Browsing by Author "Kalwar, Adam"

Now showing 1 - 7 of 7

Access status: Open Access ,
Analysis of compressor units – operational issues
(Wydawnictwa AGH, 2023) Kurdziel, Franciszek; Pytel, Krzysztof; Kalwar, Adam; Grzywnowicz, Grzegorz; Zdobytskyi, Andriy
The 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.
Access status: Open Access ,
Analysis of external factors that affect availability of gas engines
(Wydawnictwa AGH, 2023) Kalwar, Adam; Pytel, Krzysztof; Kurdziel, Franciszek; Grzywnowicz, Grzegorz; Marikutsa, Uliana
The 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.
Access status: Open Access ,
Analysis of methane as energy fuel – operational issues
(Wydawnictwa AGH, 2023) Kalwar, Adam; Pytel, Krzysztof; Kurdziel, Franciszek; Grzywnowicz, Grzegorz; Melnyk, Mykhaylo
Issues 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.
Access status: Open Access ,
Analysis of processes that take place in absorber of absorption chiller
(Wydawnictwa AGH, 2023) Lobur, Mykhaylo; Kurdziel, Franciszek; Pytel, Krzysztof; Kalwar, Adam; Grzywnowicz, Grzegorz
Methods 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.
Access status: Open Access ,
Badanie eksploatacyjne silników gazowych zasilanych gazem koksowniczym i gazem z odmetanowania kopalń
(Data obrony: 2024-04-08) Kalwar, Adam
Wydział Inżynierii Mechanicznej i Robotyki
Praca ta powstała w ramach doktoratu wdrożeniowego, zidentyfikowała lokalne problemy związane z eksploatacją silników gazowych zasilanych gazem kopalnianym, w przypadku eksploatacji silnika gazowego na gazie koksowniczym, ze względu na zakończenie eksploatacji tej jednostki, praca ograniczyła się do usystematyzowania problemów związanych z eksploatacją, wskazaniem newralgicznych czynników eksploatacyjnych wraz z wyartykułowaniem wniosków do przyszłej eksploatacji silników gazowych na tym paliwie. W przypadku silników pracujących na gazie kopalnianym analizie poddano sytuacje trudnych do zdiagnozowania sytuacji ruchowych w których silnik miał obniżoną dyspozycyjność. W tym przypadku analizowano archiwalne parametry pracy silników, a także analizowano zgromadzona dokumentację zdjęciową. Innym tematem tej pracy badawczej jest wskazanie, a nawet rekomendowanie jaki olej smarujący powinien być stosowany w układach smarowania silników gazowych. Badaniem objęto dwie jednostki tego samego typoszeregu, tego samego producenta. W ramach badania skupiono się na analizie parametrów oleju silnikowego. Wyciągnięte wnioski przyniosły odpowiedzi na pytanie związane z wpływem stosowanego oleju na trwałość i niezawodność silnika, a także wskazały kierunki działań mających na celu poprawę dyspozycyjności mocowej i ruchowej silników.
Access status: Open Access ,
Bilans energetyczny agregatu kogeneracyjnego zasilanego gazem kopalnianym
(Wydawnictwa AGH, 2024) Kalwar, Adam; Filipek, Roman; Madejski, Paweł; Pytel, Krzysztof; Kurdziel, Franciszek
This paper presents the results of a study of a gas engine heat recovery system in terms of efficient use of the energy contained in the fuel, with the study performed determining the most efficient variant of gas engine operation. A comparison between the manufacturer’s data and the performance results was also made. Simulations performed on the system model allowed the optimum engine load range to be determined. The results of the analyses also indicated which variant of the engine heat recovery system is the most effective.
Access status: Open Access ,
The energy balance of a CHP unit fuelled by mine gas
(Wydawnictwa AGH, 2024) Kalwar, Adam; Filipek, Roman; Madejski, Paweł; Pytel, Krzysztof; Kurdziel, Franciszek
This paper presents the results of a study of a gas engine heat recovery system in terms of efficient use of the energy contained in the fuel, with the study performed determining the most efficient variant of gas engine operation. A comparison between the manufacturer’s data and the performance results was also made. Simulations performed on the system model allowed the optimum engine load range to be determined. The results of the analyses also indicated which variant of the engine heat recovery system is the most effective.