Heat exchanger configurations

In a counterflow or countercurrent heat exchanger, hot and cold fluids enter the exchanger from opposite sides. The counterflow heat exchanger in Fig. 9.5 serves as a reference for all other heat exchanger configurations. A detailed analysis of this type of heat exchanger is therefore necessary. 

Given the large variety of process heat transfer problems and the heat exchanger configurations available, the engineer must select a type and design that satisfy several criteria. These are listed approximately in the order of their importance, though in any individual case one criterion or another may move up or down in the list of relative importance. 

Comparison between Co-Current-Flow and Counter-Current-Flow Heat Exchangers. The worked examples reported below will demonstrate the different efficiencies of the two heat exchanger configurations in terms of the heat transfer area required in both cases for the same U. Let us consider two fluids between which heat is being... 

Fig. 10-18 Examples of compaci heat-exchanger configurations according to Ref. 3.

Other types of heat-exchanger configurations not illustrated here are sometimes used. Curves for determining the value of F for these are presented in Ref. 11. These configurations include divided-flow and split-flow exchangers. 

Equation (5-32) applies to both counterflow and parallel flow exchangers with the nomenclature defined in Fig. 5-5. Correction factors to A7) for various heat exchanger configurations are given in Sec. 11. 

FIGURE 6.38 Cutaway view of a brazed aluminum plate fin (or matrix) heat exchanger configured for three streams. (Courtesy Chart Energy and Chemicals, Inc., La Crosse, WI, a wholly owned subsidiary of Chart Industries, Cleveland, OH.)... 

If certain assumptions are made, Equation (6.104) can be analytically integrated for a number of important heat-exchanger configurations and applications. The following set of assumptions is reasonably valid for many cases ... 

The mean temperature difference formulation may be extended to many heat-exchanger configurations that are neither purely countercurrent nor purely cocurrent. As noted in Section... 

The same reaction can be performed in a multitubular reactor (with a shell-and-tube heat exchanger configuration). Two possibilities exist the reactant is on the tube side or on the shell side. Both are considered below. 

The offset-strip-fin compact heat exchanger configuration has also been suggested for OTEC condensers. The flow situation is similar to that of the evaporator noted in Fig. 11.19. A... 

L. Goldstein Jr. and E. M. Sparrow, Experiments on the Transfer Characteristics of a Corrugated Fin and Tube Heat Exchanger Configuration, J. Heat Transfer (98) 26-34,1976. 

Figure 10.43 Two-effect distillation (a) tower and heat exchanger configuration (b) T-Q diagram.

If one or both of the streams undergoes isothermal condensation or boiling, the specific heats are constant, and the above assumptions 1, 3, and 5 apply, the log-mean temperature difference applies to all heat exchanger configurations, including multiple tube- or shell-pass arrangements. 

Myrstad, R., Holmen, A., Pfeifer, P., and Venvik, H.J. (2013) Characteristics of integrated micro packed bed reactor-heat exchanger configurations in the 18. 

The propeller loop reactor with internal draft tube cum heat exchanger configuration has also been used by the author for an extremely exothermic (almost explosive) solid-liquid reaction ... 

Tradeoffs occur in the selection of tube size, thickness, and material, as well as heat exchanger configuration. For example, larger tube diameters increase turbulence for a... 

This chapter has highlighted the principal layout requirements for the heat exchanger configurations... 

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