Waste heat occurs especially in thermal power stations, and many modern stations use efficiency measures that make use of this thermal energy as heat or electric power and thus increase a power station's efficiency rate.
Waste heat, sometimes called secondary heat or low-grade heat, refers to heat produced by machines, electrical equipment and industrial processes for which no useful application is found. Energy is often produced by a heat engine, running on a source of high-temperature heat. A heat engine can never have perfect efficiency, according to the second law of thermodynamics; waste heat is regarded as a waste by-product of this process. When produced by humans, or by human activities, it is a component of anthropogenic heat, which additionally includes unintentional heat leakage, such as from space heating. Waste heat is thought by some to contribute to the urban heat island effect. The biggest point sources of waste heat originate from machines such as electrical generators or industrial processes, such as steel or glass production. The burning of transport fuels is a major contribution to waste heat.
Please enter a search term or choose a letter to navigate the glossary and to find definitions. This glossary aims to facilitate collaboration on the development of ambitious energy efficiency measures by clarifying definitions and highlighting common terminology. Definitions have been collected from trusted sources. It intended to expand this glossary in the future to include a wiki ensuring a truly collaborative process. If you contribute to this glossary please contact use at: firstname.lastname@example.org
The relation browser enables the user to see the relations between terms.
C = Has Concept Scheme. Points to a concept scheme in the reegle glossary. Concept schemes provide the main categories of the reegleglossary.
T = Has Top Concept. Points to a top concept in the reegleglossary. Top Concepts are the top level concepts in a concept scheme.
N = Has Narrower. Points to a narrower concept of the selected concept