## a deep water well

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- Re: a deep water well

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a deep water well

02-11-2010 6:24 PM

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Quote The definition of a horsepower unit is different in different applications application outside of the context of a particular definition will be inaccurate. One mechanical horsepower of 550 foot-pounds per second is equivalent to 745.7 watts. A metric horsepower of 75 kgf-m per second is equivalent to 735.499 watts. A boiler horsepower is used for rating steam boilers and is equivalent to 34.5 pounds of water evaporated per hour at 212 degrees Fahrenheit, or 9809.5 watts. One horsepower for rating electric motors is equal to 746 watts .A Pferdestarke is a name for a group of similar power measurements used in Germany around the end of the 19th century, all of about one metric horsepower in size. An ALAM or SAE horsepower is not a unit of power but instead is a measure of internal combustion engine displacement, and an RAC horsepower or tax horsepower is a differently defined unit of displacement.

We have all all seen camels being used to raise water from a deep well

can anyone say why and what sort of effort is needed ?

in a more specific problem(NO I'm not going to pump oil , only not discovered a well yet)

BUT

If I needed to lift 99 gallons of water every minute from a deep well that was 40 foot below ground

does anyone know the minimum HP pump rating (the pump working efficiency is 75%) I would need to carry out the job?

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Re: a deep water well

02-11-2010 6:28 PM

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Edit.....

But I know a man who does ! ! ! ..(see below)_ Cheesy

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Re: a deep water well

02-11-2010 6:40 PM

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Weight of 1 US Gallon of water = approx. 8.35 lb

Weight of 1 imperial gallon (eg UK measure) of water weighs 10 pounds by definition, at a specified temperature and pressure.

so you have to lift 990 pounds 40 ft per min, that is 39600 ft pounds per min or 660 ft pounds sec or 1.2 HP or at 75% 1.6HP

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Re: a deep water well

02-11-2010 7:07 PM

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I'm looking at this problem in another way

1 Water Horse Power(Horse Power)of power on a water wheel is equivalent

to the water wheel being placed 40 foot vertically below a head of water

which is flowing at a rate of 99 gallons every minute onto it

what comes down must go up

so to pump the same amount of water through the same distance

then 1HP = 1WHP (water horse power)

and because the pump is said to be 75%(effective)

then rated HP of my water pump = 1 times 75/100= 1.34 WHP = 1.34 mechanical Horse Power or

converting it to watts in case the water pump is an electric motor = ~1KW

if the motor was stated in Metric Horse Power

then I would need to convert HP into Metric HP

or metric HP * 100 / 98.6 = Mechanical HP

then 1.34 Mechanical Horsepower = 1.3585853516681599 Metric Horsepower

so yes I think your calculations are right

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Re: a deep water well

02-11-2010 7:08 PM

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Re: a deep water well

02-11-2010 7:09 PM

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Re: a deep water well

02-11-2010 7:11 PM

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Re: a deep water well

02-11-2010 7:18 PM

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A proper one then before they downgraded it Grin

Quote from: pierre_pierre Well I have got an old HNC in fluids and thermo dynamics

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Re: a deep water well

02-11-2010 7:24 PM

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Re: a deep water well

02-11-2010 7:25 PM

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HP = gpm times Head(H) in feet

Head(H)in feet = HP/gpm

gpm = HP/Head(H) in feet

where HP = mechanical Horse Power

Head(feet) = Vertical Height of falling water in feet

gpm = flow of falling water in gallons per minute

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Re: a deep water well

02-11-2010 7:26 PM

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Second Year, Strength of Material, Theory of Machines, Appled Thermodynamis,

Night School completed 1965 said it was old

and I try not to twaddle about the facts

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Re: a deep water well

02-11-2010 7:32 PM

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so its no wonder my workings are so different Cheesy

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Re: a deep water well

02-11-2010 7:35 PM

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Re: a deep water well

02-11-2010 7:45 PM

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a few guys from those times come to mind , tony benn , and the beatles etc

very well done

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Re: a deep water well

02-11-2010 8:26 PM

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