Mixing Air Distribution
In this chapter we deal with air distribution in a room, where
L = room length B = room width Hr = room height
See Fig. 8.17.
If the room is to be ventilated by one single air jet, and the jet shall penetrate across the entire room length, the room length should not exceed1
A0 is the effective discharge area of the jet (m2)
B = room width (m)
Pollutant Room Heat activity air supply Type
Load height load level methods of process
Hr = room height (m)
= the decay coefficient of the jet L = room length (m)
Mmax = maximum velocity in jet cross-section (m/s) u0 = discharge velocity of the jet
The constant Kl is the decay coefficient used in the formula
«o 1 x 1
K± depends on the type of jet, and varies between 2 and 7. Some values are given in Table 8.10. See also Section 7.4, Air jets. If the room is longer, one has to take long-room considerations into account. See Section 220.127.116.11.
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