本研究的目的是在流速和流体质量较高的情况下，制定制冷剂冷凝器管内传热过程的设计信息。在这些条件下，冷凝液在管道周围扩散，形成环形液膜。研究表明，这种液膜构成了管外热阻的主要部分。例如，0.01英寸。1/2英寸厚的液体Rl2层。直径管将占总热阻的96%。冷凝液的厚度取决于液相和汽相的速度、质量、跨膜温差等。 在3/8英寸水平管内进行了传热实验研究。ID玻璃管和一个9/32英寸的。内径铝管，每根50.5英寸。长的传热系数在60 Btu/hr ft²℉和700 Btu/hr ft²℉之间测量，而主体Rl2和管内表面之间的温差在4 F到40 F之间变化。流体质量在0.60到0.98范围内进行研究，总质量流量在70 lb/hr到300 lb/hr范围内。根据实验结果提出了一种改进的积分技术。该分析为计算管道的局部和平均传热系数以及冷凝层厚度提供了一种实用的方法。 引文:宾夕法尼亚州费城ASHRAE Transactions第77卷第1部分

It was the purpose of this investigation to formulate design information about the heat transfer process in a refrigerant condenser tube when the flow velocity and the fluid quality are high. Under these conditions the condensate spreads out around the tube circumference to form an annular liquid film. This liquid film was shown to constitute a major portion of the thermal resistance for heat leaving a tube. For example, a 0.01 in. thick layer of liquid Rl2 inside a 1/2 in. diameter tube will constitute 96% of the total thermal resistance. The condensate thickness depends on the velocities of the liquid and vapor phases, the quality, the temperature difference across the film, etc.The heat transfer was studied experimentally on the inside of a horizontal 3/8 in. ID glass tube and a 9/32 in. ID aluminum tube, each 50.5 in. long. Heat transfer coefficients were measured between 60 Btu/hr ft2deg F and 700 Btu/hr ft2deg F while the temperature difference between the bulk Rl2 and the inside tube surface varied from 4 F to 40 deg F. Fluid quality was studied over a range from 0.60 to 0.98 and the total mass flow rate ranged from 70 lb/hr to 300 lb/hr.A modified integral technique was formulated from the experimental results. This analysis provides a practlcai method for calculating the local and average heat transfer coefficient and the condensate layer thickness along the tube.