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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Textbook Question
Chapter 4, Problem 4.1P
Using Fig. 4-1, draw a conclusion about the comfort of a mixed group of men and women in typical seasonal clothing, with sedentary activity for the following cases:
a. Summer, operative temperature 77 F, wb 64 F
b. Winter, operative temperature. 77 F, wb 64 F
c. Summer, operative temperature 75 F, dp 50 F
d. Winter, operative temperature 73 F, dp 34 F
(a)
Expert Solution
To determine
The comfort of mixed group of men and women in typical seasonal clothing.
Answer to Problem 4.1P
According to given condition, the group will feel comfortable.
Explanation of Solution
Given:
The operating temperature of summer is
The wet bulb temperature of summer is
Calculation:
From fig4-1,
According to ASHRAE standard, the acceptable range of operating temperature is
(b)
Expert Solution
To determine
The comfort of mixed group of men and women in typical seasonal clothing.
Answer to Problem 4.1P
According to given condition, the group will not feel comfortable.
Explanation of Solution
Given:
The operative temperature of winter is
The wet bulb temperature of winter is
Calculation:
From fig4-1,
According to ASHRAE standard, the acceptable range of operating temperature is
(c)
Expert Solution
To determine
The comfort of mixed group of men and women in typical seasonal clothing.
Answer to Problem 4.1P
According to given condition, the group will feel comfortable
Explanation of Solution
Given:
The operative temperature of summer is
The dew temperature of summer is
Calculation:
From fig4-1,
According to ASHRAE standard, the acceptable range of operating temperature is
(d)
Expert Solution
To determine
The comfort of mixed group of men and women in typical seasonal clothing.
Answer to Problem 4.1P
According to given condition, the group will feel uncomfortable.
Explanation of Solution
Given:
The operative temperature of winter is
The dew temperature of winter is
Calculation:
From fig4-1,
According to ASHRAE standard, the acceptable range of operating temperature is
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Chapter 4 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
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