کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
788858 | 1466463 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Supersonic two-phase flow of CO2 through converging–diverging nozzles for the ejector refrigeration cycle Supersonic two-phase flow of CO2 through converging–diverging nozzles for the ejector refrigeration cycle](/preview/png/788858.png)
CO2 is environmentally friendly, safe and more suitable to ejector refrigeration cycle than to vapor compression cycle. Supersonic two-phase flow of CO2 in the diverging sections of rectangular converging–diverging nozzles was investigated. The divergence angles with significant variation of decompression were 0.076°, 0.153°, 0.306° and 0.612°. This paper presents experimental decompression phenomena which can be used in designing nozzles and an assessment of Isentropic Homogeneous Equilibrium (IHE). Inlet conditions around 6–9 MPa, 20–37 °C were used to resemble ejector nozzles of coolers and heat pumps. For inlet temperature around 37 °C, throat decompression boiling from the saturated liquid line, supersonic decompression and IHE solution were obtained for the two large divergence angles. For divergence angles larger than 0.306°, decompression curves for inlet temperature above 35 °C approached IHE curves. For divergence angles smaller than 0.306° or for nozzles with inlet temperature below 35 °C, IHE had no solution.
Journal: International Journal of Refrigeration - Volume 32, Issue 6, September 2009, Pages 1195–1202