A space is to be maintained at 75 F db and 40% relative humidity. The total heat gain to the space is 62,000 Btu/hr with a SHF of 0.8. The outdoor air requirement is 500 cfm. The outdoor air has a temperature of 90 F and 50% relative humidity. Assume that the supply air has a temperature of 50 F db. Determine the following: a. Quantity of supplied air b. Capacity of the cooling coil c. Rate of moisture removal from the dehumidification element

A space is to be maintained at 75 F db and 40% relative humidity. The total heat gain to the space is 62,000 Btu/hr with a SHF of 0.8. The outdoor air requirement is 500 cfm. The outdoor air has a temperature of 90 F and 50% relative humidity. Assume that the supply air has a temperature of 50 F db. Determine the following: a. Quantity of supplied air b. Capacity of the cooling coil c. Rate of moisture removal from the dehumidification element

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A space is to be maintained at 75 F db and 40% relative humidity. The total heat gain to the space is 62,000
Btu/hr with a SHF of 0.8. The outdoor air requirement is 500 cfm. The outdoor air has a temperature of 90
F and 50% relative humidity. Assume that the supply air has a temperature of 50 F db. Determine the
following:
a. Quantity of supplied air
b. Capacity of the cooling coil
c. Rate of moisture removal from the dehumidification element

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Using a psychrometric diagram, describe the heating and humidification process from the following data. Initially the air was at dry bulb temperature (DBT) 30 ° C and RH 35%. The air is heated to DBT 80 ° C. The heated air is then flowed through a humidifier to increase the RH to 25%. For this process, calculate: a. Change in absolute humidity of air from initial to final conditions = ... (kg water / kg air) b. The change in enthalpy of air from initial to final conditions = ... (KJ / Kg of air)
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