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Formulations of parametric models for energy and power system elements in the aspect of control quality improvements

Wójcicka-Migasiuk D., Paśnikowska-Łukaszuk M.

Rynek Energii

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2018

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Nr 3

82--88

EN

The paper presents the elements of analyses of thermal system operation performed on the fundament of real values received from continuous measurement and models formulated on this data basis. The system is a part of a thermal power plant supplied from boilers and turbines cooperating with volume heat exchangers. The measurements have been recorded in heating seasons and collect several simultaneous parameters of operation. Then, the models have been formulated on the real data and in turn new values generated. The presented research elements are based on linear parametric models with the preliminary non minimal phase parametric models. The paper presents and describes simplifications introduced to system diagrams to formulate the parametric models and their operation. The characteristic for this analysis is the transfer from the presentation of physical processes towards relation between in and out parameters. MATLAB and MathCad tools are used for the calculation. The conclusions that could follow the composition of the models are important especially in the aspect of effectiveness taking into account that the real data comes from a fully controlled system which as such meets all requirements. This additional diagnostics of energy system elements lets us precise the control, minimise the loss of energy and allows for better control for the use of fuels. Moreover the formulation of prognosis of improved accuracy in comparison to the reference, which is to be worked out, would be advantageous from the point of energy business. The possibility to increase the amount of energy production from conventional fuels and biofuels, generally known of medium efficiency, can have the impact either on technology or on public appreciation for unconventional fuel.

PL

W artykule przedstawiono elementy analizy pracy układu przepływu ciepła wykonane na podstawie wartości rzeczywistych otrzymanych pomiarów oraz modeli sformułowanych na podstawie tych danych. System, który został wykorzystany do opisania procedury jest częścią elektrociepłowni zasilanej z kotłów i turbin współpracujących z wymiennikami ciepła. Pomiary rejestrowano w okresach grzewczych i zbierano kilka równoczesnych parametrów pracy. Następnie na podstawie rzeczywistych danych sformułowano modele i kolejno wygenerowano nowe wartości. Przedstawione elementy badań bazują na liniowych modelach parametrycznych tzw. nie minimalno fazowych. W artykule przedstawiono także uproszczenia wprowadzone do schematów systemowych umożliwiające sformułowanie przedstawionych modeli parametrycznych. Charakterystyczną cechą tej analizy jest rezygnacja z badania przebiegu procesów fizycznych na rzecz zależności pomiędzy parametrami wejścia i wyjścia. Do obliczeń wykorzystywano narzędzia MATLAB i MathCad. Wnioski, które mogą wynikać z uzyskanych modeli są ważne, zwłaszcza w aspekcie zwiększenia skuteczności pracy całego układu, biorąc pod uwagę, że dane rzeczywiste pochodzą z systemu w pełni kontrolowanego, który jako taki spełnia wszystkie wymagania. Ta dodatkowa diagnostyka elementów systemu energetycznego może przyczynić się do zwiększenia skuteczności sterowania, a co z tym się wiąże do redukcji strat energii poprzez poprawę kontroli zużycia paliwa. Możliwość zwiększenia produkcji energii z paliw konwencjonalnych oraz biopaliw, ogólnie uważanych jako paliwa o niższej wydajności, może mieć wpływ na zwiększenie popytu na biopaliwa, także na skutek poprawy opinii społecznej odnośnie paliw niekonwencjonalnych.

2

Selected Aspects of Development Towards Energy Efficient Buildings

Wójcicka-Migasiuk D., Paśnikowska-Łukaszuk M.

Journal of Ecological Engineering

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2017

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Vol. 18, nr 5

137--143

EN

The focal point is to present the areas where the technology in buildings can be supported by proper motivation and take substantial advantage measurable in technical units. The need to understand the integration between ecology, society, economy and technology is crucial when global improvements are the targets. These targets should consider urban environments as natural human settlement, in the understanding that accepts human psychological needs for wide and deep education, acquiring highly professional satisfaction without resigning from family style of life and leisure as natural. It is necessary to accept human production also in its advanced levels as a natural human activity and to combine it with the other afore-mentioned components of integration. Attention has been directed to clean energy certification in newly constructed objects and refurbished buildings, formation of owner’s responsibility for the possessed goods and their best use in sustainable development. Particular attention has been drawn to the increasingly popular manner of using resources only if it is justified by proportionally very high advantages to the society. This has been presented with the examples of energy savings in low energy and passive buildings. Moreover, the examples show the ways of sustainable development which include the use of renewable energy, using coal only in collective industrial systems very restricted in terms of protection against pollution and uncontrolled use of energy, and similarly, of other conventional fuels, water and land.

3

The role of computer animation in teaching technical subjects

Dziedzic K., Barszcz M., Paśnikowska-Łukaszuk M, Jankowska A.

Advances in Science and Technology. Research Journal

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2015

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Vol. 9, nr 28

134--138

EN

Computer animation has a positive effect on memorizing knowledge by students. Used in the process of teaching of technical subjects, it is conductive to the development of mind. Animation allows to familiarize the students with the schemes of solving technical problems and shows the mode of operation of machinery and equipment. In the technique, animations are used, inter alia, in the processes of designing, engineering calculations, visualisation and monitoring technological processes and visualisation of assembly processes. The article discusses the role of computer animation in the teaching process and the examples of applications using computer animation and supporting the teaching process of technical subjects. Selected examples of technical processes in both computer-aided design and manufacturing programs as well as in graphics and animation programs are presented.