## 4 Results of the Optimizations
### Isolated Solution
\begin{table}
\begin{tabular}{l c c c c c} \hline \hline  & \multicolumn{3}{c}{**Economic Optimization**} & \multicolumn{3}{c}{**Environmental Optimization**} \\ \cline{2-5}  & **Conventional** & **Isolated** & **Isolated** & **Isolated** & **Isolated** \\  & **Solution** & **Solution** & **Solution** & **without TS** & **Solution** \\ \hline ICE (kW) & 0 & 2820 & 2840 & 4920 & 4920 \\ MGT (kW) & 0 & 0 & 0 & 3900 & 3900 \\ BOI (kW) & 6241 & 2145 & 984 & 609 & 431 \\ ABS (kW) & 0 & 840 & 735 & 3570 & 3570 \\ HP (kW) & 0 & 1750 & 980 & 3570 & 3570 \\ CC (kW) & 3474 & 1274 & 1763 & 1948 & 2008 \\ PV panels (kW) & 0 & 225 & 225 & 45 & 0 \\ ST panels (m\({}^{2}\)) & 0 & 0 & 0 & 1438 & 1800 \\ TS (kWh) & 6973 & 0 & 15,016 & 0 & 36,000 \\ CS (kW) & 0 & 0 & 0 & 0 & 36,000 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Optimal configurations of the isolated solutions compared to the conventional solution. Figure 6: Superstructure of the isolated solution with TSs. function. However, it can be outlined that the ST panels replace the PV panels adopted in the economic optimization. Table 7 shows the results of the optimizations performed for the isolated solutions. Comparing the economic optimizations to the conventional solution, the cost for natural gas used by BOIs significantly decreases, as well as that of the bought electricity. The cost for natural gas used by CHP did not exist for the conventional solution. However, the operating cost in the optimal isolated solutions is halved compared with the conventional one. The optimal isolated solutions, without and with the TS and CS, obtained minimizing the economic objective functions allow us to reduce the total annual cost by 36.7% and 38.8%, and the total annual emissions by 15.9% and 16.5%, respectively. Therefore, the adoption of TSs allows us to reduce either the total annual cost or the total annual emissions. The environmental optimization shows an increase of the operation costs of about 60% compared with the economic optimizations, while it allows a reduction of about 25% of the total annual emissions with respect to the conventional solution. It can be also noted that the amount of emissions due to electricity usage significantly increases, while the emissions saved due to the electricity sold to the grid, and that in consequence of natural gas usage, significantly decrease. The energy balances of the optimizations performed for the isolated solutions are reported in Table 8. It can be observed that the bought electricity is negligible in the economic optimizations, while a significant amount of electricity is sold to the grid. The latter is higher when the TSs are adopted, as they allow us to decouple the thermal demand from the electric one, and to operate the ICE when it is more convenient. Almost all thermal demand is satisfied by the ICEs, while the cooling demand is covered by all three kinds of components which can be adopted (CC, ABS, HP). In the environmental optimizations, the quantity of electricity produced by CHPs and sold to the grid decreases noticeably, while the quantity of electricity bought from the grid increases. The heat produced by the HPs increases significantly, while the cooling energy required by the users is produced by CCs and HPs.