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首页> 外文期刊>Indian Journal of Science and Technology >Numerical Study for Connecter and Section Shape of the Internal Heat Exchanger on Automotive Air Conditioning
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Numerical Study for Connecter and Section Shape of the Internal Heat Exchanger on Automotive Air Conditioning

机译：汽车空调内部热交换器的连接器和截面形状的数值研究

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Regulations affecting the refrigerant used in automotive air conditioning systems are gradually being made compulsory. The Global Warming Potential (GWP) of R-134a refrigerant, which is typically used for conventional automotive air conditioning, is very high. It was therefore necessary to create a new one with a low GWP value, and R-1234yf refrigerant was the result.The new refrigerant solves the GWP problem (its GWP is much lower); however, when it is used, there is a drop in system cooling performance and efficiency. To solve the performance problem, a new automotive cooling system was developed, based on the inclusion of an Internal Heat Exchanger (IHX). The purpose of this study was to verify the effectiveness of the type of IHX pipe-sections and the shapes of connecters, which are welded on the both ends of the IHX pipes in the newly developed system. In the study of the types of IHX pipe-sections, there was a small difference in the efficiency of the jointed and extruded IHX pipe designs.In the study of the connecter shape, the highest heat-transfer rate was achieved by the connecter with the least width. The heat-transfer volume was 385.68 watts. These results confirm that the connecter shape and width influences the effectiveness of heat transfer, and that this effect is greater than that caused by differences between these two pipe-section types.
机译：影响汽车空调系统中使用的制冷剂的法规逐渐成为强制性规定。通常用于常规汽车空调的R-134a制冷剂的全球变暖潜势（GWP）非常高。因此，有必要制造一种新的GWP值低的制冷剂，结果是R-1234yf制冷剂。新的制冷剂解决了GWP问题（其GWP要低得多）;但是，使用时会降低系统的冷却性能和效率。为了解决性能问题，基于内置热交换器（IHX），开发了一种新的汽车冷却系统。这项研究的目的是验证在新开发的系统中，焊接在IHX管道两端的IHX管道截面类型和连接器形状的有效性。在研究IHX管道截面的类型时，连接和挤压IHX管道设计的效率差异很小。在连接器形状的研究中，连接器具有最高的传热率。最小宽度。传热量为385.68瓦。这些结果证实，连接器的形状和宽度会影响传热的有效性，并且这种影响大于由这两种管道截面类型之间的差异引起的影响。

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