Autor: Dombek, G. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Thermal properties of nanoliquids prepared on the basis of natural ester modified by nanoparticles TiO₂ and C₆₀
Autorzy:: Dombek, G.
Powiązania:: https://bibliotekanauki.pl/articles/97730.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: natural esters
thermal conductivity
viscosity
density
specific heat
high voltage power transformers
heat transfer coefficient
nanoliquids
Opis:: In this paper the results of the researches concerning thermal properties of insulting nanoliquids received on the basis of natural ester, titan dioxide TiO₂ and fullerene C₆₀ were presented. Thermal conductivity, viscosity, density and specific heat are these thermal properties. The range of the temperature was changing from 25°C to 80°C. These properties are crucial from the viewpoint of heat transfer coefficient by insulating liquid used in insulating system of power equipment; thus, they influence on temperature distribution inside the equipment. The possibility of receiving steady nanoliquids was also analyzed. The impact of natural ester modification by nanoparticles and surfactant on thermal properties of received nanoliquids was proved.
Źródło:: Computer Applications in Electrical Engineering; 2015, 13; 404-413
1508-4248
Pojawia się w:: Computer Applications in Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Thermal properties of nanoliquids in the aspects of their used in the insulation system of high voltage power transformer
Autorzy:: Dombek, G.
Nadolny, Z.
Przybyłek, P
Powiązania:: https://bibliotekanauki.pl/articles/97610.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: nanoliquids
high voltage power transformers
thermal properties
Opis:: The article presents information concerning the electrical and thermal properties of nanoliquids in the context of their use in the insulating system of high voltage power transformers. It consists of six chapters. The first chapter is an introduction. The second chapter describes properties of the modern insulating nanoliquids created on the basis of mineral oil and nanoparticles. The third chapter is devoted to the measurement systems to the measure of the viscosity, thermal conductivity and density. The fourth chapter presents the methods of preparation of nanoliquids. In the fifth chapter the viscosity, thermal conductivity and density of mineral oil and nanoliquids were compared. Article ends with a summary.
Źródło:: Computer Applications in Electrical Engineering; 2014, 12; 217-226
1508-4248
Pojawia się w:: Computer Applications in Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Mathematical modeling the temperature field of power transformer
Autorzy:: Gościński, P.
Dombek, G.
Nadolny, Z.
Bródka, B.
Powiązania:: https://bibliotekanauki.pl/articles/97688.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: high voltage power transformers
similitude theory
ANSYS CFX
mineral oil
Opis:: High voltage transformer is one of the most important elements of the power system. Due to this reason, it is crucial to properly design and build from mechanical side as well as thermal side. Nowadays, designers of power transformers are using from the many programs that allow you to reduce design time. Additionally, thanks to them, designer can quickly and effectively bring new changes in the construction and see what will be their impact on the work of the transformer. This paper shows design assumptions of the mathematical model of power transformer, the similitude theory which was used to maintain an appropriate scale, and interface of Ansys CFX program, in which simulations of temperature field of power transformer was made.
Źródło:: Computer Applications in Electrical Engineering; 2016, 14; 138-147
1508-4248
Pojawia się w:: Computer Applications in Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Analysis of heat transfer coefficient of synthetic and natural ester in the aspect of their application in power transformer
Autorzy:: Gościński, P.
Dombek, G.
Nadolny, Z.
Bródka, B.
Powiązania:: https://bibliotekanauki.pl/articles/97728.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: heat transfer coefficient
high voltage power transformers
synthetic ester
natural ester
Opis:: Insulating liquids due to their properties are used in electrical power transformers, capacitors, connectors and high voltage power cables. One of the most important tasks for electrical insulating liquids is a heat transport out of the device. The heat transfer in the liquids depends on heat transfer coefficient. The heat transfer coefficient depends on a viscosity, thermal conductivity coefficient and thermal expansion coefficient. This paper shows results of calculations for heat transfer coefficient of insulating liquids used as insulation in electrical equipment, depending on the kind of liquid and temperature. Synthetic ester oil and natural ester oil were analyzed. The range of the temperature was changing from 25°C to 80°C.
Źródło:: Computer Applications in Electrical Engineering; 2015, 13; 376-385
1508-4248
Pojawia się w:: Computer Applications in Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

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