LMTD Calculation (Heat Exchanger)
Compute Log Mean Temperature Difference for co-current and counter-current flow. Includes Kern F-correction for 1–2 shell-&-tube and optional area sizing.
Inputs
Optional: Duty & Area
Area estimate: A = (Q×1000) / (U × F × LMTD). Set Q and U to compute. Adjust safety factor as per site practice.
Results
ΔT1— K
ΔT2— K
LMTD (ideal)— K
F (correction)1.00
ΔTeffective = F × LMTD— K
Area (if Q & U provided)— m²
Note: If either ΔT becomes ≤ 0, the configuration causes a temperature cross; revise outlet targets or switch arrangement.
© LMTD tool. Engineering aid — verify with project standards (TEMA/ASME/API).
