0/1The thermal conductivity of Aluminum material at127°Cand 527 C are 240 and 218 W/m. K,respectively. Determine ko and B, constants for the used material. k=ko (1 + BT) is assumed withT in °C.0/2Heat is generated in a slab of 120 mm thickness with a conductivity of 200 W/m K at a rate of106W/m. Determine the temperature at the mid and quarter planes if the surface of the solid onboth sides are exposed to convection at 30°C with a convection coefficient of 500 W/m K. Alsofind the heat flow rate at these planes and the temperature gradients at these planes.0/31. Determine the heat flow for (i) rectangular fins and (ii) triangular fin of 20 mm lengthand 3 mm base thickness. Thermal conductivity = 45 W/m K. Conwection coefficient h=100 W/m K, base temperature = 120°C surrounding fluid temperature = 35°C. Determinealso the fin effectiveness.2. A circumferential fin on a pipe of 50 mm OD is 3 mm thick and 20 mm long. Using theproperty values and other parameters in 1, determine the:(i)%3Dheat flow and effectiveness(ii)If the pitch is 10 mm, determine the increase in heat flow for 1 m length of pipe. Alsodetermine the total efficiency.Circumterential rectangular finRectangular and Triangular fins1001008080fac6060404020200.51.01.52.02.53.00.51.01.52.02.53.00.50.5h1.51.5LkApkApLe = L+=, +L,A, = t(r-r) A, = 27(r-r)4 =L+ Rectangular finA, = tL,L =LA, = 2L, (DepthTriangular finFin efficiency, %Fin efficiency, %#%23

Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Answered: 0/1 The thermal conductivity of…

0/1 The thermal conductivity of Aluminum material at127°Cand 527°C are 240 and 218 W/m. K, respectively. Determine ko and B, constants for the used material. k=ko (1 +BT) is assumed with T in °C.

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

GChoose the right answer 1. The temperature profile for steady hest conduction through a plane wall of constant thermal conductivity is a. logarithmic b. parabolic 2. A brick wall (k-0.75 W/mK ) transmits $02 of heat loss through another wall (k-0.25 W/mK, x-100 mm). If the temperature difference across both walls is the same, the thickness of the brick wall would be a.150 mm c. linear 6T b. 240 mm c. 300 mm d. 375 mm 3. The maximum temperature at the center of the solid sphere of radius R having heat generation q (W/m') is given by g'R +9R b. T, + 4k T+9R 6k d. T+9R 8k a. 2k C. 4. The internal thermal resistance of a solid can be ignored if the Biot number is less than a. 1 b. 0.5 c. 0.1 d. Fourier number 5. The ratio of heat transfer of a fin to the heat transfer without fin is referred to as a. fin resistance b. fin efficieney efin effectiveness d. fin conductance.
Temperature differences for Thermal efficiencies do not have to be converted to absolute temperature. true or false?
Unit of thermal conductivity in S.I. units is (a) J/m2 sec (b) J/m °K sec (c) W/m °K (d) (a) and (c) above (e) (b) and (c) above.
3. 100-gram oil at 20°C and 50-gram iron at 75 °C are placed in 200-gram iron container. The increase in temperature of the container is 5°C and the specific heat of oil is 0.43 cal/g °C. What is the specific heat of the iron?
Heat Transfer
W m-°C. 1.)A 2mx2m aluminum sheet (240 is 5mm thick and used to separate two types of gas (1.1) and (55) in an experimental chamber. The 1st type of gas is maintained at 20℃ while the 2nd gas is at -20C. Solve for the rate of heat transfer in kW.
b) Consider steady-state conditions for one-dimensional conduction in a plane wall having a thermal conductivity k = 50 W/mk and a thickness L = 0.25 m, with no internal heat generation. Determine i) the heat flux and the unknown quantity for each case; and ii) sketch the temperature distribution, indicating the direction of the heat flux. Ti(°C) 50 T2(°C) -20 dT/dx (K/m) ġ(W/m?) Case 1 70 160 3 40 -80
A) Answer the question shown in the image
Please show complete solutions and detailed drawings. Show conversions, units, and box in the final answers
Determine the resistance of an aluminium coil of 102 cm as diameter consists of 15900 turns and the mean length per turn is 3450 cm. Take the electrical conductivity of the aluminium coil as 0.2 MS/m. Solution: Area of Cross-section of the Coil (in m2) Total Length (in m) The Resistance of the Coil (in Q)
1-) Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mould cavity. A circular die (k = 150 W/mK, T = 125 °C) is used to drill a hole (D = 0.5 m) along length L = 3 m through a cylindrical metal (D = 2 m) as shown in the figure. A cooling fluid (k = 0.6 W/mK) passes through the hole during the process to keep the inner surface temperature of the hole to 85 °C. In the meantime, the outer surface temperature of the cylinder is held at 30 °C. The hole is drilled eccentrically (not in the origin of the cylinder, 0.1 m perpendicular distance) as shown in the figure. If the heat loss through the cylinder is XY kW during this process, what is the thermal conductivity of the cylindrical metal? (Take the heat loss value XY as a 49 2m 0.1m %3D 3m