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Dynamic Modelling and Validation of an Air-to-Water Reversible R744

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Dynamic Modelling and Validation of an Air-to-Water Reversible R744 ( dynamic-modelling-and-validation-an-air-to-water-reversible- )

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Energies 2021, 14, 8238 20 of 25 flow rate at the gas-cooler and the electric power input. On the other hand, Figure 15 reports the trend of high pressure and evaporation pressure during the simulation time. It can be observed that during the SH request time, the value of evaporation pressure stayed between 32 and 35 bar, as the high pressure was kept at approximatively 95 bar, as the refrigerant temperature at the gas-cooler outlet was at a mean value of 37.5 ◦C, while during DHW production the evaporation temperature was around 30 bar. Figure 13. Trend of the gas-cooler heat flow rate, DHW, and SH demand during the dynamic simulation. Figure 14. Trend of rotation speed of the compressors during the dynamic simulation.

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Dynamic Modelling and Validation of an Air-to-Water Reversible R744

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