论文信息 - Systematic energy relaxation in MER heat exchanger networks

Systematic energy relaxation in MER heat exchanger networks

Abstract The pinch-design method can efficiently generate a network which satisfies the utilities target for a given value of the minimum-approach temperature difference. However, this design normally contains more than the minimum number of heat-exchanger units. Loop-breaking and energy relaxation may be used to eliminate these additional units—the well-known capital-energy tradeoff. At each stage of loop-breaking, it has been recommended that the unit with the smallest heat load be removed. This study shows that blind application of such a simple heuristic can lead to suboptimal designs with respect to energy consumption, because such a simple heuristic ignores loop—network interactions. Analysis of loops in the context of the overall network identifies constrained exchangers and often reveals those exchangers which are the most suitable candidates for deletion. With such insights, loop-breaking can be carried out appropriately with consequent minimal increase in energy consumption.

R. M. Wood | J. R. Roach | Brian O'Neill | K. K. Trivedi

[1] John R. Flower,et al. A thermodynamic‐combinatorial approach to the design of optimum heat exchanger networks , 1980 .

[2] R. L. Motard,et al. Evolutionary synthesis of heat-exchanger networks , 1984 .

[3] Arthur W. Westerberg,et al. THE SYNTHESIS AND EVOLUTION OF NETWORKS OF HEAT EXCHANGE THAT FEATURE THE MINIMUM NUMBER OF UNITS , 1982 .

[4] T. J. Kotas,et al. Exergy Method of thermal and chemical plant analysis , 1986 .

[5] Christodoulos A. Floudas,et al. Automatic synthesis of optimum heat exchanger network configurations , 1986 .

[6] H. P. Hutchison,et al. The analysis of chemical plant flowsheets , 1969 .

[7] Simon A. Jones. Methods for the generation and evaluation of alternative heat exchanger networks , 1987 .

[8] B. Linnhoff,et al. The pinch design method for heat exchanger networks , 1983 .

[9] L. Naess,et al. The synthesis of cost optimal heat exchanger networks. An industrial review of the state of the art , 1988 .

[10] Arthur W. Westerberg,et al. A review of process synthesis , 1981 .

[11] Norman E. Gibbs,et al. A Cycle Generation Algorithm for Finite Undirected Linear Graphs , 1969, JACM.

[12] Y. A. Liu,et al. STUDIES IN CHEMICAL PROCESS DESIGN AND SYNTHESIS: VI. A THERMOECONOMIC APPROACH TO THE EVOLUTIONARY SYNTHESIS OF HEAT EXCHANGER NETWORKS† , 1984 .