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Viewing 15 posts - 1 through 15 (of 32 total)
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  • in reply to: negative values #5527
    sreekanth.manavalla
    Participant

    Dear Karthick, in the Absorber (component 9) the primary fluid (cold fluid) is undergoing temperature drop. That should not happen. That could be the cause of negative mass flow rate in the Absorber.
    Negative enthalpies occur in Cycle-Tempo due to the way in which the reference temperature is defined. Since only the enthalpy differences matter for evaluation, negative enthalpies are not to be worried about.

    in reply to: Heat exchanger efficiency #4471
    sreekanth.manavalla
    Participant

    ETHA is an input for off-design performance of heat exchanger. No description about ETHA is found in the literature.

    in reply to: Heat exchanger efficiency #4390
    sreekanth.manavalla
    Participant

    You may be implying heat exchanger effectiveness (=actual heat transferred/maximum heat transfer possible)?
    As far as I know, there is no way to specify that parameter in Cycle-Tempo. One should compute the exit temperature manually using the effectiveness and input it as TOUT or whichever temperature is not known.
    In Boiler component (evaporator), we can specify the boiler efficiency.
    In Condenser, again, like in heat exchanger, it is not possible to specify the effectiveness.

    in reply to: Error—–Change the parameter LCSIZE #4283
    sreekanth.manavalla
    Participant

    Can you give the context of this error? What components are involved? Is there a user defined function used here?

    in reply to: Text Output #4141
    sreekanth.manavalla
    Participant

    I would like to correct myself. Text output can be printed as a pdf file. In the text output window, choose File–>Print. You can choose to print to pdf at this point. I did it and it worked.

    in reply to: Text Output #4139
    sreekanth.manavalla
    Participant

    Not directly in Cycle-Tempo. But one can copy it to clipboard using Edit–>Copy and paste it in a word document and then convert to pdf.

    in reply to: simulating HVAC systems . #4077
    sreekanth.manavalla
    Participant

    Dear Harish, it is not clear to me how exactly you are going to incorporate a geothermal source in this VCR system. You can try to draw a simple labelled schematic diagram of what you intend to do and upload here.
    It would be better if you can provide a clear problem statement.

    in reply to: DELM #4076
    sreekanth.manavalla
    Participant

    I think after 3 decimal places, the numbers get rounded off.

    in reply to: DIAGRAM T – s #2945
    sreekanth.manavalla
    Participant

    T-S diagrams can be plotted only when the working fluid is water/steam. For other fluids, you can collect the temperature and entropy data using View–>New Table option, transfer the data to a plotting software and plot the T-S diagram there.

    in reply to: RESULTS IN PDF #2911
    sreekanth.manavalla
    Participant

    one can gather the data in the form of a table in which we can choose the parameters to be tabulated. This table can be copied and pasted in Excel, MS word etc.
    Use View–>>New Table

    in reply to: RESULTS IN PDF #2905
    sreekanth.manavalla
    Participant

    Not able to see any attachment or warning message

    in reply to: Installing Cycle-Tempo and Fluidpor / Refprop add-in #2544
    sreekanth.manavalla
    Participant

    Did it work? It has been a long time since I installed RefProp. But I guess what you did could work.

    in reply to: Installing Cycle-Tempo and Fluidpor / Refprop add-in #2525
    sreekanth.manavalla
    Participant

    While installing, at a stage, you will be prompted to provide the license file (or key). Then browse and give the license file (or paste the key).
    For Cycle-Tempo, you can place the license file in the program files–>Cycle-Tempo folder.

    in reply to: ERROR #2515
    sreekanth.manavalla
    Participant

    Try re-installing Cycle-Tempo, may be using the latest version.

    in reply to: Warming / Error #2406
    sreekanth.manavalla
    Participant

    Only image files can be attached

Viewing 15 posts - 1 through 15 (of 32 total)