液体CO_2冷藏车制冷系统的毛细管长度与厢体冷负荷匹配的实验研究

An Experimental Study of the Length of Capillary Tube Matching Cooling Loadin a Liquid Carbon Dioxide Refrigerated Lorry

分析了绿色制冷剂———液体CO2 在毛细管中的流动特征 ,对液体CO2 在外径为 2 .1 8mm、内径为 1 .2 0mm ,在一定进、出口压力下 ,对不同长度、不同曲直程度的毛细管内的质量流量进行了实验研究。同时对制冷系统中使用了毛细管的冷藏车的保温性能进行了测试 。

This paper firstly discussed the flow characteristic of liquid carbon dioxide in a capillary tube; experimental studies on the mass flux of liquid carbon dioxide in capillary tubes with internal diameter at 1.20mm, external diameter at 2.18mm,a certain pressure at the entrance and exit , and different length and different degree of bend were carried out; the refrigerated lorry's heat preservation capacity was tested, the optimal length of a capillary tube matching cooling load of the refrigerated lorry was obtained.