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Energies 2022, 15, 6398 15 of 23 Month January February March April May June July August September October November December Global Horizontal Irradiance (kWh/m2) POA Irradiance Shaded (kWh/m2) (kWh/m2) 45.4 42.2 51.5 50.0 77.4 76.1 101.4 99.9 132.5 130.7 142.9 140.9 148.5 146.4 131.3 129.6 94.4 93.0 65.1 64.0 35.1 34.2 34.3 31.7 Nameplate (kWh) 27,082.2 32,320.0 49,510.8 65,138.9 84,963.5 92,006.3 95,432.1 84,694.0 60,476.6 41,553.7 22,064.8 20,403.9 Grid (kWh) 18,032.4 21,568.0 31,330.0 40,092.6 50,198.5 52,864.1 54,114.6 47,904.7 36,207.9 27,173.6 16,073.8 14,717.9 Table 4. Cooling power requirements. Cooling Power (kW) Current Demand 324 Actual power installed 550 Newly Designed Facilities Total 3803 4127 3803 4353 In terms of covering the cooling demand, sorption chillers will be used. The cooling power demand will be met by the geothermal boiler plant installation. 4.3. Photovoltaic Installation The PV panels that are proposed as part of the HGS system will be installed over the current parking spaces. Due to the large surface area of the car park and the need to cover 298 parking spaces at three different azimuths, the size of the structure will vary. The photovoltaic panels will be made using passivated emitter rear cell (PERC) technology. They are characterized by higher efficiency compared to classical monocrystalline cells, as well as higher mechanical and static load resistance [41–43]. PERC refers to the cell construction technology for the bottom passivation of the emitter. The PERC cell is distinguished from the classical cell by the construction of the underside of the cell. Between the top electrode and the bottom of the P-N junction, there is an insulator insert, the function of which is to limit the attraction of electrons to the aluminum bottom electrode. In addition, the underside passivation of the junction causes solar radiation to be reflected back to the base of the cell. The cell achieves a higher power output. This is all thanks to the improved use of long-wavelength infrared radiation. In a conventional cell, this releases electrons at the back of the cell or passes through the cell, generating heat. The ability of PERC cells to use longer-wavelength light translates into higher efficiency—especially in the mornings, evenings, or on cloudy days [44,45]. Monocrystalline panels are made from a whole-crystal element and guarantee significantly longer operation and life without loss of efficiency for more than 30 years, compared to polycrystalline panels. The amount of gross and net (DC) energy generated by the photovoltaic cells planned for the 693 kWp installation according to the months of the year, taking into account the shade thrown on the car park shelter area, is summarized in Table 5 using the HelioScope software. Table 5. Energy production from the PV installations of 691.3 kWp. 37.0 45.1 72.5 97.5 130.3 142.0 146.1 127.2 88.4 59.9 31.8 29.0 The shadow report for the lowest sun (longest shadow) is shown in Figure 6.PDF Image | Combined Renewable Energy Resources System Geothermal
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