Intelligent building laboratory in didactics of electrical and process control enginering faculty

Obserwowany w ostatnich latach dynamiczny rozwój systemów automatyki budynku i związanych z nimi tzw. „inteligentnych instalacji” pociąga za sobą konieczność wprowadzenia tej tematyki do programu studiów. W związku z tym na Wydziale Elektrotechniki i Automatyki Politechniki Gdańskiej zostało opracowane i zbudowane nowoczesne laboratorium dydaktyczne służące do nauczania projektowania i uruchamiania systemów automatyki budynkowej opartych na standardzie KNX/EIB. W pracy przedstawiono założenia jakimi kierowano się przy tworzeniu laboratorium, opis konstrukcji stanowisk, dobór elementów i przyjętą metodykę nauczania.The large increase in building control systems and intelligent installation causes the necessity to insert this subject into the program of study. In respect of it, advanced didactic laboratory of “intelligent building” was designed and built at the Faculty of Electrical and Control Engineering of Gdansk University of Technology. This laboratory can be used for teaching designing and implementation of KNX building automatics system which is a worldwide standard. The idea, modules selection rules and the work-table construction specification were described at this paper. Moreover the teaching method and subjects were presented

Numerical analysis of heat efficiency of the convective heat exchanger build with horizontal plates

The paper discusses the problem of placing horizontal shelves on the heating effect and performance of radiator. Results of invstigations shown clearly that the best option is a window without sills. Such configuration asures maximum efficiency. The smaller width of window sill, the higher efficiency. Similarly, the height of sill above radiator. Bigger values of sill height asure higher efficiency of heat-exchanger. Before installing the shelves of such type it should be reconsidered whether we want a more practical use of sills (often as a shelf for plants or books) or on more favorable terms of air circulation in the room and higher efficiency

Intelligent electrical installations design with EIB tool software (ETS)

Rozwoj systemow automatyki budynku i wiążące się z ich zastosowaniem zwiększenie funkcjonalności i komfortu eksploatacji budynku, a także zmniejszenie zużycia energii, skutkuje coraz większym zainteresowaniem inwestorów nowoczesnymi rozwiązaniami, a zwłaszcza systemami inteligentnymi. Jednym z systemów inteligentnych dedykowanych do budynków mieszkalnych oraz użyteczności publicznej jest system Europejskiej Magistrali Instalacyjnej KNX/EIB. Jest to system zdecentralizowany pozwalający, poprzez zmianę oprogramowania, na zmianę funkcji i parametrów urządzeń istniejących w danym budynku, bez konieczności przebudowy instalacji. Projektowanie instalacji i programowanie urządzeń odbywa się za pomocą specjalistycznego programu ETS (EIB Tool Software). W pracy zaprezentowano zasady projektowania inteligentnej instalacji elektrycznej z wykorzystaniem programu ETS. Przedstawiono przykładowy projekt wdrożonej instalacji elektrycznej.Building systems which give comfort of living and energy consumption decreasing are often implemented now. One of that system is KNX/EIB system dedicated for house and public buildings. KNX/EIB system is a decentralised bus system and does not require a central controller. In case of changing of the instaled devices function in the building only software application modification is necessary. Design process of the electrical installations in KNX/EIB system is performed in ETS (EIB Tools Software). In the paper principles of the KNX/EIB system designing are described. Implemented project of the electrical installation is presented

Computer-aided electrical lighting design of staircase of Electrical and Control Engineering Faculty

W pracy przedstawiono projekt oświetlenia elektrycznego klatki schodowej budynku Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej. Projekt ten wykonano zgodnie z wymaganiami aktualnych przepisów i norm. Wykonane w ramach projektu wizualizacje pozawalają na wyobrażenie oświetlenia klatki schodowej po modernizacji.In the paper computer design of electrical lighting of Faculty of Electrical and Control Engineering staircase is presented. This design is performed according to the up-to-date national requirements. A computer visualization is also performed. The visualization enables to imagine lighting of staircase after the modernization

Impact of the selected renewable energy sources on active and reactive power losses in a power system

Moc zainstalowana oraz produkcja energii elektrycznej z odnawialnych źródeł energii od kilkunastu lat systematycznie w Polsce wzrasta. Należy spodziewać się, że tendencja ta w najbliższych latach zostanie utrzymana. Dość dużym zainteresowaniem cieszą się źródła wiatrowe oraz źródła fotowoltaiczne, co sprawia, że przy znacznych ich mocach zainstalowanych konieczne staje się badanie wpływu tych źródeł na system elektroenergetyczny. W artykule przedstawiono analizę wpływu farmy fotowoltaicznej i farmy wiatrowej na poziom strat mocy czynnej i biernej w systemie elektroenergetycznym. Obliczenia wykonano z wykorzystaniem programu DIgSILENT PowerFactory.The rated power and the production of energy from renewable energy sources for several years steadily increases in Poland. It is expected that this trend will be continued in the coming years. Wind and photovoltaic sources are very popular and in consequence it becomes necessary to study the impact of these sources on the power system. The article presents an analysis of the impact of photovoltaic farm and wind farm on the level of loss of active and reactive power in the power system. Calculations were performed with the use of DIgSILENT PowerFactory software

Comparative Analysis of Reactive Power Compensation Devices in a Real Electric Substation

A constant worldwide growing load stress over a power system compelled the practice of a reactive power injection to ensure an efficient power network. For this purpose, multiple technologies exist in the knowledge market out of which this paper emphasizes the usage of the flexible alternating current transmission system (FACTS) and presents a comparative study of the static var compensator (SVC) with the static synchronous compensator (STATCOM), inducted in a real electric substation. The aim is to improve the power factor (PF) and power quality and to encounter reliably extreme conditions. A 220 kV electric substation was opted for the analysis, and both the static and dynamic conditions were observed with the help of a power system analysis tool termed PowerFactory-DIgSILENT. Multiple aspects were investigated via software simulations to assess the performance of the aforementioned FACTS devices, such as the voltage profile evaluation via the load flow analysis method (LFA), the harmonic response via the power quality and harmonic analysis tool, and the short-circuit response via the RMS simulation tool. The outcomes were verified and compared with permissible values included in the universal standards, such as IEC and IEEE. The superiority of the STATCOM over the SVC was proven in light of the simulative results

Comparative Analysis of Reactive Power Compensation Devices in a Real Electric Substation

A constant worldwide growing load stress over a power system compelled the practice of a reactive power injection to ensure an efficient power network. For this purpose, multiple technologies exist in the knowledge market out of which this paper emphasizes the usage of the flexible alternating current transmission system (FACTS) and presents a comparative study of the static var compensator (SVC) with the static synchronous compensator (STATCOM), inducted in a real electric substation. The aim is to improve the power factor (PF) and power quality and to encounter reliably extreme conditions. A 220 kV electric substation was opted for the analysis, and both the static and dynamic conditions were observed with the help of a power system analysis tool termed PowerFactory-DIgSILENT. Multiple aspects were investigated via software simulations to assess the performance of the aforementioned FACTS devices, such as the voltage profile evaluation via the load flow analysis method (LFA), the harmonic response via the power quality and harmonic analysis tool, and the short-circuit response via the RMS simulation tool. The outcomes were verified and compared with permissible values included in the universal standards, such as IEC and IEEE. The superiority of the STATCOM over the SVC was proven in light of the simulative results