Bronkhorst CEM W-300B - Manual (Page 13)

BRONKHORST HIGH-TECH B.V.
By 50% r.h., the (mole) ratio between gas and water:
100 .% . ⋅ =
sat
e
e
h r 6 . 236
100
3 . 473 50
=
⋅
= e [mbar]
the moleRatio:
305 . 0
) 6 . 236 25 . 1013 (
6 . 236
=
−
= X
so in a gas flow of 2 ln/min, the saturated water flow (50% r.h.) is:
61 . 0 2 305 . 0 = ⋅ = Φ ⋅ = Φ
gas water
X
[ln/min]
and in [g/h]
41 . 29
] [ 4 . 22
] [ 60 ] [ 18 ] [ 61 . 0
ln
min
min
ln
=
⋅ ⋅
mol
h mol
g
[g/h]
At 50% r.h., the waterflow is 29.41 g/h.
(*) Assumptions: Consider water vapour as an ideal gas, 1 mole of ideal gas at normal
conditions = 22.4 l, 1 mole of water is 18 g and 1 hour is 60 min.
1 atm. = 1013.25 mbar.
9.17.082 page 13