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Moist air at a pressure of 100 kPa is compressed to 500 kPa and then cooled to 35°C in an aftercooler. The air at the entry to the aftercooler is unsaturated and becomes just saturated at the exit of the aftercooler. The saturation pressure of water at 35°C is 5.628 kPa. The partial pressure of water vapour (in kPa) in the moist air entering the compressor is closest to
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- 0.57
- 1.13
- 2.26
- 4.52
Correct Option: B
Assuming that compression is isentropic in air compressors, the process can be described on the T - s diagram. The process in the intercooler is constant pressure
p2 = p3
But p2 = 5p1
| p1 = | = | 5 | 5 |
| p1 = | = 1.13kPa | 5 |
