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    Wyświetlanie 1-6 z 6
    Tytuł:
    Evaluation of the Parameters of the Green Supplier Selection Decision in Textile Industry
    Ocena parametrów decyzji selekcji ekologicznych dostawców w przemyśle włókienniczym
    Autorzy:
    Acar, A. Z.
    Önden, I.
    Gürel, Ö.
    Powiązania:
    https://bibliotekanauki.pl/articles/232567.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    textile industry
    green consideration
    supplier selection
    fuzzy analytic hierarchy process
    przemysł włókienniczy
    proces wytwórczy
    koszty dostawy
    proces hierarchii analitycznej
    Opis:
    Green issues are a popular topic in today’s business life, and it is possible to see green products or advertisements in many different places due to the demand for a healthier lifestyle. Companies that are willing to be a part of the green concept should integrate this philosophy in all departments. As a result, the procurement might be seen a crucial part of this integration. However, in the emerging markets, green issues might be pushed into the background due to the competitive environment. In this study, we investigated green and other parameters in the supplier selection decision in textile industry. A decision criteria list was created and evaluated by 28 experts using the fuzzy analytic hierarchy process. The results showed that green issues have an influence on the decision environment; however, classical parameters, such as cost, delivery reliability, quality, service, and strategic alliance still carry more priority compared to green criteria consisting of environmental management, green products, and pollution control.
    Zagadnienia ekologiczne są bardzo istotne przy współczesnej produkcji. Wytwórcy, którzy chcą brać udział w wytwarzaniu i kształtowaniu ekologicznych zasad muszą brać pod uwagę wszystkie aspekty procesu wytwórczego. W tym opracowaniu badano ekologiczne aspekty wyboru dostawców biorąc pod uwagę również koszty dostawy produktów, warunki dostawy, jakość, system obsługi oraz uwarunkowania strategiczne.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2016, 5 (119); 8-14
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examination of Different Heat Exchangers and the Thermal Activities of Different Designs
    Autorzy:
    Ipek, O.
    Kan, M.
    Gurel, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031281.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    heat exchangers
    compact heat exchanger
    micro channel heat exchanger
    Opis:
    In this study, instead of gasketed or brazed plate heat exchangers, which are used in various fields of application, a direct metal sintering method is used to design a heat exchanger with its original geometry and with different geometries. Studies of heat exchangers found in published literature were reviewed, and the thermal behaviors of the proposed unique designs were examined. Usually heat exchangers using this design do not use channel spacing angles of 30-45-60-75° for the plate ducts. The thermal behaviors of the fluid-circulating systems were analyzed using ANSYS FLUENT software, and they used the boundary conditions found in the literature for this design. Heat transfer between the heat exchanger channels and channel walls was calculated. The analyses results show that an increase in the amount of heat transfer surface area and also an increase in surface roughness increased the amount of positive heat transfer.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 580-584
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Analysis of Pulverised Coal Fired Boiler with Different Burner Geometries
    Autorzy:
    Gurel, B.
    Ipek, O.
    Kan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402493.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    44.15.+a
    Opis:
    Pulverized coal combustion is extensively used in utility boilers, industrial boilers, furnaces, kilns, and other energy conversion appliances. The effective utilization of pulverized coal is the main problem in study of combustion processes, particularly in burning low-grade coal. It is well known that the emission of nitrogen oxides $(NO_{x})$ during coal combustion is a main environmental problem. In this study, three different pulverised coal burner geometries for a pulverised coal fired boiler have been studied by numerical analysis. GLI-Tunçbilek coal was used as fuel. Three-dimensional numerical analysis was carried out using Ansys Fluent code. Realizable K-ε turbulence method, single rate devolatilization method, multiple char combustion method and second-order upwind discretization method were used during calculations. Coal particle diameter and coal mass flow rate were assumed to be 70 μm and 378 kg/h respectively.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-43-B-45
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical Investigation on Hydrodynamic Combustion and NO_x Emission Behavior in 8 MW Circulating Fluidized Bed
    Autorzy:
    İpek, O.
    Gürel, B.
    Kan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031746.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    circulating fluidized bed
    hydrodynamic analysis
    multi-phase flow
    NO_x emissions
    clean coal
    Opis:
    Multi-phase flow is one of the types of flow which is frequently observed in natural phenomena and engineering applications. Circulating fluidized beds constitute an important application of multi-phase flow. The combustion and emission behaviours in circulating fluidized beds are determined by hydrodynamic of bearing. The most appropriate combustion can be provided with the hydrodynamic structure of bearing, taking into account fuel and operating parameters. Therefore, the hydrodynamic structure of circulating fluidized beds should be displayed with mathematical/physical modelling and simulation approach for its analysis and synthesis. Mathematical analysis in today's conditions is very difficult or impossible because of excessive turbulence, unstable and two-phase flow characteristics of the bed. Therefore, the most effective way to do this is the use the physical modelling and simulation approach. In this study, 8 MW circulating fluidized bed hydrodynamic analysis are made by ANSYS-FLUENT R14 commercial CFD code and then combustion and emissions analysis are made with hydrodynamic analysis results. These analysis results show that combustion chamber exit mean NO_x emission was 38.5 ppm and combustion chamber exit mean temperature was 1123 K.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 553-557
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plate Heat Exchangers as a Compact Design and Optimization of Different Channel Angles
    Autorzy:
    Kan, M.
    Ipek, O.
    Gurel, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402529.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    44.15.+a
    Opis:
    In this study, thermal treatments have been investigated for different channel angles and mass flow rates of a compact heat exchanger have been manufactured by direct metal laser sintering technique instead of a sealed and brazed one used in many areas. Boundary conditions of available heat exchanger experimental test have been used in laboratory. In this study, we have designed for compact heat exchanger of 30°, 45° and 60° channel angle and used three different mass flow rates (0.2, 0.3, and 0.43 kg/s). Heat transfers occurring between heat channels and walls of heat exchangers for different channel angles and efficiency of heat exchangers have been calculated. As a result of the analysis, it has been determined that in order for maximum of heat transfer of a compact heat exchanger, following working conditions ought to be fulfilled: channel angle 30°, hot water input temperature 60°C, cold water input temperature 15°C, and mass flow rate 0.43 kg/s.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-49-B-52
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spirulina Platensis Affects Factors Involved in Spermatogenesis and Increases Ghrelin Receptors in Testis Tissue of Rats Fed a High-Fat Diet
    Autorzy:
    Esener, O.B.B.
    Gurel-Gurevin, E.
    Isbilen-Basok, B.
    Yigit, F.
    Bilal, T.
    Altiner, A.
    Yilmazer, N.
    Armutak, E.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087925.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Polish Journal of Veterinary Sciences; 2017, 3; 467-475
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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