Patent ID: 11944080
Assignee: nan
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC A  F | IPC A  F

Claim 18:
19. The system of claim 17, wherein the one or more solar thermal collectors comprise one or more evacuated tube collectors; wherein the sidewalls of the water tank are formed of rubber, concrete, or a combination of rubber and concrete; wherein the pump is solar powered and is positioned along the closed loop tubing between the heat exchanger and the heat collector such that, when the pump is turned on, the thermal transfer fluid received by the pump from the heat exchanger is circulated first to the heat collector and then to the heat exchanger; wherein the thermal transfer fluid flowing through the closed loop tubing from the one or more evacuated tube collectors to the heat exchanger has a temperature of at least about 90 degrees Fahrenheit and a freezing point below 32 degrees Fahrenheit; wherein the thermal transfer fluid comprises a food grade antifreeze; and wherein the one or more sensors are positioned at or below a surface of the water in the open air water tank.