Google found a source[0] that says around 57%. The link here is describing a solar panel as the heat source, but the technical report I found implies it usually

Google found a source[0] that says around 57%. The link here is describing a solar panel as the heat source, but the technical report I found implies it usually uses waste heat from other industrial processes. [0]: https://www.sciencedirect.com/science/article/pii/S0360319914002389 https://www.sciencedirect.com/science/article/pii/S036031991...