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Your search keyword '"DOWEJKO, Jakub"' showing total 12 results
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12 results on '"DOWEJKO, Jakub"'

1. TCO Analysis of Conventional and Electric Vehicles on the Example of Operations of the Polish Enterprise

Author

Miśkiewicz, Radosław, Lewiński, Mateusz, Drożdż, Wojciech, Dowejko, Jakub, Miązek, Paweł, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Alareeni, Bahaaeddin, editor, and Hamdan, Allam, editor

Published
2024
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4. Improvement of Hydrogen-Resistant Gas Turbine Engine Blades: Single-Crystal Superalloy Manufacturing Technology.

Author

Balitskii, Alexander I., Kvasnytska, Yulia H., Ivaskevych, Ljubomyr M., Kvasnytska, Katrine H., Balitskii, Olexiy A., Miskiewicz, Radoslaw M., Noha, Volodymyr O., Parkhomchuk, Zhanna V., Veis, Valentyn I., and Dowejko, Jakub Maciej

Subjects
GAS turbine blades, DENDRITIC crystals, HYDROGEN embrittlement of metals, CASTING (Manufacturing process), INTERNAL combustion engines
Abstract

This paper presents the results of an analysis of resistance to hydrogen embrittlement and offers solutions and technologies for manufacturing castings of components for critical applications, such as blades for gas turbine engines (GTEs). The values of the technological parameters for directional crystallization (DC) are determined, allowing the production of castings with a regular dendritic structure of the crystallization front in the range of 10 to 12 mm/min and a temperature gradient at the crystallization front in the range of 165–175 °C/cm. The technological process of making GTE blades has been improved by using a scheme for obtaining disposable models of complex profile castings with the use of 3D printing for the manufacture of ceramic molds. The ceramic mold is obtained through an environmentally friendly technology using water-based binders. Short-term tensile testing of the samples in gaseous hydrogen revealed high hydrogen resistance of the CM-88 alloy produced by directed crystallization technology: the relative elongation in hydrogen at a pressure of 30 MPa increased from 2% for the commercial alloy to 8% for the experimental single-crystal alloy. [ABSTRACT FROM AUTHOR]

Published
2024
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7. The Impact of RES Development on the Distribution Network, Based on the Example of the Polish DSO

Author

Drożdż, Wojciech and Dowejko, Jakub

Subjects
Renewable energy sources -- Poland, Electric power distribution -- Poland, Renewable energy sources -- Economic aspects, Renewable energy sources -- Law and legislation -- Poland, General Economics, Econometrics and Finance, General Business, Management and Accounting
Abstract

PURPOSE: Apart from many challenges and new development directions, the energy transformation also determines many variables that fit into the new realities of the industry with fairly well-established foundations. One of them is certainly the power generation sector. A huge challenge for the European Union Community is the creation of new legal regulations that will be universal for all EU members, but above all, possible to be implemented in the target countries., DESIGN/METHODOLOGY/APPROACH: With regard to national regulations in Poland, new legislative solutions are necessary for the implementation of innovative technological solutions, based, for example, on the operation of hydrogen buffers or a huge number of new prosumers i.e. entities simultaneously producing and consuming electricity for their own use., FINDINGS: There are many benefits to using renewable energy sources on your farm. It also allows for great independence from energy supplies from power plants, but above all, they are environmentally friendly (they do not emit practically any harmful compounds into the atmosphere)., PRACTICAL IMPLICATIONS: The presented study contains basic information on the types of micro-installations and their development over the years. A detailed list of connections to the grid of new installations in 2020 on the distribution grid of Enea Operator (DSO) was also presented., peer-reviewed

Published
2022

9. Wybór miejsca zainstalowania wodorowego bufora energetycznego w systemie elektroenergetycznym.

Author

BANASZAK, Szymon, ZEŃCZAK, Michał, MAŁYSZKO, Olgierd, DOWEJKO, Jakub, and JAWORSKI, Jarosław

Subjects
HYDROGEN as fuel, FLOW measurement, ENERGY storage, HYDROGEN
Abstract

Copyright of Przegląd Elektrotechniczny is the property of Przeglad Elektrotechniczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2022
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