EBK MINDTAP FOR HERMAN'S UNDERSTANDING
4th Edition
ISBN: 9781337798761
Author: Herman
Publisher: VST
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Question
Chapter 31, Problem 1RQ
To determine
Identify the number of slip rings on a rotor shaft of wound rotor motor.
Expert Solution & Answer
Explanation of Solution
One of the three major types of the three-phase motor is the wound rotor motor. The wound rotor motor is the first AC motor with speed control.
The wound rotor motors are also known as slip ring motors and have three slip rings on the rotor shaft.
Hence, there are three slip rings on a rotor shaft of a wound rotor motor.
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Example 8: 900 Kg dry solid per hour is
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from 0.4 to 0.04 Kg H20/Kg wet solid
moisture content. The wet solid enters the
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*=0.0088
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Take the specific heat of the solid
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2.8
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العنوان
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14.23. A double-effect forward-feed
evaporator is required to give a product
consisting of 30 per cent crystals and a
mother liquor containing 40 per cent by
mass of dissolved solids. Heat transfer
coefficients are 2.8 and 1.7 kW/m² K in the
first and second effects respectively. Dry
saturated steam is supplied at 375 kN/m²
and the condenser operates at 13.5 kN/
m².
(a) What area of heating surface is
required in each effect assuming the
effects are identical, if the feed rate is 0.6
kg/s of liquor, containing 20 per cent by
mass of dissolved solids, and the feed
temperature is 313 K?
(b) What is the pressure above the boiling
liquid in the first effect?
The specific heat capacity may be
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hydrostatic head may be neglected.
Chapter 31 Solutions
EBK MINDTAP FOR HERMAN'S UNDERSTANDING
Ch. 31 - Prob. 1RQCh. 31 - Prob. 2RQCh. 31 - A wound rotor induction motor has a stator that...Ch. 31 - Name three factors that determine the amount of...Ch. 31 - Prob. 5RQCh. 31 - Explain why controlling the rotor current also...Ch. 31 - What is the function of a micro limit switch when...Ch. 31 - Prob. 8RQCh. 31 - What is rotor slip?
Ch. 31 - Prob. 10RQ
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