Correction: Geotherm Energy (2021) 9:10https://doi.org/10.1186/s40517-021-00183-2

Following publication of the original article, the authors identified an error in Eq. 12.

The minus ( −) needs to be changed to plus ( +) in Eq. 12.

The equation currently reads:

$$ \int_{0}^{\Delta t} {E\,} {\text{d}}t = S_{R} - \int_{0}^{\Delta t} {Re\,} {\text{d}}t $$

The equation should read:

$$ \int_{0}^{\Delta t} {E\,} {\text{d}}t = S_{R} + \int_{0}^{\Delta t} {Re\,} {\text{d}}t $$
(12)

The original article (Hackstein and Madlener 2021) has been corrected.