LMTD (Heat Exchanger)

Calculate the log mean temperature difference and heat duty of a heat exchanger.

ΔT at One End (°C)

ΔT at Other End (°C)

U (W/m²·K, optional)

Area (m², optional)

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LMTD = (ΔT₁ − ΔT₂) ÷ ln(ΔT₁ ÷ ΔT₂). Add the overall heat-transfer coefficient and area to get heat duty Q = U·A·LMTD.