Navigation by alphabet
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Nahme-Griffith number,
Nakashima, CY
Nanoparticles, for heat transfer augmentation,
Naphthalene:
Napthenes:
National practice, in mechanical design, guide to,
Natural convection:
Natural draft cooling towers:
Natural frequency of tube vibration in heat exchangers,
Navier-Stokes equation,
Neon:
Neopentane:
Net free area, in double-pipe heat exchangers,
Netherlands, guide to national mechanical design practice,
Networks, of heat exchangers, pinch analysis method for design of,
Neumann boundary conditions, finite difference method,
Nickel, thermal and mechanical properties
Nickel alloys,
Nickel steels,
Niessen, R,
Nitric oxide:
Nitriles:
Nitrobenzene:
Nitro derivatives:
Nitroethane:
Nitrogen:
Nitrogen dioxide:
Nitrogen peroxide:
Nitromethane:
m-Nitrotoluene:
Nitrous oxide
Noise:
Nonadecane:
Nonadecene:
Nonane:
Nonene:
Nonanol:
Nonaqueous fluids, critical heat flux in,
Non-circular microchannels:
Noncondensables:
Nondestructive testing, of heat exchangers
Nongray media, interaction phenomena with,
Nonmetallic materials:
Non-Newtonian flow:
Nonparticipating media, radiation interaction in,
Nonuniform heat flux, critical heat flux with,
Non-wetting surfaces, in condensation augmentation,
North, C,
No-tubes-in-window shells, calculation of heat transfer and pressure drop in,
Nozzles:
Nowell, D G,
Nucleate boiling:
Nuclear industry, fouling problems in,
Nucleation:
Nucleation sites:
Nuclei, formation in supersaturated vapor,
Number of transfer units (NTU):
Numerical methods:
Nusselt:
Nusselt-Graetz problem, in laminar heat transfer in ducts,
Nusselt number:
Index
HEDH
A
B
C
D
E
F
G
H
I
J
K
L
M
N
Nahme-Griffith number,
Nakashima, CY
Nanoparticles, for heat transfer augmentation,
Naphthalene:
Napthenes:
National practice, in mechanical design, guide to,
Natural convection:
Natural draft cooling towers:
Natural frequency of tube vibration in heat exchangers,
Navier-Stokes equation,
Neon:
Neopentane:
Net free area, in double-pipe heat exchangers,
Netherlands, guide to national mechanical design practice,
Networks, of heat exchangers, pinch analysis method for design of,
Neumann boundary conditions, finite difference method,
Nickel, thermal and mechanical properties
Nickel alloys,
Nickel steels,
Niessen, R,
Nitric oxide:
Nitriles:
Nitrobenzene:
Nitro derivatives:
Nitroethane:
Nitrogen:
Nitrogen dioxide:
Nitrogen peroxide:
Nitromethane:
m-Nitrotoluene:
Nitrous oxide
Noise:
Nonadecane:
Nonadecene:
Nonane:
Nonene:
Nonanol:
Nonaqueous fluids, critical heat flux in,
Non-circular microchannels:
Noncondensables:
Nondestructive testing, of heat exchangers
Nongray media, interaction phenomena with,
Nonmetallic materials:
Non-Newtonian flow:
Nonparticipating media, radiation interaction in,
Nonuniform heat flux, critical heat flux with,
Non-wetting surfaces, in condensation augmentation,
North, C,
No-tubes-in-window shells, calculation of heat transfer and pressure drop in,
Nozzles:
Nowell, D G,
Nucleate boiling:
Nuclear industry, fouling problems in,
Nucleation:
Nucleation sites:
Nuclei, formation in supersaturated vapor,
Number of transfer units (NTU):
Numerical methods:
Nusselt:
Nusselt-Graetz problem, in laminar heat transfer in ducts,
Nusselt number:
O
P
Q
R
S
T
U
V
W
X
Y
Z
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Costing of air coolers
DOI 10.1615/hedhme.a.000459
4.8.3 Costing of air coolers
A. A. Smith
An air cooler is a combination of pressure vessel, structure, mechanical equipment, and electric drive. As such, cost levels vary with such diverse parameters as the following:
- Fin tube type
- Tube length
- Header type
- Structure finish
- Materials of construction
- Noise limits
- Drive type
Approximate air cooler costs are most often quoted on the basis of dollars per square meter of outside bare tube surface. In order to detail variations in cost at 1988 levels, let us consider a typical unit:
| Size | 2,500 m2 bare surface |
| Core tube | Steel-14 BWG, 25.4-mm OD |
| Tube length | 9 m |
| Fin pitch | 2.3 mm |
| Fin material | Aluminum |
| Fans | 4-bladed 60 m/s tip speed |
| Drive | 22 KW max; V belt |
| Draft | Forced |
| Header | Plug |
| Pressure | 700 kPa |
| Structure finish | Galvanized |
| Walkways | Header and motor access |
| Ladders | To grade |
| Tube rows | 6 |
| Fin height | 16 mm |
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