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Homework Help: I have attached the problem.I know I need to apply the energy

  1. Oct 23, 2012 #1
    I have attached the problem.

    I know I need to apply the energy equation:
    P1/(gamma1)+V1^2/(2*g)+Z1=P2/(gamma2)+V2^2/(2*g)+Z2+h_t+h_f-h_p+h_m

    P=pressure
    V=velocity
    g=gravity
    Z=elevation
    h_t=head due to turbine
    h_p=head due to pump
    The above 2 are 0 since there's no turbine and pump in this problem
    h_t=headloss
    h_m=minor losses due to bends, valves, etc...

    So I must solve for h_t.

    This has me confused, isn't h_t=f*L*2*g/d?
    where f=friction factor (obtained from mood's chart)
    L=length
    d=diameter

    I don't understand why we are given K values if we don't use them, unless I can't apply the equation h_t=f*L*2*g/d?
     

    Attached Files:

  2. jcsd
  3. Oct 24, 2012 #2
    Re: Headloss

    Headloss for pipe components: hL=k*v2/2g where v = velocity

    You need to add the headloss of the pipe components to the headloss of the pipe
     
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