Exchanger configurations

Care must be taken that does not vaiy too strongly, that the proper equations and conditions are chosen for calculating the individual coefficients, and that the mean temperature difference is the correct one for the specified exchanger configuration. 

Figure 4. Common shell-and-tube 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. 

Calculate the total heat transferred to the process fluid check against the required value. The adjustments required may result in a new exchanger configuration and a new calculation of circulation rate. 

A provisional design is obtained based upon the known physical parameters and typical exchanger configurations. Standard pipe/... 

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. 

PRESSURES-EXCHANGER CONFIGURATION-FLUID PROPERTIES-FOUUNG FACTORS-... 

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