Question:-
A cross-flow type air-heater has area of 50 m2. The overall heat transfer coefficient is 100 W/m2 K and heat capacity of both hot and cold stream is 1000 W/k. the value of NTU is
Option (A)
1000
Option (B)
500
Option(C)
5
Option(D)
0.2
Correct Option:
(C)
Question Solution:
NTU = (UA/Cmin) = ((50 x 100) /1000)= 5
Cmin is minimum of heat capacity of cold and heat fluid
question-answer-faq-6065