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Gas Scenario Comparison

Place up to six declared gas states side by side. A scenario is never silently normalised to another pressure basis or material.

FreeNo sign-upPrivate — runs in your browser, nothing is uploaded

Compare declared scenarios side by side. Each card preserves its own material, model, temperature and absolute-pressure basis; this loads CoolProp 8.0.0 only when you run it.

Scenario 1 (baseline)

Scenario 2

Save only the declared scenarios in this browser. Results are never restored as current calculations.

Real-gas pressure sweep

A bounded local pressure or pressure–temperature grid. Only the pinned material/model capability matrix is admitted; each point remains independent and unavailable states are exported as issues, never interpolated.

Enter 2–50 pressure points and 1–20 temperature points (500 total maximum), then run the local sweep.

Quick answer

Comparisons are only meaningful when every scenario preserves its material, model and pressure basis. This workspace keeps those labels on each row.

Formula & method

scenarioᵢ = {material, model, T, P, outputs}
  • basis — declared physical interpretation and units

All calculations retain their declared conditions and do not invent missing physical context.

Examples

Example 1: Declared workflow
Input
Compare nitrogen HEOS and PR at the same 298.15 K, 101,325 Pa(a) state.
Result
A labeled browser-local result or an explicit unavailable state
Why
The result keeps the required material, state and model context visible.
Example 2: Missing input
Input
A required material, basis or state is absent
Result
Needs-input status
Why
The workspace asks for the missing dependency instead of assuming it.
Example 3: Unsupported request
Input
A request outside the admitted capability
Result
Unavailable status
Why
No ideal or zero-valued fallback is substituted.

When to use this tool

  • Reviewing up to six declared gas scenarios.
  • Comparing admitted HEOS, PR and SRK outputs.
  • Preparing a reproducible comparison for review.

Common mistakes

  • Comparing gauge and absolute pressure as though they were identical.
  • Treating model differences as measurement error.
  • Omitting the material identity from a scenario.

Assumptions

What the result takes for granted:

  • Each card retains its own context.
  • Unsupported outputs remain unavailable.
  • No scenario data is uploaded.

Limitations

Where this tool stops — and what to use instead:

  • This is not a phase-envelope or process-design comparison.
  • It does not infer missing conditions.
  • Only admitted pure-fluid models can produce properties.

Frequently asked questions

Does this send my data to a server?

No. This gas workspace processes the declared inputs in your browser.

Why can a result be unavailable?

The requested material, state, output or interpretation may need information that has not been declared or is outside the admitted capability.

Can I rely on this for safety-critical work?

No. Verify the stated basis and use applicable standards, instrument data and qualified engineering review for safety-critical or custody-transfer decisions.

Sources & references

External references open in a new tab. We are independent and not affiliated with these organizations.

  • ✓ Free to use
  • ✓ No sign-up required
  • ✓ Runs entirely in your browser — nothing is uploaded.
  • ✓ Formula and method shown above
Last updated: How we calculateReport a correctionDisclaimer

Provided “as is” for general information only — results may be inaccurate, so verify before you rely on them. No warranty; use at your own risk.

Built and reviewed by HIFreeTools against the formula shown above and any authoritative references cited on this page. See our methodology and editorial standards.

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