A classroom that normally contains 60 people is to be air-conditioned using window air- conditioning units of 4-kW cooling capacity. A person at rest may be assumed to dissipate heat at a rate of 350 kJ/h. There are 12 lightbulbs in the room, each with a rating of 110 W. The rate of heat transfer to the classroom through the walls and the windows is estimated to be 18,000 kJ/h. If the room air is to be maintained at a constant temperature of 19°C, determine the number of window air-conditioning units required.

A classroom that normally contains 60 people is to be air-conditioned using window air- conditioning units of 4-kW cooling capacity. A person at rest may be assumed to dissipate heat at a rate of 350 kJ/h. There are 12 lightbulbs in the room, each with a rating of 110 W. The rate of heat transfer to the classroom through the walls and the windows is estimated to be 18,000 kJ/h. If the room air is to be maintained at a constant temperature of 19°C, determine the number of window air-conditioning units required.

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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