## 4 Results of the Optimizations
### Isolated Solution  
Two different superstructures have been considered for the optimization of the isolated solution: one including all components considered in Figure 6 and another including all those components, with the exception of the local thermal storages (either heating or cooling). These two different optimizations allow us to understand what the influence of the thermal storages in the optimal solution is. Pure economic and environmental optimizations have been conducted for the isolated solutions. \begin{table}
\begin{tabular}{l c c c c c c c c c} \hline \hline
**User** & **1** & **2** & **3** & **4** & **5** & **6** & **7** & **8** & **9** & **Total** \\ \hline Natural gas (k\(\epsilon\)/y) & 44 & 58 & 37 & 62 & 47 & 27 & 498 & 146 & 177 & 1096 \\ Electricity cost (k\(\epsilon\)/y) & 67 & 171 & 90 & 13 & 95 & 18 & 640 & 52 & 194 & 1340 \\ Operating cost (k\(\epsilon\)/y) & 111 & 228 & 127 & 75 & 142 & 46 & 1138 & 198 & 371 & 2437 \\ Maintenance cost (k\(\epsilon\)/y) & 1 & 2 & 1 & 1 & 1 & 1 & 11 & 2 & 3 & 23 \\ Total investment cost (k\(\epsilon\)/y) & 58 & 141 & 43 & 33 & 47 & 35 & 597 & 127 & 188 & 1267 \\ Annual investment cost (k\(\epsilon\)/y) & 7 & 18 & 6 & 4 & 6 & 4 & 77 & 16 & 24 & 163 \\
**Total annual cost (k\(\epsilon\)/y)** & **120** & **248** & **134** & **80** & **149** & **51** & **1226** & **216** & **399** & **2622** \\ Electricity emission (t/y) & 141 & 358 & 189 & 26 & 199 & 39 & 1341 & 108 & 407 & 2807 \\ Natural gas emission (t/y) & 148 & 194 & 125 & 209 & 158 & 92 & 1677 & 492 & 596 & 3691 \\
**Total annual emission (t/y)** & **289** & **551** & **314** & **236** & **356** & **130** & **3018** & **600** & **1003** & **6497** \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Economic and environmental optimization of the conventional solution. \begin{table}
\begin{tabular}{l c c c c c c c c c c} \hline \hline
**User** & **1** & **2** & **3** & **4** & **5** & **6** & **7** & **8** & **9** & **Total** \\ \hline Bought Electricity (MWh) & 396 & 1005 & 530 & 74 & 558 & 109 & 3766 & 304 & 1143 & 7884 \\ Electricity user demand (MWh) & 347 & 852 & 492 & 74 & 489 & 83 & 3284 & 304 & 1044 & 6968 \\ Electricity required by CC (MWh) & 50 & 153 & 37 & 0 & 69 & 26 & 482 & 0 & 99 & 916 \\ Heat produced by BOI (MWh) & 696 & 911 & 590 & 984 & 741 & 432 & 7888 & 2312 & 2802 & 17,357 \\ Thermal user demand (MWh) & 693 & 909 & 588 & 979 & 740 & 430 & 7884 & 2302 & 2795 & 17,319 \\ Wasted heat (MWh) & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ Cooling energy by CC (MWh) & 149 & 458 & 112 & 0 & 208 & 79 & 1446 & 0 & 297 & 2748 \\ Cooling energy user demand (MWh) & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Optimal annual energy magnitudes (MWh)—conventional solution. The optimal configurations of the isolated solutions are compared to each other and to the conventional solution in Table 6. For matters of clarity, only the total power installed, for each kind of component, has been reported. Focusing on the economic optimizations, the ICEs have been adopted as cogenerators, while the MGTs are never installed. The ST panels are never adopted as well, because PV panels are more convenient and the space intended for the installation of both kind of panels is limited. The introduction of the TS allows a measurable reduction of the sizes of BOI and HP. The CS are not adopted in the optimal solution but, due to the arrangement of the optimal operation caused by the availability of the TS, the ABSs size decreases while the CCs size has to increase, in order to satisfy the cooling peak demand. Focusing on the environmental optimization, it should be observed that the adoption of large components does not imply any penalty for the environmental objective