394--Experimental Studies: Major Results Useful for Heat Exchanger Design

doi:10.1615/hedhme.a.000394

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Damage, sources of heat exchangers Damkohler number: Damping: Davis and Anderson criterion, for onset of nucleate boiling, Decal, heat transfer medium, Decane: 1-Decanol: 1-Decene: Degradation temperature, of polymers, Demisters, wire mesh, for multistage flash evaporators, Dengler and Addoms correlation, for forced convective heat transfer in two-phase flow, Density: Deposition of droplets in annular flow Deposition in fouling, Desalination plants: Desuperheaters for use in association with evaporators, Developing flow in ducts: Dew-poin corrosion, Diathermanous fluid, 1,1-Dibromoethane: Dibromomethane: 1,2-Dibromotetrafluoroethane (Refrigerant 114B2): Dibutylamine: Dibutyl ether: Dichloroacetic acid: o-Dichlorobenzene: Dichlorodifluoromethane (see Refrigerant 12) 1,1-Dichloroethane (Refrigerant 150a): 1,2-Dichloroethane (Refrigerant 150): 1,1-Dichloroethylene: cis-1,2-Dichloroethylene: trans-1,2-Dichloroethylene: Dichlorofluoromethane (see Refrigerant 21) Dichloromethane (Refrigerant 30): 1,2-Dichlorotetrafluoroethane (Refrigerant 114) 1,2,3-Dichlorotrifluoroethane (Refrigerant 123) Dielectric constant, of water, Diethylamine: n,n-Diethylaniline: Diethylene glycol: Diethyl ether: Diethyl ketone: Diethylsulfide: Differential condensation: Differential formulations for nonisothermal gas radiation, Differential resistance term in heat exchanger design, Differential vector operators in heat conduction, Diffraction models for radiative heat transfer from surfaces, Diffuse surfaces, radiative heat transfer between, Diffuse wall passages, radiative heat transfer in, Diffusers, single-phase flow and pressure drop in, Diffusion, in multi-component condensation, n,n-Diffusion coefficients: 1,1-Difluoroethane (Refrigerant 152a): Difluoromethane (Refrigerant 32): Diiodomethane: Diisobutylamine: Diisopropylamine: Diisopropylether: Dimensional analysis: Dimensionless groups: Dimethylacetylene: Dimethylamine: Dimethylaniline: 2,2-Dimethylbutane: 2,3-Dimethylbutane: 1,1-Dimethylcyclopentane: Dimethylether: Dimethylketone: 2,2-Dimethylpropane (neopentane): Dimethylsulfide: Dimpled surfaces, heat exchangers with,

Introduction: Dimpled Surfaces for Heat Exchangers It's an article introduction to, experimental studies of,

Experimental Studies: Major Results Useful for Heat Exchanger Design It's an article critical heat flux (CHF) in, in cross flow, plate geometries, tubular geometries,

Experimental Studies: Major Results Useful for Heat Exchanger Design It's an article

industrial applications of, numerical simulation of, vortex heat transfer enhancement in, vortex formation models in,

1,4-Dioxane: Diphenyl: Diphenylamine: Diphenylether: Diphenylmethane: Dipropyl ether: Diisopropyl ether: Dipropyl ketone: Direct contact heat exchangers Direct contact heat transfer, Direct numerical simulation, of turbulence, Dirichlet boundary condition, finite difference method, Dished heads: Discretization in numerical analysis: Disk-and-doughnut baffled heat exchangers, Disks, free convective heat transfer from inclined, Dispersants, for fouling control, Dispersed flow (liquid-liquid), Dissipation of turbulent energy, Distillation: Distribution: Dittus-Boelter equation, for single-phase forced convective heat transfer, Dividing flow, loss coefficients in, Dodecane: 1-Dodecene: Donohue method, for shell-side heat transfer in shell-and-tube heat exchangers, Double-pipe heat exchangers: Double segmental baffled heat exchangers, Downward facing surfaces, free convective heat transfer from, Downward flow in vertical tubes, flow patterns in gas/liquid, Dowtherm A: Dowtherm J: Dowtherms, as heat transfer media, Drag coefficient: Drag force: Drag reduction, Drainage, of condensate, Dreitser, G, Drift flux model for two-phase flows, Drogemuller, P, Droplets: Dropwise condensation Dry wall desuperheating (in condensation), Dryers: Drying loft, Drying rates, prediction of, Dryout: Ducts, single-phase fluid flow and pressure drop in, Duplex stainless steels, Durand correlation for heterogeneous conveyance in solid/liquid flow, Dynamically stable foam, Dyphyl, heat transfer media, Dzyubenko, B,

Index

HEDH

A B C D

Introduction: Dimpled Surfaces for Heat Exchangers It's an article introduction to, experimental studies of,

Experimental Studies: Major Results Useful for Heat Exchanger Design It's an article critical heat flux (CHF) in, in cross flow, plate geometries, tubular geometries,

Experimental Studies: Major Results Useful for Heat Exchanger Design It's an article

industrial applications of, numerical simulation of, vortex heat transfer enhancement in, vortex formation models in,

E F G H I J K L M N O P Q R S T U V W X Y Z

D Dimpled surfaces, heat exchangers with, experimental studies of, tubular geometries,

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Experimental Studies: Major Results Useful for Heat Exchanger Design

DOI 10.1615/hedhme.a.000394

3.25.4 Experimental studies: major results useful for heat exchanger design

Y. Chudnovsky and A. Kozlov

Detailed analysis of the numerous experimental studies related to the Vortex Heat Transfer Enhancement (VHTE) is beyond this handbook chapter, so only the most useful results for heat exchanger design will be considered here.

A. Flow in plate geometries

Figure 1 illustrates the heat transfer and flow friction on the dimpled plates in the subsonic range of flow velocity. The presented results were obtained for both shallow (h/D < 0.1) and deep (h/D > 0.2) dimples in three values of dimpled density (25%, 50% and 75%) on the test plates.

Figure 1 Heat transfer and friction flow on the dimpled plate (Afanasiev et al., 1993) and test samples

The results (Afanasiev et al., 1993) demonstrated a cost-effective possibility to reach moderate heat transfer enhancement (35–40%) on a flat plate without any significant increase in frictional drag.

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