本文提出了一种新型的近逆流式二氧化碳气体冷却器，并对其进行了建模。这种配置使用微通道管和多百叶窗翅片，非常适合CO2冷却器中的非等温传热。该模型使用热交换器几何结构和入口条件作为输入，以预测制冷剂和空气的总负荷以及温度分布。利用该模型可以研究设计条件（例如空气和CO2质量流量）以及几何参数对传热速率和压降的影响。该研究表明，由于使用逆流蛇形管，6.97 kW（典型的汽车空调系统）的气体冷却器热负荷可以在非常小的外壳（0.546 m x 0.408 m x 19 mm）内传输- 侧流配置。还证明了较小的接近温差（5.33°C）。该研究还通过详细的制冷剂和空气温度曲线提供了初步迹象，表明热交换器管壁和翅片中的传导传热可能在确定整体热负荷方面发挥作用。单位:双引文:研讨会论文，大西洋城，2002年

A novel, near-counterflow gas cooler for CO2air-conditioning systems was presented and modeled in this study. This configuration, which uses microchannel tubes and multilouver fins, is ideally suited for the nonisothermal heat transfer in CO2gas coolers. The model uses heat exchanger geometry and inlet conditions as the inputs to predict the overall duty as well as temperature profiles of the refrigerant and air. The effects of design conditions, such as air and CO2mass flow rates, and geometric parameters on heat transfer rates and pressure drops can be investigated using this model. The study demonstrated that a gas cooler heat load of 6.97 kW, typical of an automotive air-conditioning system, can be transferred in very small envelope (0.546 m x 0.408 m x 19 mm) due to the use of the counterflow, serpentine tube-side flow configuration. Small approach temperature differences (5.33°C) were also demonstrated. The study also provided, through detailed refrigerant and air temperature profiles, preliminary indications that conductive heat transfer in the heat exchanger tube walls and fins may play a role in determining the overall heat duty.Units: Dual