This paper takes the optimization of heat transfer performance of air conditioner heat exchanger as the core objective, combines with fluid dynamics simulation technology, and systematically discusses the optimization design of heat exchanger. Through the establishment of porous medium model and K-Epsilon turbulence model, ICEM CFD software is used to complete the meshing and numerical simulation. Combined with the verification of grid independence and comparison of empirical formulas, the calculation accuracy is ensured. A conventional shelland-tube heat exchanger is taken as the research object to analyze the sensitivity of parameters such as pitch and tilt angle to Nusselt number and pressure drop, and propose an optimization scheme based on the balance between heat transfer efficiency and energy consumption. Selecting S mm 2.5 and \(\theta=40\) as the optimized structural parameters, the optimized air-conditioning heat exchanger heat transfer efficiency is increased by an average of 350W/(m2-K), the heat transfer efficiency is increased by about 10%, the energy consumption is reduced to 129kW, the footprint is reduced by about 52m, and the maintainability is increased by 26%. The four parameters of the air conditioning heat exchanger under the optimization scheme of this paper, namely, total heat transfer, latent heat, latent heat percentage and dehumidification, are all the largest, which verifies the validity of the optimized design and its applicability in engineering.
