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Comparison of R744 and R410A

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Comparison of R744 and R410A ( comparison-r744-and-r410a )

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5.1 Annual loads Chapter 5: Seasonal Efficiency It has been shown that R410A has higher efficiency in cooling mode while R744 has comparable or higher efficiency in heating mode as well as higher capacity. The higher capacity of R744 in heating mode results in decreased dependence on supplementary heating which has a considerable effect on the overall heating efficiency. As a result, an important component in the comparison of R744 and R410A is the annual estimated heating and cooling requirements. 2000 1800 1600 1400 1200 1000 800 600 400 200 0 Figure 5.1 Temperature bin data Temeprature Bin (C) Heating Vent. Cooling Chicago Dallas/Ft. Worth Seattle In order to gauge this effect, R744 and R410A systems are compared based on temperature bin data for three different cities: Dallas/Ft. Worth, Seattle and Chicago. The selected cities are intended to represent three varying climates. Temperature bin data for these cities is shown in Figure 5.1 (ASHRAE, 1997). 43 -21/-19 -18/-16 -15/-13 -12/-10 -9/-7 -6/-4 -3/-1 0/2 3/5 6/8 9/11 12/14 15/17 18/20 21/23 24/26 27/29 30/32 33/35 36/38 39/41 Hours per year

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Comparison of R744 and R410A

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