external-combustion engine
Noun: A type of heat engine where the fuel is burned (combustion occurs) in a separate unit or chamber outside the main part of the engine where the working fluid is heated. The resulting heat is then transferred to a working fluid (like water/steam or air) inside the engine to produce mechanical motion or power.
The term is used to classify engines based on where combustion takes place, contrasting with internal-combustion engines. * The steam locomotive is powered by an external-combustion engine. * Early industrial machinery often relied on external-combustion engines like steam engines.
- Technical Context: In engineering thermodynamics, an external-combustion engine allows for the use of a wider variety of fuels, as combustion can be more carefully controlled externally, and the working fluid remains uncontaminated by combustion byproducts.
- Historical Context: The external-combustion engine was fundamental to the Industrial Revolution, powering factories, trains, and ships before the widespread adoption of internal-combustion engines.
- Stirling engine: A specific, efficient type of external-combustion engine that uses a sealed, permanently gaseous working fluid like air or helium.
- Steam engine: The most common historical example of an external-combustion engine, where water is boiled in an external boiler to create steam that drives the engine.
- Internal-combustion engine (Antonym): An engine where fuel combustion occurs inside the engine's main cylinders (e.g., gasoline or diesel engines).
- EC engine (Abbreviation)
- There are no perfect conceptual synonyms, as it is a specific technical term. Descriptions like "engine with external combustion" or "engine where combustion occurs externally" convey the same meaning.
- External combustion: The core process defining this engine type.
- The principle of external combustion allows for smoother and quieter operation compared to some internal-combustion designs.
The term external-combustion engine has a single, specific technical meaning in engineering and mechanics. It does not have common idiomatic or figurative uses.
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a heat engine in which ignition occurs outside the chamber (cylinder or turbine) in which heat is converted to mechanical energy
