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Waste heat recovery is a process used in thermal power plants to improve efficiency by capturing and utilizing excess heat that would otherwise be lost. This technology helps reduce fuel consumption and emissions, making power generation more sustainable. Several plants worldwide have successfully implemented waste heat recovery systems, demonstrating their practical benefits.
Examples in China
China has integrated waste heat recovery in many of its coal-fired power plants. One notable example is the Guodian Shandong Power Plant, which uses heat recovery steam generators (HRSGs) to convert waste heat into additional electricity. This process increases overall plant efficiency and reduces greenhouse gas emissions.
European Implementations
In Europe, the Drax Power Station in the United Kingdom has adopted waste heat recovery technology. The plant captures excess heat from its biomass boilers and uses it for district heating and other industrial processes. This approach maximizes energy use and minimizes waste.
Examples in India
India’s NTPC Vindhyachal plant employs waste heat recovery to improve efficiency. The plant uses heat exchangers to recover heat from flue gases, which is then used to generate additional steam for power production. This system helps meet the country’s growing energy demands sustainably.
Common Technologies Used
- Heat Recovery Steam Generators (HRSGs)
- Regenerative Air Preheaters
- Economizers
- Organic Rankine Cycle (ORC) systems