蒸汽表面活性剂理论认为，2-乙基己醇是一种表面活性剂，通过驱动液体中的Marangoni对流来增强吸收。酒精通过吸收物（水蒸气）的大量流动通过蒸汽到达液体表面。这意味着酒精和制冷剂在机器中循环。这种循环并没有受到太多关注，但它是一个复杂而有趣的问题。有时观察到酒精在蒸发器中聚集，在那里它与吸收过程隔离。此外，众所周知，酒精会覆盖所有部件的容器内壁。本研究试图理解和量化酒精循环率。尤其需要了解从蒸发器流向吸收器的制冷剂的酒精蒸汽浓度。 这里描述的模型基于每个系统组件的物理模型预测该值。将该模型与吸收式制冷机瞬态试验数据进行了比较。单元:干燥:研讨会论文，大西洋城，2002年

The vapor surfactant theory holds that 2-ethyl-hexanol is a surfactant that causes absorption enhancement by driving Marangoni convection in the liquid. The alcohol arrives at the liquid surface via the vapor by bulk flow of the absorbate (water vapor). This implies that the alcohol circulates through the machine with the refrigerant. This circulation has not received much attention but it is a complex and interesting problem. The alcohol is sometimes observed to collect in the evaporator where it is isolated from the absorption process. Also, the alcohol is known to coat the interior walls of the vessels in all components. The present study is an attempt to understand and quantify the alcohol circulation rates. In particular, it is desirable to know the alcohol vapor concentration of the refrigerant flowing from the evaporator to the absorber. The model described here predicts this value based on physical models of each of the system components. The model is compared against data obtained from transient tests on an absorption chiller.Units: SI