Recent content by Kadm

  1. K

    Thermodynamics problem - Compressing the air. Energy Balance

    Lastly I was without the Internet so that's why I was quiet. Thanks for answer! Thanks for advice I try to do it today. The same, I will do it today. I do not understand what you mean by: Could you please explain this?What's more what should I do to finalize something what is called "energy...
  2. K

    Thermodynamics problem - Compressing the air. Energy Balance

    Let's start one again. I spend sometime on reading and understanding the basis and I want to ask whether I think in wrong or a right way. But first let's summarize what I have. The air is sucked from the atmosphere by a compressor. Atmospheric pressure is 0,1MPa and the temperature is 283K...
  3. K

    Thermodynamics problem - Compressing the air. Energy Balance

    Ok, I understand. Nobody said to me that I am supposed to solve this problem by using the tables, but I think that is necessary to do this. Thanks for the suggestion! The temperature won't change if there were no change in etropy, yes? Tomorrow I will do it, and show the results here ;) Thanks!
  4. K

    Thermodynamics problem - Compressing the air. Energy Balance

    Oh, I understand. So could we leave this part now? :) I have to ask about more details of this part. So let's start once again. We have only one compressor the suction pressure in the compressor is 1.5 MPa, temperature is 283K whereas the discharge 4,5MPa and its temperature is 323K. Sorry for...
  5. K

    Thermodynamics problem - Compressing the air. Energy Balance

    Thank you for the answer! Yes, I have to analyse also the first compressor. But I suppose that it will be similar to the second compressor. What's more I got the information that the temperature between first and second compressor is not important. (is it indeed?) I think that it is quite...
  6. K

    Thermodynamics problem - Compressing the air. Energy Balance

    Firts of all. Thank you very much for the answer! That's right. I feel dumb, that I haven't notice that. The pressure of air is raised in first compresson which is follwed by second compressor which get the air from 1.5MPa to 4.5MPa. I'm not sure if it is right but : Q_{in}=m*(h_e-h_i) ...
  7. K

    Thermodynamics problem - Compressing the air. Energy Balance

    MODERATOR NOTE: THIS THREAD WAS ORIGINALLY POSTED SOMEWHERE ELSE, SO THERE IS NO TEMPLATE. Dear! I have a problem with one, complex exercise. I’ve divided it into three parts just to simplify finding the answer. So let’s start. The air is sucked from the atmosphere by a compressor. Atmospheric...
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