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Homework Help: Thermodynamics Problem

  1. Dec 16, 2009 #1
    1. The problem statement, all variables and given/known data

    I have problem in calculating heating time of Lube Oil ( SAE 40 ). There is a tank of Lube Oil ( SAE 40) of 19000 liters at 20° C. this oil has to be heated up from 20° C to 40° C with help of a heater of 85 kW through which oil flows at 4800 liter/hour and back to tank.

    How much time it will take to heat up complete tank from 20° C to 40° C. it is a closed loop circuit and small distance. just oil from tank flows at 4800 liter/hour through 85kW heater and then goes back to tank.

    any suggestions for finding time needed ??


    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
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