# Table 1 Estimate of the injection temperature, obtained by extrapolation of values compiled in a literature review of several geothermal wells62. The linear extrapolation from literature values (with the estimated average temperature of Low Enthalpy systems of $$14{0}\,^{\circ}{\rm{C}}$$) leads to the value of $$\Delta T\,=\,32{2}\,^{\circ }{\rm{C}}$$ for the SC case

Category $${T}_{\text{min}}$$ $${T}_{\text{max}}$$ $$< {T} >$$ $$\Delta T$$
$${}^{\circ }{\rm{C}}$$ $${}^{\circ }{\rm{C}}$$  $${}^{\circ }{\rm{C}}$$  $${}^{\circ }{\rm{C}}$$
Hot water $$-$$ $$220$$ $$140$$ $$55$$
Low enthalpy $$220$$ $$250$$ $$235$$ $$131$$
Medium enthalpy $$250$$ $$300$$ $$275$$ $$186$$
High enthalpy $$250$$ $$330$$ $$290$$ $$169$$
Supercritical $$-$$ $$-$$ $$457$$ $$322$$