Simulation and application of 5mm tube condenser in display cabinet.

Applying the small diameter copper tubes to replace the traditional 9.52 mm copper tubes in display cabinets will reduce the size and cost of heat exchangers due to higher heat transfer coefficient in refrigerant side, lower copper consumption and less refrigerant charge. This paper present an application to use 5 mm diameter tubes to replace the 9.52 mm tubes for a display cabinet. In this paper, the best fin structure of 5 mm tube is obtained by the theoretical analysis, and the flow path of 5 mm diameter tube heat exchanger is optimized by the heat exchanger simulation tool to compromise the heat transfer and pressure drop. The simulation results shows that the cost of condenser using 5 mm diameter tube reduces 26% while the performance is the same as that of 9.52 mm prototype. The experimental data validates the simulation results and proves the feasibility of applying the small diameters tubes in display cabinet.

在展示柜中采用小直径铜管替代传统9.52mm铜管，可通过提升制冷剂侧换热系数、降低铜材消耗量与制冷剂充注量，缩减换热器的体积与制造成本。本文针对展示柜场景，开展了采用5mm直径铜管替代9.52mm铜管的应用研究。文中通过理论分析确定了5mm管径铜管的最优翅片结构，并借助换热器仿真工具对5mm管径换热器的流路进行优化，以兼顾换热性能与压降特性。仿真结果表明，采用5mm管径铜管的冷凝器制造成本较9.52mm原型机降低26%，而换热性能保持一致。实验数据验证了仿真结果的正确性，证实了小直径铜管在展示柜中应用的可行性。