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Tytuł:
Próby optymalizacjji parametrów energetycznych okien. Część 2 – dotychczas wykonane próby optymalizacji i autorski plan eksperymentu
The trials of optimization of thermal parameters of the windows. Part 2 – the carried out trials of optimization and original experiment’s plan
Autorzy:
Borowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/134819.pdf
Data publikacji:
2017
Wydawca:
ADVSEO
Tematy:
windows
energy balance
optimization
Opis:
The paper presents trials of optimization of both energetic and technical parameters of windows that were carried out and described in the literature. In addition, the author presented her original plan of the experiment, an ultimate goal of which is the optimization of thermal parameters of windows. As a result of the calculations, there is a possibility of combining different variants of the energy balance for the fragment of the outer wall with a window.
Źródło:
Technical Issues; 2017, 1; 22-27
2392-3954
Pojawia się w:
Technical Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of energy demand in a territorial government unit - methodological problems
Szacowanie zapotrzebowania na energię jednostki terytorialnej - problemy metodyczne
Autorzy:
Kowalczyk-Juśko, A.
Kościk, B.
Powiązania:
https://bibliotekanauki.pl/articles/2051742.pdf
Data publikacji:
2017
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
energy balance
energy demand
energy consumption
methodology
Opis:
Subject and purpose of work: The aim of the study is to identify methodological problems, which may be encountered during the preparation of the energy balance of a territorial unit, along with indications of ways to solve them. Materials and methods: Problems were identified during the preparation of the energy balance for two selected rural communes and then they were investigated with reference to the literature on this subject. Results: Estimating the energy demand of a local government unit requires proper identification of the groups of energy consumers, divided into facilities owned or co-owned by communes and ones independent from commune authorities. The latter group is divided further, into households, businesses, farms. For each of the users different methods of obtaining data may be needed: a survey and analysis of statistical data, analysis of financial documents, evaluation of the buildings’ age. Generally, however, preparing an energy balance statement requires many simultaneous approaches, and the combination of multi-criterion analysis provides the most reliable picture of the problem. Conclusions: The scope of the data needed to compile an energy balance statement for local government units, depends on the purpose of the developed analysis. Methodological handbooks and training materials on this subject are helpful, but the developed methodologies may need to be modified and adapted to specific conditions.
Przedmiot i cel pracy: Celem pracy jest wskazanie problemów metodycznych, na jakie napotkać można podczas sporządzania bilansu energetycznego jednostki terytorialnej, wraz ze wskazaniami sposobów ich rozwiązania. Materiały i metody: Problemy zidentyfikowano podczas sporządzania bilansu energetycznego dwu wybranych gmin wiejskich, a następnie skonfrontowano z literaturą przedmiotu. Wyniki: Oszacowanie zapotrzebowania na energię w jednostce samorządu terytorialnego wymaga właściwego określenia grup odbiorców energii w podziale na obiekty będące własnością lub współwłasnością gminy oraz niezależne od władz gminy. Druga grupa dzieli się dalej, na gospodarstwa domowe, przedsiębiorstwa, gospodarstwa rolne. Dla każdej z grup odbiorców mogą być potrzebne odmienne metody pozyskania danych: badanie ankietowe, analiza danych statystycznych, analiza dokumentów finansowych, ocena wieku budynków. Najczęściej jednak sporządzenie bilansu energetycznego wymaga stosowania wielu podejść równocześnie, a połączenie wyników analizy wielokryterialnej daje najbardziej rzetelny obraz badanego problemu. Wnioski: Zakres danych, potrzebnych do sporządzenia bilansu energetycznego jednostki samorządu terytorialnego, zależy od celu opracowania analizy. Poradniki metodyczne i materiały szkoleniowe na ten temat są pomocne, jednak opracowane metodyki mogą wymagać modyfikacji i dostosowania do konkretnych warunków.
Źródło:
Economic and Regional Studies; 2017, 10, 3; 5-16
2083-3725
2451-182X
Pojawia się w:
Economic and Regional Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Glacio−meteorology of Ebbabreen, Dickson Land, central Svalbard, during 2008–2010 melt seasons
Autorzy:
Małecki, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/2049629.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
glacier
meteorology
energy balance
Źródło:
Polish Polar Research; 2015, 2; 145-161
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ionizing radiation as a component of energy balance in electrical discharges in air and mineral oil
Autorzy:
Nagi, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/114669.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
ionizing radiation
electrical discharges
scintillator
energy balance
Opis:
The paper presents the results of research concerning electrical discharges generating ionizing radiation in air and oil. Ionizing radiation is an important component of energy balance in electrical discharges. In energetics and all other engineering sciences, the energy balance shows the flow of energy for a given technological process. Within it, the energy needs of the process and its effect are collated.
Źródło:
Measurement Automation Monitoring; 2016, 62, 4; 146-148
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of computer equipment for power demand and consumption of electricity in companies
Autorzy:
Dobrzycki, A.
Powiązania:
https://bibliotekanauki.pl/articles/97632.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
electricity consumption
power demand
computers
energy balance
Opis:
This paper concerns the analysis of power and energy consumption of computer workstations in companies. The following cases were analyzed: the position with the desktop computer the position with mobile workstation and the position with the laptop. We compared demanded power and electricity consumption of such posts pointed out advantages and disadvantages of the use of the above types of computer workstations in the context technical (electricity use) and economically.
Źródło:
Computer Applications in Electrical Engineering; 2014, 12; 246-253
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of the energy balance of the engine powered by diesel oil mixture with butanol
Autorzy:
Sitnik, L. J.
Andrych-Zalewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/247462.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engine
fuels
dense alcohols
energy balance
Opis:
The development of motorisation involves using bigger amounts of fuels. These fuels are, until now, mainly petroleum. However, the fuels of bio origin must be used as well. It follows from the necessity of ensuring CO2 balance and from the fact that oil sources sooner or later will become exploited. Not less important is the fact that, principally, it is difficult to change the proportions of petrol and diesel oil extracted from crude oil, and the use of diesel oil increases proportionally faster than petrol. Therefore, it is necessary to use bio additives in diesel oil. One of such additives is dense alcohols. The aim of the present work is to determine the energy balance of diesel engine powered by diesel oil and butanol mixture. The work field includes making of energy balance of the engine in its characteristic points responsive 13 phase ESC test as well as determining on this basis the consolidated values concerning the differences in the engine energy balance. It has been proved, that powering the engine by mineral diesel oil with doped butanol (20% v/v) does not lead to essential differences in the energy balance of the engine- which does not mean, that the essential differences are absent in the particular characteristic points of the engine. It requires more detailed explanation (in the further research works) because losses in the combustion process do not show differences, but in the other balance components the differences are shown.
Źródło:
Journal of KONES; 2015, 22, 4; 269-273
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy balance in self-powered MR damper-based vibration reduction system
Autorzy:
Snamina, J.
Sapiński, B.
Powiązania:
https://bibliotekanauki.pl/articles/202332.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
MR damper
electromagnetic generator
vibration
energy balance
Opis:
The study is focused on the energy balance in self-powered vibration reduction system with a linear magnetorheological (MR) damper. The mathematical model of the vibration reduction system is outlined and numerical simulation data are provided. The model involves the mechanical and electrical sub-systems of the electromagnetic generator and an MR damper. For the purpose of the numerical simulations, the parameters of the model were identified through experiments. The objective of the simulations was to establish the energy balance of the system. Energy fluxes associated with energy inputs and outputs as well as a rate of change of inertial energy were determined.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 1; 75-80
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of a Winter Garden on Energy Consumption of a Detached Passive House
Autorzy:
Stolarska, Agata
Kurtz-Orecka, Karolina
Mielnikiewicz, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/123511.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
passive construction
winter garden
solar profit
energy balance
Opis:
This paper addresses the effect of a winter garden in a passive detached house on its energy parameters. In order to carry out the study, it was necessary to design a dwelling building compliant with the passive construction standards. The house was designed as a detached two-storey building with a pitched roof and no basement, constructed using traditional brick structure of double-layer walls. The building was intended for construction in north-western Poland, Central Europe, in Pomerania Region. Compliance with the requirements of passive building standards allowed for the use of a buffer zone in the form of a winter garden. Within the project, the garden was designed as an enclosed unconditioned area located at the southern side of the living room. In the winter garden, there are ventilation openings and air inlets intended stay closed during the autumn-winter season. However, in the summer months, they are necessarily opened to provide air circulation. This solution will help to avoid overheating and achieving tropical temperatures inside the garden in the summer. Additionally, there are white venetian blinds used on the garden’s vertical outside walls and colourful roof marquise. For the purpose of the study, a winter garden was designed in the form of a 4.36 m x 3.03 m rectangle with a pent roof and slope inclination of 25°. Its design is based on a mullion and transom facade system. It consists of 50 mm wide profiles and double-glazed windows. The calculations related to the energy balance were performed for the two adopted variants. The heat gains and losses as well as dynamic parameters and heat demand were evaluated. It was found that the winter garden has no significant influence on the temperature conditions in the building. This applies primarily to a small part of the facade to which it is adjacent. In addition, the effect of the adopted monthly calculation methodology on the obtained parameters was shown. In general, the addition of a winter garden to the building reduced the overall demand for space heating and ventilation in the heated area during the year by more than 30%. In the case of the second variant, the duration of the heating period was also reduced by almost 230 hours. This also resulted in lower annual primary, final and usable energy demand values. Finally, it was demonstrated that a winter garden has a positive effect on the energy balance of a building in climate of north part of Central Europe.
Źródło:
Journal of Ecological Engineering; 2019, 20, 10; 146-154
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy balance of a vehicle equipped with hybrid propulsion system fuelled with alternative fuels
Autorzy:
Karczewski, Mirosław
Szczęch, Leszek
Polak, Filip
Powiązania:
https://bibliotekanauki.pl/articles/243575.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy balance
unmanned vehicle
hybrid transmission
test stand
Opis:
Article presents the energetic balance of small-unmanned vehicle hybrid power transmission. The vehicle equipped with serial hybrid transmission consisted of electric engines connected to the battery pack and small Diesel power generator. In mentioned construction, battery is used as energy buffer and combustion engine is used more as emergency power supply, and is turned on when battery is depleted. In other condition, power generator can be turned off, without reducing power of transmission parameters, except its range. Vehicles with hybrid drive are very common chosen vehicles by users. More and more often, we also talk about searching for replacement fuels for internal combustion engines, so also for those with hybrid drive. The research was carried out on an unmanned land platform equipped with a hybrid propulsion system supplied as standard with Diesel oil. The article presents the problems of comparing the efficiency of a hybrid vehicle fuelled with Diesel oil, but also with alternative fuels based on kerosene and other components. For test, three types of fuels were used, standard Diesel oil, F-34 and with experimental mixture of Jet A-1 fuel with 10% of 2-ethylhexanol. Energy used for charging of the battery, from tank-to-wheel, was calculated. This also enables to calculate total efficiency of such hybrid power transmission, powered with different fuels.
Źródło:
Journal of KONES; 2019, 26, 4; 91-96
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transformation of energy balances with dominant coal consumption in European economies and Turkey in the years 1990-2017
Autorzy:
Jonek-Kowalska, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/19094471.pdf
Data publikacji:
2019
Wydawca:
Instytut Badań Gospodarczych
Tematy:
energy balance
European economies
links between energy policy and economy
Opis:
Research background: Energy policy is closely linked to economic development. Therefore, its optimization is an important issue especially in the contemporary European environmental conditions.  EU regulations enforce a reduction of carbon dioxide emissions and the abandonment of non-renewable energy resources. Instead, they promote renewable energy sources. In this way, new legal and environmental circumstances are becoming the main reason for the transformation of energy balances, which is a real economic and technological challenge. This transformation requires a strategic and effective approach, especially in those countries which until now have used mainly hard coal in the energy sector. Purpose of the article: According to above justification, the main purpose of the article is to identify the strategies for the transformation of energy balances that were implemented in the years 1990-2017 by chosen European countries and Turkey. Methods: The study period covers the years 1990-2017, and the subject of the research at first applies to all European countries, and then to 7 countries selected due to their high share of bituminous coal in energy balance in the first year of the analysis, treated as the initial point of transformation (1990). As a result of this selection, 6 EU members and Turkey with the largest share of coal in energy production in the year 1990 are examined. Particularly, an analysis of the trends in their energy balances in the years 1990-2017 is conducted. The research uses data on non-renewable energy consumption and renewable energy resources and the total energy consumption. The research methodology includes: analysis of the structure and dynamics, evaluation of trends and comparative analysis and presentation of development strategies. At the end of the article, a comparative analysis is carried out, the economic consequences of identified changes are assessed, and recommendations are formulated aimed at optimizing the structure of the energy balance in the future. Findings & Value added: Generally, there are four theoretical and empirical patterns of transformation strategies of energy balances with dominant coal consumption: 1) using other non-renewable energy resources; 2) replacing non-renewable energy resources with renewable ones; 3) using nuclear energy instead of coal; 4) increasing coal consumption as available and efficient energy resource. It was found that the examined countries implement mainly the strategy in which the decreasing share of coal is made up for by an increasing share of gas. Additionally, we can observe an increase in the share of nuclear energy in France, the Czech Republic and the United Kingdom. In Spain and Germany, despite the use of nuclear power plants for the production of energy, the share of nuclear energy in the energy balances has systematically decreased in time. In all analyzed countries, we can also observe an increasing share of renewable sources in energy balances, however, this growth is very slow.
Źródło:
Oeconomia Copernicana; 2019, 10, 4; 627-647
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ehnergeticheskaja model' processa ul'trazvukovogo raspylenija v tonkom sloe
Energy model process of ultrasound spraying in a thin layer
Autorzy:
Ljashok, A.
Jakhno, O.
Lugovskojj, A.
Powiązania:
https://bibliotekanauki.pl/articles/76881.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
ultrasonic spraying
energy model
thin layer
analytical expression
energy balance
Opis:
The offered chart of charges of energy is during realization of process of ultrasonic spraying in a thin. Well-grounded and described energies which acting on thin layer of liquid at ultrasonic spraying, and extended described components of existing energy. Analytical expressions are resulted for the involved energies. The presented balance of energies in the process of ultrasonic spraying.
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prospects for the use of LNG terminals to meet the demand for natural gas in the EU
Perspektywy wykorzystania terminali LNG do pokrycia zapotrzebowania na gaz ziemny w UE
Autorzy:
Janusz, P.
Kaliski, M.
Powiązania:
https://bibliotekanauki.pl/articles/283013.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
natural gas
LNG
energy balance
gaz ziemny
bilans energetyczny
Opis:
In recent years, changes have been made in the structure of primary energy use in the European Union In addition, a reduction in the use of primary energy has also been observed. According to the forecasts of the International Energy Agency, the European energy market will be subject to further changes in the perspective of 2040. These may include the reduction of the energy consumption and the change in the structure of the energy balance as a result pro-ecological activities. Natural gas will be the only fossil energy carrier whose role in covering the energy demand will not change. Along with the changes taking place in the European energy market, global changes can also be observed. The EU Member States will continue to strive to diversify natural gas supplies. One of the main elements of diversification of natural gas supplies is the use of LNG regasification terminals. The reasons for that include the increasing production of natural gas, particularly in the case of unconventional deposits, the ongoing development of liquefaction terminals, and, as a consequence, an increase in the LNG supply in the global market. The article presents the utilization of regasification terminals in the EU Member States and plans for the development of LNG terminals. Europe has the opportunity to import natural gas through LNG terminals. However, until now, these have been used to a limited extent. This may indicate that in addition to diversification tasks, terminals can act as a safeguard against interruptions in gas supplies.
W ostatnich kilu latach miały miejsce zmiany w strukturze użycia energii pierwotnej w Unii Europejskiej, zanotowano także jej zmniejszenie. Zgodnie z prognozami przedstawianymi przez Międzynarodową Agencję Energii w perspektywie do 2040 roku, europejski rynek energetyczny będzie podlegał dalszym zmianom. Należy tutaj wymienić redukcję zużycia energii oraz zmianę struktury bilansu energetycznego na skutek prowadzonych działań proekologicznych. Gaz ziemny będzie jedynym kopalnym nośnikiem energii, którego udział pokryciu zapotrzebowania na energię się nie zmieni. Wraz ze zmianami zachodzącymi na europejskim rynku energii obserwować można globalne zmiany. Państwa członkowskie UE dążyć będą w dalszym ciągu do dywersyfikacji dostaw gazu ziemnego. Jednym z głównych elementów dywersyfikacji dostaw gazu ziemnego jest wykorzystanie terminali regazyfikacyjnych LNG. Z uwagi na fakt, że wzrasta wydobycie gazu ziemnego, w szczególności ze złóż niekonwencjonalnych, następuje rozwój instalacji skraplających, a w konsekwencji wzrost podaży LNG na globalnym rynku. W artykule został przedstawiony stopień wykorzystania terminali regazyfikacyjnych w państwach UE oraz plany dotyczące rozbudowy terminali skraplających. Europa posiada znaczne możliwości importu gazu ziemnego poprzez terminale LNG, jednak do tej pory wykorzystywane one były w ograniczonym zakresie. Świadczyć to może, że oprócz zadań dywersyfikacyjnych, terminale stanowią zabezpieczenie na wypadek przerw w gazociągowych dostawach gazu.
Źródło:
Polityka Energetyczna; 2018, 21, 3; 69-80
1429-6675
Pojawia się w:
Polityka Energetyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogen in energy balance – selected issues
Wodór w bilansie energetycznym – wybrane zagadnienia
Autorzy:
Mirowski, T.
Janusz, P.
Powiązania:
https://bibliotekanauki.pl/articles/394463.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
hydrogen
energy balance
power-to-gas
wodór
bilans energetyczny
Opis:
Energy from different sources is fundamental to the economy of each country. Bearing in mind the limited reserves of non-renewable energy sources and the fact that their production from new deposits is becoming less economically viable, attention is paid to alternative energy sources, particularly those that are readily available or require no substantial financial investment. One possible solution may be to generate hydrogen, which will then be used for heat (energy) production using other methods. At the same time, these processes will be characterized by low emission levels compared to conventional energy sources. In recent years, more and more emphasis has been placed on the use of clean energy from renewable sources. New, more technically and economically efficient technologies are being developed. The energy use worldwide comes mostly from fossil fuel processing. It can be observed that the share of RES in global production is growing every year. At the end of the 1990s, the share of renewable energy sources was at 6–7%. Global trends indicate the increasing demand for renewable energy due to its form. Global hydrogen resources are practically inexhaustible, but the problem is its availability in molecular form. The article analyzed the use of hydrogen as a fuel. The basic problem is the inexpensive and easy extraction of hydrogen from its compounds; attention has been paid to water, which can easily be electrolytically decomposed to produce oxygen and hydrogen. Hydrogen generated by electrolysis can be stored, but due to its physicochemical properties, it is a costly process; therefore, a decision was made that it is better to store it with natural gas or use it for further reaction. In addition, hydrogen can be used as a substrate for binding and converting the increasingly problematic carbon dioxide, thus reducing its content in the atmosphere.
Energia z różnych źródeł ma zasadnicze znaczenie dla gospodarki każdego kraju. Mając na uwadze ograniczone zasoby nieodnawialnych źródeł energii oraz fakt, że ich produkcja z nowych złóż staje się mniej opłacalna, zwraca się uwagę na alternatywne źródła energii, szczególnie te, które są łatwo dostępne lub nie wymagają znacznych inwestycji finansowych. Jednym możliwym rozwiązaniem może być wytwarzanie wodoru, który będzie następnie wykorzystywany do produkcji ciepła (energii) za pomocą innych metod. Jednocześnie procesy te będą charakteryzować się niskim poziomem emisji w porównaniu do konwencjonalnych źródeł energii. W ostatnich latach coraz większy nacisk kładzie się na wykorzystanie czystej energii ze źródeł odnawialnych. Trwają prace nad nowymi, wydajniejszymi technicznie i ekonomicznie technologiami. Ogólnoświatowe zużycie energii pochodzi głównie z przetwarzania paliw kopalnych. Można zaobserwować, że udział OZE w globalnej produkcji rośnie z każdym rokiem. Pod koniec lat dziewięćdziesiątych ubiegłego wieku udział odnawialnych źródeł energii kształtował się na poziomie 6–7%. Wskazują na to globalne trendy, zwiększając zapotrzebowanie na energię odnawialną ze względu na jej formę. Globalne zasoby wodoru są praktycznie niewyczerpane, ale problemem jest dostępność w postaci molekularnej. W artykule analizowano wykorzystanie wodoru jako paliwa. Podstawowym problemem jest tania i łatwa ekstrakcja wodoru z jego związków; zwrócono uwagę na wodę, którą można łatwo rozłożyć elektrolitycznie w celu wytworzenia tlenu i wodoru. Wodór generowany przez elektrolizę może być przechowywany, ale ze względu na jego właściwości fizykochemiczne jest to kosztowny proces; dlatego zdecydowano, że lepiej jest przechowywać go za pomocą gazu ziemnego lub użyć go do dalszej reakcji. Ponadto wodór może być stosowany jako substrat do wiązania i przekształcania coraz bardziej problematycznego dwutlenku węgla, zmniejszając w ten sposób jego zawartość w atmosferze.
Źródło:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2018, 102; 51-64
2080-0819
Pojawia się w:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light two-wheeled electric vehicle energy balance investigation using chassis dynamometer
Autorzy:
Racewicz, Szymon
Kazimierczuk, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/1837923.pdf
Data publikacji:
2020
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
electric vehicle
energy balance
chassis dynamometer
drive system efficiency
Opis:
The article presents the methodology for light two-wheeled electric vehicle energy balance investigation using MAHA LPS 3000 chassis dynamometer. For this purpose, the laboratory tests, as well as the road tests, have been performed on the self-constructed light two-wheeled electric vehicle equipped with the 3 kW BLDC motor and the 100.8 V battery pack. The road test data have been used to set up the dynamometer parameters in order to simulate the real road drive taking into account, among others, the rolling resistances and the air drag coefficient. The overall energy consumption for the laboratory tests and the road conditions’ tests have been then compared for different vehicle speeds. In addition, based on the power and the torque characteristics measured on the MAHA chassis dynamometer, the efficiency of the vehicle electric drive system and the efficiency of the battery charging process have been calculated.
Źródło:
Acta Mechanica et Automatica; 2020, 14, 4; 175-179
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical model and measurements of a combi-steamer condensation hood
Autorzy:
Tokarski, Mieszko
Ryfa, Arkadiusz
Buliński, Piotr
Rojczyk, Marek
Ziarko, Krzysztof
Nowak, Andrzej J.
Powiązania:
https://bibliotekanauki.pl/articles/240444.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy balance
heat transfer
heat exchanger
condensation
condensation hood
Opis:
Combi-steamer condensation hoods are widely used in modern gastronomy. They condense steam produced by the combi-steamer and also filter solid particles, moisture, grease and smells. All these factors negatively affect the staff and dishes, so efficient work of the condensation hoods becomes important. A mathematical and experimental analysis of such a device is described in this paper. First a measurement methodology was designed and measurements of air humidity, temperature and mass flow rates were performed. The measurement procedure concerned dedicated a steam generator and combi-steamer. Next a mathematical model was developed. It was based on mass and energy balances of the condensation hood. The condensate flow rate turned out to be insufficient to fulfill the energy balance while measured directly. Hence, it was calculated from heater’s power of the steam generator and the balance model was validated. The combisteamer had an unknown output, so the condensate flow rate was provided by the balance model after its validation. A preliminary diagnosis of the device was carried out as well.
Źródło:
Archives of Thermodynamics; 2020, 41, 1; 125-149
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
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