Answered: Find the total radiation intensity for…

Find the total radiation intensity for a day when the diffuse radiation is equal to 20% of the direct radiation and if the air mass of an object is twice the length of its shadow

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.3P: Determine the total average hemispherical emissivity and the emissive power of a surface that has a...

See similar textbooks

Related questions

Q: The peak wavelength of radiation emitted by a black body at a temperature of 2000 K is 1.45 pm. If…

A: Given, Temperature T1 = 2000 K Peak wavelength of radiation emitted by body at T1 = λ1 = 1.45 μm…

Q: Calculate the ratio of the radiant energy emitted from a surface at 37ºC and an adjacent surface of…

A: Given: The surface temperature, T1 = 37 C The adjacent surface temperature, T2 = 35 C

Q: In a cylinderical furnace of 1.5 m dia and 2 m length the curved surface is maintained at 1400 K,its…

A: Solution is given below.

Q: At midday when a black paved airport runway is directly under the Sun, it receives 800 W of solar…

Q: Find the view factors of the designated sides 1&3; and 1,2&3 to their surroundings in terms of a&b:…

Q: A radiation flux of 1000W/m is incident upon a surface that absorbs 80 percent of the incident…

Q: A spherical ball of radius 0.62 m and surface temperature 554 oC is suspended vertically in a'very…

Q: 0.3 0.1 3. 7.

A: Any given surface at any given temperature (absolute) will emit thermal radiation in all possible…

Q: You are using a heated cylindrical tube blackbody as a chamber for an experiment. The tube is 2m…

Q: Imagine you have two concentric, coaxial cylindrical tubes with an evacuated annular space, with…

Q: Find the intensity of the total radiation falling on a body in which the diffuse radiation is equal…

Q: Calculate the amount of radiation emitted for a unit surface (1 m2 ) forthe following situations:…

A: Write the expression to calculate the amount of radiation emitted by a surface. Q=σεAT4 Here, the…

Q: Two aligned parallel rectangles with dimensions 6 m * 8 m are spaced apart by a distance of 2 m. If…

Q: Assuming sun to be a black body emitting radiation with maximum intensity at A = 0.5 u calculatione…

Q: A black body absorbs radiant energy at the rate of 5 kW/m2 . Calculate the temperature at which…

Q: ugh its interior. A radiation shieldi nd the tube, providing an air gap reen the tube and the…

Q: the outer surface temperature of the furnace should be kept below 45°C. Based on the above…

Q: Two identical bodies radiate heat to each other. One body is at 30°C and the other at 250°C. The…

Q: A directionally emitting surface has an emissivity of 0.7 for angles up to 45° from vertical and 0.2…

A: Solution: Emissivity = 0.7 for angles upto 45 degrees Emissivity =0.2 for rest of the angles

Q: A spherical tank of diameter D = 2 m that is filled with liquid nitrogen at 100 K is kept in an…

A: Given data: The diameter of the spherical tank is: D=2 m The given temperature of sphere is:…

Q: A surface is maintained at 100°C and is enclosed by very large surrounding surfaces at 80°C. What is…

A: Body temperature = 100 C or 373 K Surrounding temperature = 80 C or 353 K Find radiant flux

Q: The peak wavelength of radiation emitted by a black body at a temperature of 2000 K is 1.45 um. If…

A: GIVEN DATA - λ1=1.45μm T1=2000K WE HAVE TO CALCULATE TEMPRATURE CORRESPONDING TO 2.90 WAVELENGTH

Q: Convert each temperature. 2.735 K to °C (average temperature of the universe as measured from…

A: Given: T= 2.735 K Solution The relation between the degree centigrade and kelvin :…

Q: Consider a conical enclosure of height h and base diameter D. Determine the view factor from the…

Q: Two large parallel plates are maintained at 700 and 300 K respectively. The hotter plate has an…

Q: 1.24 Asphalt pavements on hot summer days exhibit surface tempera- tures of approximately 50 C.…

A: Given Temperature, T = 50oC = 323 K Boltzman constant = 5.67 x 10-8 W/m2 K4

Q: Two adjacent rectangles are perpendicular to each other., The first rectangle is 1.52 x 2.44 m and…

Q: Determine the overall interchange factor from surface A to B where surface A is a spherical shell…

Q: 6.A 3-mm-thick window transmits 90 percent of the radiation between whole ranges of wavelength.…

A: Given data:

Q: The view factor integral in radiation heat transfer between two bodies A, and A, is given by

A: View-factor: In radiation heat transfer, a view-factor is the ratio of the radiation heat transfer…

Q: Define Emissivity of some materials at 300 K.

A: Thermal emissivity(ɛ) coefficient gives the heat or radiation absorbing and emission capacity of a…

Q: What is the solar radiation on a horizontal surface in the absence of the atmosphere at latitude 36°…

A: Given; Date = March 15 latitude = 36°N

Q: How can you determine the view factor F12 whenthe view factor F21 and the surface areas are…

A: Reciprocity theorem: The reciprocity theorem is used to determine the view factor F12 when areas of…

Q: At what rate does the solar wind carry kinetic energy away from the Sun? Give your result first in…

A: Solar wind energy is a flow of charge particles which possess energy and flow away from the sun.…

Q: A surface gains 500 W/m2 heat at an equilibrium temperature of 30 °C and it is subjected to a…

Q: A right circular cylinder has a height of 1 m and diameter of 75 cm. Find the view factor for the…

Q: The peak wavelength of radiation emitted by a black body at a temperature of 1000 K is 1.35 um. If…

Q: An opaque surface at 1000 K if its spectral emissivity is = 0.4, 0.7, and 0.3 for 0 < < 2 μm, 2μm =…

Q: A diffuse surface at 500 K is placed in a large furnace which is kept at 1000 K have the following…

A: Heat transfer is the form of energy that transfers from one system to another system by the virtue…

Q: The temperature of the filament of an incandescent lightbulb is 3200 K. Treating the filament as a…

A: Radiation fraction is calculated for visible range 0.4 to 0.76 micrometer. Given: visible range =…

Q: Example: The view factors between the rectangular surfaces shown in the figure are to be determined.…

A: Calculated view factor of rectangular surfaces.

Question

Find the total radiation intensity for a day when
the diffuse radiation is equal to 20% of the direct
radiation and if the air mass of an object is twice
the length of its shadow

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 6 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Determine the rate of radiant heat emission in watts per square meter from a blackbody at (a) 15C, (b) 600C, and (c) 5700C.
1.28 The sun has a radius of and approximates a blackbody with a surface temperature of about 5800 K. Calculate the total rate of radiation from the sun and the emitted radiation flux per square meter of surface area.
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 816C and 260C, respectively. Determine the rate of heat transfer by radiation between the plates in W/m2 and the radiative heat transfer coefficient in W/m2K.
1.26 Repeat Problem 1.25 but assume that the surface of the storage vessel has an absorbance (equal to the emittance) of 0.1. Then determine the rate of evaporation of the liquid oxygen in kilograms per second and pounds per hour, assuming that convection can be neglected. The heat of vaporization of oxygen at –183°C is .
Three thin sheets of polished aluminum are placed parallel to each other so that the distance between them is very small compared to the size of the sheets. If one of the outer sheets is at 280C and the other outer sheet is at 60C, calculate the temperature of the intermediate sheet and the net rate of heat flow by radiation. Convection can be ignored.
1.25 A spherical vessel, 0.3 m in diameter, is located in a large room whose walls are at 27°C (see sketch). If the vessel is used to store liquid oxygen at –183°C and both the surface of the storage vessel and the walls of the room are black, calculate the rate of heat transfer by radiation to the liquid oxygen in watts and in Btu/h.
11.31 A large slab of steel 0.1 m thick contains a 0.1 -m-di- ameter circular hole whose axis is normal to the surface. Considering the sides of the hole to be black, specify the rate of radiative heat loss from the hole. The plate is at 811 K, and the surroundings are at 300 K.
11.41 Determine the steady-state temperatures of two radiation shields placed in the evacuated space between two infinite planes at temperatures of 555 K and 278 K. The emissivity of all surfaces is 0.8.
11.68 Two infinitely large, black, plane surfaces are 0.3 m apart, and the space between them is filled by an isothermal gas mixture at 811 K and atmospheric pressure. The gas mixture consists of by volume. If one of the surfaces is maintained at 278 K and the other at 1390 K, calculate (a) the effective emissivity of the gas at its temperature, (b) the effective absorptivity of the gas to radiation from the 1390 K surface, (c) the effective absorptivity of the gas to radiation from the 278 K surface, and (d) the net rate of heat transfer to the gas per square meter of surface area.
Determine the total average hemispherical emissivity and the emissive power of a surface that has a spectral hemispherical emissivity of 0.8 at wavelengths less than 1.5m, 0.6 at wavelengths from 1.5to2.5m, and 0.4 at wavelengths longer than 2.5m. The surface temperature is 1111 K.
1.13 If the outer air temperature in Problem is –2°C, calculate the convection heat transfer coefficient between the outer surface of the window and the air, assuming radiation is negligible.