Waste heat
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Waste heat is heat that is produced by a machine, or other process that uses energy, as a byproduct of doing work. All such processes give off some waste heat as a fundamental result of the laws of thermodynamics. Waste heat has lower utility (or in thermodynamics lexicon a lower exergy or higher entropy) than the original energy source. Sources of waste heat include all manner of human activities, natural systems, and all organisms, for example, a refrigerator warms the room air, an internal combustion engine generates high-temperature exhaust gases, and electronic components get warm when in operation.
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See also
- District heating
- Waste heat recovery unit
- Heat recovery steam generator
- Pinch analysis
- Relative cost of electricity generated by different sources
- Urban heat island
- Urban metabolism
Unless indicated otherwise, the text in this article is either based on Wikipedia article "Waste heat" or another language Wikipedia page thereof used under the terms of the GNU Free Documentation License; or on research by Jahsonic and friends. See Art and Popular Culture's copyright notice.
