Log mean temperature difference Totally Explained

Everything about The Log Mean Temperature Difference totally explained

The log mean temperature difference (LMTD) is used to determine the temperature driving force for heat transfer in flow systems (most notably in heat exchangers). The LMTD is a logarithmic average of the temperature difference between the hot and cold streams at each end of the exchanger. The use of the LMTD arises straightforwardly from the analysis of a heat exchanger with constant flow rate and fluid thermal properties - see for example ref 1. p453. For Countercurrent flow (for example where the hot stream,liquid or gas, goes from say left to right, and the cold stream, again liquid or gas goes from right to left), is given by the following equation:
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LMTD=frac=C

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