[Fins] A straight fin of rectangular cross section fabricated from an aluminum alloy (k =185 W /m · K) has a base thickness of t = 3 mm and a length of L = 15 mm. Its base temperatureis T, = 100°C, and it is exposed to a fluid for which T = 20°C and h = 50 W /m² · K.For the foregoing conditions and a fin unit width, calculate the fin heat rate, efficiency,and effectiveness.b. Compare the foregoing results with those for a fin fabricated from pure copper (k =400 W /m · K). Comment your observation from the contrasting results.

Answered: Image /qna-images/answer/d18e1354-edc7-4f47-ac0d-4ffdf33f82d7.jpg

Answered: [Fins] A straight fin of rectangular…

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

See similar textbooks

Similar questions

Pressurized steam flows through a pipe of 0.6 m diameter. The pipe is embedded in a concrete block ,conductivity k = 1.4 W/mK ,with a square cross sectional length, w = 1 m. The required surface temperature values are 401 and 301 in K. Calculate the heat loss from the pipe per unit length. w Concrete T1 T2 D = 0.6 m
It is intended to reduce heat losses of a glass window (k = 1.4 W/m.K) with 6 mm thick, covering it with a polystyrene insulation (k = 0.027 W/(m.K) with 25 mm thickness. The contact resistance between the glass and the insulation is estimated at 0.002 m². K/W, while the heat transfer coefficient by convection of the outer surface of the window is worth he = 20 W/(m². K). With insulation, the convection heat transfer coefficient in the inner wall is hi = 2 W/m². K; no insulation is hi = 5 W/m². K. If the total surface area of the window is A = 12 m², what are the heat losses associated with insulated and non-insulated window for indoor and outdoor air temperatures Ti= 20 ºC and Te = – 12 ºC?
Problem: A solid copper cube of 10-cm edge length(p =8954 kg/m³, c = 383 J/kg.K, k= 386 W/m.K) initially at a uniform temperature T;= 250°C is suddenly immersed in a well-stirred fluid which is maintained at a uniform temperature T = 50 °C. The heat transfer coefficient between cube and the fluid h=20O W/m²K. A. Check whether the lumped system analysis is suitable. B. Determine the temperature of the copper block at t= 5 min after the immersion. TE 250°C 10 cm Tm= 50 °C, h=200 w/mk
A steel tube having k =46W/m•C has an inside diameter of 3.0 cm and a tube wall thickness of 2 mm is covered with a 3-cm layer of asbestos insulation [k =0.2 WN/m•C]. A fluid flows maintains inside tube surface temperature 223•C while the outside surface insulation temperature is 57 C. Calculate the heat lost by the tube per meter of length and what in the tube-insulator interface temperature?
An overhead 65-m-long, uninsulated industrial steam pipe of 80 mm diameter is routed through a building whose walls and air are at 30 °C. Pressurized steam maintains a pipe surface temperature of 200 "C, and the coefficient associated with natural convection is h = 15 W/m'K. The surface emissivity is e= steam line? 0.6. What is the rate of heat loss from the
12:01 PM A O 1 26 A docs.google.com/forms/ M 16 This is a required question The force acting on the gear tooth is F=40 KN. Resolve this force into two components acting along the lines aa and bb * b F 60° 40° b' F_a=30.17 KN, F_b=D21.10 KN F_a=35.17 KN, F_b=26.10 KN O F_a=25.17 KN, F_b=22.10 KN F_a=15.17 KN, F_b=15.10 KN 口
A square pin fin (w=0.6 mm, L=33 mm) is attached to hot surface [87 mm * 69 mm] Ts= 172°C with convection heat transfer coefficient of (1383 W/m K) and surrounding air at 24°C, if the fin efficiency is 0.81 and the center to center distance between any two successive fins =1.5 mm. What is the heat transfer rate (W) from the base surface ONLY when the fins are attached to it?
Consider a single fin with circular cross-section as shown in the figure below. Geometrical parameters of the fin : • r = 4 mm • L = 10 cm Fin material properties: • Fin thermal conductivity: k = 200 W/mK Thermal boundary conditions: • Base temperature of the fin: Tbase = 80°C • Air temperature: Tair = 25°C • Convective heat transfer coefficient : h= 10 W/m²K Tbase L/4 T1 L/2 L/4 T2 a) Express the heat transfer problem through the fin as a thermal resistance network, derive equations for the unknown temperatures T, and T₂ representing the average temperatures for the control volumes shown in the figure above. b) Express the equations derived in a) in the form of AT = b where T: unknown temperature vector and A: coefficient matrix and solve for T₁ and T₂ c) Now, imagine a very thin wire is located at the center of the fin. The electrical current that goes through the wire generates heat uniformly along the length of the wire. The wire generates heat q = 2 W/m. Update the energy balance…
solve a to c
Heat transfer
A car's rear window is defogged by the passage of hot air over its inner surface. If the hot air is at T∞, i = 40 °C and the corresponding convection heat transfer coefficient is hi = 30 W/(m²K), what are the temperatures of the inner and outer surfaces of the glass, which has 4 mm thick, if the outdoor ambient air temperature for T∞, e = −10 °C and the associated convective coefficient for he = 65 W/(m²K)?
Thermal conductivity of G10 fiberglass is 0.3

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

SEE MORE TEXTBOOKS