材料期刊网

本文提出了一种用于冰箱或冰柜系统的扁管式冷凝器的结构设想，建立了现有板管式和新型扁管式冷凝器的数理模型，并基于有限差分法和等效热阻法分别编写了相应的热力仿真程序，对两种冷凝器的热力性能进行了详细的比较分析。结果表明：新型扁管式冷凝器的散热性能比现有板管式提高大约25％，具有使冰箱系统的能效比进一步提高的潜能。另外，本文还深入研究了扁管孔数、扁管孔径、扁管宽度、制冷剂流量等参数对扁管式冷凝器散热特性的影响规律，发现制冷剂流量和扁管宽度是影响扁管冷凝器散热性能的两个重要因素，对未来扁管式冷凝器的优化设计提供了必要的理论基础。

A new idea that micro-channel flat tube condenser could be used to household refrigeration system has been provided. In order to validate it feasible, the physical models and programs of hot-wall condenser and micro channel flat tube condenser have been built and developed respectively in this paper, based on finite difference method （FDM） and equivalent thermal resistance method. The thermal performance of two kinds of condensers has been analyzed and compared with each other in detail. The result has shown that new flat tube condenser could increase the heat rejection which was more than that of hot-wall condenser about 25 percent, and it could further improve the refrigerator＇s EER. Otherwise, the influence of pore number, pore diameter, flat tube width, plate thickness and refrigerant flow rate on the heat rejection performance of fiat tube condenser has been studied in detail. It was found that refrigerant flow and flat tube width have been the important factors which influence the heat rejection performance of flat tube condenser. This paper could provide the theoretical base on optimal design of flat-tube condenser.