Heating Ventilating and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9780471470151
Author: Faye C. McQuiston, Jeffrey D. Spitler, Jerald D. Parker
Publisher: Wiley, John & Sons, Incorporated
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Chapter 4, Problem 4.7P
In an occupied space the mean air velocity is found to be 40 fpm (0.2 m/s), the dry bulb temperature is 74 F (23 C) and the globe temperature is measured to be 78 F (26 C). Calculate the operative temperature in both F and C.
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A bank of 120-employees is maintained at 24°C db and 50% RH. The heat gain due to heat transfer through walls, roof, ..etc is 10 kW. The outside air temperature is 35°C and its relative humidity is 60%.
Calculate the followings:
(a) Ventilation air required.
(b) Sensible and latent heat gains due to occupants. (CLF = 0.86)
(c) Volumetric flow rate of supply air if the supply temperature is 18°C.
Exercise 17.6
Air at 20°C and 60% relative humidity is heated to 90°C and then enters a
continuous dryer in an adiabatic operation. The air exits at 40 °C. Calculate: a)
the inlet volumetric flow rate of air required to remove 20 kg of water/h from
the product and b) the required energy to heat the air.
JO 100 46 ll a
0 701 2:53
Final Exam
X A
mlms.hu.edu.jo
Marked out of 2.00
P Flag question
Cold air enters the mixing
chamber at 85°C and 105
kPa at a rate of 0.55 m /s,
while warm air enters at
487°C and 105 kPa and the
exit temperature of air
leaving the chamber is 384.8
K. What is the ratio of the
mass flow rates of the cold
to hot air streams (m /m,)?
Select one:
A. 14.00
B. 15.19
C. 16.35
D. 17.52
E. 12.74
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Chapter 4 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
Ch. 4 - Using Fig. 4-1, draw a conclusion about the...Ch. 4 - Using Fig. 4-1, draw a conclusion about the...Ch. 4 - Select comfortable summer design conditions (dry...Ch. 4 - It is desired to use a space as a large classroom...Ch. 4 - An indoor tennis facility finds that it has...Ch. 4 - Work Problem 4-5 for an average air speed at court...Ch. 4 - In an occupied space the mean air velocity is...Ch. 4 - An occupied space is being held at 76 F (24 C) and...Ch. 4 - What do you think is the best thermostat setting...Ch. 4 - With the air conditioning running and the...
Ch. 4 - Discuss how an emergency government mandate to set...Ch. 4 - In the heating seasons the heat loss from a...Ch. 4 - Air motion can be good or bad, depending on the...Ch. 4 - To save energy in large, chilled water systems,...Ch. 4 - Overhead fans (Casablanca fans) are often reversed...Ch. 4 - A school classroom is designed for 30 people. (a)...Ch. 4 - Carbon dioxide is being generated in an occupied...Ch. 4 - Each person in a room is assumed to be producing...Ch. 4 - An air-handling system must handle 2000 cfm with a...Ch. 4 - Prob. 4.20PCh. 4 - How many filter modules will be required using the...Ch. 4 - Work Problem 4-21 assuming that the filter is a...Ch. 4 - The M-200, 0.60.60.2 filters of Table 4-3 are to...Ch. 4 - Investigate the feasibility of using 100 percent...Ch. 4 - Work Problem 4-24 but replace the 100 percent...Ch. 4 - Using M-15 filter media and the requirement of 60...Ch. 4 - A filter system is available that will filter out...Ch. 4 - A maximum of 10 smokers are anticipated in a smong...Ch. 4 - Solve Ex. 4-4 assuming that the filter is in...Ch. 4 - Solve Problem 4-28 assuming that the filter is in...Ch. 4 - Fora 3000-ft3 combination and exercise operation,...Ch. 4 - A classroom with a capacity of 225 people is...
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