Elementary Principles 336 - 8.79 (cont'd) c. QBA = H = H B...

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8-57 8.79 (cont’d) c. QH H H H H BA B A DC D C ==−≅ Δ Δ ±± ( / ( / 20 23 - 6.4) Btu / lb dry air 12.2 ft lb dry air =1.1 Btu/ft - 20) Btu / lb dry air 12.2 ft =0.25 Btu/ft m 3 m 3 m 3 m 3 d. A B C D 20 58.5 75 70 70% 52% 35% 8.80 Basis : 1 kg D.A. a. a a 1 kg D.A. h (kg H O/kg D.A.) 2 T db = 40°C, T ab = 18°C m w kg H O 2 1 kg D.A. h (kg H O/kg D.A.) 2 20°C, 12 Inlet air: T T h a db wb 2 C C kg H O kg D.A. ⇒= 40 18 00039 1 . Outlet air: T T h a db wb 2 C C adiabatic humidification kg H O kg D.A.
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