Question 5 - Section B: The mean air temperature outside a theatre hall is 32 °C. Indoor air is maintained at 18 °C. The variable air volume (VAV) ventilation system that ventilates this hall has a cooling load of 28.6 kW. There are 86 people in the theatre and each person produces carbon dioxide (CO2) at a rate of 0.0402 m³ per hour. The theatre hall is 26 m long, 14 m wide and 3.2 m high. The allowable maximum CO2 concentration in the hall is 1150 ppm. Outdoor air CO2 concentration is 520 ppm. For the air, take density, p as 1.184 kg/m³, and the specific heat capacity of air at constant pressure, Cp is 1005 J/kg.K. Determine: (iv) the minimum outdoor air supply volume flow rate required to maintain the indoor CO2 level at or below the specified level. (v) the refresh rate (in number of air changes per hour) required. (vi) the mass flow rate of air from the VAV system to maintain the required indoor air temperature at the specified cooling load.

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
icon
Related questions
Question
I need help with this before tomorrow’s exam if I can get all needed calculations please
Question 5 - Section B:
The mean air temperature outside a theatre hall is 32 °C. Indoor air is maintained at 18 °C. The
variable air volume (VAV) ventilation system that ventilates this hall has a cooling load of 28.6 kW.
There are 86 people in the theatre and each person produces carbon dioxide (CO2) at a rate of
0.0402 m³ per hour. The theatre hall is 26 m long, 14 m wide and 3.2 m high. The allowable
maximum CO2 concentration in the hall is 1150 ppm. Outdoor air CO2 concentration is 520 ppm.
For the air, take density, p as 1.184 kg/m³, and the specific heat capacity of air at constant
pressure, Cp is 1005 J/kg.K.
Determine:
(iv) the minimum outdoor air supply volume flow rate required to maintain the indoor CO2 level at
or below the specified level.
(v) the refresh rate (in number of air changes per hour) required.
(vi) the mass flow rate of air from the VAV system to maintain the required indoor air temperature
at the specified cooling load.
Transcribed Image Text:Question 5 - Section B: The mean air temperature outside a theatre hall is 32 °C. Indoor air is maintained at 18 °C. The variable air volume (VAV) ventilation system that ventilates this hall has a cooling load of 28.6 kW. There are 86 people in the theatre and each person produces carbon dioxide (CO2) at a rate of 0.0402 m³ per hour. The theatre hall is 26 m long, 14 m wide and 3.2 m high. The allowable maximum CO2 concentration in the hall is 1150 ppm. Outdoor air CO2 concentration is 520 ppm. For the air, take density, p as 1.184 kg/m³, and the specific heat capacity of air at constant pressure, Cp is 1005 J/kg.K. Determine: (iv) the minimum outdoor air supply volume flow rate required to maintain the indoor CO2 level at or below the specified level. (v) the refresh rate (in number of air changes per hour) required. (vi) the mass flow rate of air from the VAV system to maintain the required indoor air temperature at the specified cooling load.
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY