High efficiency refrigeration system

摘要

An improved evaporator (20) for a refrigeration system to reduce the temperature of a medium therein in which a first tube (30) composed of a first material having a first thermal conductivity is surrounded by a body (40) of a second material disposed in intimate contact therewith, the second material having a different thermal conductivity than the thermal conductivity of the first material. An evaporator refrigerator inlet (62) and outlet (64) are disposed in the body (40) and a refrigeration path (42) intermediate the inlet (62) and outlet (64) includes a plurality of fins (46) in the path (42) to increase the surface area of the second material in the path (42). A refrigeration system using the improved evaporator (20) and including a subcooler (230), is described and a method of manufacturing the evaporator (20) is disclosed. <IMAGE>