Heating and cooling systems incorporating thermal storage, and d

Details Heating and cooling systems incorporating thermal storage, and d Heating and cooling systems incorporating thermal storage, and d

1995-12-28

1998-05-26

Tanner, Harry B.

Refrigeration

Processes

Defrosting or frost inhibiting

62205, 62278, F25B 4702

Patent

active

057551049

ABSTRACT:
An apparatus for heating or cooling a space comprises a main flow loop including a compressor (1012), an outside heat exchanger (1014), an inside heat exchanger (1016) connected to allow working fluid to circulate therebetween, and a first valve (1026) between the outside heat exchanger (1014) and the inside heat exchanger (1016) selectively to block flow between the outside heat exchanger (1014) and the inside heat exchanger (1016). A first bypass line extends between the outlet of the outside heat (1014) and the inlet of the inside heat exchanger (1016). A thermal storage device (1018) is positioned in the first bypass line. A second bypass line extends between the inlet of the inside heat exchanger (1016) and the outlet of the inside heat exchanger (1016) and communicates with the first bypass line to bypass the inside heat exchanger (1016). A second valve (1030) is positioned in the second bypass line to block flow through the second bypass line selectively. Also described is a method for operating a refrigeration system in a hot gas defrost mode, wherein negative thermal potential transferred to the refrigerant from the frosted evaporator is captured and stored in a thermal storage device for later use. In addition, described is a method for operating a refrigeration system in a low-temperature condensing cycle.

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