Draft PPS18: Renewable Energy
Annex 1 Energy from Waste (Thermal Processes) Technology: Combined Heat & Power
D17. The most efficient Energy from Waste schemes generate both electricity and heat, through Combined Heat and Power (CHP) plants. This method is particularly beneficial as most of the energy in the waste can be put to good use and the improvement in energy efficiency leads to a corresponding reduction in emissions. It is desirable for CHP and Community Heating Schemes to be situated close to local energy users in order to minimise the costs of the heat distribution system.
D18. A typical waste-fuelled combined heat and power process will involve some or all of the following:
- waste reception and storage;
- waste processing, material sorting and recovery;
- feeding waste into the combustion, pyrolysis or gasification chamber;
- the combustion, pyrolysis or gasification reactor itself;
- generation of heat and power using steam turbines, gas engines or gas turbines;
- treating the waste gases to reduce emissions;
- handling, storage and disposal of ash; and,
- handling, storage and disposal of liquid effluents such as boiler water and surface water.