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Thread: Delta-t

  1. #1
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    Exclamation Delta-t



    hi everyone

    could someone please explain to me how to work out the delta t for a water chiller

    thanks in advance



  2. #2
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    Re: Delta-t

    Capacity divided water flow = delta T
    Take care: measurements units must be consistent.
    For cooling capacity in kW -> flow (liter/second) = (kW x 860)/(delta T x 3600)

  3. #3
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    Re: Delta-t

    Quote Originally Posted by NoNickName View Post
    Capacity divided water flow = delta T
    Take care: measurements units must be consistent.
    For cooling capacity in kW -> flow (liter/second) = (kW x 860)/(delta T x 3600)

    hi nonickname

    thankyou for your reply

    could you break it down for me a bit more

    i am sure all the info is there but i just dont understand

  4. #4
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    Re: Delta-t

    If you have a cooling capacity of 100KW then divide this by a flowrate of say 6 L/S = 16.66 then divide the answer by the specific heat of water,which is dependant on the temperature entering and leaving the evaporator but generally 4.19 is good enogh.This gives 16.66/4.19 = 3.98 Delta T.
    4.19 is the amount of energy (kj) required to raise 1 KG of water by 1 degree C.

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