Boiler-turbines are one of the most important parts in power generation plants. The safety problem in such systems has always been a special concern. This paper discusses the application of control reconfig uration by fault-hiding approach for a boiler-turbine unit. In Fault-hiding approach, after occurrence of a fault, nominal controller of the system remains unchanged; instead, a reconfigurat...

For the boiler-turbine unit in power systems, a coordinated control structure plays crucial role maintaining balance supply and demand of energy, reducing pollutant emissions optimizing energy efficiency. The matching requirements turbine boiler, wide range load changes, cooperative operation many devices system pose challenges to designing for boiler system, thus making design difficult task. ...

Creep resistant alloys designed for power plant applications like thick section boiler components, steam lines, turbine rotors and turbine castings must be reliable over long periods of time in sever environments. Besides high creep strength these materials must exhibit also other properties, i.e. good corrosion and crack resistance as well as good weldability. The environmental impact and econ...

A thermal power station is a power plant in which the prime mover is steam driven. Water is heated, turns into steam and spins a steam turbine which drives an electrical generator. After it passes through the turbine, the steam is condensed in a condenser and recycled to where it was heated; this is known as a Rankine cycle. The greatest variation in the design of thermal power stations is due ...

A simple two-by-two model for a boiler-turbine unit is demonstrated in this paper. The model can capture the essential dynamics of a unit. The design of a coordinated controller is discussed based on this model. A PID control structure is derived, and a tuning procedure is proposed. The examples show that the method is easy to apply and can achieve acceptable performance.

load management and cost optimization are among the important factors in trigenerationsystems and combined cooling, heating and power (cchp) systems. in this study, an innovative cchpsystem uses a gas turbine as the prime mover and has a heat recovery steam generator (hrsg) in addition toan auxiliary boiler, electric and absorption chillers. the system is tied with the bulk electric grid; to ex...

At Stora Enso Fine Paper Nymölla Mill there is a wish to reduce its dependency on external produced electric power. One suggestion that has been made is to install a hot air gas turbine. The purpose of this thesis is to see if it is thermodynamic and economical to go through with the project with the hot air gas turbine. It is of great importance that the boiler-process remains as unchanged as ...

Introduction Gasifying biomass to produce a combustible gas provides the possibility for much more efficient overall conversion of a given biomass resource into electric power than is possible with traditional combustion-based technologies. In particular, gasified biomass can be used to power internal combustion engines (ICEs), gas turbines, and fuel cells, all of which are able to produce elec...

This paper is constructed with the effort of development of controlled system on the application of a traditional Zeigler-Nichols (Z-N) tuning method implemented for a boiler-turbine power plant to achieve better efficiency of the system. Extensive study and analysis of the state space representation to mathematical modeling approach is developed for the system introducing simulation method. A ...