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QUESTION 15 – COOLING TOWERS AND EVAPORATIVE CONDENSERS A cooling tower is a device that cools...

QUESTION 15 – COOLING TOWERS AND EVAPORATIVE CONDENSERS A cooling tower is a device that cools a spray of water by passing it through a stream of air. If 15 m3/s of air is at 35 °C dry-bulb and 24 °C wet-bulb temperature and an atmospheric pressure of 101 kPa enters the tower and the air leaves saturated at 31 °C, (a) to what temperature can this airstream cool a spray of water entering at 38 °C with a flow rate of 20 kg/s, and (b) how many kilograms per second of make-up water must be added to compensate for the water that is evaporated?

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