WASTE-HEAT RECOVERY from Power Plants for District Heating

摘要

In 2017, the China Development and Reform Commission issued the Northern China Winter Clean Heating Plan. It mandated that, by the end of 2021, clean combustion of coal in thermal power plants would be used to provide 8 billion square meters of heating area. Estimates say this will account for nearly 40 percent of the total clean-heating area in northern China in 2021. The plan calls for an increase in the amount of heat supplies from coal-fired thermal power plants. This is achieved by recovering low temperature waste heat from the cooling water of the power plant steam condenser, which is typically cooled by cooling towers. Other clean-heating measures—clean combustion of coal in boilers, natural gas-based heating, electrical heating and heat pumps, renewable energy heating with biofuels, and geothermal and industrial waste-heat recovery—also have been addressed with specific targets.