In the given formula for overall heat transfer coefficient in Rising film evaporators, What is the term hOD? \(\frac{1}{U}=\frac{1}{ho}+\frac{1}{h_{OD}}+(\frac{Do}{Di})(\frac{1}{h_{ID}})+ (\frac{Do}{Di})(\frac{1}{hi})\)

Outside film heat transfer coefficient

Inside film heat transfer coefficient

In the given formula for overall heat transfer coefficient in Rising

1.	In the given formula for overall heat transfer coefficient in Rising film evaporators, What is the term hOD? \(\frac{1}{U}=\frac{1}{ho}+\frac{1}{h_{OD}}+(\frac{Do}{Di})(\frac{1}{h_{ID}})+ (\frac{Do}{Di})(\frac{1}{hi})\)
A.	Outside dirt coefficient
B.	Inside dirt coefficient
C.	Outside film heat transfer coefficient
D.	Inside film heat transfer coefficient
Answer» B. Inside dirt coefficient

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In the given formula for overall heat transfer coefficient in Rising film evaporators, What is the term hOD? \(\frac{1}{U}=\frac{1}{ho}+\frac{1}{h_{OD}}+(\frac{Do}{Di})(\frac{1}{h_{ID}})+ (\frac{Do}{Di})(\frac{1}{hi})\)

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