Heat Exchanger LMTD Calculator
The Heat Exchanger Calculator finds the corrected LMTD, effectiveness, and NTU for a shell-and-tube exchanger duty. Example: for a 500 kW counterflow duty cooling water 90→60 °C against 30→50 °C water, Corrected LMTD = 31.63 K, Effectiveness = 0.25, Correction factor F = 0.91 (per TEMA 10th Ed. | ASME Sec. VIII Div.1 | Kern Process Heat Transfer | VDI Heat Atlas).
How it works
Computed from your inputs per TEMA 10th Ed. | ASME Sec. VIII Div.1 | Kern Process Heat Transfer | VDI Heat Atlas.
Worked example (Mechanical & Machine Design)
Inputs: a 500 kW counterflow duty cooling water 90→60 °C against 30→50 °C water.
| Result | Value |
|---|---|
| Corrected LMTD | 31.63 K |
| Effectiveness | 0.25 |
| Correction factor F | 0.91 |
Computed live by WorkHive's calculation engine; standard: TEMA 10th Ed. | ASME Sec. VIII Div.1 | Kern Process Heat Transfer | VDI Heat Atlas.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses a 500 kW counterflow duty cooling water 90→60 °C against 30→50 °C water.
- The calculator returns Corrected LMTD, Effectiveness, Correction factor F, computed per TEMA 10th Ed. | ASME BPVC Sec.VIII.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a heat exchanger LMTD calculator?
The Heat Exchanger LMTD Calculator is a free online tool that computes the corrected LMTD, effectiveness, and NTU for a shell-and-tube exchanger duty. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following TEMA 10th Ed. | ASME BPVC Sec.VIII. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Heat Exchanger LMTD Calculator in WorkHive: free, no sign-up needed for the calculators.