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There are many examples of how waste heat is recovered to ensure energy efficiency. For example, domestic condensing boilers recover low-grade heat from the combustion flue gases to pre-heat the returning central heating water optimise their energy efficiency for space heating applications.
Author credit: Stephen B. Harrison, Managing Director, sbh4 consulting Many industrial processes such as steel production, cement making and power generation result in ‘waste heat’. This is energy that is left over from the process but is available at lower temperature than can usefully be utilised. There are many examples of how waste heat is recovered to ensure energy efficiency. For example, domestic condensing boilers recover low grade heat from the combustion flue gases to pre-heat the returning central heating water optimise their energy efficiency for space heating applications. An...