Consider a horizontal 5-mm-thick, 80-mm-long straight fin fabricated from plain carbon steel (k = 57 W/m-K, = 0.5). The base of the fin is maintained at 100°C, while the quiescent ambient air and the surroundings are at 25°C. Assume the fin tip is adiabatic, and estimate the fin heat rate per unit width, q', in W/m. Use an average fin surface temperature of 80°C to estimate the free convection coefficient, and the linearized radiation coefficient, ,, in W/m²K. d's= h= h₂ i i i W/m W/m2.K W/m².K

Consider a horizontal 5-mm-thick, 80-mm-long straight fin fabricated from plain carbon steel (k = 57 W/m-K, = 0.5). The base of the fin is maintained at 100°C, while the quiescent ambient air and the surroundings are at 25°C. Assume the fin tip is adiabatic, and estimate the fin heat rate per unit width, q', in W/m. Use an average fin surface temperature of 80°C to estimate the free convection coefficient, and the linearized radiation coefficient, ,, in W/m²K. d's= h= h₂ i i i W/m W/m2.K W/m².K

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

I need help on 2b
A vertical cylinder 1.5m height and 18 cm in diameter is maintained at 100° C in an atmosphere environment of 20˚ C. Calculate the heat loss by free convection from the surface of the cylinder. Use the following data: p=1.06 kg/m³ v= 18.97x106 m²/s, k-0.1042 W/mK and Pr=0.6975 Nu =0.1 (Ra)¹/3
The rear window of an automobile is defogged by passing warm air over its inner surface. If the warm air is at T∞,i=40°C and the corresponding convection coefficient is hi=30 W/m2·K, what are the inner and outer surface temperatures, in °C, of 4-mm-thick window glass, if the outside ambient air temperature is T∞,o= -27.5°C and the associated convection coefficient is ho=65 W/m2·K? Evaluate the properties of the glass at 300 K. a. what is the heat flux through the original walls in W/ m^2? b. what is the heat flux through the retrofitted walls in w /m^2?
Can someone please help me to solve all of the following question showing all work and explanation as well as graphs needed in excel with formulas. Thank you!
A cylindrical resistor element on a circuit board dissipates 0.22 W of power in an environment at 28°C. The resistor is 1.2 cm long, and has a diameter of 3 mm. Assuming heat to be transferred uniformly from all surfaces. What is the surface temperature of the resistor for a combined convection and radiation heat transfer coefficient of 13 W/m . C?
I need the answer as soon as possible
A industial fireclay brick wall is contructed with 0.15 m thickness (K=1.7 W/m-K). The inner and outer surface temperatures are 1400K and 1150K, respectively. Calculate the heat loss in KW through the wall with a dimension of 0.5m by 1.2m.
A 30-m-long section of an 8-cm-diameter horizontal hot water pipe passes through a large room whose temperature is 20°C. If the outer surface temperature of the pipe is 70°C, determine the rate of heat loss from the pipe by natural convection. k = 0.02699 W/m °C Pr = 0.7241, ν = 1.749 ×10-5. Select one: a. 3485.4 W b. 3827.7 W c. 2211.8 W d. 2683.6 W
Can you help me answer my sample problem for my review?
. A hollow sphere with an outer diameter (d,) of 4 cm and outer diameter of 12 cm is kept at an inner surface temperature (T,) of 383 K and outer surface temperature (T,) of 323 K. Calculate the heat transfer and temperature at d = 8 cm. The thermal conductivity of the sphere is 150 W/m°C.
In a manufacturing process, a long 20 cm diameter rods of stainless steel (k = 14.9 W/m.K, p = 7900 kg/m³, c = 477 J/kg.K) are at a uniform temperature of 600°C in a curing oven, from which they are removed and cooled by forced convection in air at 200°C and convection coefficient of 45 W/m2.K. (a) How long does it take for the rod to have a minimum temperature of 360°C? (b) Calculate the maximum temperature at that time?
A common arrangement for heating a large surface area is to move warm air through rectangular ducts below the surface. The ducts are square and located midway between the top and bottom surfaces that are exposed to room air and insulated, respectively. For the condition when the floor and duct temperatures are 30C and 80C, respectively, and the thermal conductivity of concrete is 1.4 W/m*K, calculate the heat rate from each duct, per unit length of the duct. Use a grid spacing with delta x = 2*(delta y), where delta y = 0.125L and L=150mm.