Retraction to: Geotherm Energy (2019) 7:3 https://doi.org/10.1186/s40517-019-0121-z

The authors have retracted this article (Drews et al. 2019) because some data have been used without the appropriate permissions. Additionally, the funding statement is not complete and the authorship is incorrect. In order to obtain the appropriate permissions, several changes are required to the presentation of some of the data in the article. The authors are preparing a new manuscript and will submit this for peer review once these requirements have been met and the permissions have been granted.

All authors agree with this retraction.