KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of rubberized sheath. Contact resistance between sheath and wire. Convection coefficient and ambient air temperature. Maximum allowable sheath temperature. FIND: Maximum allowable power dissipation per unit length of wire. Critical radius of insulation. SCHEMATIC: Wire Egen, D = 2 mm Rtc 3x10-4 m²-K/W Air q' Tw,o Tin,i ww Rt.c R'cond Tin,o Το www. R'conv Insulation, t = 2 mm k = 0.13 W/m-K Tmax = 50°C Tap=20°C h = 10 W/m²-K ASSUMPTIONS: (1) Steady-state, (2) One-dimensional radial conduction through insulation, (3) Constant properties, (4) Negligible radiation exchange with surroundings.
KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of rubberized sheath. Contact resistance between sheath and wire. Convection coefficient and ambient air temperature. Maximum allowable sheath temperature. FIND: Maximum allowable power dissipation per unit length of wire. Critical radius of insulation. SCHEMATIC: Wire Egen, D = 2 mm Rtc 3x10-4 m²-K/W Air q' Tw,o Tin,i ww Rt.c R'cond Tin,o Το www. R'conv Insulation, t = 2 mm k = 0.13 W/m-K Tmax = 50°C Tap=20°C h = 10 W/m²-K ASSUMPTIONS: (1) Steady-state, (2) One-dimensional radial conduction through insulation, (3) Constant properties, (4) Negligible radiation exchange with surroundings.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
Related questions
Question
Pls handwrite
Transcribed Image Text:KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of rubberized sheath.
Contact resistance between sheath and wire. Convection coefficient and ambient air temperature.
Maximum allowable sheath temperature.
FIND: Maximum allowable power dissipation per unit length of wire. Critical radius of insulation.
SCHEMATIC:
Wire
Egen, D = 2 mm
Rtc 3x10-4 m²-K/W
Air
q'
Tw,o Tin,i
ww
Rt.c R'cond
Tin,o
Το
www.
R'conv
Insulation, t = 2 mm
k = 0.13 W/m-K
Tmax = 50°C
Tap=20°C
h = 10 W/m²-K
ASSUMPTIONS: (1) Steady-state, (2) One-dimensional radial conduction through insulation, (3)
Constant properties, (4) Negligible radiation exchange with surroundings.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 3 images
Recommended textbooks for you
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY