heat interchange / water heater

Water in the tank only plays roles in heat absorption, heat storage and heat release. Water Volume in heat storage tank keeps invariable, and hot water for use goes through heat storage tank. Water goes into the coil, and water absorbs heat energy in the heat storage tank by the coil to increase its temperature. Because of the special design of the coil, water temperature in the coil is closed to hot water temperature in the tank. (Temperature Difference≤3) In this case, water with pressure goes into the coil unceasingly to absorb the heat from solar hot water. When the water increases its temperature to a certain degree, it could go out for use.