heat-engine

A heat-engine converts thermal energy into mechanical work.

Definition

Noun: A heat-engine is a device or system that converts thermal energy (heat) into mechanical work. It operates by taking heat from a high-temperature source, converting some of it into useful work, and rejecting the remaining heat to a low-temperature sink (often the environment).

Usage Examples

• (A device that uses heat to produce motion.)
• (Engines that burn fuel to produce mechanical power.)
• (The ratio of useful work output to heat input.)

Advanced Usage

• "Carnot heat-engine": An idealized heat-engine that operates on the Carnot cycle, representing the maximum possible efficiency for any heat-engine.

  • The Carnot heat-engine is a theoretical model used to study thermodynamic limits. (It sets the standard for real engine performance.)

• "to run a heat-engine": to operate a device that converts heat into work.

  • The factory runs a heat-engine to generate electricity from waste heat. (They use a thermal machine for power.)

Variants and Related Words

• Heat-engine cycle (n): the sequence of thermodynamic processes a heat-engine undergoes (e.g., Otto cycle, Rankine cycle).

  • The Rankine cycle is the heat-engine cycle used in most steam power plants. (The specific process pattern for energy conversion.)

• Heat-engine efficiency (n): the ratio of work output to heat input, often expressed as a percentage.

  • Improving heat-engine efficiency reduces fuel consumption. (Better performance from the same energy input.)

Synonyms

• Thermal engine: a synonym, though "thermal engine" is less common and often used interchangeably.
• Prime mover: a broader term for any machine that converts energy into mechanical work (includes heat-engines).

Related Idioms

Related Concepts (for context)

• Heat source: the high-temperature reservoir providing energy to the heat-engine (e.g., burning fuel, nuclear reactor).
• Heat sink: the low-temperature reservoir receiving waste heat (e.g., cooling water, atmosphere).