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SECOND-LAW-BASED OPTIMIZATION OF HEAT EXCHANGER NETWORKS USING LOAD CURVES.

Author(s) : CHATO J. C., DAMIANIDES C.

Type of article: Article

Summary

THE PROBLEM OF SIMULTANEOUSLY OPTIMIZING HEAT EXCHANGERS FOR A NUMBER OF HOT AND COLD FLUIDS IS APPROACHED FROM THE VIEWPOINT OF THE SECOND LAW OF THERMODYNAMICS. IF THE TOTAL DUTY REQUIREMENTS ARE FIXED THEN THE RESULTING ENTROPY PRODUCTION RATE IS INDEPENDENT OF THE ACTUAL PAIRINGS OF THE FLUIDS. THUS, OPTIMIZATION WITH RESPECT TO SIZE BECOMES ESSENTIALLY A MAXIMIZATION OF THE TEMPERATURE DIFFERENCES BETWEEN THE PAIRED FLUIDS FOR ALL OF THE FLUIDS CONSIDERED. THE SAME OPTIMIZATION CAN BE OBTAINED FROM THE LOAD CURVES WHERE THE TEMPERATURE IS PLOTTED AGAINST THE HEAT TRANSFER FOR EACH OF THE FLUIDS. IF THE FILM COEFFICIENT FOR ANY OF THE FLUIDS IS SIGNIFICANTLY DIFFERENT FROMTHE OTHERS, A SIMPLE SHIFTING CAN BE ACCOMPLISHED AND A CRITERION IS GIVEN TO DETERMINE IF SUCH SHIFTING IMPROVES THE OPTIMIZATION.

Details

  • Original title: SECOND-LAW-BASED OPTIMIZATION OF HEAT EXCHANGER NETWORKS USING LOAD CURVES.
  • Record ID : 1987-0083
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 29 - n. 8
  • Publication date: 1986/08

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