本研究的目的是:1。收集实验数据，以便在油与制冷剂循环时，测定在多道水平管蒸发器中蒸发的制冷剂的压降和“局部”传热系数。2.全面回顾已发表的关于管内蒸发过程中压降和传热的信息，并给出制冷工程师认为更具应用前景的数据和关联方程或图表。3.检查油对制冷剂蒸发器性能影响的可用信息，并组织将其应用于制冷系统。 4.根据上述第1、2和3项的结果，制定压降和传热系数的通用计算程序，以解释制冷剂蒸发器中存在少量油的影响。

The objectives of this research are:1. To collect experimental data which will permit the determination of pressure drop and "local" heat transfer coefficients for refrigerants evaporating in a multi-pass horizontal tube evaporator, when oil is circulated with the refrigerant.2. To make a comprehensive review of the published information on pressure drop and heat transfer during evaporation in tubes, and present the data and correlation equations or graphs judged to be the more promising for application by refrigeration engineers.3. To examine the availabie- information on the influence of oil on refrigerant evaporator performance, and organize i t for application to refrigeration systems.4. Based on the results of items 1, 2, and 3 above, to develop generalized calculation procedures for pressure drop and heat transfer coefficients that will account for the effects of the presence of small percentages of oil in a refrigerant evaporator.