Retrofit of lower GWP alternative R449A into an existing R404A indirect supermarket refrigeration system
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Otros documentos de la autoría: Makhnatch, Pavel; Mota-Babiloni, Adrián; Rogstam, Jörgen; Khodabandeh, Rahmatollah
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Título
Retrofit of lower GWP alternative R449A into an existing R404A indirect supermarket refrigeration systemFecha de publicación
2017-04Editor
ElsevierCita bibliográfica
MAKHNATCH, Pavel, et al. Retrofit of lower GWP alternative R449A into an existing R404A indirect supermarket refrigeration system. International Journal of Refrigeration, 2017, vol. 76, p. 184-192.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S0140700717300610Palabras clave / Materias
Resumen
R404A is going to be phased out from most of the commercial refrigeration systems due to its high GWP value of 3943. R449A (GWP of 1282) has been proposed to replace R404A with only minor system modifications in ... [+]
R404A is going to be phased out from most of the commercial refrigeration systems due to its high GWP value of 3943. R449A (GWP of 1282) has been proposed to replace R404A with only minor system modifications in supermarkets. This paper presents the measurements of a light retrofit replacement of R404A using R449A in a medium temperature indirect refrigeration system (secondary fluid temperature at the evaporator outlet between −9 and −4 °C). It has been demonstrated that with a slight expansion device adjustment and 4% increase of refrigerant charge, R449A can be used in this refrigeration system designed for R404A because of its suitable thermodynamic properties and acceptable maximum discharge temperature. At a secondary fluid temperature at condenser inlet of 30 °C, the COP of R449A nearly matches that of R404A (both were between 1.9 and 2.2), despite having approximately 13% lower cooling capacity. As a conclusion, attending to the GWP reduction and similar energy performance, it was demonstrated using the TEWI methodology that the use of the recently developed refrigerant R449A in these applications can reduce the total CO2 equivalent emissions of an indirect supermarket refrigeration system designed for R404A refrigerant. [-]
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International Journal of Refrigeration, 2017, vol. 76Derechos de acceso
© 2017 Elsevier Ltd and IIR. All rights reserved.
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info:eu-repo/semantics/openAccess
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