I am planning to pump water to the roof of my house in order to cool a solar panel array during warm days. I'm trying to determine the best way to route the water as the water source is on one side of the house and the array on the other.
Is it more efficient to minimize the height that the water will move, but introduce some 90° bends in the plumbing, or minimize the bends in the plumbing at the cost of an increase in height? What is the general trade-off in pressure for these scenarios?
To illustrate, I can pump the water straight up, over the apex of my roof and down the other side. Assuming the pump can handle the extra elevation of about 3-4m, gravity will assist in moving the water back down the opposite slope of the roof.
Alternatively, I can bury a length of pipe going from one side of the house to the other, introducing some 90° elbows, then pump straight up to the desired elevation.
A rough estimate shows that I would need to raise water at-most 10m/33'. I don't need a high flow rate since I plan to use micro-irrigation drip sprayers; these things will require at most 1 gallon per hour in flow, but typically much less.