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heat recovery from R744 based refrigeration system

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heat recovery from R744 based refrigeration system ( heat-recovery-from-r744-based-refrigeration-system )

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Figure 48 Variation of Lorenz efficiency with approach temperature T2 Tb T1 Ta Figure 49 Variation of cooling and heating profile with approach temperature Cooling and heating curves for this specific case are shown in figure 49. In general effectiveness increases by reducing approach temperature, however reverse trend is observed for the case when 3RD heat exchanger was in operation. For better understanding cooling and heating curves for the two cases (with 1ST and 3RD heat exchanger) were plotted under various imposed operating conditions and it was finally concluded that it was the interaction of cooling and heating curve and not the approach temperature which affects the achieved values for effectiveness 43

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