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  1. #1
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    Re-use of cold in refrigeration system



    Hello,

    I am a process engineer currently working on a project concerning a low temperature operation. I try to make a proces scheme for an energy efficient cooling system in which part of the refrigrant-condensation is accomplished by using 'waste-cold' from a cold product stream. However not enough cold is available for the complete condensation and so additional cooling is required (preferrably) with an air condensor. This means two compressors and a 'high' and 'low' temperature condensation steps.

    Is there someone who can tell me something about commercially available systems for the above described situation?

    Thank you in advance,

    Bart



  2. #2
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    Re: Re-use of cold in refrigeration system

    I am afraid that my above written post is not very clear. In fact I am also curious to hear about any kind of options that are available to have a refrigeration cycle with two different condensing temperatures.

    Thank you,
    Bart

  3. #3
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    Re: Re-use of cold in refrigeration system

    .

    You don't need two compressors you need two condensers.

    The first condenser will remove the superheat and then the second
    could do the actual condensing, maybe using a water cooled condenser
    as a de-superheater and then you get the added bonus of heat recovery.

    Then once you have de-superheated the discharge vapour you can then
    use your waste cold process to condense the refrigerant.

    Regards

    Rob

    .
    Last edited by Rob White; 15-01-2013 at 01:31 PM.
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  4. #4
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    Re: Re-use of cold in refrigeration system

    Quote Originally Posted by bart43 View Post
    Hello,

    I am a process engineer currently working on a project concerning a low temperature operation. I try to make a proces scheme for an energy efficient cooling system in which part of the refrigrant-condensation is accomplished by using 'waste-cold' from a cold product stream. However not enough cold is available for the complete condensation and so additional cooling is required (preferrably) with an air condensor. This means two compressors and a 'high' and 'low' temperature condensation steps.

    Is there someone who can tell me something about commercially available systems for the above described situation?

    Thank you in advance,

    Bart
    What do you mean by "waste cold"? Can you clarify this or give example?

  5. #5
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    Re: Re-use of cold in refrigeration system

    Are you talking about a CO2 vapouriser/ re-condeser

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