Lab Manual for Tomczyk/Silberstein/ Whitman/Johnson’s Refrigeration and Air Conditioning Technology, 8th
8th Edition
ISBN: 9781305578708
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 22, Problem 2RQ
The three materials of which condensers are normally made are _____, and ____.
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Fig. (2)
Q3-A (8 Marks): An automobile is modeled as a single-degree-of-freedom system vibrating in
the vertical direction. It is driven along a road whose elevation varies sinusoidally. The
distance from peak to trough is 0.2 m and the distance along the road between the peaks is 35
m. If the natural frequency of the automobile is 2 Hz and the damping ratio of the shock
absorbers is 0.15, determine the amplitude of vibration of the automobile at a speed of 60
km/hour
6.18
2.
Q4(15 Marks): The motor-pump system shown in Fig. 4. is modeled as a rigid bar of mass
m=50 kg and mass moment of inertia Jo=100 kg-m. The foundation of the system can be
replaced by two springs of stiffness k=500 N/m and k₂-200 N/m and L=1 m. Determine
the natural frequencies of the system.
Motor,
Fig. (4)
1
6(1)
Pump
C.G.
x(1)
x₁(1)
Base
(a)
Foundation
(b)
C.G. m, Jo
x2(1)
Q5(15 marks): Two equal pendulum free to rotate counterclockwise about the x-x axis are couple
together by a rubber hose of torsional stiffness K lb.in/rad.as shown in Fig.5. determine the natural
frequencies and mode shape for the normal modes of vibration. If L=19.3 in., W=3.86 lb, and
k=20 lb.in/rad. Note: J=mL2
X
(1)
m
2
mc²
2
X
Chapter 22 Solutions
Lab Manual for Tomczyk/Silberstein/ Whitman/Johnson’s Refrigeration and Air Conditioning Technology, 8th
Ch. 22 - Why do some condensers have to be cleaned with...Ch. 22 - The three materials of which condensers are...Ch. 22 - Who should be consulted when condenser cleaning is...Ch. 22 - When is the most heat removed from the refrigerant...Ch. 22 - After heat is absorbed into a condenser medium in...Ch. 22 - A water-cooling tower capacity is governed by what...Ch. 22 - When a standard-efficiency air-cooled condenser is...Ch. 22 - Four methods for controlling head pressure in an...Ch. 22 - The prevailing winds can affect which of the...Ch. 22 - True or False: Air-cooled condensers are much more...
Ch. 22 - The type of condenser that has the lowest...Ch. 22 - Compare the standard conditions of high-efficiency...Ch. 22 - Name two ways in which the heat from an air-cooled...Ch. 22 - Briefly describe what is meant by floating head...Ch. 22 - Explain how to flush impurities from a...Ch. 22 - Explain the basic operation of a combination ORI...Ch. 22 - Name two problems a refrigeration system may have...Ch. 22 - Briefly explain what is meant by condenser...
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