image Guest

You need to login to ask any Questions from chapter Diffusion-in-Solids-and-Molecular-Diffusion-in-Fluids of Mass-Transfer

Chapter:

Diffusion-in-Solids-and-Molecular-Diffusion-in-Fluids

Estimate heat transfer from a 40 W incandescent bulb at 125 degree Celsius to 25 degree Celsius in quiescent air. Approximate bulb as a 50 mm diameter sphere. The approximate correlation for convection coefficient is
Nu = 0.60 (Gr Pr) 0.25
Where different parameters are evaluated at mean film temperature, and characteristics length is diameter of sphere


Hint Answer

Previous Question
Next Question

All Chapters

View all Chapter and number of question available From each chapter from Mass-Transfer

Similar Question

This Chapter Diffusion-in-Solids-and-Molecular-Diffusion-in-Fluids consists of the following topics

Two horizontal steam mains with diameters 5 cm and 15 cm are to be laid in a boiler house that any mutual heat effect is precluded. The mains are at the same surface temperature of 500 degree Celsius whilst the ambient air is at 50 degree Celsius. Workout the ratios of the heat transfer coefficients

Estimate heat transfer from a 40 W incandescent bulb at 125 degree Celsius to 25 degree Celsius in quiescent air. Approximate bulb as a 50 mm diameter sphere. The approximate correlation for convection coefficient is
Nu = 0.60 (Gr Pr) 0.25
Where different parameters are evaluated at mean film temperature, and characteristics length is diameter of sphere

Consider the above problem, workout the heat losses from one meter length of the mains

Estimate the heat transfer from a 40 W incandescent bulb at 125 degree Celsius to 25 degree Celsius in quiescent air. Approximate the bulb as a 50 mm diameter sphere. The approximate correlation for the convection coefficient is Nu = 0.60 (Gr Pr) 0.25 Where the different parameters are evaluated at the mean film temperature

and characteristics length is the diameter of the sphere

Diffusion in Solids and Molecular Diffusion in Fluids

Mass-Transfer