Actual U, fouling resistance and cleanliness from plant readings — with the duty lost to fouling, its yearly cost and the best cleaning interval.
USD 49
| Format | Excel workbook (.xlsx), no macros |
| Version | v1.0 |
| Works in | Excel 2010 or later, Windows and Mac |
| Units | SI, US and British, mixed freely |
| Includes | Guide tab with method and references, calculator, print-ready report |
| Checked against | Shah & Sekulić worked examples 3.6, 3.8 and 13.2; steam and propane condensing duties within 0.1 % of reference data. |
| Free version | Try the online calculator |
Single-user licence. Team and site licences: see options. Instant download after payment; you also get updates to this major version.
What it does
Performance from plant readings
Duty from the enthalpy change of each stream (boiling and condensing included), heat balance check, LMTD, F factor, actual U, fouling resistance and cleanliness.
Any arrangement
Counter-current, co-current, 1-2 TEMA E shell or several shells in series.
About 165 built-in fluids
Water and steam, refrigerants, hydrocarbons, solvents, glycols, brines, heat transfer oils, petroleum fractions and gas mixtures.
Clean re-rating
Duty and outlet temperatures if the exchanger were clean, by effectiveness-NTU — the duty you are losing now.
Cleaning economics
Cost of fouling per year, cleaning payback and the optimum cleaning interval.
History and trend
A 40-row log with a fouling trend chart; ranked findings and a print-ready report.
Built for engineers
- Visible formulas — nothing hidden, so you can check every step.
- Fully referenced — methods from the standard references, checked against their published worked examples.
- Safe to share — sheets are protected against accidental edits, with an open password so you can still customise.
- Built-in input checks — clear warnings for impossible inputs and values outside typical ranges.
For engineering estimates; verify against site data. Code-based methods are aligned with the publicly documented procedure; they are not a licensed reproduction or a certification.