NOx reduction for Yachting

The type of catalyst applied depends on the required NOx reduction, available space in the engine room, fuel type and engine exhaust characteristics. During the design process an optimum match is made between engine and catalyst type and required volume. This enables our engineer to design a compact as possible solution while taking into account the design constraints regarding available back pressure, fuel type and design life time.
 

An SCR system is complex to control in all circumstances.  The right amount of urea has to be injected to guarantee the correct emission reduction while preventing any ammonia slip from urea over-dosing. Dosing parameters are therefore adjusted for each specific engine. The system control and monitoring are performed by a state-of-the-art PLC-based closed-loop control system with advanced NOx Control Diagnostics (NCD). This means that the system is tamper-proof, meeting the requirements of the applicable legislation. Xeamos control systems are class-approved and ensure a reliable and safe operation. The controller allows for easy communication or integration with the ship’s AMS through a MOD bus protocol or analogue I/O. Xeamos systems offer remote monitoring to provide support to chief engineers when required. All system values and signals as well as events, warnings and alarms are recorded and stored in a non-erasable log file. All logged data can be easily uploaded through a remote connection for further analysis and reporting by Xeamos engineers.

The engine rooms in most ships have limited space for an exhaust system, making the need to integrate emission reduction and silencers inevitable. Using our knowledge of acoustics, we offer solutions to integrate DPF, SCR and silencers according to your requirements. The sound attenuation is tuned to the engine characteristics to give an optimum reduction of the ignition frequencies and its harmonics, suppressing that annoying exhaust hum.