Air at 14.7 psia, 35oF, and 50 percent relative humidity is first heated to 65oF in a

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Air at 14.7 psia, 35oF, and 50 percent relative humidity is first heated to 65oF in a heating section and then humidified by introducing water vapor. The air leaves the humidifying section at 75oF and 55 percent relative humidity. Determine
(a) The amount of steam added to the air, in lbm H2O/lbm dry air.
(b) The amount of heat transfer to the air in the heating section, in Btu/lbm dry air.
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Thermodynamics An Engineering Approach

ISBN: 978-0073398174

8th edition

Authors: Yunus A. Cengel, Michael A. Boles

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