At the heart of the data center's backup power system，Generator sets play a vital role in keeping data centers running smoothly。But，When the fuel is burned，Whether it's diesel、Hydrogenated vegetable oil（HVO）Or other fuels，Will be producedNOx。
Data centers in cold regions for temperature controlCooling and heating system，Also produced during the combustion of fuelNOxDischarge。At present，The industry is accelerating its action.，Reduce critical aspects of data center operationsNOxDischarge。
In order to proactively reduce the carbon andNOxDischarge，Improve environmental sustainability in the data center，Emissions regulations for data centers are even stricter than in other industries.，These regulations may vary by location.。Some areas have more regulations on backup Generator emissions than the EPA.（EPA）And the European Union are stricter.。
In North America
EPA（EPA）There are special fixed engine codes.，Used to determine what the Generator set must comply withNOxEmission regulations。For example，Spare or“Emergency”The generator set receivesTier 2 Emission Requirements Constraints。The backup generator operates only during power failure and periodic field maintenance testing。For those classified as primaryNOxLarge data centers for emission sources，Regulators will put forward stricter monitoring requirements.，For example, willNOxThe emission cap is set at 100 tons per year.。
On the other hand，Constant-load and stand-by generator sets must meet the more stringentTier 4 Emission requirements。These generator sets operate in place of or in addition to the power supplied by the power supplier。Tier 4 Certified products also require that the generator set be shut down when an aftertreatment system problem is detected。
Outside of North America
Global regulations vary。Although the requirements of most regions are similar to those ofTier 2 andTier 4 Similar，ButNOxCalculations may vary。
Cummins' engine design offers significant advantages in terms of power density and fuel economy，Comply with strict EPA Tier 2 Requirements。And，Cummins is developing lowerNOxEmissions solutions，Meet increasingly stringent emission regulations。
Selective catalytic reduction（SCR）The system mayNOx90% reduction in emissions%Or above。Thus, the integrated standby power system can meet the requirement ofTier The criterion of 4。Adding an amino reducing agent to the exhaust gas stream，Reacting through a catalyst toNOxInto two harmless substances, nitrogen and water.，And then released into the atmosphere.。
At present，Fuel infrastructure is still dominated by diesel.，Natural gas has not been widely adopted in data centers。However, due to the limitation of the power grid and the reduction ofNOxRapid increase in demand，Data centers are increasingly moving toward cleaner fuels。
HVOIt is a promising substitute for carbon-reducing diesel.，But it will still be produced during combustion.NOx。More and more data centers are exploring batteries、New technologies such as fuel cells and hydrogen internal combustion engines。These technologies are designed to reduce overall data center emissions，Provide reliability performance comparable to Diesel Generator set。At the same time，The data center is also exploring the comprehensive utilization of solar energy.、Solutions for new energy sources such as wind energy。
ReduceNOxEmissions are key to sustainable data center operation。LowNOxEngine technology for emissions、Exhaust aftertreatment options and cleaner fuels can help data centers further reduceNOxDischarge and protect the environment。
At Cummins，We are committed to helping data centers achieve their sustainability goals。Research and development of advanced generator sets and new energy power，Better performance of the backup power system will be ensured，Helps the data center operate smoothly。
