Many of these tasks can be supported by simulating the operational behaviour of the turbine in advance.
Today, the steam turbine industry faces numerous challenges concerning efficiency, commissioning time, start-up times, operation, availability, safety, cost-effectiveness, etc.
Steam Turbine Diagram with Parts generator#
Finally, the generator transforms mechanical energy into electrical energy which is available as electric current. The released energy is transformed into rotational energy, which in turn drives a generator. Here, hot steam with up to 300 bar and 600☌ is condensed to approximately 0.03 bar and 25☌. Turbines are used to transform this potential energy into mechanical energy. In a second step, the heat energy is used to produce superheated steam where the (potential) energy is stored as steam enthalpy. First, chemical energy stored in the form of fuel and oxygen is transformed into thermal energy by the process of combustion.
Steam Turbine Diagram with Parts series#
To produce electrical energy, a series of energy conversions are conducted in fossil-fired power plants. Thus it is one link in the chain of energy conversions with the aim of generating electrical energy. The principal task in operating a steam turbine is to convert the energy of hot steam into rotational energy. Hence it depicts the turbine behaviour over a large range of operating points.Ī steam turbine is a module to convert heat energy into mechanical energy. Finally, the last model incorporates mass and energy balances as well as the major non-linearities. The second one incorporates more details and is useful if the operating point is close to the design point. The first model is based on a simple, linear approach and is suitable of giving a quick overview. Also, special attention is directed towards the time dependence of critical states, mainly turbine speed and pressure development in certain areas. Three different approaches will be introduced and compared with respect to different operating situations. Here, a brief overview of models which simulate the transient thermodynamic behaviour of a steam turbine is presented. Thus, the turbine controller may be well tuned with less complex simulation models of turbine, generator and electrical grid, whereas detailed studies of failures, mainly the transient behaviour which may lead to serious damages, may require detailed modelling of the turbine-internal thermodynamic processes. Different tasks require different details regarding the employed turbine simulation model. For example, the commissioning time can be shortened if the turbine controllers are initialized with well-tuned pre-set parameters cost-effectiveness can be increased by setting aside unnecessary devices and exactly determining material specifications safety may be increased by predicting the impacts of failures and thus taking the necessary precautions. Many of these tasks can be supported by simulating the transient operational behaviour of the turbine in advance. Today, steam turbine industry faces numerous challenges concerning efficiency, commissioning time, start-up times, operation, availability, safety, cost-effectiveness, etc. And thus it is one link in the chain of energy conversions with the aim of generating electrical energy. Hence, a steam turbine is one module to convert heat energy into mechanical energy. Hitherto, the largest conventional power plants employ steam turbines as prime movers to drive a generator. This energy conversion is divided into several stages. Within power plants, several physical, chemical and mechanical processes are conducted to transfer the energy, stored in fossil fuel, into electrical energy.
0 kommentar(er)
