## 5 Summarizing Energy Saving Results
### Total Energy Saving and Energy Performance Upgrade  
The annual primary energy consumption in the current operation state of the Pancretan Stadium is calculated in Table 7. In the same table, the specific primary energy consumption per unit of effective covered area, adopted equal to 15,810.37 m\({}^{2}\) according to the issued energy performance certificate, is also presented. At the same certificate, the reference primary energy specific consumption is calculated at 272 kWh/m\({}^{2}\). The quotient of the above primary energy specific consumptions is 1.58, classifying the Stadium at its current operation state in energy performance D rank.  
With the introduced energy performance upgrade measures, energy saving and production are achieved as summarized in Table 8. According to the presented summarizing results in Table 8, the primary energy new annual consumption is estimated at 1,178,012 kWh and the new primary energy annual specific consumption is calculated at 74.51 kWh/m\({}^{2}\). The ratio of this new primary energy specific consumption versus the reference primary energy specific consumption (272 kWh/m\({}^{2}\)) equals 0.27, imposing the energy performance upgrade of the Pancretan Stadium at A+ rank.  
The new electricity net consumption is calculated by subtracting the PV electricity production from the new total electricity consumption:  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Energy Source** & **Existing State** & **Primary Energy** \\ \hline Active electricity annual consumption (kWh) & 1,889,198 & 5,478,674 \\ Reactive electricity annual consumption (kWh) & 388,407 & 1,126,380 \\ Diesel oil (L) & 16,500 & 186,059 \\ Primary energy annual consumption (kWh) & 6,791,114 \\ Primary energy specific annual consumption (kWh/m\({}^{2}\)) & 429.54 & \\ \hline \hline \end{tabular}
\end{table}
Table 7: Primary energy consumption in the existing operation state of the Pancretan Stadium.  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Intervention** & **Energy Source** & **Production–Saving–Consumption** & **Production–Saving–Consumption (kWh)** \\ \hline Photovoltaic station & 932,711 kWh electricity production & 2,704,862 \\ Lighting system & 356,630 kWh electricity saving & 1,034,228 \\  & 16,500 It diesel oil saving & 186,059 \\ Hot water production & 139,436 kWh electricity saving & 404,366 \\  & 20,609 kg biomass consumption & -119,365 \\ Swimming pools heating & 52,198 kWh electricity saving & 151,373 \\  & 10,588 kg biomass consumption & -61,326 \\ Passive and active measures for air conditioning & 107,052 kWh electricity saving & 310,452 \\ BEMS & 181,696 kWh electricity saving & 526,917 \\ Reduction of reactive consumptions & 163,978 kWh electricity saving & 475,536 \\ Primary energy total annual saving: & 5,613,102 \\ Primary energy remaining annual consumption: & 1,178,012 \\ \hline \hline \end{tabular}
\end{table}
Table 8: Energy savings and production from R.E.S. summarizing results.  
* electricity new annual consumption: 1,052,186 kWh;
* electricity annual production from the PV station: 932,711 kWh;
* electricity new net annual production (compensated with the PV production): 119,475 kWh.