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The main products of the research and development project are mainly used in the new falling film evaporator of central air conditioning technology, and the heat transfer performance is more than 15% higher than that of the first generation of falling film evaporation tube, which can improve the efficiency of the central air conditioning unit, reduce the use of refrigerant, reduce greenhouse gas emissions, and reduce energy consumption. The new fin structure is studied, and the evaporation of R134a refrigerant after spraying to the surface of the pipe is studied, so as to verify its beneficial effect on improving the evaporative heat transfer coefficient by test.

For the heat exchangers of chemical, petroleum, electric power, refrigeration and other special industries containing corrosion, the use of stainless steel high-efficiency fin heat exchange tubes can make the boiling or condensation heat transfer coefficient between the outer surface of the heat exchange tube and the liquid outside the tube is significantly improved, and can also reduce the weight, which can resist the harsh use environment and provide a heat exchange tube with strong oxidation corrosion resistance. The material of the existing copper alloy finned tube die and the processing characteristics of the improved material die on the stainless steel finned structure were studied, and the reasonable processing technology and suitable processing die for the three-dimensional finned structure of the stainless steel high-efficiency finned tube were studied through theory and practical experience.