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Sizing Of Condensate Return Vessels


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#1 panoska

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Posted 23 October 2025 - 10:32 AM

Hello everyone,

 

Could you please share with me any document or your help with sizing a condensate return vessel?



#2 fallah

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Posted 23 October 2025 - 02:08 PM

Hello everyone,

 

Could you please share with me any document or your help with sizing a condensate return vessel?

 

Liquid condensate mass flow rate (kg/s) = mass flow rate (kg/h) ÷ 3600

Required mass stored (kg)= mass flow rate (kg/s) × retention time (s)

Vessel volume (m³) = mass stored (kg) ÷ liquid condensate density (kg/m³)

Returned vessel diameter can be obtained from vessel volume with supposing a height for the vessel...

 

Note: Typical retention time for normal service is 5-10 minutes



#3 breizh

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Posted 23 October 2025 - 09:45 PM

I think you got your answer.

t=V/F, t time, V useful volume, F flow rate 

 

References to consider: Perry and GPSA 

my 2 cents

Breizh



#4 panoska

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Posted 24 October 2025 - 01:55 AM

Thank you both for your responses. I have a question regarding steam condensate lines: if I have two streams at different pressures—7 barg and 3 barg—feeding into a common condensate vessel, are these typically combined before entering the vessel, or should they be routed separately?

Additionally, should I consider the possibility of flashing within the vessel?



#5 breizh

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Posted 24 October 2025 - 04:01 AM

you should separate the lines otherwise it will affect the flows to the tank. Yes, flash will occur in the pot.

 

Breizh

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#6 panoska

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Posted 25 October 2025 - 06:37 AM

Thank you Breizh for your reply.






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