MNL-093558
September 30, 2008
Page 18
BAUER
COMPRESSORS
In determining the necessary type of ventilation the following factors should also be considered:
•
Ambient temperature of the set-up room
•Size of the intake and exhaust openings
•
Length of a possible ventilation ducts
•Additional heat sources in the set-up room
•
Back pressure of the ventilation ducts
4.2.2.2.4
Cooling Air Flow Requirements
The minimum amount of cooling air required may be approximated by the following formulas.
Cooling Air Flow (cfm) = 132 x Drive Power (hp)
A table has been included in the appendix for more precise requirements.
4.2.2.2.5
Natural Ventilation
Natural ventilation should only be used up to a maximum drive power of 20 hp. To determine the size
of the required intake and exhaust openings, refer to the following table: .
Figure 4-3
Determining the Method of Ventilation
Drive hp
Intake and Exhaust Openings Dependent on Room Volume (V) and Height (h)
V = 1750 ft³ h = 6.5 ft
V = 3500 ft³ h = 10 ft
V = 7000 ft³ h = 13 ft
Intake (ft²)
Exhaust (ft²)
Intake (ft²)
Exhaust (ft²)
Intake (ft²)
Exhaust (ft²)
3
1.3
1.1
…
…
…
…
5
3.2
2.7
1.3
1.1
…
…
7.5
4.5
3.8
2.6
2.2
1.3
1.1
10
9.7
8.1
6.5
5.4
2.6
2.2
15
14.5
12.4
9.7
8.1
5.8
4.8
20
20.6
17.2
15.6
12.9
9.7
8.1
7000 ft³
(200 m³)
1750 ft³
(50 m³)
3500 ft³
(100 m³)
3 hp
2.2 kW
20 hp
15 kW
30 hp
23 kW
50 hp
37 kW
150 hp
113 kW
2625 ft ³
10 hp
Convection
Ventilation
Forced Ventilation
with Room Fan
Forced Ventilation
with Ducts