汽车空调用冷凝器总成的分析与研究

1引言在汽车空调冷凝器性能评价中，流动与传热特性无疑占有重要位置，但它并非唯一评价指标。象其它热交换器一样，评价其是否具有应用价值，影响因素较多，例如：（1）以流动与传热为代表的热工性能；（2）可靠性与寿命评价；（3）材料与工艺性能；（4）制造成本；（5）体积、重量与噪音等指标。目前，汽车空调冷凝器分为三种：管片式、管带式和平行流式。许多文献认为，平行流式的热工性能最优，而管片式最欢，但这并不意味着平行流式肯定将成为我国汽车空调冷凝器的发展趋势。本文认为：（1）平行流式工艺复杂，所需材料近期内难以国产…

ANALYSIS AND INVESTIGATION OF A MOBILE AIR CONDITIONER CONDENSER-FAN UNIT

The performance of a mobile air conditioning refrigeration system can be significantlyinfiuenced by its condenser thermal design. After analyzing the current development level ofmobile air conditioning condenser, we enhanced the thermal-hydraulic performance greatlyby the means of heat transfer augmentation and structure optimization. For the compactsurface design of condenser, the match of fan pressure and the mass flux is also consid-ered. Based on the theoretical analysis, a multi-path compact mobile condenser was suc-cessfully developed. The overall heat transfer coefficients was obviously improved while therefrigerant-side pressure drop was reduced. As the air-side pressure drop can be controlledat the original level, the original axial fan can be still used for the new type condenser. Thisresearch achievements have made contributions for national truck air conditioner condenserdevelopment.