Question
Download Solution PDFA cross-flow type air heater has an area of 50 m2. The overall transfer coefficient is 100 W/m2 K; and heat capacity of the stream, be it hot or cold, is 1000 W/K. What is the NTU?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
NTU is a measure of the effectiveness of the heat exchanger.
The NTU is a measure of the heat transfer size of the exchanger; larger the value of NTU, the closer the heat exchanger approaches its thermodynamic limit.
\(NTU = \frac{{UA}}{{{C_{min}}}}\)
Cmin is the minimum heat capacity between the hot and cold fluid
Calculation:
Given:
A = 50 m2, U = 100 W/m2 K,
Cmax = Cmin = 1000 W/K
\(NTU = \frac{{100 \times 50}}{{1000}} = 5\)Last updated on Jun 23, 2025
-> UPSC ESE result 2025 has been released. Candidates can download the ESE prelims result PDF from here.
-> UPSC ESE admit card 2025 for the prelims exam has been released.
-> The UPSC IES Prelims 2025 will be held on 8th June 2025.
-> The selection process includes a Prelims and a Mains Examination, followed by a Personality Test/Interview.
-> Candidates should attempt the UPSC IES mock tests to increase their efficiency. The UPSC IES previous year papers can be downloaded here.