Heating Ventilating and Air Conditioning: Analysis and Design
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
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
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
Check Mark
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 77F .

The wet bulb temperature of summer is 64F .

Calculation:

From fig4-1,

According to ASHRAE standard, the acceptable range of operating temperature is 77F and wet bulb temperature is 64F on summer the mixed group of men and women will feel comfortable during this season because at this operating temperature the relative humidity reaches to 60% .

(b)

Expert Solution
Check Mark
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 77F .

The wet bulb temperature of winter is 64F .

Calculation:

From fig4-1,

According to ASHRAE standard, the acceptable range of operating temperature is 77F and wet bulb temperature is 64F on winter the mixed group of men and women will feel comfortable during this season because at this operating temperature the relative humidity reaches to 60% due to this the temperature is maintained in this season.

(c)

Expert Solution
Check Mark
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 75F .

The dew temperature of summer is 50F .

Calculation:

From fig4-1,

According to ASHRAE standard, the acceptable range of operating temperature is 75F and wet bulb temperature is 50F on summer the mixed group of men and women will feel comfortable during this season because at this operating temperature the relative humidity reaches to 40% so that the temperature is maintained in this summer season.

(d)

Expert Solution
Check Mark
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 73F .

The dew temperature of winter is 34F .

Calculation:

From fig4-1,

According to ASHRAE standard, the acceptable range of operating temperature is 73F and wet bulb temperature is 34F on winter the mixed group of men and women will feel uncomfortable during this season because at this operating temperature the relative humidity decrease to 30% due to this the temperature produce more heat in this winter season.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
For the flows in Examples 11.1 and 11.2, calculate the magnitudes of the Δ V2 / 2 terms omitted in B.E., and compare these with the magnitude of the ℱ terms.
Calculate ℛP.M. in Example 11.2.
Question 22: The superheated steam powers a steam turbine for the production of electrical power. The steam expands in the turbine and at an intermediate expansion pressure (0.1 MPa) a fraction is extracted for a regeneration process in a surface regenerator. The turbine has an efficiency of 90%. It is requested: Define the Power Plant Schematic Analyze the steam power system considering the steam generator system in the attached figure Determine the electrical power generated and the thermal efficiency of the plant Perform an analysis on the power generated and thermal efficiency considering a variation in the steam fractions removed for regeneration ##Data: The steam generator uses biomass from coconut shells to produce 4.5 tons/h of superheated steam; The feedwater returns to the condenser at a temperature of 45°C (point A); Monitoring of the operating conditions in the steam generator indicates that the products of combustion leave the system (point B) at a temperature of 500°C;…

Chapter 4 Solutions

Heating Ventilating and Air Conditioning: Analysis and Design

Additional Engineering Textbook Solutions

Find more solutions based on key concepts
Knowledge Booster
Background pattern image
Mechanical Engineering
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
General Industrial Safety; Author: Jim Pytel;https://www.youtube.com/watch?v=RXtF_vQRebM;License: Standard youtube license