Chemical Engineering - Heat Transfer
Exercise : Heat Transfer - Section 9
11.
The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as
12.
What is the logarithmic mean of r1 and r2 ?
13.
Maximum heat transfer rate is achieved in __________ flow.
14.
Wavelength corresponding to the maximum energy is inversely proportional to the absolute temperature. This is __________ law.
15.
Three material A, B and C of equal thick-nes and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of __________ °C.
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