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    Wyświetlanie 1-2 z 2
    Tytuł:
    Design and Simulation of Cyclic Battery Tester
    Autorzy:
    Bilansky, Juraj
    Lacko, Milan
    Powiązania:
    https://bibliotekanauki.pl/articles/1193855.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    battery
    cell
    charging
    discharging
    Simscape
    Opis:
    The paper presents an approach to the modelling of a cyclic battery tester and contains observations about lithium-ion (Li-ion) batteries, charging/discharging procedures, conditions and protections which must be observed during the testing process. The main goal was to create and simulate a schematic which will be capable of cyclically testing Li-ion battery cells. Regulation of the final schematic is based on cascade connections of operation amplifiers, which work as a voltage source with current-limiting functions. The power part is created by two MOSFETs connected as a half-bridge. This topology allows current to flow in both directions (from and to the battery). Final simulation is supplemented by protections such as reverse polarity protection, short circuit protection and overvoltage protection during charging. Proper operation of the whole connection is demonstrated by the simulation outputs in the final section.
    Źródło:
    Power Electronics and Drives; 2020, 5, 40; 229-241
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Charging and Discharging Process of PCM with Paraffin and $Al_2O_3$ Additive Subjected to Three Point Temperature Locations
    Autorzy:
    Kumar, Sunil K.
    Muniamuthu, Sumathy
    Mohan, A.
    Amirthalingam, P.
    Anbu Muthuraja, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027798.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    paraffin wax
    charging
    discharging
    solar heater
    three point locations
    PCM material behavior
    methods of charging
    methods of discharging
    Al₂O₃
    Opis:
    This analysis focused on investigating thermal storage behaviour on phase change material along with $Al_2O_3$ as an additive. The experimental investigation was performed by three set temperature points, i.e. 40 °C, 50 °C and 60 °C with the mass circulation rate through the tank of 5 kg/min, 3 kg/min and 2 kg/min. The forced circulation method was used to circulate the liquid, water was used as a working medium and $Al_2O_3$ as nano particle. Paraffin acts a phase change material to conduct the experimental procedure. The combination of paraffin with $Al_2O_3$ improves the latent heat storage of the material. The performance, with respect to charging and discharging of the material, was investigated and it was observed that the temperature location point of 50 °C shows the best results in terms of charging and discharging phenomena, compared to other two temperature location points. During the process of charging, the maximum rate of heat transfer can be achieved by $Al_2O_3$ nanofluids. Paraffin along with $Al_2O_3$ are characterized by the best thermal storage behaviour during the latent heat storage at charging process and dissipation of heat during discharge process. The rapid cooling comparison for three set location points has been studied and best solidification was achieved at the point of 60 °C; this is due to the rapid cooling at higher elevation temperatures. The energy that was stored in thermal form is to be transferred with the aid of heat exchanger, a special type heat exchanger employed in this analysis to transfer the heat. From this analysis it is concluded that paraffin with $Al_2O_3$ are characterized by the best performance in terms of the charging and discharging phenomenon.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 2; 34-42
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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