Glossary · term

Coefficient of performance

Thermodynamics

Aliases
COP
Domain
Thermodynamics

Definition

For a heat pump or refrigerator, the heat moved per unit of work put in. Unlike an efficiency it can exceed 1 — a good heat pump moves four joules of heat for one of electricity.

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From the Glossary database in Notion, last edited 2026-08-17. This page is the row, rendered by the build; nothing on it is written by hand.