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.
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)
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).
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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