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Ambient air is at a pressure of 100 kPa, dry bulb temperature of 30° C and 60% relative humidity, The saturation pressure of water at 30° C is 4.24 kPa. The specific humidity of air (in g/kg of dry air) is (correct to two decimal places).
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- 26.24 gms/kg of dry air
- 16.24 gms/kg of dry air
- 18.24 gms/kg of dry air
- 19.24 gms/kg of dry air
Correct Option: B
Patm = 100 kPa
DBT = t = 30°C → PVS = 4.24 k Pa
φ = 60° = 0.6
| φ | ⇒ 0.6 = | ||
| PVS | 4.24 |
PV = 2.544 kPa
| w = 0.622 × | ||
| Patm - PV |
| w = 0.622 × | ||
| 100 - 2.544 |
w = 16.24 gms/kg of dry air
