Autor: Chmielewski, A - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Modelling and simulation of repeated charging/discharging cycles for selected nickel-cadmium batteries
Autorzy:: Chmielewski, A.
Szurgott, P.
Powiązania:: https://bibliotekanauki.pl/articles/241905.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dynamic simulation
charging/discharging cycle
MATLAB Simulink
Opis:: The main aim of the paper is to present a developed methodology of simulation of the energy efficiency of a selected energy storage unit. The authors focused their actions on batteries that could be the base for an energy storage system possible to apply in a modernized hybrid-shunting locomotive. Three different nickel-cadmium batteries were selected as representatives for the study. Simulation was focused on repeated cycles of charging and discharging the batteries. The simulation model generally consists of three main components: a specified load cycle, a dynamic model of the DC electrical machine and a model of the Ni-Cd battery. The input data for the battery model is based mostly on the parameters provided by the manufacturer data sheets. However, an internal resistance had to be measured for each battery. Conducted simulations provided information about the electromotive force, state of charge, an average efficiency of the battery, as well as the temperature changes during the cycle. The proposed approach to the battery simulation can be also applied for the loading cycles similar to those that occur during the actual operation of the locomotive. The current study is a part of the project focused on modernization of the diesel-electric shunting locomotive to the hybrid one.
Źródło:: Journal of KONES; 2015, 22, 1; 55-62
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Research and simulation work of TEG in cogeneration task of the exhaust system
Autorzy:: Chmielewski, A.
Lubikowski, K.
Radkowski, S.
Szczurowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/246212.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: cogeneration of energy
exhaust system
thermoelectric generator
Opis:: One of the main directions of development of power transmission systems in vehicles involves improvement of energy efficiency of combustion engines, especially reduction of the loss related to waste heat in cooling and exhaust systems. The traditional role of the exhaust system is to remove exhaust gases from a combustion engine and muffle the noise created during the engine’s operation. Relevant distribution of temperatures along the entire length of the exhaust system is a very important element in such a complex structure. The examples could be the particulate solids filter or the converter which have to reach a relevant temperature to operate properly while the temperature’s growth is simultaneously restricted due to the limitations associated with the materials used. The research was conducted while using the ECOTEC 1.8 litre engine from Opel, the X18XE model. The engine was installed in a tested, in the mechatronic lab at the Faculty of Automotive and Construction Machinery Engineering (SIMR) of Warsaw University of Technology. The paper reviews the energy efficiency of TEG depending on deferent parameters of gas stream an weather conditions. This is original value of this paper. The results of the experiment are presented in the last section of the article.
Źródło:: Journal of KONES; 2013, 20, 2; 41-47
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Dynamic model of a crankshaft assembly with two degrees of freedom
Autorzy:: Chmielewski, A.
Bogucki, Ł.
Gumiński, R.
Mączak, J.
Powiązania:: https://bibliotekanauki.pl/articles/244367.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: distributed generation
dynamic model
crankshaft assembly
Opis:: Nowadays, growing attention is directed towards energy efficiency and issues related to respecting energy. An extremely vital role at improving energy efficiency plays the cogeneration technologies. In the 2012/27/UE Directive [1], the gas turbines [2] in combination with heat recovery, combustion engines [3, 4], steam engines [4], fuel cells [5-7], microturbines [8], Rankine organic cycle [9, 10], Stirling engines [11-15], and others, were included among cogeneration technologies, in which electric energy is produced from waste heat in the combined process. In this work, the distributed generation sources have also been addressed. From the perspective of the article herein, the sources equipped with the crankshaft assembly have been particularly emphasised. This mechanism converts chemical energy of, among others, fuel or working element into mechanical energy (the piston reciprocating motion is converted into rotary motion of a crankshaft). In this work, the physical model of the crankshaft assembly has been shown, with two degrees of freedom. On the basis of analysis of the physical model (with the static mass reduction), a single-piston simulation model has been developed of the crankshaft assembly, using the Matlab&Simulink software. On the basis of the analysis of the system, the motion equations have been derived, which served the purpose of building the simulation model. Because of the conducted simulations, the curves of displacement, velocity, and piston acceleration have been presented, and, respectively, the angular displacement, angular velocity, and angular acceleration of the crankshaft. The constructed model should be seen as a part of a multi-piston working mechanism in a, for example, Stirling engine.
Źródło:: Journal of KONES; 2015, 22, 3; 275-282
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Bench testing and simulation model of a cogeneration system with a stirling engine
Autorzy:: Chmielewski, A.
Gumiński, R.
Lubikowski, K.
Radkowski, S.
Szulim, P.
Powiązania:: https://bibliotekanauki.pl/articles/242327.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: Stirling engine
Alpha
Simulink
Sankey diagram
helium and nitrogen
cogeneration
Opis:: Cogeneration systems using a Stirling engine [2] are currently being developed and promoted by the European Union [1]. On the other hand, the EU climatic package obligates Polish energy producers to buy 100% CO2 emission rights from 2020 onwards. At that time, according to the experts a ton of CO2 could reach the price of 63.5 Euro. Attention is drawn to the fact that it is only then that nuclear power plants will become profitable, in the same way as wind power plants. This could result in substantial growth of energy prices, both for the economy and for households [3]. The paper presents the experimental research of a cogeneration system with a one-way Alpha type Stirling engine. The impact of the upper heat source and the type of working gas (helium and nitrogen) on the load capacity of the cogeneration system was studied. Based on a Sankey diagram, the power spread of the cogeneration system was analysed. On the basis of experimental research, a model was created of a cogeneration system consisting of the following submodels: Stirling engine of the second order, belt transmission, electric motor and an electrochemical battery. The Stirling engine was installed in a testbed, in the mechatronic lab at the Faculty of Automotive and Construction Machinery Engineering (SIMR) of Warsaw University of Technology. Furthermore, the impact of regenerator efficiency on the efficiency of the Stirling Engine was examined, which in turns impacts the efficiency of the entire cogeneration system.
Źródło:: Journal of KONES; 2013, 20, 3; 97-104
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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