5 mm水平强化管内R410A/润滑油流动冷凝压降实验研究

Experimental Study on Flow Condensation Pressure Drop of R410A/Lubricating Oil in a 5mm Horizontally Enhanced Tube

在质量流率200~400 kg/(m^(2)·s)、干度0.1~0.9、冷凝温度40℃及润滑油浓度0~5%的工况范围内,对5 mm水平强化管内R410A/润滑油混合物流动冷凝压降特性进行了实验研究,分析不同质量流率、干度和润滑油质量分数对冷凝压降特性的影响。实验结果表明:摩擦压降随着质量流率和干度的增大而增大;润滑油的存在对压降特性具有重要影响,在中低干度区域摩擦压降和油影响因子随着润滑油浓度的增大而减小,在高干度区域摩擦压降和油影响因子随着润滑油浓度的增大而增大。

The experimental study on the flow condensation heat transfer of R410 A/lubricating oil in a 5 mm horizontally enhanced tube was carried out to investigate the influences of various mass flow rate, vapor quality and lubricating oil concentration on the condensation pressure drop characteristics under the conditions of mass flow rate of 200-400 kg/(m^(2)·s),vapor quality of 0.1-0.9,condensation temperature of 40 ℃ and lubricating oil concentration of 0-5%.The experimental results show that the frictional pressure drop increases with the increase of mass flow rate and vapor quality;the presence of lubricating oil has an important influence on the pressure drop characteristics.In medium-low vapor quality area, the frictional pressure drop and lubricating oil influence factor decrease with increase of lubricating oil concentration.In high vapor quality area, the frictional pressure drop and oil influence factor increase with increase of lubricating oil concentration.