High pressure heat exchanger in carbon dioxide cooling system has multiple of narrow bore holes through connecting tubes to elongate path for efficient heat transfer

摘要

The radiator (2) of a cooling system with compressor (1), evaporator (4), expansion valve (3) and gas/liquid separator (6) has three groups of tubes between in inlet and outlet manifolds with small diameter passages through which the refrigerant flows at speed. The transfer of heat is improved by making the flow path long by passing the refrigerant through the heat exchanger three times.