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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 system on monthly basis at climate 2. 27 Figure 11 Relative energy consumption (%) of the DX+HPs and C+HPs configurations compared to BHR 28 29 30 31 from 7.7% (in climate 1) to 16.3% (in climate 3) less than the stand-alone system DX+HPs. The availability 32 The comparison on annual basis is reported in Table 5 for all climates. The integrated system BHR consumes of heat recovered at high temperature in the transcritical booster system gives better savings, from 5.9% (in 33 34 35 36 It is once again shown that the R744 systems are more advantageous in the cold climates even if heat 37 climate 1) to nearly 16% (in climate 3), also with respect to the cascade system C+HPs. recovery is performed, forcing transcritical operation when it could be avoided. The all-in-one configuration 38 39 40 41 reduction in the footprint of the plant and in its investment cost. 42 offers further advantages among which a final solution to the need of reducing GWP of refrigerants, the 43 44 45 46 Dynamic simulations performed with a validated model on a commercial refrigeration system interacting 47 6. CONCLUSIONS with the heating plant proved the feasibility of a synergic solution, where heat from the refrigerating plant is 48 49 50 51 fluid for the refrigerating plant, whose operation had to face prolonged transcritical conditions also in 52 evaporator has been installed outdoors to act as a supplemental heat source when recoverable heat is not sufficient. Significant energy saving (up to 16 %) was predicted when comparing this solution with common current configurations like a HFC direct expansion cycle or a cascade cycle both supported by heat pumps to supply heating. A minor energy saving (up to 4.5 %) was estimated when comparing a CO2 systems with full heat recovery to one supported by heat pumps for heating purposes. In this case an “all-in one” solution 53 54 55 56 57 58 59 60 61 62 63 64 65 wintertime, to supply heat while guaranteeing the cooling load for food preservation, An additional recovered to fully satisfy the DHW and heating needs of the building. Carbon dioxide was chosen as thePDF Image | R744 BOOSTER INTEGRATED SYSTEM
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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
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