Question

Water from a 5 m tall by 40 m diameter holding tank flows vertically down a 4 m length of 2 m diameter pipe into the bottom of a jacuzzi through a 8 inch diameter horizontal nozzle. The water depth in the jacuzzi is kept at 1 m by pumping water back into the tank. The customer wants to know how much power the 100% efficient pump requires. If the pump is perfectly insulated and transfers no heat to the water, is a chiller necessary to keep the water at the same temperature?

Answer 1