Air at 20°C blows over a 50 x 75 cm hot plate made of carbon steel (AISI 1010) with 2 cm thickness. The outer surface temperature of the plate is maintained at 300°C. The convection heat transfer coefficient is 25 W/m2.K. 300 W is lost from the plate surface by radiation, calculate the inside plate temperature.

Air at 20°C blows over a 50 x 75 cm hot plate made of carbon steel (AISI 1010) with 2 cm thickness. The outer surface temperature of the plate is maintained at 300°C. The convection heat transfer coefficient is 25 W/m2.K. 300 W is lost from the plate surface by radiation, calculate the inside plate temperature.

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

Design a solar chimney to cover 80% of total heating losses in February, where U value for the chimney=D0.4 W/m2.K and the total wall area of the spaces equal 60m² and the temperature outside are 30C at night and 8°C at day and the temperature for the interior is 23 Ос.
2. Air at 20° blows over a hot plate 50X60 cm made of carbon steel maintained at 220°. The convective heat transfer coefficient is 25W/m²K. What will be the heat loss from the plate in W?
Required information Air flows in a pipe under fully developed conditions with an average velocity of 1.25 m/s and a temperature of 24°C. The pipe's inner diameter is 4 cm, and its length is 4 m. The first half of the pipe is kept at a constant wall temperature of 100°C. The second half of the pipe is subjected to a constant heat flux of 200 W. The properties of air at 80°C are p = 0.9994 kg/m³, k = 0.02953 W/m-K, v= 2.097 x 10-5 m²/s, cp=1008 J/kg-K, and Pr = 0.7154. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Air 1.25 m/s 2m T, = 100°C D = 4 cm 2 m g, = 200 W Determine the wall temperature at the exit of the tube. The wall temperature at the exit of the tube is 282 * °C.
7. Air at 600 K, 1 atm is flowing across a flat plate kept at 300 K with a convection coefficient of 91 W/m2 K. If the Stanton number at this condition of flow is 0.039. what is the velocity of the air? Express your answer in m/s.
Calculate the ratio of thermal-boundary-layer thickness to hydrodynamic-boundary- layer thickness for the following fluids: air at 1 atm and 20°C, water at 20°C, helium at 1 atm and 20°C, liquid ammonia at 20°C, glycerine at 20°C.
Question 1 15 points Save Answ Engine oil at 87°C flows over the upper surface of a 5-m-long flat plate whose temperature is 18°C with a velocity of 5 m/s. Determine the total drag force and the rate of heat transfer per unit width of the entire plate (Insert answer for Fp, h and Q) W/m2K kW
Determine the thermal boundary thickness(mm) of flow over a flat plate which has a 0.5 mm boundary layer thickness. Take u= 25 x 10 Pas, C,=2.0 kJ/kg K and k=0.05 W/m K.
Air at 20 °C blows over a hot plate 50 by 75 cm maintained at 250 °C. The convection heat-transfer coefficient is 30 W/m2·K. Find:Calculate the convective heat transfer rate.Assuming that the plate is made of carbon steel (1% C) 2 cm thick and that additional 300 W is lost from the plate surface by radiation besides convection heat transfer, calculate the plate temperature on the other side.(Note: the thermal conductivity of carbon steel (1% C) is about 43 W/m·K)
In the arctic sea, the ice sheets are melting. Let's calculate the temperautre distribution in one such ice sheet. The sheet is 2 m thick. Under the sheet there is ice-water mixture and it can be assumed that the temperature of the bottom surface of the ice sheet is approximately 0°C. Air at -20°C is blowing above the sheet. The convection coefficient of air is 15 W/m².K. The thermal conductivity of ice is 2.2 W/m.K. What is the temperautre of icesheet at its center (i.e., at 1 m from the surface)?
Fruit is impeded from ripening when it reaches high temperatures (>32°C). Farmer Joe isworried that Deleware's summer heat wave will affect the ripening of his ground cherries.The spherical fruit (1 cm in diameter) is surrounded by a spherical papery husk (λhusk = 0.3W/m K) with an inner diameter of 2 cm and an outer diameter of 2.1 cm. The air in betweenthe fruit and the husk is stagnant (λair = 0.03 W/m K). On a calm day in July, the delewareair (outside of the husk) is very warm, with a temperature of ~38°C and a heat transfercoefficient of h deleware,calm = 10 W/m 2K. (a) Sketch the system, labeling all temperatures, dimensions, and proportionality constants. (b) sketch the electrical analogy tothis system, labeling all temperatures, resistances, and heat flows (c) what is the overall resistance to heat transfer from the air in Deleware to the fruit?