When we moved to our house some 30 years ago, we were blessed (and cursed financially) with a swimming pool. The circulation pump has failed after twenty years or so and I'm replacing it like for like. The old pump label says P1 is 0.45 kw, and P2 is 0.25 kw. I understand that P1 is the wattage the pump uses (that I pay for) and P2 is the power delivered at the output shaft (please excuse my mixing of watts, power, etc). So the pump uses 450 watts and pushes out 250 watts, 1/3 of an H/P (pool pumps are often classified by H/P).
This pump motor is quite hefty, about 8" long by 6" wide, all aluminium castings and fins. Can it really only deliver the same power in watts as my wife's hand-held food mixer? My small Bosch hammer drill is rated at 680 watts, can this tiny motor only a few inches long be one and a half times as powerful as the huge pump motor?
I have to say that when the pump runs it sucks mightily (in the original sense of the word) and pushes out about 100 litres a minute, so it isn't a toy, or for that matter a hand-held food mixer. How are these power outputs reconciled?
This pump motor is quite hefty, about 8" long by 6" wide, all aluminium castings and fins. Can it really only deliver the same power in watts as my wife's hand-held food mixer? My small Bosch hammer drill is rated at 680 watts, can this tiny motor only a few inches long be one and a half times as powerful as the huge pump motor?
I have to say that when the pump runs it sucks mightily (in the original sense of the word) and pushes out about 100 litres a minute, so it isn't a toy, or for that matter a hand-held food mixer. How are these power outputs reconciled?