Major Repairs of Gas Turbine Model DU80L

Product Introduction:

n turbines, important issues such as surge, stall, hot spot, creep and mis fire occur, and ignoring them will cause serious damage to the unit.

Stall or separation phenomenon: Whenever the speed of the fluid passing through the compressor vanes is such that the fluid is separated from the back of the vane, eddy currents are created behind the vane, and as a result, the compressor cannot create the necessary pressure at the vane outlet, this phenomenon is called STALL (separation).

Surge phenomenon: Any factor that causes the compressor to not be able to produce the previous necessary pressure (pressure at the inlet of the vane) and as a result, the pressure at the outlet of the compressor is more than the original pressure (input) of the compressor, the output fluid tends to return to the entrance, and also the collision of high-pressure and low-pressure masses and change of flow direction, which leads to vibration and high noise, are also called surge.

Hot Spot Phenomenon: When the pressure difference between the fuel that pours through the nozzle in the combustion chamber (Pfuel Gas) and the incoming air exceeds the permissible limit, a flame is created in the end part of the combustion chamber and causes the primary blades of the turbine to burn. They are exposed to the flame and get hot and burnt. This phenomenon is called Hot Spot.

Misfire phenomenon: If in the turbine, the combustion turns into an explosion due to some reasons, a sudden increase in the pressure in the combustion chamber will be caused and the air flow will return to the axial compressor, which results in the surge of the axial compressor. Among the causes of MIS FIRE is the entry of excessive fuel into the combustion reservoir during start-up or a sudden increase in the ratio of fuel and air during operation.

Technical Specifications:

* Output power: 25.6 MW

* Efficiency: 35.6 %

* Output gas flow rate: 87Kg/s

* Output temperature: 480oC