Profil autora
dr hab. inż., prof. AGH
Pytel, Krzysztof
Ładuję...
person.page.employee
Wydział / Jednostka Organizacyjna
Wydział Inżynierii Mechanicznej i RobotykiJednostki organizacyjne (rel.)
Jednostka AGH
Profile autora
Wyniki wyszukiwania publikacji
Teraz pokazywane1 - 6 z 6
- Fragment książkiOtwarty dostępDetermination of thermal-stressed state of inhomogeneous orthotropic cylindrical shell under thermal heating(Wydawnictwa AGH, 2023) Musii, Roman; Melnyk, Nataliia; Zhydyk, Uliana; Melnyk, Mykhaylo; Oryshchyn, Oksana; Pytel, KrzysztofSystems of initial equations of the nonstationary problem of heat conductivity and the quasistatic problem of thermoelasticity for an inhomogeneous orthotropic cylindrical shell under its thermal heating by the external environment are recorded. Using double finite integral Fourier transforms in spatial coordinates and the Laplace transform over time, we obtained general solutions to the formulated thermoelasticity problems for a given finite hinged supported at the shell edges.
- Fragment książkiOtwarty dostępAnalysis of processes that take place in absorber of absorption chiller(Wydawnictwa AGH, 2023) Lobur, Mykhaylo; Kurdziel, Franciszek; Pytel, Krzysztof; Kalwar, Adam; Grzywnowicz, GrzegorzMethods of using absorption chillers are presented based on the example of a mine air-conditioning system. This paper presents the application of the possibility of using thermal energy as a waste product that results from the combustion of gas (methane; $CH_{4}$) in gas engines and the process of its processing into the production of a cooling medium. The principle of the operation of an absorption chiller is described – the processes in the absorber, the physicochemical changes in the system, and the method of producing chilled water. The actual application of cascadeconnected refrigeration devices is presented in order to achieve a final product with specific parameters.
- Fragment książkiOtwarty dostępAnalysis of methane as energy fuel – operational issues(Wydawnictwa AGH, 2023) Kalwar, Adam; Pytel, Krzysztof; Kurdziel, Franciszek; Grzywnowicz, Grzegorz; Melnyk, MykhayloIssues that are related to the operation of cogeneration generators that are powered by gas engines that use mine gas as a fuel are presented. Gas engines are increasingly being used to drive electric generators; in such an application, gas is used as a fuel, whether it is mine gas, coke oven gas, septic tank gas, or mains natural gas. In an area where coal is mined, mine gas is commonly used as a fuel to power combined heat and power (CHP) generators. The use of mine gas as a fuel is highly desirable – both for environmental and economic reasons. The benefits and difficulties of using this gas as a fuel are presented.
- Fragment książkiOtwarty dostępAnalysis of compressor units – operational issues(Wydawnictwa AGH, 2023) Kurdziel, Franciszek; Pytel, Krzysztof; Kalwar, Adam; Grzywnowicz, Grzegorz; Zdobytskyi, AndriyThe characteristics of compressor chiller operation for the generation of cooling for the central systems of mine air-conditioning installations are presented. The modes of operation of the units and their use in the final stage of chilled-water cooling are described. The construction of the screw compressor and the compression methods are discussed. The actual use of compressors in the third stage of chilled water generation is analyzed. The free-cooling installation as a solution for supporting chilled-water generation is presented.
- Fragment książkiOtwarty dostępAnalysis of external factors that affect availability of gas engines(Wydawnictwa AGH, 2023) Kalwar, Adam; Pytel, Krzysztof; Kurdziel, Franciszek; Grzywnowicz, Grzegorz; Marikutsa, UlianaThe factors that directly affect the operation of the gas-fired internal combustion engines that are used in grid-connected generators are presented. Those factors that hinder their operation are also presented, along with ways to solve problems at the operating stage. Our conclusions are also presented for the future that can be used in further projects of cogeneration installations.
- Fragment książkiOtwarty dostępTopology optimization parameters of blades of wind turbines(Wydawnictwa AGH, 2023) Pytel, Krzysztof; Zdobytskyi, Andriy; Lobur, Mykhaylo; Panchak, Roman; Hnatiuk, AnnaThis work provides peculiarities of the production of various elements of complex geometric shapes by the newest technologies of additive production. It considers the possibility of modernizing and improving the design of wind turbine blades by the classical method of topological optimization while taking the wind load vector into account and preserving their functional properties. Using the topological optimization algorithm of the Inventor Nastran software environment, the design of a wind turbine blade was automatically generated in accordance with the geometric constraints on the shape and minimization in terms of its weight and maximum rigidity. It also shows the peculiarities of generating a wind turbine blade design with changes in the parameters of topological optimization ([COMPVF], [TOPTMANCONSTR], [TOPGEN], and [TOPTMANCORD]) and the maximum and minimum airflow forces.