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    Wyświetlanie 1-5 z 5
    Tytuł:
    An appraisal of the properties of bottom waste obtained from bio-mass congestion to estimate the ways of its environmental use
    Autorzy:
    Śliwka, M.
    Uliasz-Bocheńczyk, A.
    Pawul, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/778179.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    bottom waste
    bottom ashes
    bio-mass combustion
    bio-mass
    fluidized-bed boiler
    bio-tests
    phytotests
    energy wastes
    furnace waste
    Opis:
    The bottom waste obtained from bio-mass burning shows a huge variability of chemical and physical properties, depending on the kind of bio-mass, the type of a cauldron and burning parameters. The huge variability of the bottom ashes from the incineration plant and co-combustion of bio-mass makes it difficult to find any way to its management. In reality, only the bottom ashes from coal combustion and the small amount from lignite combustion are used, mainly in the building industry and in mining industry. The article presents the initial research, concerning the estimation of the properties of the bottom ashes obtained from bio-mass congestion in the fluidized-bed boiler to use them safely for the environment. To determine the influence of the tested waste on plants, a number of pot experiments have been conducted. The plants which have been used are recommended for phytotoxicity estimation, and are also used for biological reclamation.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 2; 33-37
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some aspects of long-term testing of cogeneration set fueled with biogas
    Autorzy:
    Semikow, Janusz
    Sumera, Jakub
    Powiązania:
    https://bibliotekanauki.pl/articles/133311.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    gas engine
    siloxanes
    cogeneration set
    CHP
    bio-mass
    biogas
    silnik gazowy
    siloksany
    zespół kogeneracyjny
    biomasa
    biogaz
    Opis:
    Article presents the results of long-term testing of prototype of 64 kVA biogas cogeneration set (CHP - Combined Heat and Power), build with support of financial means from the MCP R&D program 1 2 1. Between others, the impact of fueling with biogas from the sewage treatment plant on the engine oil has been investigated. Used oil analyses unveiled adverse presence of silicon compounds, i.e. siloxanes, permissible level of which (according to MAN standard) was exceeded several times. In order to reduce these compounds, prototype biogas filter based on activated carbon has been developed. Based on initial calculations, overall efficiency of this cogeneration set is circa 70%. For the consumer needs, the entire installation is enclosed in a compact soundproof canopy. Besides environmental merits, the cogeneration set shows also economical advantages. If operating continuously, the gen-set CHP would produce electrical and heat power in an amount that its purchasing cost would be returned after about 12 months, under condition of having biogas.
    Źródło:
    Combustion Engines; 2019, 58, 4; 136-141
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mass transfer analysis of two-phase flow in a suspension of microorganisms
    Autorzy:
    Mamatha, S.U.
    Ramesh, Babu, K.
    Durga Prasad, Putta
    Raju, C.S.K.
    Varma, S.V.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/240799.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gyrotactic microorganisms
    dusty fluid
    mass transfer
    stretching sheet
    bio convection
    boundary layer flow
    Opis:
    The aim of present work is to investigate the mass transfer of steady incompressible hydromagnetic fluid near the stagnation point with deferment of dust particles over a stretching surface. Most researchers tried to improve the mass transfer by inclusion of cross-diffusion or dust particles due to their vast applications in industrial processes, extrusion process, chemical processing, manufacturing of various types of liquid drinks and in various engineering treatments. To encourage the mass transport phenomena in this study we incorporated dust with microorganisms. Conservation of mass, momentum, concentration and density of microorganisms are used in relevant flow equations. The arising system of nonlinear partial differential equations is transformed into nonlinear ordinary differential equations. The numerical solutions are obtained by the Runge-Kutta based shooting technique and the local Sherwood number is computed for various values of the physical governing parameters (Lewis number, Peclet number, Eckert number). An important finding of present work is that larger values of these parameters encourage the mass transfer rate, and the motile organisms density profiles are augmented with the larger values of fluid particle interaction parameter with reference to bioconvection, bioconvection Lewis number, and dust particle concentration parameter..
    Źródło:
    Archives of Thermodynamics; 2020, 41, 1; 175-192
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temporal and spatial changes in the bio-optical properties of seawater in the Nordic Seas – AREX’2003 and 2006
    Autorzy:
    Drozdowska, V.
    Paryvkina, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/47895.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Atlantic water
    bio-optical property
    chlorophyll
    fluorescence
    Nordic Sea
    ocean circulation
    organic matter
    oxygen
    phytoplankton
    sea water
    shelf water
    spatial change
    Svalbard Islands
    temporal change
    water mass
    Opis:
    For many years the Nordic Seas have been the subject of research into ocean circulation carried out by the Institute of Oceanology PAS, especially the inflow of Atlantic water and the intensive turbulent mixing of these waters with Arctic and shelf waters. Ocean currents affect various biological processes, among them the supply of organic matter and oxygen, which constitute the foundation for the unique flora and fauna of the Svalbard islands. Spectrophotometric examinations of surface waters using an M32 B spectroflu- orophotometer (LDI Ltd.) were carried out repeatedly during Arctic cruises on board r/v ‘Oceania’. The results presented in this paper come from the AREX campaigns of 2003 and 2006. Analysis of the chlorophyll a fluorescence excitation spectra recorded shows an increase in phytoplankton abundance and the changes in the spatial distribution of the phytoplankton species characteristic of Atlantic, Arctic and shelf waters. The spatial patterns of the phytoplankton pigments and their abundance were compared with the physical characteristics of water masses. The analysis confirmed that phytoplankton species move together with the Atlantic water as this flows into northern latitudes.
    Źródło:
    Oceanologia; 2011, 53, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biomass as an answer to sustainable energy. Opportunity versus challenge
    Autorzy:
    Cao, Y.
    Pawłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/207977.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    biomass
    energy conservation
    fossil fuels
    greenhouse gases
    renewable energy resources
    bio-mass energy
    energy from biomass
    renewable energies
    sustainable energy
    biomasa
    oszczędność energii
    paliwa kopalne
    gazy cieplarniane
    odnawialne źródła energii
    energia biomasy
    energia z biomasy
    energetyka zrównoważona
    Opis:
    Current world economic development is heavily dependent on fossil fuels that are nonrenewable and are main emitter of the greenhouse gases, leading to resources to be exhausted on one side, and the earth being warmer on the other. This in turn creates a shrinking bottleneck to economic development and wealth generation. Therefore, in pursuit of a sustainable future, a shift from fossil fuels to renewable energy should be taken essentially. Biomass is an indispensable element for development of sustainable energy because it is the only renewable energy source that can be used to produce liquid fuel. In the paper, the sustainability of energy from biomass has been discussed, with the focus on an identification of its benefits and challenges. The necessity of deployment of biomass energy and its progress in China and Poland have also been described.
    Źródło:
    Environment Protection Engineering; 2013, 39, 1; 153-161
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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