Abstract: A device for transferring heat between a body of water and the surrounding atmosphere includes a water heat exchanger disposed to lie beneath an air heat exchanger. A fan moves ambient air into and through the air heat exchanger, which includes pipes for circulating water from the body of water through the air heat exchanger. The air heat exchanger includes a partition that separates the water flowing through the air heat exchanger from the ambient air flowing through the air heat exchanger. The partition mediates the transfer of heat energy between the ambient air flowing through the air heat exchanger and the water flowing through the air heat exchanger.

Abstract: An energy storage device for a power plant includes a heat exchanger arranged in a floating manner in a lower basin that is fillable with water via a first supply line. A second supply line supplies water from the lower basin. A third supply line is in fluid communication with the heat exchanger. A heat pump provides coolant to the heat exchanger via the third supply line such that energy is extracted via the heat exchanger while freezing of the water in the lower basin or in the form of sensible heat from the water in the lower basin, wherein the energy is passed on to a consumer for heat dissipation or for cold dissipation.