Hot humid day 90°F and 90% RH. Condition the air to 70°F at about 50% RH. Chill the air to condense out enough moisture to dehumidify it: goal is air with absolute humidity not exceeding 0.008 lbs of moisture per pound of air. Show processes.

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Example 10: Condition and dehumidify air by chilling and condensing some moisture: Process table
SysML4Mathematica: Example 10: Condition and dehumidify air by chilling and condensing some moisture: Process table
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CED Engineering course PDF: 'Air Conditioning Psychrometrics (A.Bhatia)'
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About copyright in the CED Engineering course PDF for: 'Air Conditioning Psychrometrics' © A. Bhatia
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Consider a hot humid day 90°F and 90% RH. We want to condition the air to 70°F at about 50% RH. We do this by chilling the air far enough to condense out enough moisture to dehumidify it: the goal is to have air with absolute humidity not exceeding 0.008 lbs of moisture per pound of air (~50 to 55 grains per pound of dry air). Show the processes on the psychrometric chart.

Answer

Water added = 0.188 lb-m

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