Exhaust gas emission measurements
Methane slip measurement is the latest service addition to our DNV’s Envilab state-of-the-art exhaust gas emission measurement portfolio. Our aim is to support engine makers and ship owners directly on site, whenever and wherever needed.
Reflecting the ongoing global efforts towards decarbonization and a cleaner environment, emission regulations for marine engines are becoming increasingly strict.
Direct emission monitoring as well as a vessel’s thoroughly documented energy efficiency, can be key to environmental compliance and to a successful decarbonization journey.
With more than 25 years of experience in exhaust gas emission measurement and speed trial performance, DNV’s ISO 17025 accredited testing laboratory Envilab is the ideal partner for investigating your current emission status and more. Our state-of-the-art mobile measurement equipment as well as comprehensive knowledge in exhaust gas emissions assures reliable measurement results from an expert team which is accepted by the authorities.
Our Envilab portfolio covers:
- Test-bed and on-board measurements according to the IMO MARPOL NOx Technical Code 2008, ISO 8178 - Emission measurements on combustion engines, RVIR Guideline 16, World Heritage Fjords
- Gaseous components, incl. NOx, CO, CO2, O2 , HC, CH4 (Methane Slip) and SO2
- Pollutant particle emissions such as particulate matter (PM), opacity or smoke number (FSN)
- Speed/power trials - performance and assessment (outside of accreditation scope)
Methane slip measurement
Methane slip, as based on standard methane slip factors, can account for up to 24% of GHG emissions from an LNG-fuelled vessel. As an alternative to using standard factors for the reporting of CO2 equivalents, direct methane emissions monitoring has the potential to positively impact a ship’s reported carbon footprint.
DNV Envilab offers worldwide support in measuring real CH4 slip emissions on board or on test beds according to the new MEPC.402(83) – Guidelines for test-bed and onboard measurements of methane (CH4) and/or nitrous oxide (N2O) emissions from marine diesel engines.
NOx emission measurement
Controlling emissions of nitrogen oxides from marine diesel engines continues to remain a vital part of the IMO MARPOL strategy for the prevention of air pollution from ships. In addition, taking the Norwegian World Heritage Fjords as an example, some local authorities have already started setting their own often stricter emission regulations, thus challenging the shipping industry.
DNV’s Envilab is accredited to perform NOx emission measurements according to the NOx Technical Code and delivers professional test reports which can be used for IMO engine emission certification including SCR, as well as to document compliance with the World Heritage Fjords requirements.
Speed trials
The efficiency of a ship design is ruled by the speed/power curve which allows to determine the ship speed for a specific propulsion power. Energy saving devices, e.g. fins or ducts, or propeller redesigns can improve the speed/power curve. Innovative energy efficiency technology, e.g. air lubrication or wind assisted propulsion, offers further potential for improvement of the ship efficiency.
Design indices as defined by IMO MARPOL, namely EEDI and EEXI, apply the ship speed for a defined propulsion power.
DNV's Envilab performs speed/power trials according to ISO regulations and ITTC recommendations and evaluates the measured values with in-house software including all recent guidelines and also former standards. This allows for independent assessment of the efficiency of ship designs and/or energy saving technologies, which is essential for the market acceptance of innovative solutions.
Why choosing DNV’s Envilab?
- Worldwide availability, with minimum disruption to your work processes, thanks to the use of mobile equipment
- Measurements comply with the latest regulations to ensure acceptance by all authorities
- Expert guidance throughout the process
