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Control is the conscious impact on a process in order to realize specific goals. When controlling complex industry processes, the most frequent control method is based on a layered structure (hierarchical), which includes a layer of regulation and protection and a layer of optimization. The optimization layer is used to identify the most cost-effective levels for the regulation layer. This includes...
Gas turbine combined cycle power plants are one of the most efficient energy conversion systems. These systems encompass: a gas turbine cycle, steam turbine cycle and heat recovery steam generator. The electrical power of a gas turbine combined cycle power plant heavily depends on ambient parameters — mainly on temperature. A variation of ambient parameters changes the compressor's working point,...
Current operation control systems require advanced analytical tools, including mathematical models. A mathematical model can be developed either as an analytical model or as an empirical model. Compared to analytical models, the empirical ones are easier to formulate, however their applicability range is limited to the operating parameters, for which a particular model has been calibrated. Good results...
The paper presents a mathematical model, results of calculations and energetic characteristic of biomass fired recirculating flue gas fluidized bed boiler. Methodology of calculation and mass and energy balances were worked out according to standards PN-EN 12953 - 15 and DIN 1942. In order to develop mass and energy balances, compositions of flue gas were used. These equations create a non-linear...
The paper presents the methodology, algorithm and results of simulations of single pressure heat recovery steam generator. The analyzed waste boiler contains economizer, evaporator, primary, secondary superheater and desuperheater. Using mass and energy balances, the mathematical model of HRSG is worked out. Development of analytical model of heat transfer in heat recovery steam generator is very...
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