energy efficiency
Let an agent handle energy efficiency by system, measurement, labels, improvement and rebound, with sourced figures.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent handle energy efficiency by system, measurement, labels, improvement and rebound, with sourced figures.
The ratio of useful energy output to energy input for a device, process or system, a dimensionless quantity often expressed as a percentage; also the broader goal of using less energy to deliver the same service.
What it is for: Reducing energy use, costs and emissions.
It can be compare efficiency ratings; read energy labels; estimate savings; improve efficiency of buildings and devices.
Distinguishing features
Output over input
Dimensionless
Limited by physics
Rebound can reduce net savings
What it looks like
Ratings, labels and percentages.
How it is recognised
Energy labels with classes
Efficiency percentages or COP values
Registry alias dressed weight is unrelated
Related models
is a kind of - category
is related to - goal
is shown by - labelling
is limited by - physics
In practice
Families and kinds
device efficiency
building energy performance
industrial process efficiency
vehicle fuel efficiency
heat pump coefficient of performance
Standards and regulation
EU Energy Labelling Regulation 2017/1369
EU Energy Efficiency Directive
Energy Performance of Buildings Directive
Failure modes and hazards
Comparing different metrics
Ignoring rebound effects
Misleading efficiency claims
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Metric How measured.
Metrics differ.
Ratio
Output over input.
Ratio
Efficiency metric.
- Which efficiency metric is used for this system? definition
- What is its value? measurement
Test
Standard conditions.
Test
Test conditions.
- Under which test standard was it measured? provenance
- Does real use differ? boundary
Labels Ratings.
Labels guide choices.
Class
Energy class.
Class
Energy label.
- What energy class does the label show? provenance
- Which scale version applies? provenance
Comparison
Like for like.
Comparison
Comparison.
- Are products compared on the same metric? boundary
- What is the running cost difference? measurement
Improvement Savings.
Efficiency saves energy.
Measures
Upgrades.
Measures
Improvement measures.
- Which measures improve efficiency most here? action
- At what cost? measurement
Rebound
Offsetting.
Rebound
Rebound effect.
- Could increased use offset the savings? boundary
- How large is it likely to be? measurement
Limits Physics.
Physics sets limits.
Maximum
Theoretical limits.
Maximum
Theoretical limit.
- What is the theoretical maximum efficiency? measurement
- Which law sets it? definition
Claims
Marketing.
Claims
Efficiency claims.
- Is a claimed efficiency supported by test data? provenance
- Does it exceed physical limits? boundary
What the second pass must settle
- Should efficiency metrics be separate entries?
- How should label classes be linked?
- How should the unrelated alias be removed?