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标题：Investigation on cooling the hot tube surfaces of vortex tube at different pressure and fraction with comprehensive thermal performance analysis
其他标题：Investigation on cooling the hot tube surfaces of vortex tube at different pressure and fraction with comprehensive thermal performance analysis
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作者：Alfan Sarifudin ; Nugroho Agung Pambudi ; Danar Susilo Wijayanto 等
期刊名称：Case Studies in Thermal Engineering
印刷版ISSN：2214-157X
电子版ISSN：2214-157X
出版年度：2020
卷号：22
页码：100739
DOI：10.1016/j.csite.2020.100739
出版社：Elsevier B.V.
摘要：The Raque Hilsch Vortex Tube (RHVT) is a heat pump system that uses the phenomenon of compressed vortex airflow in a tube for cooling and heating. This study aims to determine the effect of pressure and fraction on RHVT by cooling the surface of the hot tube naturally and forcefully. Tube type testing was conducted with a pressure variation of 0.5–1.5 bar and a fraction of 30%–70%. The results of the analysis show that forced cooling on the surface of the hot tube decreases the heating performance ( T h , Δ T h , Q ˙ h , η i s h , and C O P h ) and improves the cooling performance ( T c , Δ T c , Q ˙ c , η i s c and C O P r e f ). The higher pressure increases the performance of T h Δ T h , Q ˙ h , T c Δ T c , and Q ˙ c , and decrease the performance of η i s h , C O P h , η i s c , and C O P r e f . The fraction 40% is the most optimal parameter for the performance of T c Δ T c , Q ˙ c . The 60% fraction works best for T h , Δ T h , Q ˙ h , η i s h , and C O P h , while the fraction 70% works best for Q ˙ c and C O P r e f . The most optimal performance values include T h (41 °C), Δ T h (14 °C), Q ˙ h ( 2.369 kJ / s ) , η i s h ( 24.21% ) , C O P h (0.092), T c (13.450 °C), Δ T c (13.550 °C), Q ˙ c ( 3.280 kJ / s ) , η i s c (20.84%), and C O P r e f (0.123).
关键词：Coefficient of the performance (COP) ; Experiment ; Heat flow ; Isentropic efficiency ; Mathematical analysis