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GCRIEnergy NexusEstablished
Methods and uncertainty

Methods and uncertainty

The methods Energy Nexus relies on, the assumptions they carry and the limits of what they can show.

Publisher
The Global Centre for Risk and Innovation
Field
Energy, Critical infrastructure, Climate and hazards
  1. 01Draftsources cited, labels attached
  2. 02Evidence checkevery value traced
  3. 03Independent reviewconflicts declared
  4. 04Editionpublished with its limits
  5. 05Correctiona new version, never a silent edit
01In brief

The short answer.

The Energy Nexus methods page sets out the methods the platform relies on, among them energy generation, storage and grid technology, power systems engineering, and reliability and resilience engineering, with their assumptions, validation and limits. Each analysis lists its assumptions and data, reports ranges and confidence beside central estimates, is checked against observations or other models, and states what it cannot show.

02Canvas

Draft to published version.

Canvas · draft to published versionDesign, not a record
Methods and uncertainty: from a source to a labelled evidence recordA source is registered with its licence and steward, checked for quality and coverage, labelled by evidence class, versioned and published with a passport; corrections create a new version. Design of the process, not a record of a run.

Fig.How a finding is reviewed before it is published. Design, not a record.

03Geography

Energy demand and corridors in North America.

Where demand concentrates in cities and the rail, road and port corridors that move fuel and equipment, shown for North America as an example geography for this subject.

Where demand concentrates in cities and the rail, road and port corridors that move fuel and equipment.Indicator derived from Natural Earth at map scale; a screening view, not an assessment.
GCRI · Energy Nexus · fieldDESIGN FIGURE
05Method register

Each method, its role in this field and how it is checked.

06Uncertainty

Where uncertainty in energy analysis comes from, and how it is shown.

SourceWhy it matters hereHow it is reported
Weather yearsAdequacy depends on rare multi-day weather patternsMany historical and synthetic weather years, not one typical year
Demand growthElectrification and data-centre load are uncertain in size and timingDemand scenarios with stated drivers
Fuel supplyGas and fuel availability depends on world markets and infrastructureSupply-disruption scenarios
Equipment reliabilityForced outage rates change with age, heat and maintenanceReliability ranges from operator data
Market behaviourPrices and investment respond to policy and expectationsPolicy scenarios rather than price forecasts

Adequacy results are reported as probabilistic metrics (loss-of-load expectation, expected unserved energy) with the weather and demand sets they rest on.

07Uncertainty

How uncertainty is reported.

  1. 01

    State assumptions

    Each analysis lists its assumptions and the data it depends on.

  2. 02

    Quantify where possible

    Ranges and confidence are reported alongside central estimates.

  3. 03

    Validate and compare

    Models are checked against observations and, where possible, against other models.

  4. 04

    Publish limits

    What an analysis cannot show is stated beside what it can.

08Key terms

Terms used on this page.

Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.

TermDefinition
Uncertainty quantificationCharacterising and propagating the uncertainties in a model to state confidence in its outputs.
Sensitivity analysisRepeating an analysis under different assumptions to show how much the result depends on them.
Model validationComparing model predictions with independent observations to judge fitness for a stated use.
Energy generation, storage and grid technologyEnergy generation, storage and grid technology cover the devices and systems that produce, store and deliver energy.
09Sources

Where this page's references lead.

The bodies and documents this page is read against. Status and editions change; each link goes to the issuing body.

10Questions

Questions and answers.

Are the methods open?
Method descriptions are public on the STEM Commons. Code and data follow their own licences and access terms, listed in the source register.
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