Net output, net efficiency and heat rate of a gas turbine, HRSG and steam turbine plant: design, actual and proposed cases, ISO correction, loss breakdown and ambient what-if.
USD 49 one-time purchase
Download the sample report (PDF)
Need it once? Use it online: check your data free, unlock results from USD 9 for 3 runs.
What it does
Net output and heat rate
Gross and net output, net efficiency and heat rate on an LHV or HHV basis, with the steam cycle share and the auxiliary load.
Design, actual and proposed
Three cases side by side with the differences: where the plant stands against its guarantee and what a planned change is worth.
Corrected to ISO conditions
Output, heat rate and efficiency at 15 °C, 101.325 kPa and 60 % RH, with generic coefficients or your own.
Steam turbine from the HRSG data
Measured output, or an estimate from HRSG steam flow, pressure and temperature, checked against the measurement.
Loss breakdown
Where the fuel heat goes: net output, auxiliaries, generators, stack, condenser and other, with an HRSG heat balance check.
Ambient what-if
Net output, heat rate and efficiency at other ambient temperatures, with ranked findings and three charts.
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
Real pages from the workbook with its built-in example loaded (example data, not a measured plant). Choose a page below, or select the large image to enlarge it.
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 | All 32 combinations of the five method selectors, 18 unit-system variants and 69 edge cases against an independent Python model (IAPWS-IF97 steam, species polynomials for the exhaust gas): net output, heat rate, efficiencies and corrected values within 0.005 %. |
| Free version | Try the free steam tables 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 | Net output, net efficiency and heat rate of a gas turbine, HRSG and steam turbine plant: design, actual and proposed cases, ISO correction, loss breakdown and ambient what-if. |
| 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. |