| 摘要 |
A method of heat exchange uses a non-azeotropic mixture of refrigerants in plate heat exchangers (4,6,) which accommodate variations in the relative proportions of liquid and vapour refrigerant, allowing the refrigerant in the two phases to main in equilibrium throughout the flow path through the heat exchanger (4, 6,). The configuration of the channel for the refrigerant through the heat exchanger (4, 6,) is arranged so that the resistance to the flow of refrigerant is greater towards one end than towards the other end. This can be achieved by one or more of the plates having a surface profile (14) which is configures so that the resistance to flow of heat exchange fluid along the channel is greater in one region (18, 20) along the length of the channel than in another region (16, 22). <IMAGE> |
