Problems: Radiative Heat Transfer Chemical Engineering Notes | EduRev

Heat Transfer for Engg.

Chemical Engineering : Problems: Radiative Heat Transfer Chemical Engineering Notes | EduRev

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Questions for Practice (Module 7)

Q.1What is the wavelength for thermal and infrared radiation?
Q.2Define black body and grey body emphasising on the differences and similarity.
Q.3If a stainless steel body reflects 45% of the incident solar radiation, what will be the absorptivity and transmissivity?
Q.4What is Wein's law?
Q.5What is the practical advantage of studying radiation shield?
Q.6What is the difference between spectral emissive power and spectral radiation intensity?
Q.7A hollow sphere having 1 m of diameter is evacuated and heated to a interior surface temperature of 600o K. If the sphere has a hole of 0.25 cm of diameter in the wall, how many watts of radiant energy is emitted from the hole. The inner surface of the sphere has an emissivity of (i) 0.9, and (ii) 0.4?
Q.8

Find the view factor for the following geometry, all dimensions are in meter,

Problems: Radiative Heat Transfer Chemical Engineering Notes | EduRev      Problems: Radiative Heat Transfer Chemical Engineering Notes | EduRev

Q.9

A surface has a monochromatic emissivity of 0.2 for all the wavelengths less than or equal to 0.3micrometer and 0.85 for all the wabelengths greater than or equal to 3 micrometer. Find the total emissivity of the surface for a surface temperature of 1100o K. Determine also the solar absorptivity of the surface.

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