本文总结了ASHRAE资助的一个项目的研究结果，该项目旨在确定壳程制冷剂冷凝器蒸汽中不可冷凝气体的有害影响。该项目的工作包括879千瓦（250吨）R-11制冷机的数据采集和预测模型的开发，以确定不凝物对冷凝器性能的影响。实验工作包括向冷凝器中注入不致密气体（二氧化碳或氮气），并测量由此产生的气侧传热系数。这些测量是针对体积不超过8%的不致密浓度进行的。此外，沿冷凝器壳体的长度和圆周从八个位置提取气体样本； 用气相色谱仪对这些样品进行分析，以确定不致密物的局部浓度。对数据进行了简化，以确定与不致密材料相关的有效气体侧电阻。数据被用来确定由中等浓度的不致密气体引起的功率损失，发现其约为5%。开发了一个计算机程序来求解适用的传热传质方程（Colburn-Hougen方程），该方程定义了冷凝器的非密度性能，这些方程在两种假设的非密度分布的基础上逐行求解。一个假设均匀非致密分布的一维模型预测冷凝器负荷在-5%到+27%之间。二维模型。 使用非致密材料的轴向分布，预测载荷在-3%到+14%之间。最小的误差发生在额定负载下。二维模型中使用的轴向气体分布基于采样探头测量的气体分布。对以空气为不致密气体的R-11、R-22和R-113系统的气侧电阻进行了预测。引用:ASHRAE交易，第88卷，第2部分，加拿大多伦多

This paper presents a summary of the findings of an ASHRAE-sponsored project to establish the deleterious effects associated with noncondensible gases in the vapor of a shell-side refrigerant condenser. The program work includes data taken on an 879-kW (250-ton) R-11 chiller and the development of a predictive model to define the effect of the noncondensible on the condenser performance.The experimental work included injection of noncondensible gas (carbon dioxide or nitrogen) into the condenser and measuring the resulting gas-side heat-transfer coefficient. These measurements were taken for noncondensible concentrations up to 8% by volume. In addition, gas samples were withdrawn from eight positions along the length and around the circumference of the condenser shell;these samples were analyzed by a gas chromatograph to establish the local concentration of noncondensibles. The data were reduced to define the effective gas-side resistance associated with the noncondensible. Data were taken to establish the power penalty caused by moderate concentrations of noncondensible gases, which was found to be in the order of 5%. A computer program was developed to solve the applicable heat and mass transfer equations (the Colburn-Hougen equation), which define the condenser performance with noncondensibles, and these equations were solved on a row-by-row basis for two assumed distributions of noncondensibles. A one-dimensional model assuming uniform noncondensible distribution predicted the condenser load within -5 to +27%. A two-dimensional model., which uses an axial distribution of noncondensibles, predicted the load within -.3 to +14%. The smallest errors occur at the rated load. The axial gas distribution used in the two-dimensional model was based on that measured with the sampling probes. Predictions of the gas-side resistance were made for R-11, R-22 and R-113 systems with air as the noncondensible gas.