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    Tytuł:
    Energy consumed by valves in conventional water systems and the application of a power-decentralization system
    Autorzy:
    Fu, Y.
    Cai, Y.
    Zhang, Z.
    Wu, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1955328.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska
    Tematy:
    power-centralized system
    power-decentralized system
    valves' power consumption
    valve
    Opis:
    The power consumption by valves of a conventional (i.e. power-centralized) water system is analyzed on the example of a water heating system in order to evaluate the extent of energy savings achievable in a power-decentralized system. The configuration and appli-cation of a power-decentralized system is briefly discussed.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2006, 10, 3; 311-320
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Capacity utilization level of freight electric locomotives and evaluation of expense reduction on consumed energy due to modernization
    Autorzy:
    Zarifyan, Alexandre
    Mustafin, Adel
    Valentseva, Elena
    Shapshal, Alexandre
    Powiązania:
    https://bibliotekanauki.pl/articles/2098188.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    freight electric locomotive
    discrete-adaptive control algorithm
    reduction of energy consumption
    modernization
    locomotive repair plant
    lokomotywa elektryczna towarowa
    dyskretno-adaptacyjny algorytm sterowania
    zmniejszenie zużycia energii
    modernizacja
    zakład naprawy lokomotyw
    Opis:
    The working conditions of freight electric locomotives with full-weight and empty-weight trains are analyzed. It is shown that due to the use of scalable traction power control technology (discrete-adaptive control algorithm), there is a possibility for more complete use of electric locomotive capacity and, accordingly, a significant increase in its energy efficiency. The main condition for the realization of this possibility is the presence of an individual per-axle traction control system. Corresponding changes in the construction of electric locomotives of previous years of production can be made during modernization as part of factory repair. The calculation of financial savings from the use of these proposals is presented.
    Źródło:
    Transport Problems; 2021, 16, 4; 6--14
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the working energy capacity of the on-board energy storage system of an electric locomotive for quarry railway transport during working with a limitation of consumed power
    Autorzy:
    Kondratieva, Liliia
    Bogdanovs, Arturs
    Overianova, Liliia
    Riabov, Ievgen
    Goolak, Sergey
    Powiązania:
    https://bibliotekanauki.pl/articles/27311785.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    railway transport
    electric locomotive
    energy storage system
    traction drive
    induction motor
    transport kolejowy
    lokomotywa elektryczna
    system magazynowania energii
    napęd trakcyjny
    silnik indukcyjny
    Opis:
    The use of specialized rail rolling stock which is used for transporting ore from the quarry to the crushing plant at mining enterprises is analyzed here. Electric locomotives with an asynchronous traction electric drive and an on-board energy storage system are considered for use. The calculated dependencies of the electric locomotive tractive power were analyzed and it was established that on flat sections of the track profile, the movement is carried out with a power that does not exceed 50% of the nominal one. The movement with the nominal power is carried out on the controlled uphill during the cargo half-passage. To ensure the necessary power for movement in such areas, the use of an on-board energy storage system is proposed, which should feed the traction system while limiting the power consumed from the catenary. This happens when the voltage on the pantograph drops to a minimum level. The aim of this work is to determine the on-board energy storage system parameters during the operation of the electric locomotive with limitation of the power consumed from the traction network. Mathematical models of the energy exchange processes in the electric locomotive traction system have been developed. The criteria for comparing options for calculating the parameters of the on-board energy storage system have been proposed. The criteria take into account the reduction of energy consumption during movement, the efficiency of energy storage, and the complete use of the on-board energy storage system in terms of power and working energy capacity. Based on the calculation results, it was determined that the use of an energy storage device with a power of 3,540 kW and an operating energy capacity of 63.5 kWh provides a 10% reduction in energy consumption, which is being consumed while moving along the sample section of the road. The current that can be consumed by an electric locomotive with such parameters of the on-board energy storage system is limited by 600 A.
    Źródło:
    Archives of Transport; 2023, 65, 1; 119--154
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement systems for the energy produced by a photovoltaic system and consumed by a building in the Lublin Science and Technology Park
    Systemy pomiaru energii produkowanej przez system fotowoltaiczny i pobieranej przez budynek Lubelskiego Parku Naukowo-Technologicznego
    Autorzy:
    Małek, Arkadiusz
    Powiązania:
    https://bibliotekanauki.pl/articles/408782.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    photovoltaic systems
    energy measurement
    energy management
    smart devices
    system fotowoltaiczny
    pomiar energii
    zarządzanie energią
    inteligentne urządzenie
    Opis:
    The article contains a description of systems for measuring the energy produced by the photovoltaic system and its consumption by a building. The photovoltaic system consists of two micro-installations supplying two parts of the Lublin Science and Technology Park. An internet platform for monitoring photovoltaic plant operation is presented. The power generated and the amount of electricity produced are assessed. Also, an innovative system for monitoring and analysing the consumption and production as well as the efficient use of electricity in individual parts of the building is described. Based on the measurements carried out, the production of energy exceeded its consumption in one part of the building.
    W artykule zawarto opis innowacyjnych systemów do pomiaru energii produkowanej przez system fotowoltaiczny oraz pobieranej przez budynek. System fotowoltaiczny składa się z dwóch mikroinstalacji zasilających dwa segmenty Lubelskiego Parku Naukowo-Technologicznego. Przedstawiono platformę internetową do monitoringu pracy systemu fotowoltaicznego. Dokonano oceny generowanej mocy oraz ilości produkowanej energii elektrycznej. Następnie opisano innowacyjny system do monitoringu, analizy zużycia i produkcji oraz efektywnego wykorzystywania energii elektrycznej w poszczególnych segmentach budynku.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2019, 9, 4; 87-92
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Supply of energy and selected nutrients in meals consumed by Moroccan students at home and on a university campus
    Autorzy:
    Elarbaoui, M.
    Jafri, A.
    Makhlouki, H.
    Ellahi, B.
    Derouiche, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/28765570.pdf
    Data publikacji:
    2022
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Opis:
    Background. Student life is often accompanied by changes in eating behavior. Adopting a balanced and varied diet and healthy eating habits can promote the health, growth and intellectual development of young people at different stages of life. According to the WHO, a healthy diet helps protect against all forms of malnutrition, as well as against noncommunicable diseases. The nutritional and energy intake must follow nutritional norms, for example energy intake must be adapted to expenditure. To avoid excessive weight gain, fat should not exceed 30% of total energy intake Objective. The goal of this study was to compare energy consumption, macronutrients and selected minerals in food rations consumed by students at university campus and at home. Materials and Method. The subjects were chosen at random from among volunteer students from Hassan II University in Casablanca. A sample of 130 students (54 women and 76 men) aged 18 to 25, participated in this study. Anthropometric measurements were performed to assess general characteristics, and records of one-day food intakes at university and at the parental home were performed by 24-hour food diary, and as well as conducting face-to-face. Variables were expressed as mean ± standard deviation (SD). The Kolmogorov–Smirnov test was used to check the normality of data. Results. In accordance with the body mass index classifications, 69.5% of male university students and 77.7% of female were in normal weight categories. The overweight classes were 25.1% and 5.6%, respectively, for men and women. Assessment of the energy and nutritional intakes of university and home meals shows that students consume more calories, protein, carbohydrates, sodium, potassium, and iodine at home than at university, but these contributions remain insufficient in relation to the RDAs. Students consume more fat, especially saturated fatty acids, at university than at home. More than half of students exceed the recommended daily recommendations for saturated fatty acids. Conclusion. These results indicate that a university students’ diet is influenced by their behaviors, attitudes, and knowledge. Hence the importance of nutrition education, based on what foods to consume rather than what foods to avoid, a societal issue that requires a multidisciplinary, multisectoral and culturally appropriate approach.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2022, 73, 3; 285-291
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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