Page 320 - Chemical Process Equipment - Selection and Design

284 DRYERS AND COOLING TOWERS

95
LL
LL e
W
90
4
a
W
a
3 85
c-
a
W
b-
5 00
0
J
0
0
75
60 65 70 75 BO 60 65 70 75 00 60 65 70 75 80
AIR WET-BULB TEMPERATURE (OF) AIR WET - BULB TEMPERATURE (OF) AIR WET-BULB TEMPERATURE ('F 1
Figure 9.19. Typical cooling tower performance curves (Cheremisinoff and Cheremisinoff, 198f).

TABLE 9.20. Selected Data Required with Bids of Cooling Towers
A. Cooling Tower 3. Type and manufacturer
1. Number of cells 4. Full load speed, rpm
2. Cell dimensions, ft, in. 5. Frame size
3. Tower lenath. ft. in. 6. Full load current, amps
-..
4. Tower width, ft, in. 7. Locked rotor current amps
5. Tower height, ft, in. 8. Weight, Ib
6. Casing, material and dimensions
7. Structure, material and dimensions
8. Fill decks, material and dimensions H. Distribution System
9. Partitions and baffles, materials and 1. Number and size of inlet flanges
dimensions 2. Height of water inlet above curb, ft, in.
10. Drift eliminators, material and 3. Header material
dimensions 4. Lateral material
11. Fan stacks, material and dimensions 5. Nozzle, or downspout material
12. Fan deck, material and dimensions
13. Louvers, material and dimensions
14. Board feet of fill J. Design Performance
15. Board feet total tower 1. Pumping head from top of basin curb, ft
16. Height of fan stacks, ft, in. 2. Spray loss, max %
17. Post extension below curb, ft, in. 3. Evaporation loss, max %
18. Total shipping weight, Ib 4. Fill wetted surface, ft'
19. Total operating weight, Ib 5. Total wetted surface, ft'
6. Effective splash surface, ft'
8. Fans 7. Effective cooling volume, ft3 (from elimi-
1. Number of units nators to water level)
2. Type and manufacturer 8. Air volume per fan, cfm
3. Diameter, ft, in. 9. Static pressure, inches of water
4. Number of blades per fan 10. Output horsepower/motor/(turbine)
5. Blade material 11. Tower loading, gpm/ft2
6. Hub material
7. rpm
8. Tip speed, fpm K. Drawings and Performance Curves
9. Mechanical efficiency, % 1. Tower outline elevation
10. Static efficiency, % 2. Foundation outline
11. Weight, Ib 3. Fill rack details
4. Drift eliminator details
C. Motors 5. Tower sheeting arrangement
1. Number of units 6. A series of guaranteed performance curves within limits of CTI
2. Size, HP Test Procedure ATP-105, latest revision

(Excerpted from Cheremisinoff and Cheremisinoff, 1981).