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CHANGES IN HEAT EXCHANGERS FOR PROCESS APPLICATIONS: INCENTIVES AND BARRIERS.

Author(s) : BUTTERWORTH D.

Type of article: Article

Summary

IN A TOTAL SYSTEM, A DESIGN TOOL FOR MINIMISING ENERGY IS A TECHNIQUE KNOWN AS THERMAL INTEGRATION OR < THE PINCH METHOD >. COMPOSITE TEMPERATURE-ENTHALPY CURVES ARE PLOTTED ON THE SAME GRAPH FOR ALL HOT STREAMS AND FOR ALL COLD STREAMS. THE END DIFFERENCES INDICATE MINIMUM HOT AND COLD DUTIES RESPECTIVELY AND THE CLOSEST POINT BETWEEN THE LINES IS THE < PINCH POINT >. IT FOLLOWS THAT IF ONE OR BOTH OF THESE LINES CAN BE MOVED TO DECREASE THE < PINCH >, THE DUTIES CAN BE REDUCED. TO DO THIS, ONE OR MORE HEAT EXCHANGERS WILL NEED TO OPERATE WITH DECREASED TEMPERATURE DIFFERENCE. STANDARD DESIGNS OF HEAT EXCHANGER MAY SHOW SOME ABILITY FOR IMPROVEMENT. IN SHELL-AND-TUBE UNITS, TUBES MAY HAVE INSERTS AND ADDITIONAL OR DIFFERENT SUPPORT OR CROSS FLOW ARRANGEMENTS. BUT BARRIERS EXIST IN RIGID DESIGN CODES, LACK OF COMPUTER SOFTWARE, OR EVEN IN THE MINDS OF DESIGNERS. D.W.H.

Details

  • Original title: CHANGES IN HEAT EXCHANGERS FOR PROCESS APPLICATIONS: INCENTIVES AND BARRIERS.
  • Record ID : 1988-1387
  • Languages: English
  • Source: Heat Transf. Eng. - vol. 8 - n. 4
  • Publication date: 1987
  • Document available for consultation in the library of the IIR headquarters only.

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