe of the heat exchanger (11), and temperature sensors (6) are set in the water tanks.