Refrigerators and heat pump systems represent a significant contribution to the global warming phenomenon, due to direct greenhouse gas emissions in case of leakages and plants dismantlement. For this reason, there is an increasing interest from the scientific community and the manufacturers towards low-GWP refrigerants. Among them, R448A and R452A are two attractive solutions for the next future as possible replacements of R404A. However, few data on two-phase heat transfer and pressure drop are currently available in open literature. This paper therefore presents flow boiling heat transfer and pressure drop experimental data of refrigerants R448A and R452A in a horizontal stainless-steel tube with an internal diameter of 6.0 mm. The effect of the operating parameters in terms of mass flux (from 150 to 600 kg m-2s-1), heat flux (from 10 to 40 kW m-2) and saturation temperature (from 25 to 55 °C) are presented and discussed.
Experimental data during flow boiling of refrigerants R448A and R452A / Lillo, G.; Mastrullo, R.; Mauro, A. W.; Viscito, L.. - 2019-:(2019), pp. 1580-1587. (Intervento presentato al convegno 25th IIR International Congress of Refrigeration, ICR 2019 tenutosi a Montreal, Canada nel 2019) [10.18462/iir.icr.2019.1297].
Experimental data during flow boiling of refrigerants R448A and R452A
Lillo G.;Mastrullo R.;Mauro A. W.
;Viscito L.
2019
Abstract
Refrigerators and heat pump systems represent a significant contribution to the global warming phenomenon, due to direct greenhouse gas emissions in case of leakages and plants dismantlement. For this reason, there is an increasing interest from the scientific community and the manufacturers towards low-GWP refrigerants. Among them, R448A and R452A are two attractive solutions for the next future as possible replacements of R404A. However, few data on two-phase heat transfer and pressure drop are currently available in open literature. This paper therefore presents flow boiling heat transfer and pressure drop experimental data of refrigerants R448A and R452A in a horizontal stainless-steel tube with an internal diameter of 6.0 mm. The effect of the operating parameters in terms of mass flux (from 150 to 600 kg m-2s-1), heat flux (from 10 to 40 kW m-2) and saturation temperature (from 25 to 55 °C) are presented and discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
