Hello AC and everyone else following this discussion,
I am glad I found this thread, I have been searching for days for something like this!!
I live on a boat (sailing Catamaran) I have two 55HP diesel motors and 1 diesel generator.
One of the motors is coupled to a small heat exchanger and supply hot water to the 23lt electric water storage/heater.
I have no means of heating the boat while I waste so much heating energy every time I run one of my three diesel engines.
On top of my engines, it is alway very warm, the actual reading on my infrared thermometer shows the engines are at 70ºc.
All that heat is wasted, I could have boiling water using a heat pump!
I have not been able to find a DIY heat pump construction, lots of commercial ones.
I would like to use some recycled parts from perhaps fridge, air conditioner or car/truck heat exchanger. Or a combination of them.
Do you know of efficient ways to recover heat from those motors, perhaps heating water that I can circulate through the boat to heat it?
Any ideas/ links would be very much appreciated.
Keep smiling
Stefano
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