Gas Turbine Emissions Testing
 
CleanAir’s turbine experience includes:

• Natural gas-fired units
• Fuel oil-fired units
• Simple Cycle Power Plants
• Heat Recovery Steam Generators
• Peakers
• Dry-low NOx control
• Selective Catalytic Reduction (SCR) control
• Wet injection NOx control

CleanAir performs a variety of different types of test projects for turbines:
 
Tuning
During tuning, CleanAir measures NOx, O2 and sometimes CO concentrations from the gas turbine exhaust.  Normally, USEPA Method 20 procedures are followed, which requires that the measurements be made at eight points within the duct that have the lowest O2 concentrations.  The measurements are made while the tuning engineers adjust the operating parameters of the turbine (e.g., air flows, water injection rates, fuel flow, etc.) to achieve the optimal performance of the unit.
 
Performance Testing
Turbine performance testing is done to establish compliance with emissions limits set by Federal or State regulations, or guaranteed by the equipment manufacturer.  The testing is normally done at multiple operating loads.  Examples of the testing requirements include those  specified under:

• 40 CFR Part 60 Subpart GG (NSPS)
• 40 CFR Part 75.19 (fuel and unit specific NOx emission rates)
• 40 CFR Part 75 Appendix E (NOx emissions from peaking units)
• Manufacturer's guaranteed limits
• State required emission compliance testing for criteria and hazardous air pollutants, including NOx, particulate matter, opacity, PM10, PM2.5, CO, VOCs, formaldehyde and ammonia.

Relative Accuracy Test Audits
RATA testing on turbine CEMS or PEMS may include any of the following analyzers:

• NOx
• CO
• O2/CO2
• SO2
• Exhaust gas flow rate
• Fuel flow rate