Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 27, Problem 6RQ
List two causes that may lead to auger wobble.
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Example-1:
l
D
A uniform rotor of length 0.6 m and diameter 0.4 m is made of steel (density 7810 kg/m³)
is supported by identical short bearings of stiffness 1 MN/m in the horizontal and vertical
directions. If the distance between the bearings is 0.7 m, determine the natural frequencies
and plot whirl speed map.
Solution:
B
find the laplace transform for the
flowing function
2(1-e)
Ans. F(s)=-
S
12)
k
0
Ans. F(s)=
k
s(1+e)
0 a
2a 3a 4a
13)
2+
Ans. F(s)=
1
s(1+e")
3
14) f(t)=1, 0
Find the solution of the following Differential Equations
Using Laplace Transforms
1) 4y+2y=0.
y(0)=2.
y'(0)=0.
2) y+w²y=0,
(0)=A,
y'(0)=B.
3) +2y-8y 0.
y(0)=1.
y'(0)-8.
4)-2-3y=0,
y(0)=1.
y'(0)=7.
5) y-ky'=0,
y(0)=2,
y'(0)=k.
6) y+ky'-2k²y=0,
y(0)=2,
y'(0) = 2k.
7) '+4y=0,
y(0)=2.8
8) y+y=17 sin(21),
y(0)=-1.
9) y-y-6y=0,
y(0)=6,
y'(0)=13.
10) y=0.
y(0)=4,
y' (0)=0.
11) -4y+4y-0,
y(0)=2.1.
y'(0)=3.9
12) y+2y'+2y=0,
y(0)=1,
y'(0)=-3.
13) +7y+12y=21e".
y(0)=3.5.
y'(0)=-10.
14) "+9y=10e".
y(0)=0,
y'(0)=0.
15) +3y+2.25y=91' +64.
y(0)=1.
y'(0) = 31.5
16)
-6y+5y-29 cos(2t).
y(0)=3.2,
y'(0)=6.2
17) y+2y+2y=0,
y(0)=0.
y'(0)=1.
18) y+2y+17y=0,
y(0)=0.
y'(0)=12.
19) y"-4y+5y=0,
y(0)=1,
y'(0)=2.
20) 9y-6y+y=0,
(0)-3,
y'(0)=1.
21) -2y+10y=0,
y(0)=3,
y'(0)=3.
22) 4y-4y+37y=0,
y(0)=3.
y'(0)=1.5
23) 4y-8y+5y=0,
y(0)=0,
y'(0)=1.
24)
++1.25y-0,
y(0)=1,
y'(0)=-0.5
25) y 2 cos(r).
y(0)=2.
y'(0) = 0.
26)
-4y+3y-0,
y(0)=3,
y(0) 7.
27) y+2y+y=e
y(0)=0.
y'(0)=0.
28) y+2y-3y=10sinh(27),
y(0)=0.
y'(0)=4.
29)…
Chapter 27 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 27 - Which type of ice maker has a continuous harvest...Ch. 27 - Which type of ice is made using a gear motor and...Ch. 27 - What would be the symptoms of a defective float on...Ch. 27 - What are the two functions of the dual float...Ch. 27 - Which part of an ice flake machine is most prone...Ch. 27 - List two causes that may lead to auger wobble.Ch. 27 - What is the function of a flush cycle for an ice...Ch. 27 - Name and explain three types of ice bin controls...Ch. 27 - Ice production in an ice flake machine depends...Ch. 27 - Explain the function of weep holes on the...
Ch. 27 - True or False: Stainless steel is often used for...Ch. 27 - Explain what is meant by ice bridging in a...Ch. 27 - Explain the function of the centrifugal pump in...Ch. 27 - What is the function of the ice thickness probe in...Ch. 27 - Prob. 15RQCh. 27 - What is the most common type of defrost during an...Ch. 27 - Explain how liquid floodback to the compressor may...Ch. 27 - Prob. 18RQCh. 27 - Prob. 19RQCh. 27 - Prob. 20RQCh. 27 - Prob. 21RQCh. 27 - One of the quickest and most thorough ways of...Ch. 27 - Prob. 23RQCh. 27 - Prob. 24RQCh. 27 - True or False: Entering-air temperature and water...Ch. 27 - A measurement that represents the thermal cooling...Ch. 27 - A buildup of minerals that forms a flaky coating...Ch. 27 - A method for killing bacteria, viruses, and...Ch. 27 - Prob. 29RQCh. 27 - Prob. 30RQCh. 27 - True or False: A common type of water filtration...Ch. 27 - Prob. 32RQCh. 27 - Prob. 33RQ
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