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Wyszukujesz frazę "Kairouani, L." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Thermodynamic analysis of a new dual evaporator CO2 transcritical refrigeration cycle
    Autorzy:
    Abdellaoui, E. Y.
    Kairouani, L. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/240198.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CO2
    energy
    refrigeration
    ejector
    exergy
    energia
    chłodzenie
    ejektor
    egzergia
    Opis:
    In this work, a new dual-evaporator CO2 transcritical refrigeration cycle with two ejectors is proposed. In this new system, we proposed to recover the lost energy of condensation coming off the gas cooler and operate the refrigeration cycle ejector free and enhance the system performance and obtain dual-temperature refrigeration simultaneously. The effects of some key parameters on the thermodynamic performance of the modified cycle are theoretically investigated based on energetic and exergetic analysis. The simulation results for the modified cycle indicate more effective system performance improvement than the single ejector in the CO2 vapor compression cycle using ejector as an expander ranging up to 46%. The exergetic analysis for this system is made. The performance characteristics of the proposed cycle show its promise in dual-evaporator refrigeration system.
    Źródło:
    Archives of Thermodynamics; 2017, 38, 1; 39-62
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analysis of a new combined organic Rankine cycle and vapor compression cycle for power and refrigeration cogeneration
    Autorzy:
    Toujani, N.
    Bouaziz, N.
    Chrigui, M.
    Kairouani, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/175539.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    organic Rankine cycle
    cogeneration
    vapor compression cycle
    new combined
    Opis:
    Organic Rankine cycle (ORC) is considered the most used technology in low temperature heat recovery units for cogeneration (electricity and cold). In this study, the effect of the operating parameters, in particular the condensation and the vaporization temperatures on the performance of the cycle are analyzed. In addition, we developed a new combination of organic Rankine cycle and vapor compresion cycle systems to make cogeneration with a negative cold (-10–0◦C), as well with a positive cold (0–10◦C). Three configurations are examined and studied in terms of energy efficiency, namely the performance of each configuration including net power, refrigeration capacity and overall efficiency, the thermal efficiency for ORC and the coefficient of performance for VCC. The used working fluids are n-hexane for the ORC and R600 for the VCC. We also try to apply this new system to have the cogeneration with congelation temperatures. The results show that, for cogeneration with negative cold, among the three configurations that we have developed, the cycle with recovery is preferable in which it has a better energy performance. For a hot spring of 1000 kW, this cycle can provide simultaneously, a maximum net work of 17 kW and a maximum net cooling capacity of 160 kW and an overall coefficient of the order of 0.3. For the production of positive cold, among the three configurations that we have developed, the basic cycle (without recovery) is the most suitable. With the same source of heat a maximum net work of 65 kW and a net cooling capacity in the order of 1000 kW with a global coefficient in the order of 1.05 is obtained. Our system is not only limited to be exploited for a temperature range between -10 ◦C and 10 ◦C, but can also be used with other fluids for lower temperatures (congelation temperatures).
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2018, 140; 39-81
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid cascade refrigeration systems for refrigeration and heating
    Autorzy:
    Megdouli, K.
    Ezzaalouni, Y.
    Nahdi, E.
    Mhimid, A.
    Kairouani, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/240448.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ejector cycle
    heat pump
    comparison
    refrigerant
    coefficient of performance
    irreversibility
    exergy loss
    second law efficiency
    pompa ciepła
    porównanie
    czynnik chłodniczy
    współczynnik
    efektywność
    nieodwracalność
    Opis:
    In this study a cooling ejector cycle coupled to a compression heat pump is analyzed for simultaneous cooling and heating applications. In this work, the influence of the thermodynamic parameters and fluid nature on the performances of the hybrid system is studied. The results obtained show that this system presents interesting performances. The comparison of the system performances with hydrofluorocarbons (HFC) and natural fluids is made. The theoretical results show that the a low temperature refrigerant R32 gives the best performance.
    Źródło:
    Archives of Thermodynamics; 2018, 39, 2; 73-95
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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