EngiRef / Formulas
Log Mean Temperature Difference
Effective temperature difference for heat exchangers
Heat Transfer
Source Details
Id
thermo-lmtd
Name
Log Mean Temperature Difference
Discipline
thermodynamics
Category
Heat Transfer
Latex
LMTD = \frac{\Delta T_1 - \Delta T_2}{\ln(\Delta T_1 / \Delta T_2)}
Description
Effective temperature difference for heat exchangers
Conditions
Counter-flow or parallel-flow heat exchanger
Variables
[
{
"symbol": "LMTD",
"name": "Log Mean Temp Diff",
"unit": "K",
"siUnit": "K",
"imperialUnit": "°F"
},
{
"symbol": "ΔT₁",
"name": "Temp Diff at End 1",
"unit": "K",
"siUnit": "K",
"imperialUnit": "°F"
},
{
"symbol": "ΔT₂",
"name": "Temp Diff at End 2",
"unit": "K",
"siUnit": "K",
"imperialUnit": "°F"
}
]Solve For
LMTD
Tags
lmtd, heat, exchanger, temperature, difference
Is Custom
false