mbartosik
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I'm still trying to optimize the pumping for my ground source heat pump.
I'm wondering if I would likely have some pressure in the return well which would cause the pump to work harder. The return well pipe goes down to the water level, and the return well head is sealed.
I'm wondering if as water is pumped into the return well pressure will build up in the return well?
I would expect that depends on the ground properties at the water level (it is sandy). If pressure does build up then that could be useful to force the water back into the ground rather than filling the well up (the opposite to draw down), however, since there is little draw down in the source well I would expect that there would not need to be much pressure in the return well to force the water back into the ground.
If there is pressure in the return well and I was to equalize it with the atomsphere then I would expect to need less pressure to achieve the same flow, and thus I could drop the pressure and the motor could do less work.
What do the experts think and advise?
I'm wondering if I would likely have some pressure in the return well which would cause the pump to work harder. The return well pipe goes down to the water level, and the return well head is sealed.
I'm wondering if as water is pumped into the return well pressure will build up in the return well?
I would expect that depends on the ground properties at the water level (it is sandy). If pressure does build up then that could be useful to force the water back into the ground rather than filling the well up (the opposite to draw down), however, since there is little draw down in the source well I would expect that there would not need to be much pressure in the return well to force the water back into the ground.
If there is pressure in the return well and I was to equalize it with the atomsphere then I would expect to need less pressure to achieve the same flow, and thus I could drop the pressure and the motor could do less work.
What do the experts think and advise?