EngiMetric

Stage 11 of 15 / Calculation

Close the plant energy performance

Add stack, BOP, compression, conditioning and cooling into one plant kW and one system kWh/kg.

  • Advanced
  • 15 stages
  • 14 min
  • Process and energy systems
In development Green Hydrogen Plant
Draft development workbench (noindex). These stages are exercisable on a direct development route for learning and review. The journey remains a draft: not published, excluded from search/sitemap by existing protections, and not independently engineering-approved. Quantitative outputs are screening/educational where implemented and must not be treated as certified design, OEM guarantees, project approval, or bankable results.
Professional review required.Engines and workbench are implemented for draft development use. Defaults, sources, heating-value basis and engineering assumptions still require independent review. The journey must not be published or sitemap-indexed from this phase. Current verification state: Needs engineering review.

After this stage you can

Learning objectives
  • Report stack, BOP, compression, conditioning, cooling and plant totals.
  • State system kWh/kg and LHV/HHV efficiency with the heating-value basis.
  • Confirm annual stack plus annual auxiliary equals annual plant energy.

The engineering

Plant power is stack power plus every modelled auxiliary. System specific electricity is plant kW divided by delivered kg/h. Stack specific electricity remains the owned stack figure so you can see the auxiliary adder.

LHV and HHV efficiencies use screening heating values and the full plant electrical denominator. They are not guarantees. Annual energy applies the same operating factor to stack and auxiliaries so the annual balance closes.

If system kWh/kg looks “good”, check whether compression and cooling were actually included. This journey refuses to hide them.

EngiMetric / green hydrogen educational workbench

Green Hydrogen Plant — Educational Screening Workbench

Loading the hydrogen project state...

Draft development workbench (noindex). Inputs are saved in this browser only. Calculations shown are screening/educational outputs from the existing model where implemented; missing or unsupported quantitative areas remain explicit. Completing stages records self-declared learning progress only — it is not quantitative engineering capability, not an OEM guarantee, and not industrial/project approval.

Stage

Loading...

Inputs

Saved in this browser

Edit the screening inputs for this stage, then calculate. Values you enter are marked as user-entered in the local project state; defaults remain illustrative until replaced.

Screening results

Educational model output

Results come from the existing hydrogen screening model. Unsupported quantitative areas, missing evidence, and review requirements remain explicit; outputs are not certified design or approval decisions.

Process & balance context

Textual screening views

This educational workbench presents stage-specific calculated outputs and limitations. Detailed interactive diagrams are not required for journey completion; use the stage results and assumptions panels to review boundaries, flows, energy, storage, and economics context.

Assumptions, limitations & review

From journey definition

Your deliverable for this stage

Capstone evidence

A closed plant energy statement with distinguishable power terms.

Stage assumptions, limits and sources

Provenance

Assumptions

  • Heating values are screening constants, not a measured gas analysis.
  • Every load uses the same operating hours, days and availability.

Constraints

  • Stack + auxiliary = plant, on both kW and annual kWh.

Limitations

  • No part-load curve, standby power or start-stop energy.
  • No temperature-dependent enthalpy.

Review status

  • Needs engineering review
  • Professional review is required before publication or use as a design basis.

Stage progress is stored in this browser only. The explanation and every limit on this page remain readable with JavaScript disabled; the calculators need it to run.

Stage kind: Calculation / Journey: green-hydrogen / Stage: energy-performance