## 5 AGEI Application to a Case Study
### Configuration B  
Configuration B is a real-world retrofitting solution tested in the worker village in 2017, when an integrated AWG system was installed to assist the existing plant, delivering the following benefits:  
* Drinking water for residents, replacing the bottled water supply system;
* Domestic water heating, replacing forty-eight existing electric boilers, to meet the needs of two residential buildings, while also assisting the existing LPG boiler in the communal kitchen;
* Cooled and dehumidified air flux, assisting the existing ventilating and air conditioning system to control the indoor climate conditions in the communal kitchen building. The plant configuration is shown in Figure 6. The integrated AWG, described in Section 2, operated under Dubai's environmental conditions of dry bulb temperature (T) and relative humidity (RH). As described in [23], real tests on the integrated AWG were carried out and, with the help of a physically based simulation tool, the average machine behaviour was studied for each month of a whole year. The environmental dataset used for the analyses comes from the weather station of Al Maktoum International Airport, located 9 km from the plant. Due to the comparatively stable climate of Dubai, in compliance with the findings of [34], simulations were carried out on the basis of monthly hourly average values of T and RH with negligible errors. Average monthly values data are reported in Table 11. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Equipment** & **Energetic Input, _en_** & **Useful Effect Indicator** & **Primary Energy Factors, \(f_{i}\)** \\ \hline Electrical boiler & Electricity & efficiency = 95\% & 2.13 \\ LPG boiler & LPG & efficiency = 70\% & 1.07 \\ ATU & Electricity & Average EER = 3.5 & 2.13 \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Configuration A: plant energy characteristic summary. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Primary Energies** & **Value** & **Measure Unit** \\ \hline Primary energy for one litre of bottled water production & 4.336 & MJ/L \\
[see Table 5] & & \\ Total primary energy for one litre of bottled water cooling & 0.490 & MJ/L \\
[see Table 6] & & \\ Primary energy for one litre of bottled water transportation & & \\
[see Table 8] & 0.136 & MJ/L \\ \hline Total primary energy _en_ & 4.962 & MJ/L \\ \hline \hline \end{tabular}
\end{table} 
Table 9: Total primary energy required to produce, cool, and deliver one litre of bottled water. Results coming from the said study have been revised for the current work and are reported in Table 12, which presents the monthly and the yearly average (Avg) system behaviour, comprising:  
* Daily water production W;
* Energy consumption _en_;
* Water condensation energy \(Q_{w}\), calculated by applying (12) and using W and _en_;
* Daily produced cooling energy \(Q_{c}\);
* Daily produced heating energy \(Q_{h}\). Table 13 reports the integrated AWG useful effect indicator values, calculated by means of (18), (19), and (20). \begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline
**Machine Behaviour** & **Jan** & **Feb** & **Mar** & **Apr** & **May** & **Jun** & **Jul** & **Aug** & **Sep** & **Oct** & **Nov** & **Dec** \\ \hline W [L/day] & 1128 & 1202 & 1282 & 1322 & 1365 & 1918 & 1988 & 1961 & 2063 & 1894 & 1486 & 1289 & 1575 \\ _en_ [kWh/day] & 2150 & 2197 & 2309 & 2401 & 2466 & 2764 & 2828 & 2807 & 2809 & 2704 & 2430 & 2256 & 2510 \\ \(Q_{w}\) [kWh/day] & 771 & 821 & 876 & 903 & 933 & 1311 & 1358 & 1340 & 1410 & 1294 & 1015 & 881 & 1076 \\ \(Q_{c}\) [kWh/day] & 1685 & 1676 & 1796 & 1878 & 1950 & 2123 & 2225 & 2200 & 2156 & 2028 & 1860 & 1733 & 1942 \\ \(Q_{h}\) [kWh/day] & 907 & 928 & 952 & 994 & 950 & 898 & 902 & 900 & 904 & 921 & 899 & 905 & 922 \\ \hline \hline \end{tabular}
\end{table} 
Table 12: Monthly and yearly behaviour of the integrated AWG expressed as water production, cooling and heating energies delivery, and related energy consumption. Figure 6: Configuration B: original plant assisted by the integrated advanced AWG machine.