240--Approximate Sizing of Shell-and-Tube Heat Exchangers

doi:10.1615/hedhme.a.000240

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Oblate spheroids, free convective heat transfer from, Ocean Thermal Energy Conversion (OTEC), Octadecane: Octadecene: Octane: 1-Octanol: 1-Octene: Octafluorocyclobutane (Refrigerant C318) OEST, heat transfer medium, Oldroyd eight constant model, for non-Newtonian fluid, Olefins: Oliviera, S Olex, heat transfer medium, ONB (onset of nucleate boiling): Once-through cooling towers, Once-through multistage flash evaporators, (MSF-OT) One-equation models, for turbulent boundary layers, Open-circuit cooling towers, Operational envelope of a heat pipe, Operational problems: Opposed convection: Opto-microfluidics, Organic compounds, aqueous solutions of, as heat transfer media, Organic solids, density, Organic sulfur compounds: Organic vapours, dropwise condensation of, Orifices: Orifice baffles, in tube bundles with longitudinal flow, Orrick and Erbar method for saturated liquid viscosity, Outer tube limit, in shell-and-tube heat exchangers, Outlet effects, in shell-and-tube heat exchangers, Overall heat transfer coefficient,

approximate values: in shell-and-tube heat exchangers,

Approximate Method in liquid metal heat exchangers,

Overall power hypothesis, for critical heat flux in flow boiling, Overcapacity, in condensers, Oxygen:

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A B C D E F G H I J K L M N O

Oblate spheroids, free convective heat transfer from, Ocean Thermal Energy Conversion (OTEC), Octadecane: Octadecene: Octane: 1-Octanol: 1-Octene: Octafluorocyclobutane (Refrigerant C318) OEST, heat transfer medium, Oldroyd eight constant model, for non-Newtonian fluid, Olefins: Oliviera, S Olex, heat transfer medium, ONB (onset of nucleate boiling): Once-through cooling towers, Once-through multistage flash evaporators, (MSF-OT) One-equation models, for turbulent boundary layers, Open-circuit cooling towers, Operational envelope of a heat pipe, Operational problems: Opposed convection: Opto-microfluidics, Organic compounds, aqueous solutions of, as heat transfer media, Organic solids, density, Organic sulfur compounds: Organic vapours, dropwise condensation of, Orifices: Orifice baffles, in tube bundles with longitudinal flow, Orrick and Erbar method for saturated liquid viscosity, Outer tube limit, in shell-and-tube heat exchangers, Outlet effects, in shell-and-tube heat exchangers, Overall heat transfer coefficient,

approximate values: in shell-and-tube heat exchangers,

Approximate Method in liquid metal heat exchangers,

Overall power hypothesis, for critical heat flux in flow boiling, Overcapacity, in condensers, Oxygen:

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Approximate Sizing of Shell-and-Tube Heat Exchangers

DOI 10.1615/hedhme.a.000240

3.1 INTRODUCTION TO HEAT EXCHANGER DESIGN
3.1.4 Approximate sizing of shell-and-tube heat exchangers

Kenneth J. Bell

In the previous section, the need for a preliminary estimate of the heat exchanger size and configuration was indicated. This estimate is essential for a hand design method and useful for a computer design. Additionally, there are occasions - preliminary estimates of plant cost, layout, and space requirements, for example - when a good approximate size estimate is sufficient and more quickly available than a detailed design. Eventually, if the plant is to be built, the detailed calculations will have to be done, but that task can profitably wait until the preliminary studies have ascertained if the plant looks economically promising and have given a definite idea of how the components are to be arranged.

In this section, a preliminary design method is presented in some detail. This method covers many of the usual process applications for shell-and-tube exchangers, and it can be extended with care and insight to other cases. The accuracy of the method is strongly dependent on the skill of the user in estimating or selecting appropriate heat transfer coefficient values; in this there is no substitute for experience, although Table 2 may be helpful.

A. The basic design equation

The basic design equation to be used in this section is

\[\label{eq3.1.1(8)} A_{0}=\dfrac{Q_{T}}{U_{0}F\Delta T_{LM}}=\dfrac{Q_{T}}{U_{0}\Delta T_{M}} \tag{3.1.1(8)}\]

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