Patent ID: 7225627

Claim:
A method of operating a vapor compression system, comprising: compressing a heat transfer fluid in a compressor; condensing the heat transfer fluid in a condenser; expanding the heat transfer fluid in an expansion device to form an expanded heat transfer fluid; supplying the expanded heat transfer fluid to an evaporator feed line; converting a portion of a liquid form of the expanded heat transfer fluid to a high quality liquid vapor mixture; supplying the high quality liquid vapor mixture to an evaporator coil having a heat transfer surface, converting a portion of a liquid form of the high quality liquid vapor mixture to a vapor form within the evaporator coil; and returning the heat transfer fluid to the compressor by a suction line, wherein, at a fixed cooling load, the heat transfer surface of the evaporator coil is smaller than that required to obtain an equivalent evaporator capacity when the portion of the liquid form of the expanded heat transfer fluid is not converted from the liquid form to the high quality liquid vapor mixture.