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    Wyświetlanie 1-3 z 3
    Tytuł:
    The Issues of Justice in Economic and Environmental Policy
    Autorzy:
    Górka, Kazimierz
    Thier, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/1964918.pdf
    Data publikacji:
    2021-08-20
    Wydawca:
    Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
    Tematy:
    cross-generational justice
    economic effectiveness versus economic efficiency
    income differentiation
    social justice
    social exclusion
    Opis:
    The article presents the gist, the kinds and manifestations of justice, with the discussion of the controversies around social justice. The analysis deals with the relationship between social justice and economic efficiency and effectiveness – especially in the environmental protection – as well as the concepts of international and cross-generational justice. In summary, the authors discussed inequality of income and the structure of welfare benefits as well as the scale of poverty and social exclusion in Poland.
    Źródło:
    Central European Economic Journal; 2021, 8, 55; 191-200
    2543-6821
    Pojawia się w:
    Central European Economic Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The development of long-range heat transfer surfaces for marine diesel engine charge air coolers
    Autorzy:
    Kuznetsov, Valerii
    Gogorenko, Oleksiy
    Kuznetsova, Svetlana
    Powiązania:
    https://bibliotekanauki.pl/articles/1818882.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    marine diesel engines
    charge air cooler
    heat transfer surface
    efficiency
    finns
    dimples
    nonround cross section tube
    Opis:
    Charge air cooling is essential for the efficient operation of marine diesel engines. This work presents the results of research on the characteristics of long-range heat transfer surfaces for marine diesel engines. Elliptical and flat-oval tubes were considered. This study was carried out using mathematical models that consisted of the equations for energy conservation, motion, continuity, and state. The RSM turbulence model was used to close the system of equations. To solve the resulting system of equations, the RANS approach was used, which was implemented in the software package Code Saturne with a free license and the SimScale cloud service. The mathematical model was verified by comparing the model results with the experimental results obtained using a prototype heat-exchange surface of a charge air cooler at a test bench. The discrepancy between the theoretical and experimental heat transfer coefficient α was ≤ 8.3%. An estimate of the compactness of smooth elliptical and flat-oval tube banks compared with round ones was carried out. A 19.6% increase in compactness was obtained for elliptical tubes and 17.5% for flat-oval tubes. Based on the profiled finning surfaces, it is possible to improve their thermohydraulic characteristics by up to 40% when using them together with elliptical tubes compared with round ones and up to 26% when using them with flat-oval tubes.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2021, 65 (137); 51-57
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature efficiency of heat exchangers in air handling units
    Autorzy:
    Michalak, Piotr
    Grygierczyk, Stanisław
    Powiązania:
    https://bibliotekanauki.pl/articles/95368.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    ventilation
    heat recovery
    rotary heat exchanger
    cross-flow heat exchanger
    temperature efficiency
    PN-EN 308
    wentylacja
    odzysk ciepła
    obrotowy wymiennik ciepła
    krzyżowy wymiennik ciepła
    sprawność temperaturowa
    Opis:
    In order to reduce ventilation heat loss and improve energy efficiency of low-energy buildings air-handling units (AHUs) with heat recovery are used. The article presents results of surveys performed in a passive building located in Katowice concerning the temperature efficiency of heat and cold recovery of two selected AHUs, with different heat exchangers. For this purpose the measurement data from the Building Management System (BMS) for the period 1.08.2015-31.07.2016 were used. The first unit was equipped with a rotary heat exchanger. Its average annual temperature efficiency of heat recovery was 47.2% annually. The efficiency of cold recovery amounted 52.9% on average for the warm half year. The second unit had a cross-flow exchanger. The average annual temperature efficiency of heat recovery in this device was 80.1%. The efficiency of cold recovery amounted 57.2% on average for the warm half year. Additional remarks concerning the temperature measurement in analysed units were also given.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2019, 3, 3; 267-272
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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