ARTICLE / MAKALE Emission regulations regulated under Part 1 of the EPA if their plant capacity exceeds certain thresholds, which are identified in the Guidance Notes listed in Appendix 2. Plant is subject to EPA control according to the energy input rating of the individual items of combustion plant. A cogeneration plant that recovers heat from a prime mover is covered by requirements relating to the prime mover. The Environmental Protection Act 1990 (EPA) was introduced as the main legislation controlling atmospheric emissions and other types of pollution in the UK. This complies with EC requirements such as the Large Combustion Plant Directive. Other legislation that may apply to emissions from cogeneration installations includes the Clean Air Act 1993 and the Public Health Acts. A cogeneration plant that burns fuel in a boiler is required to comply with the standards for boiler plant, irrespective of whether the boiler also recovers prime mover heat. Consequently, the design and the heat input capacity of a CHP scheme would determine the legislative environmental requirements that must be met. Summary of emissions guidelines from Part A Guidance Notes (50 MW thermal and above) lntegrated Pollution Control (IPC) The Environment Agency regulates the release of prescribed substances to air, land and water, and processes coming under IPC are referred to as ' Part A' processes. Cogeneration is regulated for IPC in the Combustion Processes section of the Fuel and Power group of prescribed NOx Gas Fireci Oil Fireci Coal procTehseseEsA. has issued Guidance Notes for sox Gas Fireci combustion processes covering gas turbines, compression ignition engines, and boilers. These documents give guidance on Oil Fireci current and future limits of emissions concentrations, together with controls on the sulphur content of fuels and monitoring requirements. Any requirements for IPC authorisation will be determined by the EA, taking into account the need to achieve Coal Gas Turbine 5( 100 m5 gm/ Mg /JM J ) 105 mg/MJ) (140 mg/MJ fSuuel lpmh uurs Ct boen t <e n7t 0o f mg/MJ Sulphur Content of fuel must be < 1 % w/w Compression lgnition Engine 100 mg/m3 Boiler 140 mg/m3 < 25 Mwe - 200 mgım3 200 mg/m3 > 25 Mwe - 300 mg/m3 50 mg/m3 Distillate Oil - 1 1 O mg/m3 Resiciue Oil - 530 mg/m3 60 to 300 mg/m3 ciepenci an abaintegmoenntsystem ci process 5 mg/MJ 155 mg/m3 (1 % w/w sulphur) 200 to 400 mg/m3 (1 % w/w sulphur) BATNEEC for the particular process, and this can also incorporate any other statutory requirements that apply. One of the key legislative issue that affects IPC authorisations is the National Air Quality Strategy, and the need to achieve UK compliance with EU Directives on Ambient Notes 15% 02 for turbines and engines figures in (ltalics) are for existing plant. Air Quality. Local Authority Air Pollution Control (LAAPC) The second pollution control regime involves Local Authority Air Pollution Control (LAAPC), and known as 'Part B' processes. This is regulated on a local basis using Guidance notes issued by the DETR, which contain emission limit values. The BATNEEC principle does apply to LAAPC regulation, and the limits are guidance for inspectors - not mandatory limits. Operators of cogeneration plants will be Ju COGENERATION WORLD & Renewable Energy Gas Fireci Oil Fireci Coal Coal Summary of emissions limits from Part B Guidance Notes (below 50 MW thermal) Gas Turbine NOx 100 mg/MJ (105 mg/MJ) 150 mg/MJ) (250 mg/MJ) Compression lgnition Engine NOx 425 mg/m3 (635 mgım3) HFO 1185 mg/m3 (1525 mgım3) Distillate Oil 1100 mg/m3 (1525 mg/m3) Boiler NOx 140 mgım3 (200 mgım3) Gas Oil-200 mg/m3 (300 mg/m3) Resiciue Oi 1(450 mg/m3) (600 mgım3) 450 to 650 mg/m3 ci ci a e n pen ing on system ci abatement process
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