Two 400W fans are switched on in a perfectly-insulated, closed room at atmospheric pressure and a temperature of 18°C. If the fans operate continuously and the room is 5m x 6m with 3.5m high ceiling. Assuming that the specific gas constant and specific heat capacity of air at a constant volume are 287 J/kg.K and 717 J/kg.K respectively: (a) Calculate the temperature of the air in the room after 2 hours, stating all of the assumptions made. (b) What would be the temperature of the room if there was a heat loss through the walls of 750 W throughout the two hours?
Two 400W fans are switched on in a perfectly-insulated, closed room at atmospheric pressure and a temperature of 18°C. If the fans operate continuously and the room is 5m x 6m with 3.5m high ceiling. Assuming that the specific gas constant and specific heat capacity of air at a constant volume are 287 J/kg.K and 717 J/kg.K respectively: (a) Calculate the temperature of the air in the room after 2 hours, stating all of the assumptions made. (b) What would be the temperature of the room if there was a heat loss through the walls of 750 W throughout the two hours?
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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Transcribed Image Text:Q2 Two 400W fans are switched on in a perfectly-insulated, closed room at atmospheric
pressure and a temperature of 18°C. If the fans operate continuously and the room is
5m x 6m with 3.5m high ceiling. Assuming that the specific gas constant and specific
heat capacity of air at a constant volume are 287 J/kg.K and 717 J/kg.K respectively:
(a) Calculate the temperature of the air in the room after 2 hours, stating all of the
assumptions made.
(b) What would be the temperature of the room if there was a heat loss through the
walls of 750 W throughout the two hours?
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