Comment Re:why not use some of the waste heat? (Score 2) 76
The heat pump's working fluid doesn't have to be water, it'd be whatever fluid can phase change at a "convenient pressure". The released heat on the high pressure side would be used to boil water into steam, which could then be moved to a turbine to generate power.
That "working fluid" woud be what is circulating on the low pressure side, through the cooling blocks.