scholarly journals Optimal Control of Thermal Pollution Emitted by Power Plants

2020 ◽  
Author(s):  
Lèye Babacar ◽  
Tine Léon Matar ◽  
Sy Mamadou
Keyword(s):  
Optimal Control ◽  
Power Plants ◽  
Thermal Pollution

Boiler Modelling and Optimal Control of Steam Temperature in Power Plants

2009 ◽  
Vol 42 (9) ◽  
pp. 125-130 ◽  
Author(s):  
S. Rominus Valsalam ◽  
Anish S ◽  
B. Raja Singh
Keyword(s):  
Optimal Control ◽  
Power Plants ◽  
Steam Temperature

scholarly journals Model of a Wind Turbine with Variable Blade Angle

2021 ◽  
Vol 25 (1) ◽  
pp. 41-48
Author(s):  
Stanisław Chudzik
Keyword(s):  
Optimal Control ◽  
Wind Turbine ◽  
Rotational Speed ◽  
Power Plants ◽  
Turbine Blades ◽  
Wind Farms ◽  
Blade Angle ◽  
Battery Cell ◽  
General Belief ◽  
Wind Speeds

The article presents the results of research into the operation of a model of a wind micropower plant with a variable blade angle. The research was carried out on a miniature model of a measuring stand built for the purpose of carrying out work on pre-developed projects of wind micro power plants. The stand allows to carry out measurements related to the selection of the optimal propeller geometry, as well as the development and testing of algorithms for optimal control of the micropower plant. The physical basics of wind turbine operation and the methods of its optimal control are presented. The results of the performed measurements for the selected propeller blade geometry with the possibility of changing its setting angle are presented. A DC generator with a load with a non-linear characteristic in the form of a Li-Po battery cell was used. The results of operation of a simple MPPT control algorithm are presented. The lack of optimal control systems for the operation of micropower plants is dictated by the general belief that the costs of its production are high in relation to the possible improvement of the efficiency of micropower plants. Moreover, the practical methods of controlling larger wind turbines are not optimal for small and very small turbines. The conducted research focused on determining the possibility of using turbines with variable blade angles depending on its rotational speed. In larger wind farms, changing the blade angle is mainly used to limit the power of the turbine at high wind speeds. In micro wind power plants such solutions are not used for economic reasons. However, the use of a simple mechanism for changing the angle of the blades depending on the rotational speed of the propeller can increase the efficiency of the turbine in a wider range of wind speeds. The small dimensions of the research model allow for quick and cheap development of preliminary prototypes of turbine blades thanks to the possibility of using 3D printing technology.

scholarly journals Integrated Process Design and Control for Smart Grid Coordinated IGCC Power Plants Using Economic Linear Optimal Control

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 288 ◽  
Author(s):  
Jin Zhang ◽  
Sofia Garcia Fracaro ◽  
Donald J. Chmielewski
Keyword(s):  
Optimal Control ◽  
Smart Grid ◽  
Process Design ◽  
Carbon Capture ◽  
Power Plants ◽  
Integrated Design ◽  
Combined Cycle ◽  
High Price ◽  
Linear Optimal Control ◽  
And Control

The Integrated Gasification Combined Cycle (IGCC) possesses a number of advantages over traditional power generation plants, including increased efficiency, flex-fuel, and carbon capture. A lesser-known advantage of the IGCC system is the ability to coordinate with the smart grid. The idea is that process modifications can enable dispatch capabilities in the sense of shifting power production away from periods of low electricity price to periods of high price and thus generate greater revenue. The work begins with a demonstration of Economic Model Predictive Control (EMPC) as a strategy to determine the dispatch policy by directly pursuing the objective of maximizing plant revenue. However, the numeric nature of EMPC creates an inherent limitation when it comes to process design. Thus, Economic Linear Optimal Control (ELOC) is proposed as a surrogate for EMPC in the formulation of the integrated design and control problem for IGCC power plants with smart grid coordination.

Monitoring of Excess Temperature Fields

1983 ◽  
Vol 15 (10) ◽  
pp. 165-175
Author(s):  
J. Bundgaard Nielsen
Keyword(s):  
Power Plants ◽  
Thermal Pollution ◽  
Temperature Fields ◽  
Excess Temperature ◽  
Excess Heat ◽  
Environmental Standard ◽  
Hydrographic Conditions

In the process of monitroing the impacts resulting from thermal pollution from power plants the excess heat is widely used as an indicator. One single environmental standard may however not be appropriate to cover the different physical aspects of locations for such plants. This paper discusses various approaches (intensive and long-term measurements, modelling) and the interrelation to hydrographic conditions, and as the final result, the definition or revision of monitoring programmes. The presentation is elucidated with examples from recent Danish monitoring programmes.

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