Consider a vertical 3-m-diameter cylindrical furnace whose surfaces closely approximate black surfaces. The base, top, and side surfaces of the furnace are maintained at 400 K, 600 K, and 900 K, respectively. If the view factor from the base surface to the top surface is 0.2, determine the net radiation heat transfer from the bottom surface. (Solve using EES.) The net radiation heat transfer from the bottom surface = -255.36 kW.

Consider a vertical 3-m-diameter cylindrical furnace whose surfaces closely approximate black surfaces. The base, top, and side surfaces of the furnace are maintained at 400 K, 600 K, and 900 K, respectively. If the view factor from the base surface to the top surface is 0.2, determine the net radiation heat transfer from the bottom surface. (Solve using EES.) The net radiation heat transfer from the bottom surface = -255.36 kW.

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

8. A black body has an effective surface temperature of 1000°C. Determine: (a) The total radiation energy (W/m?) that can be emitted by the black body (b) Determine total radiation energy (W/m?) that can be emitted by the black body within the 1-5 um wavelength range (c) The spectral blackbody emissive power at a wavelength of 2.5 um. (d) At what wavelength will this body have the maximum spectral blackbody emissive power.
Calculate the net heat flux per unit area and by radiation between two infinitely large parallel plates with a very small space between them. They both behave as black bodies and are kept at 1000K and 500K, respectively.
- A furnace can be considered like a long semicylindrical duct of diameter D = 5 m. The base (1) and the dome (2) of the furnace have emissivity's of 0.5 and 0.9 and are maintained at uniform temperatures of 305 and 1000 K, respectively. a- Draw the network of the system. b- Calculate total resistance. b- Determine the net rate of radiation heat transfer per unit length from the dome to the base surface.
An engineer is investigating objects that can be used as a solar collector. One ofthe objects considered is the object made of aluminum and is coated with leadsulfate. Investigation shows that the reflectivity of this object is 0.2 for radiationat wavelengths less than 3.3 μm and 0.95 for radiation greater than 3.3 μm. Inorder to get better insight into the behavior of the object, as a candidate for asolar absorber, the object is then exposed to two different conditions: a solarradiation (T ~ 5800 K) and a room temperature (T ~ 300 K). What is the energyreflected by the object at these two conditions?
All information are given. Please need Correct answer!!!!
For a surface, how is irradiation defined? For diffusely incident radiation, how is irradi ation on a surface related to the intensity of incident radiation?
5. Research about the Crossed-Strings Method. Then, solve the problem using that method: Two infinitely long parallel cylinders of diameter D are located a distances apart from each other. Determine the view factor F12 between these two cylinders.
Question 30 of 30 く - / 4.3 View Policies Current Attempt in Progress Two concentric spheres of diameter D = 0.8 m and D2 = 1.2 m are separated by an air space and have surface temperatures of T = 410 K and T2 = 300 K. (a) If the surfaces are black, what is the net rate of radiation exchange between the spheres, in W? 912 = W (b) What is the net rate of radiation exchange between the surfaces if they are diffuse and gray with &j = 0.5 and ɛ2 = 0.05, in W? 912 = i W (c) What is the net rate of radiation exchange if D2 is increased to 20 m, with ɛ2 = 0.05, ɛ = 0.5, and D = 0.8 m, in W? 912 = W (d) What is the net rate of radiation exchange if the larger sphere behaves as a black body (ɛ2 = 1.0) and with &j = 0.5, D2 = 20 m, and D = 0.8 m, in W? 912 = i W Physical Properties Mathematical Functions II
Consider a cuboidal furnace (l = 5 m, b = 4 m, h = 3 m), whose surfaces closely approximateblack surfaces. The base, top, and side surfaces of the furnace are maintained at uniformtemperatures of (1040) K, (840) K, and (540) K, respectively. Determine (a)the net rate of radiation heat transfer between the base and the side surfaces, (b) the net rate ofradiation heat transfer between the base and the top surface, and (c) the net radiation heattransfer from the base surface. Steam in a heating system flows through tubes whose outer radius is r1 = (3) cm and whosewalls are maintained at a temperature of 127 °C. Circular aluminum fins (k = 180 W/m K) ofouter radius r2 = (6) cm and constant thickness t = 1 mm are attached to the tube. The spacebetween the fins is 3 mm. Heat is transferred to the surrounding air at 27 °C, with a combinedheat transfer coefficient of 60 W/m2 K. Determine the increase in heat transfer from the tubeper meter of its length as a result of adding fins
es Check my work Required information Irradiation on a semi-transparent medium is at a rate of 610 W/m2. If 160 W/m2 of the irradiation is reflected from the medium and 130 W/m2 is transmitted through the medium, Determine the absorptivity of the medium. The absorptivity of the medium is.
A furnace has the shape of a cylinder and has R = H = 2m as its dimensions. The temperatures on the base, top, and side surfaces of the furnace are kept constant at 500, 700, and 1200 K accordingly. All three surfaces are black. Determine the net rate of radiation heat transfer from or to the top surface when the system is operating at a steady state.
Example: The view factors between the rectangular surfaces shown in the figure are to be determined.