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Why The Exhaust Temperature is Too High of Diesel Genset Turbine

Apr. 28, 2022

When the exhaust temperature of the supercharger turbine is too high during the load operation of the Cummins diesel generator set, users should pay close attention to the cause of the failure. Because once the exhaust gas temperature of the Cummins diesel generator set is too high, the heat load of the components of the unit will be too heavy, which will have an adverse effect on the Cummins diesel generator set.


Cummins 800 kw generator


Since the supercharged Cummins diesel generator set uses the exhaust gas discharged from the exhaust pipe to drive the turbine of the turbocharger to run at a high speed, the working temperature of the turbine shell will be higher than the exhaust temperature (turbine inlet temperature) of the non-supercharged Cummins diesel generator set, increasing the temperature of the turbocharger. It is normal for the turbine casing to be dark red when the Cummins diesel generator set is working. When the supercharged Cummins diesel generator set is working normally, the working temperature of the turbine of the turbocharger shall not exceed 750 degrees. If the temperature is too high, some parts of the turbine will be burned. The main reasons for the high turbine inlet temperature caused by the analysis of star power generation equipment are:


Cummins diesel generator set fuel injection pump circulating fuel supply is too large, the diesel combustion is rough and incomplete, and the exhaust temperature is high. The injection pressure of the injector is too low, the carbon deposition is serious, the nozzle hole of the injector is blocked, the plunger coupler is stuck, the fuel injection atomization is poor, the combustion is not good, and the exhaust temperature increases. The outlet valve and plunger of the fuel injection pump are seriously worn, resulting in the formation of the second injection, the diesel combustion is insufficient, and the exhaust gas temperature increases. The fuel injection advance angle is too small, and the combustion time is short, so that the diesel fuel is not completely burned, and the exhaust temperature of the generator increases. Turbine blade deformation. The exhaust back pressure is too high, the exhaust is not smooth, and the heat dissipation capacity is not strong. The boost pressure decreases, the amount of air entering the cylinder decreases, and the exhaust temperature increases.


When the temperature of the turbine casing of the Cummins generator set is too high, the speed of the Cummins generator set can be appropriately reduced, the load or shutdown can be performed to make the temperature of the turbine casing drop slowly, and rapid cooling must not be forced (such as splashing water on the turbine casing) to prevent the turbine casing from bursting.


The above is the reason why the exhaust gas temperature of Cummins generator set is too high as introduced by Starlight Power Generation Equipment. If you have any questions about this, you are welcome to visit the Starlight website. We will have professionals to explain to you. As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.

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