PDF Publication Title:
Text from PDF Page: 018
speed was set to match the heating capacity of R410A. As shown in Figure 2.4, when the compressor speed was set to match the R410A cooling capacity: the higher capacity of R744 resulted in an even larger improvement in net heating COP at the lower outdoor temperatures as compared to when the heating capacities were matched. Because of the slight capacity/ heating COP trade-off at moderate temperatures, the R744 advantage could be increased depending on the application. A comparison of the thermodynamic cycle for R744 and R410A for the matched heat pump capacity at the 8.3oC outdoor temperature is shown in Figure 2.5. 13.0 12.0 11.0 10.0 9.0 8.0 7.0 6.0 5.0 Estimated household load: 7.75 kW @ 0 C, 0 kW@ 18.3 C Reduced dependance on back-up heat source at lower outdoor temperature for CO2 R410A 5.00 4.00 3.00 2.00 R410A 1.00 -20 -10 0 10 20 -10 0 Outdoor Temperature (C) R744 R744 Figure 2.3 Effect of increased capacity of R744 at lower outdoor temperatures on overall heating efficiency (matched heating capacity) 10 Outdoor Temperature (C) 20 13.0 12.0 11.0 10.0 9.0 8.0 7.0 6.0 5.0 Estimated household load:7.75kW@0 C, 0 kW @ 1 8. 3 C CO2 5.00 4.00 3.00 2.00 1.00 R410A Reduced dependance on back-up heat source at lower outdoor temperature for CO2 R41 0A R744 -20 -10 0 10 20 Outdoor Temperature (C) -10 0 10 20 Outdoor Temperature (C) Figure 2.4 Effect of increased capacity of R744 at lower outdoor temperatures on overall heating efficiency (matched cooling capacity) 7 Capacity(kW) Capacity(kW) Net Heating COP (Inc. Back-up Resist. Heat) Net Heating COP (Incl. Back-up Res. Heat)PDF Image | Comparison of R744 and R410A
PDF Search Title:
Comparison of R744 and R410AOriginal File Name Searched:
CR039.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)