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Hagen-Poiseuille law
Hagen-Rubens relation, between electrical and optical constants,
Hall Taylor, N S,
Halogenated hydrocarbons:
Handley and Heggs equation for fixed bed pressure drop,
Hankinson and Thomson method, for liquid density:
Hardening (precipative) of stainless steels,
Hardwick, R,
Harris, D,
Hausen equation for developing laminar flow,
Hays, G F
Headers in shell-and-tube heat exchangers,
Heads, in heat exchangers:
Heat and mass transfer:
Heat exchanger design, introduction,
Heat exchangers:
Heat of vaporisation (see Enthalpy of vaporisation), of pure substances
Heat pipes:
Heat pumping, relation to heat exchanger network design,
Heat storage (see Regenerators and thermal energy storage) entropy generation in,
Heat transfer:
Heat transfer coefficient:
Heat transfer media,
Heat transfer salt,
Heat transfer regimes:
Heat of vaporization,
Heated cavity reflectometer,
Heating media, for reboilers,
Heavy water, physical properties of,
Heggs, P J,
Helical coils of circular cross section:
Helical coils of rectangular cross section,
Helical inserts, for enhancement of heat transfer in boiling,
Helium:
Helmholtz reciprocity principle, in radiative heat transfer,
Henry, J A R,
Henry-Fauske model, for critical two-phase flow,
Henry's law, for partial pressure,
Heptadecane:
Heptadecene:
Heptane:
1-Heptanol:
1-Heptene:
Herman, K W,
Hermes, C L L,
Heterogeneous conveyance in horizontal pipes,
Heterogeneous nucleation in boiling,
Hewitt, G F
Hexachloroethane (Refrigerant 116):
Hexacyclopentane, superheated vapor properties,
Hexadecane:
Hexadecene:
1,5-Hexadiene:
Hexagonal cells, in free convection,
Hexamethylbenzene:
Hexane:
Hexanoic acid:
1-Hexanol:
1-Hexene:
Hexylbenzene:
Hexylcyclohexane:
Hexylcyclopentane,
Hicks equation, for fixed-bed pressure drop,
High pressure closures, ASME VIII code guidance for,
High-chrome steels, thermal and mechanical properties,
High-finned tubes, correlations for single-phase heat transfer in flow over,
Hills, P D
Hohlraum cavity,
Holdup, in liquid-liquid flow,
Holland, guide to national practice for mechanical design of heat exchangers,
Homogeneous condensation (fog formation),
Homogeneous model:
Homogeneous nucleation:
Honeycombs:
Hopkins, D,
Horizontal condensers:
Horizontal cylinders:
Horizontal layers, of fluid, free convection heat transfer in,
Horizontal pipes:
Horizontal shell-side evaporator,
Horizontal surfaces:
Horizontal thermosiphon reboilers:
Horizontal tube-side evaporator,
Horizontal tubes:
Hottel's rule, in absorption of radiation by gases,
Hsu criterion, for onset of nucleate boiling,
Hybrid cooling towers,
Hydraulic conveyance:
Hydraulic expansion, of tubes into tube sheets in shell-and-tube heat exchangers,
Hydraulic turbine, lost work in,
Hydraulic resistance, in flow of supercritical fluids,
Hydraulically smooth surface,
Hydrazine:
Hydrocarbons:
Hydrodynamic entrance length, in single-phase flow in ducts,
Hydrogen:
Hydrogen bromide:
Hydrogen chloride:
Hydrogen cyanide:
Hydrogen fluoride:
Hydrogen iodide:
Hydrogen peroxide:
Hydrogen sulfide:
Hydrostatic testing of shell-and-tube heat exchangers,
Hysteresis:
Index
HEDH
A
B
C
D
E
F
G
H
Hagen-Poiseuille law
Hagen-Rubens relation, between electrical and optical constants,
Hall Taylor, N S,
Halogenated hydrocarbons:
Handley and Heggs equation for fixed bed pressure drop,
Hankinson and Thomson method, for liquid density:
Hardening (precipative) of stainless steels,
Hardwick, R,
Harris, D,
Hausen equation for developing laminar flow,
Hays, G F
Headers in shell-and-tube heat exchangers,
Heads, in heat exchangers:
Heat and mass transfer:
Heat exchanger design, introduction,
Heat exchangers:
Heat of vaporisation (see Enthalpy of vaporisation), of pure substances
Heat pipes:
Heat pumping, relation to heat exchanger network design,
Heat storage (see Regenerators and thermal energy storage) entropy generation in,
Heat transfer:
Heat transfer coefficient:
Heat transfer media,
Heat transfer salt,
Heat transfer regimes:
Heat of vaporization,
Heated cavity reflectometer,
Heating media, for reboilers,
Heavy water, physical properties of,
Heggs, P J,
Helical coils of circular cross section:
Helical coils of rectangular cross section,
Helical inserts, for enhancement of heat transfer in boiling,
Helium:
Helmholtz reciprocity principle, in radiative heat transfer,
Henry, J A R,
Henry-Fauske model, for critical two-phase flow,
Henry's law, for partial pressure,
Heptadecane:
Heptadecene:
Heptane:
1-Heptanol:
1-Heptene:
Herman, K W,
Hermes, C L L,
Heterogeneous conveyance in horizontal pipes,
Heterogeneous nucleation in boiling,
Hewitt, G F
Hexachloroethane (Refrigerant 116):
Hexacyclopentane, superheated vapor properties,
Hexadecane:
Hexadecene:
1,5-Hexadiene:
Hexagonal cells, in free convection,
Hexamethylbenzene:
Hexane:
Hexanoic acid:
1-Hexanol:
1-Hexene:
Hexylbenzene:
Hexylcyclohexane:
Hexylcyclopentane,
Hicks equation, for fixed-bed pressure drop,
High pressure closures, ASME VIII code guidance for,
High-chrome steels, thermal and mechanical properties,
High-finned tubes, correlations for single-phase heat transfer in flow over,
Hills, P D
Hohlraum cavity,
Holdup, in liquid-liquid flow,
Holland, guide to national practice for mechanical design of heat exchangers,
Homogeneous condensation (fog formation),
Homogeneous model:
Homogeneous nucleation:
Honeycombs:
Hopkins, D,
Horizontal condensers:
Horizontal cylinders:
Horizontal layers, of fluid, free convection heat transfer in,
Horizontal pipes:
Horizontal shell-side evaporator,
Horizontal surfaces:
Horizontal thermosiphon reboilers:
Horizontal tube-side evaporator,
Horizontal tubes:
Hottel's rule, in absorption of radiation by gases,
Hsu criterion, for onset of nucleate boiling,
Hybrid cooling towers,
Hydraulic conveyance:
Hydraulic expansion, of tubes into tube sheets in shell-and-tube heat exchangers,
Hydraulic turbine, lost work in,
Hydraulic resistance, in flow of supercritical fluids,
Hydraulically smooth surface,
Hydrazine:
Hydrocarbons:
Hydrodynamic entrance length, in single-phase flow in ducts,
Hydrogen:
Hydrogen bromide:
Hydrogen chloride:
Hydrogen cyanide:
Hydrogen fluoride:
Hydrogen iodide:
Hydrogen peroxide:
Hydrogen sulfide:
Hydrostatic testing of shell-and-tube heat exchangers,
Hysteresis:
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
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Headers, Nozzles and Turnarounds
DOI 10.1615/hedhme.a.000149
2.2.7 Headers, nozzles, and turnarounds
J. A. R. Henry
Introduction
The prime purpose of nozzles, headers, and turnarounds is to distribute fluid through a heal exchanger matrix, as shown in Figure 1 for a typical case.
The indirect purpose of these components, in common with the others making up the structure, is lo contain the process fluids, which may be under high pressure. Hence, although their prime function is to direct and distribute flow, it is often found that their design is dictated by strength, cheapness, or ease of manufacture, rather than by considerations of fluid dynamics. In many instances this approach results in poor distribution of the fluid within the heat exchanger.
Poor distribution may or may not result in unsatisfactory performance, which in the past has usually been of secondary importance. However, with the increasing cost of energy and materials, it is desirable to utilize equipment to maximum efficiency during its lifetime. This requires a balanced performance, one aspect of which is achieving more uniform flow distribution. Associated with this is the need to predict pressure drop with some accuracy.
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