Heat-exchanger network synthesis

Cerda, J., Westerberg, A. W., Mason, D., and Linnhoff, B., Minimum Utility Usage in Heat Exchanger Network Synthesis—A Transportation Problem, Chem. Eng. ScL, 38 373 1983. 

Wood, R. M., Wilcox, R. J., Euid Grossmann, I. E., A Note on the Minimum Number of Units for Heat Exchanger Network Synthesis, Chem. Eng. Commun., 39 371, 1985. 

Combinatorial. Combinatorial methods express the synthesis problem as a traditional optimization problem which can only be solved using powerful techniques that have been known for some time. These may use total network cost direcdy as an objective function but do not exploit the special characteristics of heat-exchange networks in obtaining a solution. Much of the early work in heat-exchange network synthesis was based on exhaustive search or combinatorial development of networks. This work has not proven useful because for only a typical ten-process-stream example problem the alternative sets of feasible matches are cal.55 x 10 without stream spHtting. 

The eadiest use of heat-exchange network synthesis was in the analysis of cmde distillation (qv) units (1). The cmde stream entering a distillation unit is a convenient single stream to heat while the various side draws from the column are candidate streams to be cooled in a network. So-called pumparounds present additional opportunities for heating the cmde. The successful synthesis of cmde distillation units was accompHshed long before the development of modem network-synthesis techniques. However, the techniques now available ensure rapid and accurate development of good cmde unit heat-exchange networks. 

R. A. Greenkorn, L. B. Koppel, and S. Raghavan, "Heat Exchanger Network Synthesis—A Thermodynamic Approach," 71 stAlChE Meeting, Miami, Fla., 1978. 

K. C. Hohmann and F. J. Lockhart, "Optimum Heat Exchanger Network Synthesis," AICHE 82nd National Meeting, Adantic City, N.J., 1976. 

J. J. Siirola, "Status of Heat Exchanger Network Synthesis," AIChE National Meeting, Tulsa, OHa., 1974. 

Shenoy, U. V. (1995). Heat Exchange Network Synthesis Process Optimization by Energy and Resource Analysis. Gulf Phb. Co., Houston, TX. 

Siirola, J. J. (1974) AIChE 76th National Meeting, Tulsa, Oklahoma. Studies of heat exchanger network synthesis. 

At the conceptual stage for heat exchanger network synthesis, the calculation of heat transfer coefficients and pressure drops should depend as little as possible on the detailed geometry. However, some assumptions must be made regarding the geometry. 

Cerda J, Westerberg AW, Mason D and Linnhoff B (1983) Minimum Utility Usage in Heat Exchanger Network Synthesis - A Transportation Problem, Chem Eng Sci, 38 373. 

Zhu XX, O Neill BK, Roach JR and Wood RM (1995) New Method for Heat Exchanger Network Synthesis Using Area Targeting Procedures, Comp Chem Eng, 19 197. 

At the conceptual stage for heat exchanger network synthesis, the calculation of heat transfer coefficient and pressure drop should depend as little as possible on the detailed geometry. Simple models will be developed in which heat transfer coefficient and pressure drop are both related to velocity1. It is thus possible to derive a correlation between the heat transfer coefficient, pressure drop and the surface area by using velocity as a bridge between the two1. 

Athier, G. P. Roquet L. Pibouleau et al. Process Optimization by Simulated Annealing and NLP Procedures. Application to Heat Exchanger Network Synthesis. Comput Chem Eng 21 (Suppl) S475-S480 (1997). 

Ciric, A. R. and C. A. Floudas. Heat Exchanger Network Synthesis Without Documentation. Comput Chem Eng 15 385-396 (1991). 

Gunderson, T. and I. E. Grossmann. Improved Optimization Strategies for Automated Heat Exchanger Network Synthesis Through Physical Insights. Comput Chem Eng 14 925-944 (1990). 

J. Cerda and A. W. Westerberg, Minimum Utility Usage in Heat Exchanger Network Synthesis-El Transportation Problem, DRC Report No. 06-16-80, Camegie-Mellon University, Pittsburgh, Pa., 1980. 

Colberg, R. D., Morari, M., and Townsend, D. W., A resilience target for heat exchanger network synthesis. Comp. Chem. Eng., in press (1988). 

Raghavan, S., Heat exchanger network synthesis a thermodynamic approach. Ph.D. thesis, Purdue Univ. (1977). 

Saboo, A. K., and Morari, M., Design of resilient processing plants—IV. Some new results on heat exchanger network synthesis. Chem. Eng. Sci. 39, 579 (1984). 

Heat Exchanger Network Synthesis Gundersen and Naess (1988)... 

Remark 1 Note that the borderlines between the three main approaches are not necessarily distinct. For instance, the targets in (ii) can be viewed as heuristics or rales that simplify the combinatorial problem and allow for its decomposition into smaller, more tractable problems (see chapter on heat exchanger network synthesis via decomposition approaches). The optimization approach (iii) can formulate thermodynamic targets, or targets on the attainable region of reaction mechanisms as optimization models, and can either utilize them so as to decompose the large-scale problem or follow a simultaneous approach that treats the full-scale mathematical model. The first... 

This chapter focuses on heat exchanger network synthesis approaches based on optimization methods. Sections 8.1 and 8.2 provide the motivation and problem definition of the HEN synthesis problem. Section 8.3 discusses the targets of minimum utility cost and minimum number of matches. Section 8.4 presents synthesis approaches based on decomposition, while section 8.5 discusses simultaneous approaches. 

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