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    Wyświetlanie 1-8 z 8
    Tytuł:
    Optimizing Body Machining Including Variable Casting Allowances
    Autorzy:
    Gessner, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1841423.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast iron geometry assessment
    machining allowance
    machining cost minimization
    Opis:
    The work contains the results of research conducted to optimize the machining of milling table castings. The possibility of reducing the total volume of machining allowances, reducing the wear of cutting tools, shortening machining time and eliminating idle machining passes was considered. The tests were carried out on two batches of castings supplied by two independent foundries. Casting geometry measurements were made using a structured light scanner. The analysis included machining with cemented carbide tools and tool ceramics at two machining centers: DMC200U and DMC270U. It has been shown that as a result of eliminating idle machining passes, it is possible to reduce machining time by 12% for the first and by 44% for the second casting supplier. The estimated annual savings for the production volume of 500 pcs of these castings can range from € 7388 to even € 23 346. The actual cost of cheaper casts was also calculated, taking into account the difference in machining cost resulting from larger machining allowances.
    Źródło:
    Management and Production Engineering Review; 2021, 12, 2; 65-74
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Agent-Based Collaborative Platform for the Optimized Trading of Renewable Energy within a Community
    Autorzy:
    Tasquier, L.
    Aversa, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/308265.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    collective intelligence
    energy cost minimization
    multi-agent systems
    Smart Cities
    Opis:
    Cities are increasingly recognized for their ability to play a catalytic role in addressing climate and energy challenges using technologically innovative approaches. Since energy used in urban areas accounts for about 40% of total EU energy consumption, a change of direction towards renewable energy is necessary in order to alleviate the usage of carbonized electricity and also to save money. A combination of IT and telecommunication technologies is necessary to enable the energy and resources saving. ICT based solutions can be used to enable energy and money saving not only for a single building, but for the whole community of a neighborhood. In this paper a model for the energy cost minimization of a neighborhood together with an agent-based interaction model that reproduces the proposed formal representation is presented. Furthermore the authors present a prototype implementation of this model and first experimental tests.
    Źródło:
    Journal of Telecommunications and Information Technology; 2014, 4; 61-70
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimally controlled heating of solid particles in a fluidised bed with a dispersive flow of the solid
    Autorzy:
    Poświata, A.
    Szwast, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/185641.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optimisation
    cost minimization
    fluidised heating
    fluidization
    optymalizacja
    minimalizacja kosztów
    fluidyzacja
    Opis:
    In this study the authors minimise the total process cost for the heating of solid particles in a horizontal fluidised bed by an optimal choice of the inlet heating gas temperature profile and the total gas flow. Solid particles flowed along the apparatus and were heated by a hot gas entering from the bottom of the fluidised apparatus. The hydrodynamics of the fluidised bed is described by a twophase Kunii – Levenspiel model. We assumed that the gas was flowing only vertically, whereas solid particles were flowing horizontally and because of dispersion they could be additionally mixed up in the same direction. The mixing rate was described by the axial dispersion coefficient. As any economic values of variables describing analysing process are subject to local and time fluctuations, the accepted objective function describes the total cost of the process expressed in exergy units. The continuous optimisation algorithm of the Maximum Principle was used for calculations. A mathematical model of the process, including boundary conditions in a form convenient for optimisation, was derived and presented. The optimization results are presented as an optimal profile of inlet gas temperature. The influence of heat transfer kinetics and dispersion coefficients on optimal runs of the heating process is discussed. Results of this discussion constitute a novelty in comparison to information presented in current literature.
    Źródło:
    Chemical and Process Engineering; 2016, 37, 1; 65-76
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal location of interline power flow controller in a power system network using ABC algorithm
    Autorzy:
    Sreejith, S.
    Psimon, S.
    Selvan, M.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/141232.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    IPFC
    power injection model
    power flow control
    ABC algorithm
    cost minimization
    Opis:
    This paper proposes a methodology based on installation cost for locating the optimal position of interline power flow controller (IPFC) in a power system network. Here both conventional and non conventional optimization tools such as LR and ABC are applied. This methodology is formulated mathematically based on installation cost of the FACTS device and active power generation cost. The capability of IPFC to control the real and reactive power simultaneously in multiple transmission lines is exploited here. Apart from locating the optimal position of IPFC, this algorithm is used to find the optimal dispatch of the generating units and the optimal value of IPFC parameters. IPFC is modeled using Power Injection (PI) model and incorporated into the problem formulation. This proposed method is compared with that of conventional LR method by validating on standard test systems like 5-bus, IEEE 30-bus and IEEE 118-bus systems. A detailed discussion on power flow and voltage profile improvement is carried out which reveals that incorporating IPFC into power system network in its optimal location significantly enhance the load margin as well as the reliability of the system.
    Źródło:
    Archives of Electrical Engineering; 2013, 62, 1; 91-110
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Impact of the Load Characteristics on the Assessment and Optimization of the Shunt Compensation of Distribution Feeders
    Autorzy:
    Saied, M. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/262618.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    radial feeders
    shunt compensation
    losses
    cost minimization
    capacitor allocation
    load characteristics
    Opis:
    The paper gives the results of applying an alternative procedure for the economical as-sessment and optimization of the shunt compensation of radial power distribution feeders with con¬centrated and/or distributed loading, taking into account the feeder copper losses as well .is the installation cost of capacitors. In addition to the energy and capacitor specific costs, the objective function depends on the si/e and location of the capacitor, the feeder resistance, the voltage level, and the load current. The results <»f a detailed parameter study on the impact of the load parameters are presented. The study focuses primarily on the impact of the load factor, the load power factor as well as the feeder's loading profile.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2009, 15, 1; 9-14
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimization of Operation Cost of Critical Infrastructure Network with Cascading Effects Considering Climate-Weather Change Influence
    Autorzy:
    Blokus-Roszkowska, A.
    Kołowrocki, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2068787.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    critical infrastructure
    operation process
    climate-weather change process
    operation cost minimization
    Opis:
    In the paper optimization of operation process and minimization of operation cost for interconnected and interdependent critical infrastructure (CI) networks with cascading effects at variable operation conditions related to the climate-weather change are proposed. A multistate series network with assets dependent according to local load sharing (LLS) rule is analyzed and optimization of operation and safety of CI network with the LLS rule is introduced. For such CI network, the optimal transient probabilities that minimize the mean value of the total operation costs are found. Finally, cost analysis of CI network operation impacted by climate-weather change is presented in case the CI network is non-repairable and in case it is repairable after exceeding its critical safety state.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2018, 9, 1; 71--80
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimalizacja kosztów ogrzewania fluidalnego rozdrobnionego ciała stałego z wykorzystaniem egzergii gazu odlotowego
    Cost minimization for fluidized heating of solid particles with the utilization of outlet gas exergy
    Autorzy:
    Poświata, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2072720.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    optymalizacja
    fluidyzacja
    ogrzewanie fluidalne
    minimalizacja kosztów
    optimization
    fluidization
    fluidized heating
    cost minimization
    Opis:
    Praca dotyczy problemu optymalizacji procesu ogrzewania cząstek ciała stałego w poziomym fluidalnym wymienniku ciepła. W modelu uwzględniono dyspersję osiową dla przepływającego ciała stałego. Podczas optymalizacji minimalizowany jest całkowity koszt procesu przez wyznaczenie ilości gazu ogrzewającego oraz profilu temperatury tego gazu dla przypadku wykorzystania egzergii gazów opuszczających złoże. Wyniki obliczeń optymalizacyjnych pokazują wpływ liczby Pecleta i kinetyki procesu na profile optymalnej temperatury gazu oraz optymalny całkowity przepływ gazu.
    This study concerns the optimization issue of solid particles heating in a horizontal fluidized heat exchanger. A model of the process takes into account the axial dispersion of solid particles. A total cost of the process is minimized by searching heating gas flow rate and a profile of inlet gas temperature for the outlet gas exergy fully used. The results of optimization calculations are presented. An influence of the Peclet number and process kinetics on the profile of gas optimal temperature and on the optimal total flow rate was analyzed.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2015, 6; 350--351
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modele dla potrzeb rozwiązywania zadań optymalizacji taryf
    Models for solving the tariff optimization problem
    Autorzy:
    Pytlak, R.
    Stecz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1378189.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Wydawnictwo Ekonomiczne
    Tematy:
    optymalizacja taryf
    programowanie z ograniczeniami
    minimalizacja kosztu
    tariff optimization
    constraint logic programming
    cost minimization
    Opis:
    We present the methods of telecommunication tariff optimization from a point of client’s view. A client which wants to minimize his monthly fees tries to choose a proper tariff model. In case of large companies these models are more complicated and the optimization models should be used. We describe a simple MIP models and their modifications solved with CLP solvers. All the examples were solved with ILOG and ECLiPSe MIP and CLP solvers.
    Źródło:
    Gospodarka Materiałowa i Logistyka; 2014, 7; 24-32
    1231-2037
    Pojawia się w:
    Gospodarka Materiałowa i Logistyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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