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R-410A and R-404A real gas thermodynamic relations and their application for predicting exergy efficiency in vapor compression heat pumps

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dc.contributor.author Stegou-Sagia, A en
dc.contributor.author Papadaki, A en
dc.contributor.author Loakim, V en
dc.date.accessioned 2014-03-01T01:55:35Z
dc.date.available 2014-03-01T01:55:35Z
dc.date.issued 2006 en
dc.identifier.issn 0015-7899 en
dc.identifier.uri http://hdl.handle.net/123456789/27802
dc.subject.classification Engineering, Multidisciplinary en
dc.subject.classification Engineering, Mechanical en
dc.title R-410A and R-404A real gas thermodynamic relations and their application for predicting exergy efficiency in vapor compression heat pumps en
heal.type journalArticle en
heal.language English en
heal.publicationDate 2006 en
heal.abstract Enthalpy and entropy equations, as these resulted from the Martin-Hou Equation of State, are presented for the promising mixtures R-404A and R-410A that replace the HCFC-22 in refrigerator and heat pump systems. Based on these equations, a model was developed to simulate the relevant thermodynamic heat pump cycle for vapour compression systems. The variation of exergy efficiency factor, COP and exergy flow is outlined. Moreover focusing on the partial derivatives of pressure, on the real gas heat capacity at constant volume and on real gas heat capacity at constant pressure, useful characteristics such as sound velocity and isentropic exponents are derived and plotted in charts, for a wide area of state conditions. en
heal.publisher SPRINGER HEIDELBERG en
heal.journalName FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH en
dc.identifier.isi ISI:000243073400008 en
dc.identifier.volume 70 en
dc.identifier.issue 4 en
dc.identifier.spage 253 en
dc.identifier.epage 261 en


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