## 3 Results
### Geothermal Heat Source Temperature  
The net power production provided by the proposed novel cycle (\(\dot{W}_{net}\)) and the improvement values over the reference cycle (\(\dot{W}_{net,i}\)) for each working fluid for the same cooling capacities with respect to the geothermal heat source temperature are shown in Figure 6. Between the increasing values from 110 \({}^{\circ}\)C to 155 \({}^{\circ}\)C, the net power production by the proposed novel cycle increases for all working fluids. The temperature increase of geothermal heat source raises the mass flow rate of power cycle (\(\dot{m}_{3}\)), which increases both the power produced by the turbine and the power consumed by the pump. Since the increase in power consumption is smaller than the increase in power production, net  
Figure 5: Validation results for various fluids given in the reference study [22]. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Parameters** & **Value** & **Unit** \\ \hline LT evaporator temperature & 5 & \({}^{\circ}\)C \\ MT evaporator temperature & \(-\)10 & \({}^{\circ}\)C \\ LT cooling capacity & 10 & kW \\ MT cooling capacity & 15 & kW \\ Condenser temperature & 40 & \({}^{\circ}\)C \\ ORC evaporator temperature & 100 & \({}^{\circ}\)C \\ Degree of Superheating or Subcooling & 5 & \({}^{\circ}\)C \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Operating conditions for validation [22]. power increases. Between 110 \({}^{\circ}\)C and 150 \({}^{\circ}\)C geothermal heat source temperatures, the largest net power production is observed for R290, ranging from 49 kW to 181 kW. The highest net power is produced by R1234 ze(E) at a geothermal heat source temperature of 155 \({}^{\circ}\)C, as R290 becomes unsuitable for operation under this condition due to a pinch point constraint violation at the ORC evaporator inlet. At higher heat source temperatures, the geothermal fluid transfers more heat to the refrigerant, leading to a greater thermal loss and consequently a lower outlet temperature from the evaporator. In the case of R290 at 155 \({}^{\circ}\)C, this increased heat transfer causes the temperature difference between the refrigerant entering the ORC evaporator and the geothermal fluid exiting it to drop below the required 5 \({}^{\circ}\)C minimum. As a result, the pinch point condition is not satisfied, and R290 cannot be used at this heat source temperature. Compared to the reference cycle, the proposed novel cycle demonstrates higher improvement in net power at lower heat source temperatures, achieving up to 57.8% more net power production at 110 \({}^{\circ}\)C. Although R601 shows a greater improvement in net power than the other fluids, the differences between the fluids' improvement ratios become less significant as the heat source temperature increases, eventually converging to an approximate 9% improvement over the reference cycle for all fluids. The net power values corresponding to various geothermal heat source temperatures are presented in Figure 7 for both the novel and reference cycles, clearly illustrating the differences between the two configurations. As shown in Figure 7, the novel cycle consistently produces more power than the reference cycle for each fluid across all heat source temperatures considered. The reason behind the higher net power output of the proposed cycle is the reduced power consumption by the compressors. This reduction is achieved through the integration of a heat exchanger, which lowers the vapor quality of the refrigerant at the evaporator inlets. As a result, the mass flow rates through both the MT and LT evaporators are reduced. Consequently, mass flow rates through the compressors are reduced. Figure 8 demonstrates this effect under main operating conditions, showing that the evaporator inlet vapor quality values in the proposed novel cycle are lower than those of the reference cycle. On average across all fluids, the vapor quality of the refrigerant entering the MT evaporator is 0.032 in the proposed novel cycle, whereas it is 0.216 in the reference cycle.