VENTILATION DESIGN
1
2
3
7
8
4
7
8
9
10
11
12
11
12
13
14
15
16
17
18
19
20
Monitor length l=
Monitor Width w= S/L
Total monitor area
S= Q/[g*h*(To-Ti)/(To+273)]^0.5
g
SH : Specific heat capacity of air =
The ventilation rate
Q=H/(SH*D*T)= 1260901m3/h
=> Q/V=13.14 time
Stack height
SH : Specific heat capacity of air =
D : Density of air =
Delta T = Temperature difference T= To-Ti
Temperature inside Ti=
Temperature outside To=
H
=Hs + Hl + Hi
Hl = Heat gain from lighting
Hi = Heat gain from internal equipment,people,
etc.
Hs = Solar Heat Gain
Hs
=AxIxaxe
A = Roof Area=
97.9
80.3
I = Actual Solar Radiation stroof surface
(= 0.945 = 0.945 kW/m2 for Thailand)
a = Solar radiation factor of
(= 0.40 for Steel sheeting)
e = Proportion of "a" transmitted into the
building. This factor is dependent on
the "U" value of insulation
= 0.093 for a building with insulation
= 1.000 for a building without
insulation
450.0
0.47
209.94
m
m
m2
9.8 m/s2
1.005 kJ/(kg.K)
350.3
m3/s
12.2
m
1.005 kJ/(kg.K)
1.206 kg/m3
7.0
oC
28.0
oC
35.0
oC
2971.6 kW
0 kW
0
kW
2,972
kW
7861.37
m2
0.945 kW/m2
0.4
1