GATE ME 2014 Set 4 — Question 27
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Thermodynamics → Refrigeration & Air Conditioning → Humidification & Dehumidification
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Question
Moist air at and relative humidity is entering a psychrometric device and leaving at and relative humidity. The name of the device is
Correct answer
(B) Dehumidifier
Solution
The process involves cooling moist air from to while maintaining relative humidity. On a psychrometric chart, this path follows the saturation curve downwards. As the temperature of saturated air decreases, its moisture-holding capacity (specific humidity) also decreases, leading to the condensation of water vapor. Since moisture is removed from the air, the process is dehumidification, and the device is a dehumidifier.
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