Heat recovery steam generator performance behind a gas turbine, with or without duct firing: steam at one or two pressure levels, stack temperature, heat balance, pinch and approach checks and the value of lost steam.
USD 49 one-time purchase
Need it once? Use it online: check your data free, unlock results from USD 9 for 3 runs.
What it does
Gas turbine exhaust
From a built-in gas library or your own flue gas analysis; optional supplementary firing.
One or two pressure levels
HP steam with optional superheat and LP saturated steam, with feedwater, blowdown, pinch and approach for each level.
Heat balance
Duty of every section, stack temperature, effectiveness and closure shown as a percentage.
Pinch and approach checks
Each section checked against a typical minimum, with a warning when it falls short.
Design versus measured
Guarantee against test values, and the yearly value of the steam you are losing.
What-if
Gain from a lower stack or feedwater temperature, with an acid dew-point warning.
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.
Preview the workbook
An illustration of the sheet layout of this workbook, not a screenshot of calculated results. Select the image to enlarge it. For questions before you buy, email [email protected].
Specification and checks
| 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 | 14 cases against an independent calculation with IAPWS-IF97 steam and NASA polynomial gas data: steam within 0.2 %, stack temperature within 0.1 K, gas duty within 0.15 %. |
| Free version | Try the free boiler efficiency calculator |
Online tool or Excel workbook?
| Online tool | Excel workbook (this page) | |
|---|---|---|
| What it does | The same sheet as the Excel workbook, run in your browser | Heat recovery steam generator performance behind a gas turbine, with or without duct firing: steam at one or two pressure levels, stack temperature, heat balance, pinch and approach checks and the value of lost steam. |
| Cost | Check your inputs free. Results: 3 runs for USD 9, or every online tool for USD 15 a month (USD 99 a year) | USD 49 once, yours to keep |
| Input checks and findings | Every input checked; findings with the unlocked results | Every input checked, with findings and recommendations |
| Report for your calculation file | Printable results sheet | Print-ready report with your plant, tag, document number, revision and sign-off |
| Formulas | Method described in the guide | Every formula visible in its cell |
| Save, edit and rerun your cases | Each run separately | Yes: keep and edit your own file |
| Works offline, on a plant PC | No, needs the internet | Yes: Excel 2010 or later, Windows and Mac |
Online access and the Excel workbook are separate licences: one does not include the other.
Compatibility, licence and support
| File | Excel workbook (.xlsx), no macros, version v1.0; works in Excel 2010 or later on Windows and Mac. Sheets are protected against accidental edits, with an open password so you can customise. |
| Licence | Single user. A team licence (up to 5 named users) is 3 × the shop price; site licences on request — licence terms. |
| Updates | Updates to this major version are included; download them again from the link in your receipt. |
| Support | Email [email protected] with your order number — questions on the method, your inputs or your results are welcome. |
| Refunds | If the tool does not work as described, or has an error we cannot fix, email [email protected] with your order number within 14 days of purchase and we will refund you in full. Refunds are not offered for a change of mind once a file has been downloaded. Read the full refund policy. |