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Wyszukujesz frazę "Gopinath, A." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Environmental emissions and efficiency of a direct injection diesel engine fueled with various fatty acid methyl esters
    Autorzy:
    Sairam, K.
    Gopinath, A.
    Velraj, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/207516.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    direct injection
    brakes
    carbon monoxide
    cottonseed oil
    diesel engines
    efficiency
    engines
    fatty acids
    fuels
    direct injection diesel engines
    environmental emissions
    exhaust gas temperature
    fatty acid methyl ester
    wtrysk bezpośredni
    hamulce
    tlenek węgla
    olej z nasion bawełny
    silniki wysokoprężne
    wydajność
    silniki
    estryfikacja
    estry
    kwasy tłuszczowe
    zużycie paliwa
    paliwa
    emisje gazów
    silniki wysokoprężne z wtryskiem bezpośrednim
    estry metylowe kwasów tłuszczowych
    Opis:
    Environmental emissions and efficiency of a direct injection diesel engine fueled with fatty acid methyl esters (FAMEs) have been experimentally investigated and compared with petro-diesel. Rubber seed oil methyl ester, cotton seed oil methyl ester, neem oil methyl ester, and mahua oil methyl ester were used as fuels. The brake specific fuel consumption, brake thermal efficiency, and exhaust gas temperature, nitrogen oxides, carbon monoxide, hydrocarbons, and smoke emissions were investigated. Mahua oil methyl ester exhibits higher brake thermal efficiency compared to other FAMEs. The NOx was found to be higher, while CO, HC, and smoke emissions of rubber seed oil methyl ester were lower than the other fuels at all loads.
    Źródło:
    Environment Protection Engineering; 2015, 41, 1; 125-135
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative study on environmental emissions and performance of a stationary type diesel engine fuelled with biodiesels derived from two different feedstocks
    Autorzy:
    Sairam, K.
    Gopinath, A.
    Velraj, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/207424.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    biodiesel
    biopaliwo
    silniki wysokoprężne
    oleje napędowe
    paliwa
    tlenki azotu
    emisja tlenku węgla
    silniki Diesla o wtrysku bezpośrednim
    zanieczyszczenie środowiska
    emisja tlenków azotu
    sprawność cieplna
    biodiesel fuel
    carbon monoxide
    diesel engines
    diesel fuels
    fuels
    nitrogen oxides
    carbon monoxide emission
    direct injection diesel engines
    environmental emissions
    nitrogen oxides emission
    thermal efficiency
    Opis:
    The objective of the present study was to experimentally investigate environmental emissions and performance of a stationary type diesel engine fuelled with biodiesels derived from two different feedstocks; one is more unsaturated (rice bran biodiesel) and the other one is more saturated in nature (palm biodiesel) and compare with petrodiesel. Tests were conducted in a single cylinder, air cooled, direct injection diesel engine. From the experimental results, it was found that the nitrogen oxides emissions were higher with biodiesel fuels. The hydrocarbon and carbon monoxide emissions of palm biodiesel were lower than the other test fuels. The smoke emission of rice bran biodiesel was the lowest compared to the rest of the fuels. A considerable reduction in thermal efficiency was found with both the biodiesels when compared to diesel. From the present study, it is concluded that the biodiesels derived from palm and rice bran oils with their different fatty acid composition, show lower exhaust emissions and closer performance characteristics to diesel.
    Źródło:
    Environment Protection Engineering; 2013, 39, 4; 113-124
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimised mix design for normal strength and high performance concrete using particle packing method
    Autorzy:
    Gopinath, S.
    Ramachandra-Murthy, A.
    Ramya, D.
    Iyer, N. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/230735.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    beton zwykły
    beton wysokowartościowy
    metoda ACI
    metoda BIS
    upakowanie ziaren
    upakowanie cząstek
    projektowanie mieszanki
    wytrzymałość na ściskanie
    normal strength concrete
    high performance concrete
    ACI method
    BIS method
    particle packing
    mix design
    compressive strength
    Opis:
    This paper presents the details of optimized mix design for normal strength and high performance concrete using particle packing method. A critical review of mix design methods have been carried out for normal strength concrete using American Concrete Institute (ACI) and Bureau of Indian Standards (BIS) methods highlighting the similarities and differences towards attaining a particular design compressive strength. Mix design for M30 and M40 grades of concrete have been carried out using ACI, BIS and particle packing methods. Optimization of concrete mix has been carried out by means of particle packing method using EMMA software, which employs modified Anderson curve to adjust the main proportions. Compressive strength is evaluated for the adjusted proportions and it is observed that the mixes designed by particle packing method estimates compressive strength closer to design compressive strength. Further, particle packing method has been employed to optimize the ingredients of high performance concrete and experiments have been carried out to check the design adequacy of the desired concrete compressive strength.
    Źródło:
    Archives of Civil Engineering; 2011, 57, 4; 357-371
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of nano silica on mechanical properties and durability of normal strength concrete
    Autorzy:
    Gopinath, S.
    Mouli, P.C.
    Murthy, A.R.
    Iyer, N.R.
    Maheswaran, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/230583.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nanokrzemionka
    nanobeton
    wytrzymałość na ściskanie
    wytrzymałość na zginanie
    RCPT
    analiza kosztów
    nano-silica
    nanoconcrete
    compressive strength
    flexural strength
    cost analysis
    Opis:
    Nano technology is an emerging field of interest for civil engineering application. Among the nano materials presently used in concrete, nano-silica possess more pozzolanic nature. It has the capability to react with the free lime during the cement hydration and forms additional C-S-H gel giving strength, impermeability and durability to concrete. Present paper investigates the effects of addition of nano silica in normal strength concrete. Three types of nano-silica in the form of nano suspension having different amount of silica content have been investigated. Mix design has been carried out by using particle packing method. X-Ray diffraction (XRD) analysis has been carried out to find the chemical composition of control concrete and nano modified concrete. Further, experimental investigations have been carried out to characterize the mechanical behaviour in compression, tension and flexure. It has been observed that the addition of nano-silica in normal strength concrete increased the compressive strength and decreased the spilt tensile strength and flexural strength. Also, Rapid chloride permeability test (RCPT) has been conducted to know the chloride permeability of control concrete, nano modified concrete, and nano coated concrete. It has been observed that the chloride permeability is less for nano coated concrete.
    Źródło:
    Archives of Civil Engineering; 2012, 58, 4; 433-444
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of phytoplankton size-structure based productivity, pigment complexes (HPLC/CHEMTAX) and species composition in the Cochin estuary (Southwest coast of India): special emphasis on diatoms
    Autorzy:
    Paul, M.
    Valappan, M.N.
    Nanappan, U.
    Gopinath, V.
    Velloth, R.T.
    Rajendran, A.
    Nair, M.
    Peariya, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078766.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton
    size structure
    photopigment
    species composition
    diatom
    chlorophyll a
    primary production
    seasonality
    high performance liquid chromatography
    chemotaxonomy
    India
    Opis:
    Seasonal studies on size-fractionated phytoplankton productivity (biomass and primary production), marker pigments, and species composition and abundance were carried out in the Cochin estuary (CE), located on the southwest coast of India, to identify the critical environmental factors that control the consistent preponderance of diatoms. The overall results of the study showed a significant contribution of small-sized phytoplankton, specifically nanophytoplankton (2—20 μm), to the total chlorophyll a and primary production in the estuary, regardless of seasons. Diatoms constituted the major phytoplankton taxa, showed an exceptional seasonal scale increase in numerical abundance during the post-southwest monsoon. The relative increase in fucoxanthin (biomarker of diatoms) over other marker pigments substantiated the numerical dominance of diatoms throughout the sampling periods. This is the first study in the CE in which phytoplankton marker pigments have been detected and elucidated the seasonality of functional groups based on HPLC/chemotaxonomy analytical approaches. The prevalence of high DiatDP and diatom chlorophyll a equivalent (estimated by CHEMTAX), further confirmed the preponderance of diatoms in the CE, despite the intermittent dominance of cyanophytes and cryptophytes (monsoon period). The consistent increase in SPM levels (> 25 mg L—1), established at all sampling stations, indicated that the water column turbidity might be one of the significant environmental factors hindering the growth of large-sized phytoplankton (ca. >20 μm) in the CE even if the system invariably holds high inorganic nutrients, irrespective of seasons
    Źródło:
    Oceanologia; 2021, 63, 4; 463-481
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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