[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

Carbon steel (AISI 1010) shafts of 0.1-m diameter are heat treated in a gas-fired furnace whose gases are at 1200 K and provide a convection coefficient of 100 W/m².K. If the shafts enter the furnace at 220 K, use the lumped capacitance model to estimate how long must they remain in the furnace to achieve a centerline temperature of 800 K? Use p = 7832 kg/m³, k = 51.2 W/(mK), c = 541 J/(kg-K) and a = 1.21 x 10-5 m²/s. They must remain in the furnace for i S.
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
Problem 3 An annular aluminum (k = 240 W/m.K) fin of rectangular profile is attached to a circular tube that has an outside diameter of 30 mm and a surface temperature of 250°C. The fin is 2 mm thick and has an outside diameter of 88 mm. The temperature and the convection coefficient associated with the adjoining outside fluid are 25°C and 35 W/m?.K, respectively. (a) What is the heat loss per fin? (b) If 200 such fins are spaced uniformly per meter along the tube length, determine the heat loss per meter of tube length.
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 300 mm thick wall (k= 1.5 W/mK, p = 2600 kg/m³, cp = 1000 J/kg⚫K) has a uniform original temperature of 900 °C. At the time t = 0, its both surfaces are suddenly exposed to air (T∞ = 25 °C, h = 30 W/m²K). (a) Calculate the Biot number of the wall. Does it have a uniform temperature? (b) After 3 hours, what is the temperature at the middle plane (@x = 0)? Symme try ½ L= 300 mm h = 30 W/m² K wall T∞ = 25°C h = 30 W/m² K To=25°C 9. Ah (T-To G=ept Hot air x p = 2600 kg/m³ k=1.5 W/m K 900c Hot air Tr= 96w arrume te Now.
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)?

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