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

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

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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

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Quote:

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Originally Posted by bart43

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

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

Are you talking about a CO2 vapouriser/ re-condeser