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Experimental Performance Measurements
Published in Reinhard Radermacher, Yunho Hwang, Vapor Compression Heat Pumps, 2005
Reinhard Radermacher, Yunho Hwang
R407C, having similar operating pressures as R22, has the advantage of being a retrofit, which means minimal changes to the system for a quick switch to alternatives. Only the expansion devices and the refrigerant charge must be chosen carefully to have performance within 7.8% of R22. R407C has a 6.8% lower cooling seasonal performance and a 4.7% lower heating seasonal performance as compared to R22. The reduction in performance as compared to R22 is relatively small and can be overcome with systems specifically designed for R407C.
Heat Transfer and Pressure Drop in Internal Flow Condensation
Published in Satish G. Kandlikar, Masahiro Shoji, Vijay K. Dhir, Handbook of Phase Change: Boiling and Condensation, 2019
Multicomponent mixtures are encountered in many chemical and process industries. The search for alternative refrigerants has resulted in a ternary refrigerant mixture R407C, composed of 23wt%HFC32, 25wt%HFC125 and 52wt%HFC134a as a possible candidate for replacing R22, which has been widely used in air-conditioning and refrigeration systems until now.
Heat Pump Systems for Drying
Published in Vasile Minea, Industrial Heat Pump-Assisted Wood Drying, 2018
The ozone depletion potential (ODP) of R-407C is zero (compared to 0.055 of HCFC-22) and its global warming potential (GWP) is 1770 (vs. 1810 of HCFC-22) based on integrated time of 100 years.
Performance studies of R433A in a direct expansion solar-assisted heat pump
Published in International Journal of Ambient Energy, 2020
Lokesh Paradeshi, M. Srinivas, S. Jayaraj
Similarly, hydrocarbons, hydrofluorocarbons-based mixtures such as R407C, R404A and R410A were also investigated for the replacement of R22 in heat pump and air-conditioning applications (Calm and Hourahan 2001). Several researchers reported R407C as an alternative to R22 system such as heat pump and air-conditioning applications. Studies reported that, a ternary zeotropic mixture have a lower COP and a higher compressor power consumption (7–14% and 6–8%) (Mongey et al. 1996; Greco et al. 1997; Payne and Domanski 2002; Rakhesh, Venkatarathnam, and Murthy 2003). These HFC mixtures were also tested in the solar-assisted heat pumps. Chata, Chaturvedi, and Almogbel (2005) theoretically studied the thermal performance of a solar-assisted heat pump using various refrigerants. A graphical method was developed for sizing the collector area for different refrigerants. Khorasaninejad and Hajabdollahi (2014) optimised the solar-assisted heat system working with R123, R134a, R407C and R22 using particle swarm algorithm. Nuntaphan, Chansena, and Kiatsiriroat (2009) assessed the performance of a refrigerant mixture consisting of R22/R124/R152a (By mass with the ratio of 20:57:23) in a traditional solar heat pump systems. The results obtained from the mixture indicate that the system COP varies in the range between 2.5 and 5.0. Malinaroli, Joppolo, and Antonellis (2014) carried out the simulation of DX-SAHP working with R407C as a refrigerant. Their results indicate that, R407C has a COP between 2.2 and 4.3. The R407C was reported as a good substitute for replacing R22 in DX-SAHP systems.