Shallow geothermics. Always wanted to implement it; now I can and am
ready.
There is now an unused fresh water well in my backyard, has a suction
pump, thus should have a check valve at the bottom of the pipe, then I
believe is not 'deep'. Canot be over ~30 feet. (Coastal North Carolina)
The well water temperature is somewhere near 60=BAF.
Inserting an automobile radiator in the return side of the central air
conditioner duct, fed by the closed loop from a U in the well with a
recirculation pump, should supply the dwelling with ~60=BAF air, to the
capabilities of BTU exchange minus losses.
In summer, for a ~85=BAF weather, a delta t of around 25=BAF; pretty
decent, no airconditioner would be needed. Seems doable.
In winter, for a ~35=BAF weather, a delta t of around 25=BAF ; pretty
decent, not much extra heating requiered from the outputted 60=BAF to
reach 70=BAF desired BUT:
If the central heating system additional work heats up the house to
~70=BAF; about THAT would be the return air temperature; rendering the
geothermal plan unuseable, as if the inserted radiator has 60=BAF, it
would be counteracting and cooling a delta t of 10=BAF instead !
Am I wrong somewhere? How could this case be used in winter? Many
geothermic sites promote supplementary heating in winter even with not
that much delta t wells. I do not see it possible now. Is it about
maintaining the dwelling at 60=BAF while nobody is at home, then turning
on the standard central heating during occupation hours? (And shutting
the geothermal off then ?)
D----->R------>Rad----->H----->S----->D
For D=3Ddwelling; R=3Dreturn duct; Rad=3Dradiator; H=3Dheater; S=3Dsupp=
ly
duct
Thanks,
Miguel
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