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Homework Help: Pump and water storage system homework help

  1. Apr 1, 2013 #1

    for a task at school i have to design a pump and water storage system that will be able to work with a wind turbine to supply water from a well to a small community of about 2000 people. i am having some trouble finding information regarding these topics:
    -flow rate of pump
    -power of pump required to push the water up to tank 10m above ground
    - average daily drinking water per person
    - size and materials of tank
    - does the tank have to be insulated
    - shape of the tank

    how do i find any of this stuff out, what should the size of the tank so it can support 2000 people of drinking water, like should it be able to hold water for a day for each person or something, i am just really confused about how i should know any of this information,

    any help suggesting points or websites would be highly appreciated,
  2. jcsd
  3. Apr 1, 2013 #2


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    Google or Wikipedia "drinking water" without quotes. Can easily find info on how much water a human needs to drink each day.

    The pump will need to deliver at least that flow rate. However you might choose to use a pump with a higher flow rate because the wind doesn't blow all the time. You might need to make some assumptions about how long calm and windy periods last. That will help size the tank and the pump flow rate.

    The pump increases the Potential Energy of the water. I'm sure you have seen the equation PE = mgh. Then you need to know that Power equals Energy/time. You will need to convert the volume flow rate to mass flow rate but that's easy. Some maths will give you the output power the pump must deliver.

    However the pump won't be 100% efficient. So find out the efficiency of typical pumps. Then using..

    Efficiency(%) = 100 * output power/input power

    you can calculate the input power required.

    You don't mention which country this is for. That might rule out any need for insulation.

    The pressure at the bottom of a large tank can be quite high. Have a think about what shapes are the strongest for pressure vessels.
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