【作者】 黄晓； 王美霞； 周强泰； 刘存芳；

【Author】 HUANG Xiao, WANG Meixia, ZHOU Qiangtai, LIU Cunfang ( Wei Hai Construction Group Co. , Ltd, Weihai 264009, Shandong, China; College of Energy and Power Engineering , Shandong University , Jinnan 250061, Shandong, China; School of Energy and Environment, Southeast University , Nanjing 210096, Jiangsu, China)

【机构】 中国威海建设集团股份有限公司； 山东大学能源与动力工程学院； 东南大学能源与环境学院；

【摘要】 从质量守恒、动量守恒和能量守恒方程出发,建立以毛细管流动特性仿真为目的的毛细管流动数学模型。模型以Stocker’s模型为基础,考虑入口渐缩、过冷和缠绕直径对流动的影响。模型不仅可以用于R22,还可以应用于替代工质R410A和R407C。利用最优计算结果进行摩阻系数和两相黏度的选择,将仿真计算结果和公开文献中的实验结果进行比较,说明仿真结果是可信的。利用模型研究了毛细管内制冷剂质量流量随毛细管内径、过冷度和冷凝温度的变化情况,结果可以用来指导R22替代HFCs混合制冷剂R407C和R410A空调系统的毛细管设计,具有实际应用价值。更多还原

【Abstract】 The mathematical model to calculate the flow characteristic of the adiabatic capillary tube was proposed in this work, which was based on mass conservation, momentum conservation and energy conservation equation. The Stocker’s basic model was modified with the consideration of various effects due to sub-cooling, area concentration, rolling diameter, and different equations for viscosity and friction factors. The proposed model not only can be used for R22, but also can be applied to the substitutes of R22, that is R410A and R407C. With those equations, the simulation results of the modified model are compared to those in literature, and show a general tendency. The mass flow rate varies with the inner diameter; the degree of subcooling and the condensing temperature were also analyzed. The simulation results could be employed to the capillary tube designing for the air conditioning system with R22, R410a and R407C refrigerant.更多还原