LMTD Heat Exchanger Calculator

Calculate Log Mean Temperature Difference LMTD = (ΔT_1 − ΔT_2)/ln(ΔT_1/ΔT_2). Apply Q = U × A × LMTD × F with F-correction factor for multi-pass exchangers. Compare counter-flow vs parallel-flow.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How to Use

Enter the values for the patient or scenario you are assessing. Calculate Log Mean Temperature Difference LMTD = (ΔT_1 − ΔT_2)/ln(ΔT_1/ΔT_2). Apply Q = U × A × LMTD × F with F-correction factor for multi-pass exchangers. Compare counter-flow vs parallel-flow. Use the lmtd result to inform your clinical assessment.

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Frequently Asked Questions