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A high-school classroom is occupied by 20 students who each produce 180 Btu/h (53 W) of...

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Mechanical Engineering

A high-school classroom is occupied by 20 students who eachproduce 180 Btu/h (53 W) of sensible heat and 0.20 lb/h (0.09 kg/h)of moisture. The class is to be maintained at 68°F (20°C) and 55%relative humidity. Conditioned air is supplied at 60°F (15°C) tomeet the sensible and latent loads. What is the SHR? To meet theloads, what must the humidity ratio and mass flow rate of thesupply air be? The office is located at 5000 ft (1500 m)altitude.

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