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Chemical Engineering - Heat Transfer - Discussion

Discussion Forum : Heat Transfer - Section 10 (Q.No. 5)
Heat Transfer
5.
Pick out the wrong statement.
In process heat exchangers, saturated steam is preferred over the superheated steam.
The maximum is the emissive power of a surface at a temperature T1 occurs at a wavelength of λ1. If the surface temperature is halved, the maximum in the emissive power would occur at a wavelength of 0.5 λ1.
When a vertical plate is heated in infinite air environmental under natural convection conditions, the velocity profile in air, normal to the plate, exhibits a maximum.
A body at 925 K emits an energy of 1.42 x 1011σW/m2 (σ is the Stefan-Boltzman constant) in the wavelength band between 3 μm to 4 μm. The fraction of this energy in the total energy emitted over the entire wavelength range is equal to emissivity.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
1 comments Page 1 of 1.
H.S. said:   7 years ago
Here λ is inversely proportional to T. (IN DISPLACEMENT)
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