In a counter-flow heat exchanger, if the hot and cold fluids enter at T 1 and T 2 respectively, while the cold fluid leaves at T 3 and the hot fluid leaves at T 4 , then the Logarithmic Mean Temperature Difference (LMTD) is given by:

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Physics · Heat Transfer

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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(T 1 - T 3 ) - (T 4 - T 2 ) ln (T 1 - T 3 ) (T 4 - T 2 )

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Answer 1

(T 1 - T 3 ) - (T 4 - T 2 ) ln (T 1 - T 3 ) (T 4 - T 2 )

Answer 2

(T 1 - T 2 ) - (T 3 - T 4 ) ln (T 1 - T 2 ) (T 3 - T 4 )

Answer 3

(T 1 - T 2 ) + (T 3 - T 4 ) ln (T 1 - T 2 ) (T 3 - T 4 )

Answer 4

(T 1 - T 3 ) - (T 2 - T 4 ) ln (T 1 - T 3 ) (T 2 - T 4 )

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