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Thermo question (Compressor w/ cooling fluid)

  1. Sep 30, 2012 #1
    I attached the HW assignment. Its question number 2.

    I choose a control volume including the cooling stream from the lake and the fluid being condensed. I assumed with this CV that the heat generated was 0 and that the net Work was 0.

    Using these assumptions I solved for the mass flow rate and I got a number that seemed totally unreasonable... M= 4484.5 Kg/s .. Anyone have any suggestions?

    is it okay to assume the net work is 0?
     

    Attached Files:

  2. jcsd
  3. Oct 1, 2012 #2
    All of your assumptions seem correct and I got very close to the same answer that you did. A high mass flow rate in the cooling fluid is to be expected to cause such a tremendous energy change in a high speed mass flow rate of an almost completely saturated vapor.
     
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