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 30, Problem 1RQ
The material often used to manufacture electric strip heater coils is ____.
Expert Solution & Answer
To determine
The material which is used for the manufacturing of electric strip heater coils.
Answer to Problem 1RQ
The material which is used for the manufacturing of electric strip heater coils is Nichrome.
Explanation of Solution
An electric heater is a heat producing device. In an electric heater there is a conversion of electric energy into the heat energy. Heat is being produced by the resistance of the material which is connected in an electric circuit. The materials being used in an electric heater should have high electric resistance and must be a good conductor of heat and electricity. It should also possess a high melting point. Since the heat is produced at an elevated temperature in the heating element. Hence it should have a property to withstand at such high temperature. Generally, a nichrome wire is used in an electric heater for the purpose of heating. Nichrome is an alloy of Nickel and Chromium. It also possesses good mechanical strength. Therefore, it is better option for using it in an electric heater.
Conclusion:
Nichrome is used to manufacture electric strip heater coils due to its good properties which are desired for the perfect heating coils.
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Procedure:1- Cartesian system, 2D3D,type of support2- Free body diagram3 - Find the support reactions4- If you find a negativenumber then flip the force5- Find the internal force3D∑Fx=0∑Fy=0∑Fz=0∑Mx=0∑My=0\Sigma Mz=02D\Sigma Fx=0\Sigma Fy=0\Sigma Mz=05- Use method of sectionand cut the elementwhere you want to find
Procedure:1- Cartesian system, 2D3D,type of support2- Free body diagram3 - Find the support reactions4- If you find a negativenumber then flip the force5- Find the internal force3D∑Fx=0∑Fy=0∑Fz=0∑Mx=0∑My=0\Sigma Mz=02D\Sigma Fx=0\Sigma Fy=0\Sigma Mz=05- Use method of sectionand cut the elementwhere you want to findthe internal force andkeep either side of the
Procedure:
1- Cartesian system, 2D3D,
type of support
2- Free body diagram
3 - Find the support reactions
4- If you find a negative
number then flip the force
5- Find the internal force
3D
∑Fx=0
∑Fy=0
∑Fz=0
∑Mx=0
∑My=0
ΣMz=0
2D
ΣFx=0
ΣFy=0
ΣMz=0
5- Use method of section
and cut the element
where you want to find
the internal force and
keep either side of the
Chapter 30 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 30 - The material often used to manufacture electric...Ch. 30 - Portable or small space heaters with glowing coils...Ch. 30 - Baseboard heaters transfer heat by______.Ch. 30 - A disadvantage of a central forced-air electric...Ch. 30 - Three common controls used in central electric...Ch. 30 - Prob. 6RQCh. 30 - Prob. 7RQCh. 30 - Prob. 8RQCh. 30 - True or False: A package sequencer can start or...Ch. 30 - Two types of wiring diagrams are the pictorial and...
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