Original title: Experimental Investigation of Throttling Process Affected by Gas Impurities
Authors: Vinš, Václav ; Vacek, V.
Document type: Papers
Conference/Event: International Conference Experimental Fluid Mechanics 2009, Liberec (CZ), 2009-11-25 / 2009-11-27
Year: 2009
Language: eng
Abstract: The throttling process in a small-diameter tube – capillary tube – was experimentally investigated in this study. A special testing capillary tube equipped with precise temperature and pressure sensors was used to describe the effect of gas impurities, i.e. non-condensing gases (nitrogen in our case), on the flow of throttled refrigerant R218. Total pressure at the onset of vaporization was increased by partial pressure of contaminating gas. Therefore, the two-phase flow of gas-contaminated refrigerant started to be generated notably earlier than in the case of pure refrigerant flow. Mass flow rate of refrigerant delivered through capillary tube decreased even by 20 % in some cases. The experimental data were compared with a numerical simulation of pure refrigerant flow in capillary tube.
Keywords: capillary tube; experiment; non-condensing gases; throttling process
Project no.: CEZ:AV0Z20760514 (CEP)
Host item entry: Experimental Fluid Mechanics 2009, ISBN 978-80-7372-538-9

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0177975

Permalink: http://www.nusl.cz/ntk/nusl-40771


The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers