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  1. #1
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    Flow Rate through Fan Coil Unit


    Is their any way to calculate the actual flow rate through the FCU when the design & Actual Parameters are as....

    System Installed with Auto Flow Valve with a catridge for 0.23L/sec requires a minimun differential pressure of 19 Kpa for the specified flow rate as recommended by Manufacturer.

    Design Flow Rate: 0.23 L/s
    Measured Diff. Press. across Auto Flow Valve: 79Kpa
    Coil Pressure drop (frm Manufacturer): 8.28 Kpa
    Measured Pressure Drop at Coil: 13.20 Kpa

    Please advise how to calculate actual flow rate through the coil?

    Thanks for helps.



  2. #2
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    Re: Flow Rate through Fan Coil Unit

    If your auto-valve is working then your flow rate is 0.23l/s.

    The fpressures at the coil would indicate a higher flow rate but are the pressure test points the manufacturers test points or your own?
    Brian - Torquay, Devon, UK
    I have to stop saying "how stupid can you be?" to my co-workers.
    They're starting to take it as a challenge...

    BASIC MAINTENANCE. If it doesn't move and it should then use WD40. If it moves but it shouldn't then use Duct Tape.

  3. #3
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    Re: Flow Rate through Fan Coil Unit

    Quote Originally Posted by Brian_UK View Post
    If your auto-valve is working then your flow rate is 0.23l/s.

    The fpressures at the coil would indicate a higher flow rate but are the pressure test points the manufacturers test points or your own?
    Test points are not by manufacturer for the Coils and are provided in the installed pipework and value includes additional pressure drop in the pipework. Measured Pressure drop across Auto FLow Valves are using the manufaturer test points/locations.

  4. #4
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    Re: Flow Rate through Fan Coil Unit

    Get an annometer and check for yourself the actual air flow.
    magoo

  5. #5
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    Re: Flow Rate through Fan Coil Unit

    Quote Originally Posted by Magoo View Post
    Get an annometer and check for yourself the actual air flow.
    magoo
    Thanks,

    I am looking for... how to calculate actual water flow rate through the coil?

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