MIL-HDBK-1011/2
APPENDIX C (continued)
Ao = ))))) ft2 = ))))) ft2
(16)
Calculate open outlet area,Ao.
Ao = A x Ai / [(Ai2 - A2)]
RF = ))))) = )))))
(17)
Increase open areas calculated
above for resistance due to insect screens,
partially open windows, partitions, etc.
Find Resistance Factor (RF) from Table C-5.
(18)
Calculate TOTAL (not open) inlet and outlet window areas,
TAi, TAo.
TAi = Ai/RF
TAi = )))) ft2
= Total Req'd Inlet Area for worst month.
TAi = )))) ft2
= Total Req'd Inlet Area for 2nd worst
TAo = Ao / RFT
Ao = )))) ft2
= Total Req'd Outlet Area for worst month.
TAo = )))) ft2
= Total Req'd Outlet Area for 2nd worst month.
SUMMARY:
Required velocity, V = ))))))))))))))) Weather Station = ))))))))))))))))))))
Worst month = )))))))))))))))))))))))) 2nd worst month = ))))))))))))))))))))
Windspeed, WS = )))))))))))))))))))))) Windspeed, WS = ))))))))))))))))))))))
Wind direction, WD = ))))))))))))))))) Wind direction, WD = )))))))))))))))))
Open inlet req'd, TAi = )))))))))))) Open inlet req'd, TAi = ))))))))))))
Open outlet req'd, TAo = ))))))))))) Open outlet req'd, TAo = )))))))))))
1.1.2
Check for Required Airspeed. This procedure is used to check
adequacy of the proposed design. When the proposed schematic design is
detailed enough to include site plan, building location, room dimensions,
window details, and shading system, the following procedure can be used to
determine whether the proposed design will provide the required interior air
speed.
V = )))))) fpm
(1)
Required air velocity rate, V
from Climate Analysis.
H = ))))))) ft
(2)
Cross-sectional area of the room, CS
Height of room, H
W = ))))))) ft
Width of room across flow, W
CS = )))))) ft2
CS = HW
(3)
Required airflow rate, CFM.
CFM = )))))) cfm
CFM = VCS
Building location = ))))))))))))))))))))))))))))))))))(city)
(4)
Weather Station location = )))))))))))))))))))))))))))))))
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