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Homework Help: Plotting T-s Diagram Using Experimental Values

  1. Sep 18, 2010 #1
    Dear all

    This is my first post in Physics Forum, so please do pardon if I do anything wrong.

    1. The problem statement, all variables and given/known data

    I have done an experiment using the following "Steam Power Plant".


    I have managed to obtain pressure readings and temperature readings at the boiler, the turbine inlet and the turbine outlet respectively. These readings are taken when the inlet pressure is relatively stable.

    I find the respective entropy using the steam table, sfg for boiler and outlet, s(superheated) at the inlet.

    After I plotted on results, here is what I get http://s930.photobucket.com/albums/ad147/atsl88/Physics Question/?action=view&current=matlab.jpg .

    It does not look like something that I can extrapolate into a T-s curve.

    2. Relevant equations

    3. The attempt at a solution

    After serious thinking, it seems that at any time, I'll get 3 discrete values at the 3 mentioned locations, which will produce the above results and does not allow me to draw a T-s diagram.

    I hope some one will be able to give me a little advice on what to look at next.

    Best regards

  2. jcsd
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