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    Wyświetlanie 1-2 z 2
    Tytuł:
    Emissions from a medium-duty CRDI engine fuelled with diesel-biodiesel blends
    Autorzy:
    Duda, Kamil
    Wierzbicki, Sławomir
    Mikulski, Maciej
    Konieczny, Łukasz
    Łazarz, Bogusław
    Letuń-Łątka, Magdalena
    Powiązania:
    https://bibliotekanauki.pl/articles/2203846.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    biodiesel
    fuel blending
    exhaust emissions
    common-rail
    engine efficiency
    mieszanie paliw
    emisja spalin
    common rail
    sprawność silnika
    Opis:
    In the present work, biofuels produced from different raw fatty materials have been proposed as a dominant fuel component in biodiesel-diesel fuel blends. Biofuels were produced from pork lard and rapeseed oil by alkali transesterification using methyl alcohol. Blends of biofuels in volumetric proportions of 60 and 80% of the biocomponent and the remaining part of the conventional fuel were used in a compression ignition engine designed for medium-duty vehicles. The experiments were conducted at two engine rotational speeds (1500 and 3000 rpm, respectively) and a set of load conditions (50, 100, and 200 Nm, respectively). The tests focused on engine efficiency parameters (brake-specific fuel consumption and brake fuel conversion efficiency) as well as exhaust gas emissions (hydrocarbons, carbon monoxide, and carbon dioxide were determined). The obtained results indicate that blends containing biocomponents produced from pork lard were characterized by superior fuel consumption and efficiency results, compared to blends containing biocomponents produced from rapeseed oil. In terms of exhaust emissions, biocomponents produced from pork lard were also characterized by lower emission of all of the examined components compared to rapeseed methyl ester-diesel blends. This study proposes that fuel components obtained from custom (animal) raw-fatty material can be an effective substitute for commonly used rapeseed oil methyl esters.
    Źródło:
    Transport Problems; 2021, 16, 1; 39--49
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Capacity and Effectiveness of Screening People and Baggage with the Use of New Technologies: Standard C2
    Autorzy:
    Uchroński, Piotr
    Kozuba, Jarosław
    Letun, Magdalena
    Brzeska, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2174778.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
    Tematy:
    airport
    baggage security
    baggage control
    capacity
    effectiveness
    safety
    lotnisko
    ochrona bagażu
    kontrola bagażu
    przepustowość
    efektywność
    bezpieczeństwo
    Opis:
    One of the basic elements inseparably connected with air communication is the security control of persons and luggage which is performed by certified OKBs entered on the list of the President of the Polish CAA. An area of interest is the security check of hand baggage passengers take with them on board the aircraft. This control is carried out based on current legal regulations in the field of civil aviation security and is designed to detect prohibited and dangerous items hidden in the passenger's luggage specified in these legal acts. Due to the fact that the catalogue of these items is not included in an enumerative way, the security control operator assesses the possibility of using any item other than that specified in the document in terms of the possibility of making an act of unlawful interference. However, the skills of the security control operator are only one of the elements affecting the effectiveness of the security check being performed. The technical background and degree of technical sophistication are no less important in the control process. This paper aims to indicate possible organizational solutions to be applied in practice, which have a measurable impact not only on the effectiveness of the security control performed but also on the throughput at the security checkpoint, which in turn determines the operational readiness of the entire airport. The authors, through empirical studies carried out at airport security checkpoints equipped with different technical and technological solutions, quantitatively indicate the benefits of using new technologies and the possibility of choosing the organization of work at the security checkpoint, depending on the needs arising from the nature and number of flight operations.
    Źródło:
    Safety & Defense; 2022, 2; 72--81
    2450-551X
    Pojawia się w:
    Safety & Defense
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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