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Unisim Lng Heat Exchanger

unisim heat exchanger multiple streams heat integration

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#1 firefox23

firefox23

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Posted 16 May 2018 - 01:40 PM

Hi, 

 

I am currently completing a project that requires ,e t design a network of heat exchangers on unisim. In order to incorporate heat integration I have decided to recycle some of my cold fluid outlets back into exchangers by using the add stream button in the LNG exchanger. However, when I add these extra streams the flowrate of my original coolant increases - so I need more and this obviously costs more. I don't understand why this is happening, shouldn't an extra cold flow mean I require less cooling fluid to begin with? I've attached some screenshots to try and illustrate what is happening.

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  • Attached File  1.png   247.92KB   1 downloads
  • Attached File  2.png   293.43KB   1 downloads


#2 Technical Bard

Technical Bard

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Posted 19 May 2018 - 01:13 PM

Check that you aren't cooling the recycle with the refrigerant...






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