A multihole sampling probe is inserted into the exhaust manifold to measure gas concentration.
The exhaust gas sample is extracted via a heated filter and a heated sampling line into the conditioning unit where the humidity is removed. From there the concentrations of the individual exhaust components; Nox, SOx, CO, CO2 and O2 are measured by the portable analyzer HORIBA PG-250.
The analyzer is calibrated before and after the measurements with zero and span calibration gases corresponding to the measured ranges.
Typically the emissions are measured on 25%, 50%, 75% and 100% engine load steps.
A detailed report with the measuring results and description of the measuring procedure is issued after each measurement.
• Verification of compliance with applicable emission legislations after modifications, upgrades and legislation changes.
• Emission measurements also support engine condition and performance checks.
Measurement of Emission according to IMO Technical NOx code 2008 ANNEX VI Simplified on-board verification.
Measuring equipment and measuring procedures fulfil the IMO and Class Requirements for amendments of the technical file in case of Tier I / II upgrades, changes of engine tuning or changes of IMO controlled components.
Emission concentration measuring ranges:
- Nitrogen Oxides (NOx) up to 2’500 ppm
- Sulphur Oxides (SOx) up to 3’000 ppm
- Carbon Dioxide (CO2) up to 20% vol
- Carbon Monoxide (CO) up to 5’000 ppm
- Oxygen (O2) up to 25% vol
In case a continuous emission monitoring is required, Wärtsilä can offer the Continuous Emission Monitoring System(CEMS) with full reporting capabilities in accordance with customer/authority requirements. Alternatively, a simpler analyzer/feedback system (e.g. after treatment systems) can be offered.