为研究循环倍率对氨制冷系统换热性能的影响,基于管内强制对流换热经验公式建立模型。通过仿真计算分析了质量流速、循环倍率、霜层厚度等系统换热性能的影响。结果表明,相比霜层厚度增加,降低循环倍率对换热性能的影响较小,但对提高氨系统安全性有重要意义。 In order to study the effect of circulation rate on the heat transfer performance of ammonia refrigeration system, a model was established based on the experience formula of forced convection heat transfer in pipe. The effects of mass flow rate, circulation rate, frost layer thickness and other heat transfer performance of the system were analyzed by simulation. The results show that, compared with the increase of frost layer thickness, the effect of reducing the circulation rate on the heat transfer performance is small, but it is of great significance to improve the safety of the ammonia system.