US Patent 7712326 Energy transfer system and associated methods

An energy transfer system includes an energy transfer device, a water inlet pipe and a water outlet pipe. The water inlet pipe may be connected to a water inlet of the transfer device to extract water from a water source. The water outlet pipe may be connected to a water outlet on the energy transfer device to discharge water to the water source. The water inlet pipe may extract water from a predetermined extraction depth, and the water outlet pipe may discharge water into the water source at a predetermined discharge depth.