Hi SPLIT!
I don't think so! We still having a lots of problems to stabilize the cycle with temperatures around 60~70 ºC and COP ~ 0.45 to 0.55 For temperatures around 40 ºC, you can consider it that as a pre-heating step, at the most. But than again, the COP will be lower, in order to reach the required temperatures at the generator.
Mac