Chemical Engineering - Mass Transfer - Discussion
Discussion Forum : Mass Transfer - Section 1 (Q.No. 15)
15.
Which is the controlling factor for a drum drier?
Discussion:
10 comments Page 1 of 1.
Someone said:
1 decade ago
What is the meaning of 'controlling factor'?
Sopulu said:
10 years ago
Controlling factor means the Principle on which a process is based.
In case of drying its heat transfer.
In case of drying its heat transfer.
Jamirul Islam said:
8 years ago
Simultaneously heat and mass transfer occur in drying. So I think the answer should be (C).
Rashmi said:
7 years ago
Then what will be the correct answer? please explain.
Vishal Bhardiwala said:
7 years ago
Diffusion and heat transfer must occur simultaneously.
Neel said:
7 years ago
There should be heat and mass transfer simultaneously so the answer should be (c).
DHAVAL PATANWADIYA said:
5 years ago
In this type of dryer, drying takes place by internally heated drum; the material is outside the drum so first heat is transferred then the mass is transferred so controlling factor is heat transfer rather than the diffusion.
(2)
Mungam Damodhar Rao said:
4 years ago
Heat transfer is the slow step than mass transfer in drier. So contolling step is slowest step i.e. heat transfer.
HITENDRA PADHIYAR said:
4 years ago
@Mungam Rao.
I think MT is slower than HT because MT involves physical contact.
I think MT is slower than HT because MT involves physical contact.
HIMANSHU SHURMA said:
1 month ago
In a drum dryer, a thin film of liquid or slurry is spread over rotating, heated drum, and the moisture evaporates due to the heat.
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