1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook