Environmentally friendly diesel engines with improved cost efficiency.
The introduction of environmental taxes tied to NOx emission levels for both ships and power plants means that if your power equipment is not meeting emission restrictions a low NOx conversion could be a profitable option.
Our Low NOx combustion process not only reduces the NOx level without affecting thermal efficiency, it also lowers the specific fuel oil consumption (SFOC), which saves costs during operation.
Prolonged engine lifetime and optimized performance
The Wärtsilä Low NOx diesel cycle upgrade combines various engine modifications designed to obtain low NOx values. The purpose of the modifications is to find the ideal combination of compression ratio, injection timing and injection rate.
The conversion prolongs the engine lifetime and optimizes the performance. At the same time emissions are reduced.
A low NOx conversion brings several benefits:
- Increased lifetime of cylinder liners, pistons and piston rings
- Low and stable lubricating oil consumption
- Reduced specific fuel oil consumption (SFOC)
- Easy to retrofit, assemble, and replace
- Short payback time.
Primary and secondary methods for NOx reduction
A primary NOx reduction method means conversions or modifications that are made directly to the diesel engine. Our low NOx conversion packages range from engine modifications and tuning up to and including WETPAC solutions. WETPAC solutions aim to inject a certain quantity of water in the process (in air, in fuel or in the combustion chamber).
Secondary methods for reducing NOx level is basically the use of a Selective Catalytic Reduction (SCR) system that can be installed on any engine, boiler or turbine make. Wärtsilä has developed several SCR solutions for specific plant or marine installations. For instance the new combined silencer and SCR unit developed by Wärtsilä is an ideal package for retrofitting projects. We are also optimising the engine settings for the lowest fuel consumption. Contact us at NOx@wartsila.com to know more about what we can do for your NOx emissions.
