That’s unlikely in a closed heat exchange system. Maybe some additional evaporation because the water is slightly warmer. But unless I’m missing something, it seems very misleading to suggest that a Bitcoin transaction uses 16 kilolitres because of evaporation. Napkin math, it would require about 10 megawatt/hours of energy to evaporate that much water (please correct me if I’m wrong). I’m not a Bitcoin fanboy, I just don’t like BS.