A large amount of heat arising from processes is often lost. The process might be inherent to a building, such as space heating, ventilation and so on, or could be something carried out as part of business activity, such as the use of ovens, furnaces and the like. Heat recovery can help to reduce the overall energy consumption of the process itself, or provide useful heat for other purposes.
Where can it be used?
The most cost-effective use of waste heat is usually to improve the energy efficiency of the heat generating process or the overall site.
Uses for recovered heat include:
- power generation
- pre-heating combustion air for boilers, ovens and furnaces
- pre-heating fresh air used to ventilate the building
- hot water generation, including pre-heating boiler feed water
- space heating
- other industrial process heating/pre-heating
All of these will reduce spending on either heating or can actually help generate power for you.