Hydro heat engine!
This page was put in to answer a query in a newsgroup. Generally, people
convert hydropower to electricity because it is so versatile. Hydro heat
might be an option too.
It has been used in
the past but I do not have any detail about the equipment used.
Here is a way to directly convert mechanical energy to heat. It works
because friction (as the pot turns about the stationary pipes)
cause the high viscosity liquid, pipes and pot to heat up.
Sorry for long sentences!
The water in the pipes takes the heat away to the radiator. The
value of this set-up is its simplicity.
Usually, fluids become less viscous as they heat up, therefore, if
you choose the right fluid, you might be able to regulate the working temperature
of the device. All sorts of baffles can be attached to the pipes
inside the pot to change the amount of turbulence and heat produced per
It can work by convection if powered by hydropower but if the process
was powered by wind power, a small pump is needed to drive the warm liquid
to the radiators.