In heat exchanger design, one transfer unit means
A)Condition when the change in temperature of 1°C numerically equals the average driving force.
B)The equivalent length of tubes in case the heat exchange was for a temperature difference of 1°C
C)One fluid exchanging with another fluid of the same chemical composition
D)The section of heat exchanger where heat transfer surface area is one square metre
E)The section of heat exchanger which will cause temperature drop of one degree centigrade

Question

Quizplus · Accepted Answer

One transfer unit (NTU) in heat exchanger design is a dimensionless parameter used to describe the heat transfer capability of the heat exchanger. It is defined as the condition when the change in temperature of one fluid stream over the heat exchanger equals the average temperature difference driving the heat transfer, normalized by the overall heat transfer coefficient and the heat transfer area. This concept is crucial for understanding and analyzing the performance of heat exchangers.

In Heat Exchanger Design, One Transfer Unit Means