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sci.heat-exchanger-LMTD-correction Calculator
Calculates LMTD correction factor F for non-counter-flow heat exchangers: Q = UA×F×LMTD_cf, from NTU and R = (T₁−T₂)/(t₂−t₁). F < 0.75 indicates a thermodynamically inefficient configuration — multiple shells in series or counter-flow arrangement should be used instead.
Inputs
T Hot In C
Reference formula or conversion factor shown for context.
T Hot Out C
Reference formula or conversion factor shown for context.
T Cold In C
Reference formula or conversion factor shown for context.
T Cold Out C
Reference formula or conversion factor shown for context.
F Factor
A multiplier applied in the calculation.
Results
counterflow LMTD (°C)
Total number of items or occurrences.
effective LMTD with F factor (°C)
A dimensionless multiplier applied in the calculation.
temperature ratio R = (Thi−Tho)/(Tco−Tci)
The proportional relationship between two quantities.
thermal effectiveness P
Sample size or count used in the calculation.
LMTD = (ΔT₁−ΔT₂)/ln(ΔT₁/ΔT₂)
Sample size or count used in the calculation.
F factor guidance
A dimensionless multiplier applied in the calculation.