In a heat exchanger, one transfer unit means
A)A section of the exchanger in which change in temperature of one stream equals the average driving force in the section
B)The size of the exchanger in which heat transfer rate is 1 kcal/hr
C)Both (A) and (B)
D)None of these

Question

Quizplus · Accepted Answer

In a heat exchanger, one transfer unit (NTU) is defined as a section of the exchanger in which the change in temperature of one fluid stream equals the average driving temperature difference across the section. This concept is used to analyze and design heat exchangers by relating the heat transfer to the flow rates and specific heat capacities of the fluids involved.

In a Heat Exchanger, One Transfer Unit Means