Fig. 7From: Maximum potential for geothermal power in Germany based on engineered geothermal systemsElectric energy (MJ) for doublets. For increasing i-p separations from 400 to 2000 m at flow rates of 50, 100, and 150 L s −1. The dashed black line represents the optimized doublet design with the highest electricity production (see Table 4)Back to article page