Louise
your illustration below does not allow for fluid expansion , have
you considered including an expansion chamber / tank or are you intending to utilize the additional pressures that would proportionately increase with the increasing temperatures?
pipes burst if their material strenghts are overcome by the liquid contained in them , they also get longer , and very hot oil squirting on someone could cut them in half.
keep these things in mind in a closed loop such as the one below.
as I said before I think its a good idea to switch the current
50% of our energy consumption from coal fired power plants to the pellet fired plants as you have indicated , only you still need sunshine for this to work , the U.S. needs a stable fuel to switch to Im sure you can agree to that , have you did any research into the possibilities of a lowered solar irradiance level indication in the last few years?
and any forcast as to the levels in the future?
as these would make or break any stable feasibility of this/your concept.
