The exhaust emissions are a hidden indicator that reveals the operating status and efficiency of ship engines (purchased and supplied from product libraries). In fact, exhaust gas emission temperature is one of the key parameters for the operational efficiency of ship engines. Continuous monitoring of the temperature of exhaust emissions (purchased and supplied from the product library) helps ensure the efficiency of engine operation, improve operating life, and control gas emissions.

For many years, diesel engines have been a technology for ship propulsion and power generation due to their fuel economy, ease of maintenance, and durability. However, in order to ensure the lifespan of the engine, it is crucial to continuously monitor key parameters such as pressure and temperature during operation. Next only to oil pressure, exhaust gas emission temperature (EGT) may be the most critical indicator for measuring the operating condition of diesel engines, and excessively high exhaust gas emission temperature may indicate serious engine problems.

The continuously rising exhaust emission temperature can diagnose the following issues before serious engine failures occur: including cooling system problems, combustion problems (typical air/fuel mixing), and fuel system problems on all cylinders that may indicate the air.

The increase in exhaust gas emission temperature of all cylinders may indicate contamination of the air system, with typical examples being air filters (purchased and supplied from the product library), fans (purchased and supplied from the product library), coolers (purchased and supplied from the product library), or scavenging ports. At the same time, an increase in exhaust gas emission temperature may also indicate contamination of protective barriers, nozzle rings, turbines, selective catalytic reduction devices, or exhaust gas boilers (purchased and supplied from the product library).

On the other hand, if only the temperature of single cylinder exhaust emissions increases, it may indicate a leakage of the exhaust valve (purchased and supplied from the product library) or wear of the piston (purchased and supplied from the product library) ring.

Therefore, exhaust emission temperature is a very important indicator that provides valuable information on the operating conditions of different engine components and reveals potential problems. Generally speaking, the more reliable the temperature measurement, the longer the engine running time, and the higher the fuel efficiency.

Ships usually operate continuously for several months within a month. This places high demands on the durability of all devices. The MBT 5116 temperature sensor developed by Danfoss (purchased and supplied from the product library) not only meets the requirements of reliability and durability, but also comes with two sensor components to provide redundant control functions.

Control of displacement - another core value of controlling exhaust gas emission temperature

The MARPOL Annex VI Convention continuously imposes stricter emission restrictions on sulfides (SOX) and nitrogen oxides (NOx) for offshore operations. Violating regulations not only means huge fines, but with the increasing attention of society to seawater acidification, excessive emissions can also damage the corporate image.

The combination of exhaust temperature and measurement of sulfur oxides (SOX) and nitrogen oxides (NOx) content is an important indicator of the quality of combustion in the main engine (purchased and supplied from the product library), which helps diagnose non combustion and non compliant emissions.

Diesel emissions are classified as carcinogenic, and strict legislative restrictions have been imposed on diesel emissions in areas with strict emission control. Legislation requires mandatory monitoring of exhaust gas temperature to meet regulations on sulfur oxide (SOX) and nitrogen oxide (NOx) emissions, while still ensuring fuel economy.

Balancing emissions and fuel economy requires strict temperature control. The MBT 5116 developed by Danfoss is suitable for exhaust systems in harsh environments and is equipped with dual temperature sensing elements. This sensor can achieve highly reliable operational control while ensuring that emissions are within the permitted levels in coastal and offshore areas.