You cant freeze the bottom of a lake or river only the top even if you are chilling the bottom.
Posted on: January 29, 2013, 03:44:54 PMPosted by: noah
Starting & stopping a heat pump compressor does appear to be a problem for a waterwheel drive; thanks noah.
I am thinking that it would be better to use the waterwheel & generator for DHW using an immersion heater and large storage cylinder.
The whole idea of using a heat pump is the efficiency of heat production,- put 3kw in get 9kw heat out!
Will you generate 3kw of electricity ?
Could you suspend some steel pipes along the river as a ground source , Navitron WR09 heatpump needs a flow of 21 litres minute (which is not much) through the heat exchanger.
Use grid tie to start compressor (big surge) and run off water wheel electric.
At 3x the heat output with a cop of 3 which should be easy to achieve I'd be seriously considering a heatpump.
rgds George.