logarithmic mean temperature difference calculator

enter the value and click "calculate", the calculation result will be displayed.

`LMTD=[(T_1-t_2)-(T_2-t_1)]/[I n[(T_1-t_2)]/[(T_2-t_1)]] `
T1 = heat inlet temperature
T2 = heat outlet temperature
t1 = cold flow inlet temperature
t2 = cold outlet temperature

enter a value:

heat flow inlet temperature (t1):
°F
heat outlet temperature (t2):
°F
cold flow inlet temperature (t1):
°F
cold outlet temperature (t2):
°F

calculation result:

logarithmic mean temperature difference (lmtd):
°F
logarithmic mean temperature difference calculator

the log mean temperature difference (lmt) method is used to determine the temperature driving force for heat transfer in flow systems. this method is the logarithmic average temperature difference between the hot water flow and the cold water flow at both ends of the heat exchanger.

this calculator is used to calculate the logarithmic mean temperature difference (i.e. the flow of heat, liquid or gas is parallel from left to right and therefore the cold flow is the same).

the larger the logarithmic mean temperature difference, the more heat is transferred. this method is used to analyze thermal properties directly in terms of constant flow and fluid heat transfer.
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