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Ideal gas: Ilexan, heat transfer medium, Illingworth, A, Imbedded fins, Immersed bodies: Immersed tubes, in fluidized beds, heat transfer to, Immiscible liquids, condensation of vapors producing Impairment of heat transfer in combined free and forced convection in a vertical pipe, Imperfectly diffuse surfaces: Impingement damage in heat exchangers, Impingement plate: Impingement protection, in shell-and-tube heat exchangers, Impinging jets: Implicit equations, solution of Inclined enclosures, free convective heat transfer in, Inclined flow, effect of on heat transfer to cylinders, Inclined pipes: Inclined surfaces, free convective heat transfer from, Inconel, spectral characteristics of reflectance from oxidized surface of, Induced flow instabilities, in augmentation of heat transfer, Injection: Inlet effects in shell-and-tube heat exchangers, In-line tube banks: Inorganic compounds, solutions of, as heat transfer media, Inorganic substances: Instability, parallel channel, in condensers, Insulators, thermal conductivity of, Integral condensation: Integral finned tubes: Interaction coefficients in heat exchangers,
Types of interactions between streams
Interaction parameters for binary systems, tables, Interfacial friction, in three-phase (liquid-liquid-gas) stratified flows, Interfacial resistance, in condensation, Interfacial roughness, relationships for, in annular gas-liquid flow, Interfacial shear stress, effect on filmwise condensation, on vertical surface, Intergrannular corrosion, of Intermating troughs, as corrugation design in plate heat exchangers, Intermittent flows: Internal heat sources, temperature distribution in bodies with, Internal heat transfer coefficient, use in transient conduction calculations, Internal reboilers (in distillation columns), characteristics advantages and disadvantages of, Internally finned tubes: International codes for pressure vessels, Interpenetrating continua (as representation of heat exchangers): Intertube velocity, in tube banks, Inviscid flow, compressible, with heat addition, Iodine: Iodobenzene: Iodoethane: Iodomethane: ISO codes for mechanical design of heat exchangers, Isobutane: Isobutanol: Isobutylamine: Isobutylformate: Isobutyric acid: Isoparaffins: Isopentane: Isopentanol: Isopropanol: Isopropylacetate: Isopropylamine: Isopropylbenzene: Isopropylcyclohexane: Isothermal flow, compressible, in ducts, Isothermal gas, radiation heat transfer to walls from, Isotropic materials, elastic properties, Isotropic scattering, Italy, guide to national practice for heat exchanger mechanical design,

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A B C D E F G H I
Ideal gas: Ilexan, heat transfer medium, Illingworth, A, Imbedded fins, Immersed bodies: Immersed tubes, in fluidized beds, heat transfer to, Immiscible liquids, condensation of vapors producing Impairment of heat transfer in combined free and forced convection in a vertical pipe, Imperfectly diffuse surfaces: Impingement damage in heat exchangers, Impingement plate: Impingement protection, in shell-and-tube heat exchangers, Impinging jets: Implicit equations, solution of Inclined enclosures, free convective heat transfer in, Inclined flow, effect of on heat transfer to cylinders, Inclined pipes: Inclined surfaces, free convective heat transfer from, Inconel, spectral characteristics of reflectance from oxidized surface of, Induced flow instabilities, in augmentation of heat transfer, Injection: Inlet effects in shell-and-tube heat exchangers, In-line tube banks: Inorganic compounds, solutions of, as heat transfer media, Inorganic substances: Instability, parallel channel, in condensers, Insulators, thermal conductivity of, Integral condensation: Integral finned tubes: Interaction coefficients in heat exchangers,
Types of interactions between streams
Interaction parameters for binary systems, tables, Interfacial friction, in three-phase (liquid-liquid-gas) stratified flows, Interfacial resistance, in condensation, Interfacial roughness, relationships for, in annular gas-liquid flow, Interfacial shear stress, effect on filmwise condensation, on vertical surface, Intergrannular corrosion, of Intermating troughs, as corrugation design in plate heat exchangers, Intermittent flows: Internal heat sources, temperature distribution in bodies with, Internal heat transfer coefficient, use in transient conduction calculations, Internal reboilers (in distillation columns), characteristics advantages and disadvantages of, Internally finned tubes: International codes for pressure vessels, Interpenetrating continua (as representation of heat exchangers): Intertube velocity, in tube banks, Inviscid flow, compressible, with heat addition, Iodine: Iodobenzene: Iodoethane: Iodomethane: ISO codes for mechanical design of heat exchangers, Isobutane: Isobutanol: Isobutylamine: Isobutylformate: Isobutyric acid: Isoparaffins: Isopentane: Isopentanol: Isopropanol: Isopropylacetate: Isopropylamine: Isopropylbenzene: Isopropylcyclohexane: Isothermal flow, compressible, in ducts, Isothermal gas, radiation heat transfer to walls from, Isotropic materials, elastic properties, Isotropic scattering, Italy, guide to national practice for heat exchanger mechanical design,
J K L M N O P Q R S T U V W X Y Z
I Interaction coefficients in heat exchangers,
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Types of interactions between streams

DOI 10.1615/hedhme.a.000089

1.1 DESCRIPTION OF HEAT EXCHANGER TYPES
1.1.2 Types of Interactions between Streams

D. Brian Spalding

A. HEAT TRANSFER

Heat transfer is an energy interaction that occurs between materials by reason of the temperature difference between them. It is the most common type of interaction in heat exchange equipment, and it has pride of place in this handbook.

Heat transfer between the streams is usually effected indirectly: the streams are separated by a solid material, such as a metal tube wall or plate, or even a plastic membrane, and the heat passes from the first fluid through the solid material to the second fluid. The consequences of the heat transfer are often local increases in the temperature of the cooler fluid and decreases in that of the warmer fluid; they may also entail the change of phase of one or both fluids.

Heat transfer can also take place when the fluids are in direct contact, for example, when one fluid is warm water and the other is cool air. Direct-contact heat transfer is very common when the cooling water of a steam power station is to be cooled in its turn. The relevant heat exchange device is then usually called a cooling tower.

Sometimes a cloud of solid particles exchanges heat with a stream of fluid. In a fluidized-bed heat exchanger, a hot gas may pass upward through a dense cloud of solid particles that, although they are in violent motion of a semirandom character, are prevented by gravity from rising with the gas. These particles impinge on, and transfer heat to, solid surfaces (for example, cooling water tubes) that pass through the bed.

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