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    Wyświetlanie 1-9 z 9
    Tytuł:
    Control of operability of Peltier modules in cooling systems based on the analysis of transient operating modes
    Autorzy:
    Kuzichkin, Oleg Rudolfovich
    Konstantinov, Igor Sergeevich
    Vasilyev, Gleb Sergeevich
    Surzhik, Dmitry Igorevich
    Powiązania:
    https://bibliotekanauki.pl/articles/1845461.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermoelectric system
    agriculture
    complex
    transients
    peltier effect
    identification algorithms
    Opis:
    The paper is devoted to the control of operability of Peltier modules based on the analysis of transient modes of their operation. Advantages of using low-power thermoelectric modules for the development of thermoelectric plants with adaptive control systems for the needs of the agricultural complex, which significantly reduce their cost characteristics, are shown. The problem of using the stationary mode of their operation, associated with the low efficiency of the modules, as well as the dynamic mode, associated with the presence of transient processes, is indicated. It is noted that overcoming this problem requires solution of the task of automation of reliability providing the well-known approaches to its solution are shown, for which the key advantages and disadvantages are given. An approach is proposed to complex control of the operability and quality of thermoelectric modules during their expluatation in three components of the physical process of thermoelectric conversion (Peltier thermoelectric effect, electrical and thermal transfer phenomena) by analyzing transients in the system based on identification algorithms. To justify it, the necessary equations and mathematical relations are given. Aprobating of the proposed approach was carried out experimentally by determining the time constants for operable and defective commercially available modules and showed its significant advantages over the standard verification procedure.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 2; 31-42
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Thermal analyses of exhaust system on combustion engine
    Autorzy:
    Dybała, J.
    Lubikowski, K.
    Rokicki, K.
    Szulim, P.
    Wikary, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/241765.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    cogeneration of energy
    exhaust system
    thermoelectric generator
    Opis:
    Nowadays there are more and more discussions on acquisition of energy from sources other than natural sources of energy. Many scientific research centres deal with the issue of energy recovery as well as use of energy from renewable sources. The communities associated with the automotive industry devote a lot of attention to the issue of improving the energy efficiency of vehicles. Since a combustion engine uses less than half of the energy produced during the combustion process, thus the issues of recovery of thermal energy and its conversion into electrical energy evoke increasing interest. The article presents the process of examination of the temperature of the exhaust system in a car engine operating in a laboratory environment. Measuring equipment was used to the temperatures' determine. Analysis of distribution of temperatures in the exhaust system creates grounds for rational selection of the places where the thermal energy recuperation systems should be installed. At present, the possibilities of recovery of thermal energy are still seriously restricted by the properties of the materials of which the elements of the thermal energy recovery systems are made. High propensity of these elements to thermal defects is a serious problem in practical application of these materials in thermal energy recovery systems. The results obtained in an experiment serve as the basis for determining the locations where thermoelectric generators should be installed while accounting for their thermal limitations.
    Źródło:
    Journal of KONES; 2012, 19, 4; 173-178
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy scavenging in a vehicles exhaust system
    Autorzy:
    Lubikowski, K.
    Radkowski, S.
    Szczurowski, K.
    Wikary, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/246763.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    cogeneration of energy
    exhaust system
    thermoelectric generator
    Opis:
    Present- day development of power transmission systems, especially the ones based on combustion engines, is trying to cope with the issue of improving the energy efficiency of energy processing systems. One of the directions is to use the techniques of thermal energy recovery from an engine's exhaust system. Vast part of the energy produced while burning the air- fuel mixture is lost in the cooling and exhaust systems. Research in this area was conducted by numerous teams, both abroad and in Poland, while focusing on use of Peltirea cells. The results of their research demonstrated small efficiency of these cells. In this paper, the authors have focused on modifications of the exhaust system in order to improve heat exchange between the exhaust system's elements and TEG. The research was conducted while using the ECOTEC 1.8 litre engine from Opel, the X18XE model. The 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. Spartan HE923 radiators were installed on the cold end of the module. The paper presents the results of the research related to interworking of TEG's with the exhaust system's heat-generating elements of various shapes. The paper reviews the energy efficiency of TEG depending on diverse parameters of gas flow. A parallel system has been assumed (controlled stream and pressure of the flowing exhaust gases without any interference as regards the speed of the of combustion engine). The factor-related experiment accounts for the influence that the pressure and temperature difference, depending on the volume and discharge of exhaust fumes, have on the efficiency of TEG for the same temperature. The results of the experiment are presented in the last section of the article.
    Źródło:
    Journal of KONES; 2012, 19, 3; 253-261
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of thermoelectric radiant cooling – photovoltaic panels system in the building
    Autorzy:
    Abdulghafor, Israa Ali
    Mnati, Mohannad Jabbar
    Powiązania:
    https://bibliotekanauki.pl/articles/2204065.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermoelectric panel
    cooling capacity
    numerical calculations
    PV system
    Opis:
    In this study, a theoretical model is presented to investigate the performance of a thermoelectric (TE) radiant cooling system combined with photovoltaic (PV) modules as a power supply in a building with an ambient temperature reaching more than 45◦C. The combined system TE/PV performance is studied under different solar radiation by using the hourly analysis program and photovoltaic system software. The thermal and electric characteristics of TE are theoretically investigated under various supplied voltages using the multi-paradigm programming language and numerical computing environment. Also, a theoretical analysis of heat transfer between the TE radiant cooling system and an occupied zone from the side, and the other side between the TE radiant cooling system and duct zone is presented. The maximum power consumption by TE panels and building cooling load of 130 kW is predicted for May and June. The 145 units of PV panels could provide about 50% of the power required by TE panels. The thermal and electric characteristics of TE panels results show the minimum cold surface temperature of 15◦C at a supplied voltage between 6 V and 7 V, and the maximum hot surface temperature of 62◦C at a supplied voltage of 16 V. The surface temperature difference between supplied current and supplied power increases as supplied voltage increases. At a higher supplied voltage of 16 V, the maximum surface temperature difference between supplied current, and supplied power of 150◦C, 3.2 A, and 48 W, respectively. The cooling capacity increases as supplied voltage increases, at a surface temperature difference of –10◦C and supplied voltage of 16 V, the maximum cooling capacity is founded at about 60 W. As supplied voltage decreases the coefficient of performance increases. The maximum coefficient of performance is about 5 at the surface temperature difference of –10◦C and supplied voltage of 8 V.
    Źródło:
    Archives of Thermodynamics; 2022, 43, 4; 85--108
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Ag2Te Addition on Thermoelectric Properties of Bismuth Telluride
    Autorzy:
    Drzewowska, Sylwia
    Lan, Tian-Wey
    Onderka, Bogusław
    Powiązania:
    https://bibliotekanauki.pl/articles/2048873.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermoelectric materials
    Seebeck coefficient
    resistivity
    thermal diffusivity
    Bi2Te3-Ag2Te system
    Opis:
    The resistivity, Seebeck coefficient and thermal diffusivity were determined for BiTe3 + Ag2Te composite mixtures. Subsequent measurements were carried out in the temperature range from 20 to 270°C, and for compositions from pure Bi2Te3 to xAg2Te = 0.65 selected along the pseudo-binary section of Ag-Bi-Te ternary system. It was found that conductivity vs. temperature dependence shows visible jump between 140 and 150°C in samples with highest Ag2Te content, which is due to monoclinic => cubic Ag2Te phase transformation. Measured Seebeck coefficient is negative for all samples indicating they are n-type semiconductors. Evaluated power factor is of the order 1.52·10-3 and it decreases with increasing Ag2Te content (at. %). Recalculated thermal conductivity is of the order of unity in W/(m K), and is decreasing with Ag2Te addition. Finally, evaluated Figure of Merit is 0.43 at 100°C and decreases with temperature rise.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 1; 5-15
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model geometryczny układu kogeneracyjnego opartego na silniku gazowym 1 MW
    Geometrical model of cogeneration system based on a 1 MW gas engine
    Autorzy:
    Chmielewski, A.
    Lubikowski, K.
    Mączak, J.
    Szczurowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/133523.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    kogeneracja energii
    układ odprowadzania spalin
    silnik spalinowy
    generator termoelektryczny
    cogeneration energy
    exhaust system
    combustion engine
    thermoelectric generator
    Opis:
    W poprzednim roku w grudniu został przyjęty przez Komisje Europejską nowy budżet programu operacyjnego "Infrastruktura i Środowisko", gdzie dla Polski przewidziane jest blisko 32mld Euro na inwestycje proekologiczne. Program ten skupia się na poprawie atrakcyjności naszego kraju oraz rozwoju efektywnych energetycznie technologii. Szczególnie ważne w tym kontekście stają się układy odzyskiwania energii i zwiększania efektywności transformacji energii przy jednoczesnym zmniejszeniu emisji zanieczyszczeń do środowiska. W dyrektywie europejskiej nr 2009/28/WE z kwietnia 2009 roku określono wymagania stawiane państwom członkowskim UE w sprawie promowania stosowania energii ze źródeł odnawialnych. W artykule Autorzy skupili się na zamodelowaniu geometrycznym układu kogeneracyjnego bazującego na silniku spalinowym zasilanym paliwem produkowanym z wysypiska śmieci. Autorzy zamodelowali geometrycznie układ odzyskiwania energii wykorzystujący ciepło odpadowe silnika (silnik gazowy), przekształcając je na energię elektryczną za pomocą termoelektrycznych generatorów (TEG - ang. thermoelectric generators), wykorzystujących technologię półprzewodnikową. W niniejszej pracy przedstawiono także wyniki badań temperaturowych na powierzchni silnika gazowego oraz układu odprowadzania spalin. Publikacja powstała dzięki finansowaniu z Urzędu Marszałkowskiego Województwa Mazowieckiego.
    In the previous year in December has been adopted by the European Commission a new budget for the Operational Programme "The Infrastructure and Environment", where for the Polish intended is close to 32mld Euro for environmental investment. This program focuses on improving the attractiveness of our country and the development of energy efficient technologies. Especially important in this context become the energy recovery systems and increase the efficiency of converting energy with simultaneously reducing emissions of pollutions to the environment. The European Directive 2009/28 / EC of April 2009 set out the requirements for the EU Member States on the case of the promotion of the use of energy from renewable sources. In the article Authors have focused on geometrical modelling of cogeneration system based on internal combustion engine powered by fuel produced from landfill. Authors was realise geometrically model of energy recovery system used waste heat from engine(Gas Engine), transforming them into electrical energy using a thermoelectric generator (TEG - called. Thermoelectric Generators) which use semiconductor technology. The pa-per presents the results of temperature tests on the surface of the gas engine and the exhaust system. This work is the result of the financial support from the Office of Mazovian Voivodeship Marshal.
    Źródło:
    Combustion Engines; 2015, 54, 3; 570-577
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The potential of thermoelectric energy harvesting in vehicles equipped with ICE
    Autorzy:
    Buchalik, Ryszard
    Rogozinski, Krzysztof
    Nowak, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/133341.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    combustion engine
    heat recovery
    thermoelectric module
    heat transfer
    exhaust system
    silnik spalinowy
    odzysk ciepła
    moduł termoelektryczny
    wymiana ciepła
    układ wydechowy
    Opis:
    The paper deals with an issue of waste heat recovery in a selected configuration of an internal combustion engine. A possibility of using thermoelectric cells (currently available on the market) for production of electricity with heat extracted from the exhaust gas was considered. The calculations were made using specialized software. Features and design assumptions of the heat recovery system were presented and their influence on parameters of the entire system was investigated (efficiency of the internal combustion engine, power, etc.). An assessment of the applicability of the energy recovery system based on thermoelectric effects and characteristic of the proposed configuration was performed. Some issues that require further research have been highlighted.
    Źródło:
    Combustion Engines; 2019, 58, 4; 70-74
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie ogniw Peltiera do budowy układów chłodzących w transporcie
    Use Peltier module of cooling systems for construction in transport
    Autorzy:
    Sadowski, E.
    Kowalik, R.
    Pniewski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/316784.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    ogniwo Peltiera
    zjawisko Peltiera
    moduł termoelektryczny
    elementy półprzewodnikowe
    układ chłodzący
    chłodzenie
    pojazdy samochodowe
    model matematyczny
    Peltier fuel cell
    Peltier's phenomena
    thermoelectric module
    semiconductor devices
    cooling system
    cooling
    motor vehicles
    mathematical model
    Opis:
    W artykule omówiono budowę modułów termoelektrycznych i zjawisko Peltiera. Położono nacisk na analizę zjawiska zachodzącego na elemencie półprzewodnikowym. Zaprezentowano także ułożenie ogniw w stos oraz model matematyczny wykorzystany do opracowania programów symulacyjnych. Przedstawiono również aktualne zastosowania ogniw oraz omówiono możliwości wykorzystania modułów Peltiera jako elementów chłodzących w transporcie.
    The article discusses the construction of thermoelectric modules and Peltier effect. Emphasis on the analysis of the phenomena occurring on the semiconductor element. Also presented configuration of cells in the stack and a mathematical model used to develop simulation programs. It also presents the current cell use, and discussed the possibility of using modules as a Peltier cooling elements in transport.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 12; 1335-1338
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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