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Everything about Heat engine

System that converts heat or thermal energy to mechanical work

A heat engine is a system that transfers thermal energy to do mechanical or electrical work. While originally conceived in the context of mechanical energy, the concept of the heat engine has been applied to various other kinds of energy, particularly electrical, since at least the late 19th century. The heat engine does this by bringing a working substance from a higher state temperature to a lower state temperature. A heat source supplies thermal energy that brings the working substance to the higher temperature state. The working substance does work in the working body of the engine while transferring heat to the colder sink until it reaches a lower temperature state. During this process some of the thermal energy is converted into work by exploiting the properties of the working substance. The working substance can be any system with a non-zero heat capacity, but it usually is a gas or liquid. During this process, some heat is normally lost to the surroundings and is not converted to work. Also, in a mechanical engine, some energy is unusable because of friction and drag. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Heat engineA 5-minute orientation
  2. Skim a recent paper: Spectrally engineered textile for radiative cooling against urban heat islandsInfluential work since 2022
  3. Pick up a classic book: Advances in heat transferThe most-reprinted book on the subject
  4. Read the landmark paper: A single-atom heat engineCited 721 times
  5. Go sideways: Thermal efficiencyA closely related topic
  6. Go sideways: Carnot cycleA closely related topic

📖 Definitions

Noun Any device which converts heat energy into mechanical work, by moving heat from a source to a sink.

🗂️ The subject at a glance

  1. Overview
  2. Examples
  3. Efficiency
  4. History
  5. Enhancements
  6. Heat engine processes

🏆 Landmark papers (most cited)

🆕 Influential since 2022

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

🔗 Related topics