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Evaluation of system for economically viable thermal power plant operation
Martin Bricl, Jurij Avsec, 2019, izvirni znanstveni članek

Opis: Taking into consideration the impacts of global warming and strict European Union policy 2030 climate & energy framework, it is imminent for conventional thermal power plants to modernize their infrastructure for achieving economically viable operation on demanding electricity market. In the scope of the paper is presented author%s individual research work - economic evaluation of conventional thermal power plant operation with solar central receiver system and flue gas desulphurization installation. The goal of research work is to determine whether the designed model is profitable on current European electricity market or not. Based on analytical calculations and gathered numerical data for the designed model, a program code was generated in mathematical environment Matlab, that enables simulation of operation for the designed model in the annual time period. Positive and pessimistic scenarios were analyzed. Results are presented numerically and also graphically and show a positive contribution to the economically viable operation of conventional thermal power plants.
Ključne besede: thermal power plant, economically viable operation, a solar central receiver system, renewable technologies, flue gas desulphurization
Objavljeno v DKUM: 22.02.2024; Ogledov: 240; Prenosov: 11
.pdf Celotno besedilo (1019,76 KB)
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Optimal control of gain and offset in direct conversion receivers : magistrsko delo
Amadej Maurič, 2023, magistrsko delo

Opis: In the master’s thesis, the development and implementation of optimal control for direct conversion receiver is presented. A background overview of direct conversion receivers, in-phase and quadrature mixers, sampling theory, control theories, adaptive systems, and optimal control is given. The development of a system model which is later used in simulations is also presented. Optimal control is achieved through standard control techniques, such as feedback and feedforward control, with error functions giving restrictions. Information to feed the optimal control is acquired by the system through the analog converters to the digital converters, digital to analog converters, and received signal strength indicators. For the development and testing of optimal control, MATLAB environment was used. Simulations and presentation of the results were also done in MATLAB. Limitations, exact operation, and comments were given throughout the thesis
Ključne besede: optimal control, direct conversion receiver, radio frequency signal, simulation, MATLAB
Objavljeno v DKUM: 23.11.2023; Ogledov: 312; Prenosov: 0

Design of thermal power plant modernization and rehabilitation model for the new market demands and challenges
Martin Bricl, Jurij Avsec, 2021, izvirni znanstveni članek

Opis: The article presents the model for the rehabilitation of existing conventional thermal power plants in order to lower the consumption of fossil fuels. Instead of them, the model uses an alternative energy source - sun irradiation. The proposed rehabilitation model is theoretically calculated and designed. The model in the software environment Matlab Simulink was developed, based on previous calculations and determined parameters. In this article, it is presented the combination of Clausius - Rankine process and solar central receiver system. The model enables simultaneous calculations of exit model parameters for the complete model, based on predetermined entering parameters of the model.
Ključne besede: Clausius Rankine process, solar central receiver system, modeling, analysis, Matlab Simulink software environment
Objavljeno v DKUM: 10.11.2023; Ogledov: 231; Prenosov: 13
.pdf Celotno besedilo (1001,15 KB)
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Study of the receiving system of a Low Power Tag Detector and its usage in RFID and NFC applications : magistrsko delo
Jovanka Dimkovska, 2022, magistrsko delo

Opis: This work presents an observation of the analog and digital architecture of the reception system of a radio-frequency identification (RFID) reader in the high frequency (HF) domain and the creation of near-field communication (NFC) Application, which is developed for Android and iOS users. This thesis includes a description of RFID and NFC technology, as well as a sufficient amount of information about the standards that define those technologies. The reception system of a given interrogator was thoroughly studied, beginning with the analog signal on the interrogator’s antenna and how it is interpreted in the analog domain for determining the presence of an object in its vicinity. The most emphasis in this thesis was given to the reader when it is in a Tag Detector mode. The Tag Detector mode of the reader is the mode in which the interrogator can detect changes on its antenna. Measurements were taken while testing the Tag Detector at various gain settings of the reception system. To improve the accuracy of those detections, the Tag Detector mode was switched to reader mode, allowing the detected tag’s acknowledgement message to be received. The detection range, as well as the reading range of the interrogator, are also discussed. An NFC application was developed that functions as an interrogator for both the iOS and Android operating systems. The goal of this application is to apply the knowledge we have gained from the study about RFID and NFC communications, as well as the comparison between the tag detection and read ranges of the two types of interrogators.
Ključne besede: Keywords: NFC, RFID, receiver, transmitter, Tag Detector, interrogator, read range, tag detection range
Objavljeno v DKUM: 28.06.2022; Ogledov: 722; Prenosov: 54
.pdf Celotno besedilo (1,92 MB)

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