Abstract: A refrigeration system with heat reclaim and a method of operation to reclaim and put to use substantially all of the heat extracted from the compressor discharge gas. A valve connects the discharge of the compressors to either a remote air-cooled condenser which is located outside a building or to at least one heat reclaim coil located inside the building so that the heat in the hot gas is recovered and used to assist in the heating of a building. The heat reclaim coil could be incorporated in a heat exchanger to heat liquid such as to provide hot water. A pressure control device monitors the pressure in the refrigerant at an outlet of the heat reclaim coil and controls the pressure by directing the refrigerant from the outlet of the reclaim coil through valves whereby to reintroduce the liquid in the system to feed the evaporators or to bypass the refrigerant into the remote air-cooled condenser to drop the pressure thereof prior to reintroducing it into the system.

Abstract: The present invention relates to a method and a system for cooling a piston-driven compressor to permit the compressor to operate with a refrigerant gas, such as freon 22, that would normally cause the compressor to overheat and eventually break down. The method and system comprises connecting a heat exchanger in the cool side of the refrigeration system and connecting it in heat exchange relationship with oil circulated in the compressor to cool the oil to lower the compressor temperature whereby the compressor may operate effectively with the refrigerant gas without overheating.