MIL-HDBK-1011/2
APPENDIX C (continued)
Section 1:
AIR MOVEMENT BY NATURAL VENTILATION
1.1
Window Sizing Procedure.
1.1.1
Required Total Window Areas. This procedure is used to determine
required total window inlet and outlet areas based on a specified interior air
velocity. It is valid for rooms with only one interior partition, or open
rooms in one to six story buildings without large interior gains. This
procedure is based on work done at the Florida Solar Energy Center and
documented in Chandra, et al. (1983), Outdoor Testing of Small Scale Naturally
Ventilated Models. Figure C-1 illustrates window sizing measurements.
V = ))))) fpm
(1)
Required air velocity rate, V
from Climate Analysis.
(2)
Cross-sectional area of the room, CS
H = )))) ft
Height of room, H
W = )))) ft
Width of room across flow, W
CS = ))) ft.2-
CS = H x W
CFM = )))) cfm
(3)
Required airflow rate, CFM.
CFM = V x CS
Building location: ))))))))))))))))))))))))))))))))))))) (city)
(4)
Weather Station location: ))))))))))))))))))))))))))))))
Using Climate Analysis, examine
worst two naturally ventilated months separately.
Design months: )))) ))))
WD = )))) = )))))
(5)
Prevailing wind direction for month, WD.
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