**Acknowledgements**

We thank Deutscher Akademischer Austausch Dienst (DAAD) and Departamento Adminis‐ trativo de Ciencia, Tecnología e Innovación de Colombia (COLCIENCIAS) for logistic and financial support. The first author acknowledges the Institute of Energy and Power Plant Technology (EKT) at the Technische Universität Darmstadt (Germany) for its support during a 1‐year academic stay. We thank the reviewers for their helpful comments on an earlier version of the manuscript.
