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Numerical simulation of gas-contaminated refrigerant two-phase flow through
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SYSNO ASEP 0346592 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Numerical simulation of gas-contaminated refrigerant two-phase flow through Tvůrce(i) Vinš, Václav (UT-L) RID, ORCID
Hrubý, Jan (UT-L) RID, ORCID
Vacek, V. (CZ)Zdroj.dok. International Journal of Heat and Mass Transfer. - : Elsevier - ISSN 0017-9310
Roč. 53, 23-24 (2010), s. 5430-5439Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova capillary tube ; henry’s law ; non-condensing gases Vědní obor RIV BJ - Termodynamika CEP GA101/09/1633 GA ČR - Grantová agentura ČR CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000282155900043 DOI 10.1016/j.ijheatmasstransfer.2010.07.013 Anotace An unfavorable effect of gas impurities on the throttling process inside a capillary tube has been studied. A special testing capillary tube has been used for an experimental investigation of the capillary flow of a fluorocarbon refrigerant R218 contaminated by nitrogen. The gas impurities significantly affected the throttling process, since the two-phase flow started notably earlier than in the case of pure refrigerant flow. Moreover, the gas contamination resulted in a decreased mass flow rate. A comprehensive numerical model has been developed to simulate the capillary flow of gas-contaminated refrigerant. The model takes into account two coincident thermodynamic events: the throttling process of the refrigerant and the gradual release of the dissolved gas impurities from the refrigerant liquid phase. The model considers adiabatic, thermodynamically equilibrated capillary flow with homogeneous two-phase flow. The numerical simulation is in good agreement with our experimental data. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2011
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