Triveni Turbines Configuration

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  • Straight Backpressure

    Straight backpressureThis is the most widely used back-pressure type turbine. Its aim is to expand the available steam through the turbine stages.

    The exhaust steam is connected to the process header.

  • Controlled Extraction Backpressure

    Controlled extraction backpressureA controlled extraction at various loading conditions of the turbine based on seasonal variations.

    In a controlled extraction type, a control valve integrated with the steam path is provided at a predetermined stage and the steam is allowed to escape the turbine at desired constant pressure based on the process requirement. There are basically two types control valves a) A Grid Valve, b) Bypass Valve, which control the flow of steam at preset pressure accommodating the seasonal variation of turbine load. The control system works on a closed loop feedback mechanism. The pressure at the user end is measured and a feed back is provided to the control system. Based on this error signal the feedback control system actuates a control valve designed to vary the area of the valve aperture and thereby regulate the pressure. This setup is applied for processes; where the steam pressure is a critical parameter. In some cases a nozzle/port is provided at a predetermined stage and an un-controlled high-pressure steam flow/bleed is drawn out of the turbine. This tap is provided before the controlled extraction in the steam path of turbine. Its utility is found mainly in LP heating requirements like de-aerator, LP/HP Heaters or some processes

  • Uncontrolled Extraction Backpressure

    uncontrolled extraction backpressureIn an un-controlled extraction type, a tap is provided at a predetermined stage for drawing out the steam for heating solutions.

    The un-controlled extraction steam is used for process steam applications (with smaller quantity of steam flow and set temperature requirements) and LP heating application like de-aerator for heating solutions.

    These turbines can also be deployed in District heating application.

  • Straight Condensing Type

    straight condensingIn a Straight Condensing type steam turbine, the heat energy of steam is completely converted into mechanical energy (torque).

    • The mechanical energy is utilized to generate power.
    • The straight condensing type finds application in industries where power generation is prime objective e.g. captive power plant/ IPP.
    • Straight condensing type is very common in places where
      • Bleed is used for de-aerator
      • Incidental power generation
  • Controlled Extraction Condensing

    controlled extraction condensingOne of the most versatile setup in terms of operation and intricate in terms of design. It provides a constant pressure steam through a controlled extraction at various loading conditions of the turbine based on seasonal variations.

    A control valve integrated with the steam path is provided at a predetermined stage. A partial steam flow is drawn out of the turbine at a constant pressure as per the process requirement. There are basically two types control valves a) Diaphragm, b) Passing/Throttle Valve, that controls the flow of steam at a preset pressure accommodating the seasonal variation of turbine load.

    The control system works on a closed loop feedback mechanism. The pressure at the user end is measured and a feed back is provided to the control system. Based on this error signal the feedback control system actuates a control valve designed to vary the area of the valve aperture and thereby regulate the pressure. This setup is applied for processes; where the steam pressure is a critical parameter.

    In some cases a nozzle/port is provided at a predetermined stage and an un-controlled high-pressure steam flow/bleed is drawn out of the turbine. This tap is provided before the controlled extraction in the steam path of turbine. Its utility is found mainly in LP heating requirements like de-aerator and processes.

    Controlled/ Un-controlled condensing type turbines are used in Co-generation application and offer maximum cycle efficiency to the user.

  • Uncontrolled Extraction Condensing

    uncontrolled extraction condensingIn an un-controlled extraction type, a tap is provided at a predetermined stage and a partial stream of steam is drawn out of the turbine.

    The un-controlled extraction of steam is deployed for process applications (with smaller quantity of steam flow and set temperature requirements) and Low Pressure heating application like de-aerator for heating solutions.

    This turbine setup is usually deployed in Independent Power Plants, Captive Power Plants and Co-generation plants.

 

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