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Solar Assisted Heat Pump with Seasonal Heat Storage

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Solar Assisted Heat Pump with Seasonal Heat Storage ( solar-assisted-heat-pump-with-seasonal-heat-storage )

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Entropy 2021, 23, 47 5 of 17 Figure 3. Four different analyzed cases: (a) Heating system, based on NG boiler and cooling system, and based on auxiliary air–air vapor compression cooling device; (b) heating and cooling system, based on air—water, water—water and ground—water HP; (c) heating and cooling system, based on water—water HP, SHS and STC; (d) heating and cooling system, based on water—water HP, SHS, STC and GW recovery unit. Table 2. Characteristic of heating and cooling energy generators. Type of Heat/Cold Generator Air—water heat pump [23] Ground (brine)—water heat pump [23] Water—water heat pump [23] Natural gas boiler [24] Auxiliary air—air vapor-compression cooling system [22] Characteristic of Generator Qh = 7.6 kW, COP = 3.94 at A2/W35 . Qc = 6.2 kW, EER = 2.76 at A35/W7 . Qh = 5.3 kW, COP = 4.10 at B0/W35 . .Qc = 6.2 kW, EER = 5.55 at B10/W7 Qh = 7.3 kW, COP = 5.37 at W10/W35 . Qc = 6.3, EER = 5.68 at W10/W7 ηgas,a= 87.5% EER = 2.5 at A35/W7 . 2.2.1. Building Heating and Cooling Energy Distribution Systems For building space heating, the floor heating system was considered. In each floor, we assumed six pipe loops. The temperature of heating media was controlled as a function of the ambient temperature. The electric power consumption of the circulation pump was 50 W (considered for all four analyzed systems) [10]. For space cooling, fan coils with a standard 7/12 ◦C regime have been considered.

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