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2021

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07

What are the characteristics of steam turbine generator sets, and how do they differ from gas turbines?


What are the key features of a power-generation steam turbine unit? How does a power-generation steam turbine unit differ from a gas turbine? What are the applications of power-generation steam turbine units? What is the working principle of a power-generation steam turbine unit? A power-generation steam turbine unit is a device that generates electricity by utilizing the thermal energy of gas. Its main characteristics include high thermal efficiency, simple structure, stable operation, and economical performance. In the power industry, its primary application is to supply steam to large-scale power generation units.

   What are the characteristics of a power-generation steam turbine unit?

  The main characteristic of a power-generation steam turbine unit is that the turbine speed is independent of the load and is also independent of parameters such as evaporation pressure and temperature.

  The characteristics of a steam turbine are:

  (1) No combustion, high exhaust gas temperature;

  (2) Without exhaust pressure and without expansion, it can be designed as a vacuum pump or a booster pump.

  (3) Without speed variation, it can be configured as a variable-speed regulating unit;

  (4) No slip-loss, allowing the use of variable-speed units;

  (5) High efficiency, and can be configured as a back-pressure unit;

  (6) Can achieve continuous operation;

  (7) Relatively compact structure;

  (8) Operates safely and smoothly with high reliability;

  (9) Low noise and minimal vibration allow for the creation of silent generator sets;

  (10) Complex structure, suitable for applications with high requirements.


 Power generation steam turbine unit


   What are the differences between steam turbine generating units and gas turbines?

  1. A gas turbine generator set is a device that generates electricity by utilizing the thermal energy of gas. Its main features include high thermal efficiency, simple structure, stable operation, and economic performance. A gas turbine, on the other hand, primarily uses natural gas or a mixture of natural gas and air as its fuel. Its key characteristics are: high thermal efficiency, stable operating conditions, economic operation, and low pollution. However, it has a complex structure, requires highly specialized manufacturing processes, involves advanced technology, incurs high costs, demands extensive maintenance during operation, and has a higher failure rate compared to gas turbine generator sets.

  II. Basic Components of Gas Turbines The main components include the turbine body itself, the fuel supply system, the governing system, and auxiliary equipment. 1. Turbine Body The turbine body is primarily the component responsible for performing work. Its functions encompass the turbine, generator, speed governor, exciter, synchronizing device, and electrical protection system.

   What are the uses of power turbine units?

  The primary application of power turbine units in the power industry is to supply steam to large-scale power generation units and to provide electricity to industrial and commercial users. Secondly, power turbine units can also be used for power generation purposes in various industrial processes; some industrial applications include refineries and oxygen plants, among others.

   Power generation steam turbine unit What is the working principle?

  The operating principle of a power-generation steam turbine is based on the combination of a steam turbine and a generator. Steam expands within the turbine cylinder, driving the rotor to rotate. The rotating rotor, through centrifugal force, simultaneously drives the rotor of the generator and the generator blades mounted on the generator shaft, ensuring that the rotor’s rotational speed matches the frequency of the electrical energy generated by the generator. This creates a mutual conversion between mechanical energy and electrical energy, thereby producing electricity. As the generator rotates, it in turn drives the generator blades on the generator shaft, converting mechanical energy back into electrical energy. This mechanical energy is then converted into thermal energy by the steam turbine and subsequently transformed back into mechanical energy. In this way, the steam turbine effectively serves as a generator.

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