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in the 10th one. The peaks of energy dissipation are achieved in the periods of d b r m d h d y e i n f h T s m Energies 2022, 15, 6331 of the thermal energy of the condenser, COND, while the remaining part is sup tank TK3 to produce DHW (19.3%) or it is dissipated by the AHX (43.1%). Du activation months of the adsorption chiller, ACH, the production of cooling energ between the heating and cooling demand of the user when the space conditioning of the user is null. In the operation period, the adsorption chiller generator (ACH,GEN) absor demand of the user when the space conditioning demand of the user is null. significant differences due to the lack of a cold storage tank in the system that In the operation period, the adsorption chiller generator (ACH,GEN) absorbs 37.6% dofutche hthearmt (acloeonle)rgloysosfetsh.e condenser, COND, while the remaining part is supplied to tank TK3 to produce DHW (19.3%) or it is dissipated by the AHX (43.1%). During the The results point out also that the stabilization of the monthly thermal loa 23 of 33 energy dissipation are achieved in the periods of shifting between the heating and cooling ACH evaporator (ACH,EVA) follows the demand of the user as expected with activation months of the adsorption chiller, ACH, the production of cooling energy by system by DHW demand is scarce, since, despite a more or less constant trend, t the ACH evaporator (ACH,EVA) follows the demand of the user as expected without any demand is relatively low with respect to other thermal loads of the user. Indee significant differences due to the lack of a cold storage tank in the system that may produce demand accounts for a share between 16.3 and 23.9% of the thermal energy prod heat (cool) losses. The results point out also that the stabilization of the monthly thermal load of the the condenser, COND. system by DHW demand is scarce, since, despite a more or less constant trend, the DHW It is worth mentioning that the monthly thermal energy provided by the a demand is relatively low with respect to other thermal loads of the user. Indeed, DHW heater, AUX, is two orders of magnitude lower with respect to the other energ demand accounts for a share between 16.3 and 23.9% of the thermal energy produced by thus it has been omitted in the graph. the condenser, COND. ItTihs ewoprtehrmateinotnioonifntghtehsayt tshtemointhtelyrmthseromfaellencetrgicyaplreonveidregdiebsyisthsehaouwxilniairny Figur heater, AUX, is two orders of magnitude lower with respect to the other energy flows, thus steam turbine, ST, produces energy in the range of 1.1 and 1.64 MWh, with a var it has been omitted in the graph. 34% due to the change of the user’s thermal demand over the year. Higher vari The operation of the system in terms of electrical energies is shown in Figure 15. The the energy yield is observable for the photovoltaic field, PV, with an oscillatio steam turbine, ST, produces energy in the range of 1.1 and 1.64 MWh, with a variation bofe3tw4%eednuewtointtherc’shawnogersotfathnedussuerm’smther’ms abledsetmaondntohv,ewr thieleyefaor. tHhieghwerinvdartiuatriobnine, WT of the energy yield is observable for the photovoltaic field, PV, with an oscillation of 55% production varies between 2.1 and 3.3 MWh, and the variation is 37%. The trend o between winter’s worst and summer’s best month, while for the wind turbine, WT, energy produced by the generator set, GSET, shows that the system relies each mont production varies between 2.1 and 3.3 MWh, and the variation is 37%. The trend of energy activation of the auxiliary source of energy. The energy generated by the GSE produced by the generator set, GSET, shows that the system relies each month on the between 95 and 473 kWh, making the device mandatory to match the user demand activation of the auxiliary source of energy. The energy generated by the GSET ranges tbhetewpeernes9e5nacnedo47f3akbWahtt,emrayksinygstheemd,eBviAceTm,anddataorcyotonsmtatnchtothpeeursaetriodenmoafntdhdeespteitaemturb the presence of a battery system, BAT, and a constant operation of the steam turbine. The energy storage allows one to provide energy to the user by discharging (BAT,di energy storage allows one to provide energy to the user by discharging (BAT, discharge) between 373 and 697 kWh, showing its important role in saving the system fro between 373 and 697 kWh, showing its important role in saving the system from a more frequent activation of the GSET. frequent activation of the GSET. 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 1 2 3 4 5 6 7 8 9 10 11 12 Time [months] ST WT PV GSET BAT,charge BAT,discharge DUMP USER Figure 15. Main electrical energies of the system on monthly basis. Figure 15. Main electrical energies of the system on monthly basis. The trend of dumped energy (DUMP) reveals that the system is subject to a significant ineffectiveness from the point of view of the utilization of produced electrical energy. Indeed, the energy dumped varies between 0.75 and 2.00 MWh. This is due to the intrinsic Electrical energy [MWh]PDF Image | Hybrid Polygeneration System Based on Biomass Wind and Solar Energy
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