EXPERIMENTAL STUDY OF TWO-PHASE ADIABATIC FLOW DISTRIBUTION IN SMALL-CHANNEL HEAT EXCHANGERS
Small-channel heat exchangers are widely used for car air-conditioning. However information about their behaviour remains scarce. An experimental device was built to characterize the distribution of two-phase flows in a small-channel heat exchanger and to measure the singular and regular pressure losses. Both were studied with horizontal flow and vertical down-flow through the header. A transparent polycarbonate test section comprised a 16 mm diameter header connected to 8 multi-port flat tubes (Dh = 0.889 mm). The mass flux range was between 15 and 650 kg/(m2.s) in the manifold and between 100 and 3 000 kg/(m2.s) in the small channels. The range of vapour quality values at the test section inlet was between 0.1 and 0.9. The two-phase refrigerant was condensed at the outlet of each flat tube in order to measure each flow rate separately. The refrigerant distribution was studied in single and two-phase flows. The pressure losses were measured.
F.POGGI H.MACCHI-TEJEDA A.MARECHAL D.LEDUCQ A.BONTEMPS
Cemagref, GPAN, Parc de Tourvoie, BP 44,Antony, 92 163, France CEA - GREThE, 17 avenue des martyrs,Grenoble, 38 054, France CEA - GREThE, 17 avenue des martyrs,Grenoble, 38 054, France;Université Joseph Fourier, LEGI, 1021,
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）