Log mean temperature difference in case of counter flow compared to parallel flow will be

Log mean temperature difference in case of counter flow compared to parallel flow will be Correct Answer More

The larger the LMTD more heat is transferred.
In parallel flow heat exchangers both hot fluid and cold fluid flow in same direction. Counter flow heat exchanger: In counter flow heat exchangers both hot fluid and cold fluid flow in opposite direction.

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LMTD in case of counter flow heat exchanger as compared to parallel flow heat exchanger is