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Energies 2022, 15, 6331 2 Energies 2022, 15, 6331 Finally, the ratio of energies generated, used to charge the battery, and dumpe respect to the demand are shown in Figure 19. It is interesting to note that the sys able to produce a monthly amount of energy that is significantly higher with res respect to the demand are shown in Figure 19. It is interesting to note that the system cillates from 1.27 to 1.74. This means that the system produces at least more than is able to produce a monthly amount of energy that is significantly higher with respect enteortghyeucsoemrnpeaerdesd,atsothteherautioseorfdgenmeranted.tUondefomratnudneadtenlye,rgays(sgheonewrantepdr/edveimoaunsdlyed,)thisen oscillates from 1.27 to 1.74. This means that the system produces at least more than 27% of in significant part dumped due to the time variation of both load and production pa energy compared to the user demand. Unfortunately, as shown previously, this energy is in Performing a comparison with the demand, the dumped energy (dumped/demand significant part dumped due to the time variation of both load and production patterns. 26 of 33 Finally, the ratio of energies generated, used to charge the battery, and dumped with the user needs, as the ratio of generated to demanded energy (generated/demand sults in between 21.4 and 65.6% of the monthly needs. This shows that the system Performing a comparison with the demand, the dumped energy (dumped/demanded) significant potential of effectively supplying energy that is not utilized, and this sit results in between 21.4 and 65.6% of the monthly needs. This shows that the system has a significant potential of effectively supplying energy that is not utilized, and this situation may change if other users outside the system could benefit from the dumped ener may change if other users outside the system could benefit from the dumped energy. ternatively, with a higher battery system capacity, it could be possible to increase t Alternatively, with a higher battery system capacity, it could be possible to increase the ergy supplied to the battery (BAT,charge/demanded), increasing at the same time t energy supplied to the battery (BAT,charge/demanded), increasing at the same time the mand covered by renewables and reducing the waste of energy. demand covered by renewables and reducing the waste of energy. 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 1 2 3 4 5 6 7 8 9 10 11 12 Time [months] generated/demand BAT,charge/demand dumped/demand Figure 19. Ratios of energy generated, used to charge the battery, and dumped with respect to the Figure 19. Ratios of energy generated, used to charge the battery, and dumped with respec demand on a monthly basis. demand on a monthly basis. 4.4. Yearly Results The annual analysis of the considered polygeneration system was carried out on the 4.4. Yearly Results basis of a one-year integration period within the simulation. Main thermal and electrical The annual analysis of the considered polygeneration system was carried out energies in the system components, as well as the energy and economic indexes of the bassyisteomf,aroenrep-yoretaedr intTeagblreast4io–7n. period within the simulation. Main thermal and ele energies in the system components, as well as the energy and economic indexes Table 4. Thermal energies of main components of the system on yearly basis. system, are reported in Tables 4–7. Component Value [MWh] Component Value [MWh] Table 4. Thermal energies of main components of the system on yearly basis. BOIL 145.40 ACH,GEN ACH,EVA 24.00 14.70 77.80 39.40 14.60 25.50 COND ComApHoXnent 130.00 V3a8l.8u0e [MWh] DCComponent USER,HEAT Value [MW 24.00 14.70 77.80 39.40 14.60 25.50 AUX 0.16 BOIL 145.40 ACH,GEN TK1 COTKN3 D 88.90 25.51030.00 USER,COOL USER,DHAWCH,EVA AHX AUX TK1 TK3 38.80 0.16 88.90 25.50 DC USER,HEAT USER,COOL USER,DHW Table 5. Electrical energies of main components of the system on yearly basis. Component Value [MWh] Component Value [MWh d p e 2 e t e u g h h t o h Ratio of generated, battery charge and dumped electrical energy to the demand [-]PDF Image | Hybrid Polygeneration System Based on Biomass Wind and Solar Energy
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