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    Tytuł:
    Availability analysis of an offshore oil and gas production system subjected to age-based preventive maintenance by Petri Nets
    Autorzy:
    Lotovskyi, Eduard
    Teixeira, Angelo Palos
    Soares Guedes, Carlos
    Powiązania:
    https://bibliotekanauki.pl/articles/1841926.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    production availability
    age-based imperfect preventive maintenance
    offshore installations
    oil and gas production
    Petri Nets
    Monte Carlo simulation
    Opis:
    The main objective of this paper is to model an offshore oil production system subjected to age-based preventive maintenance strategies by Petri Nets and to evaluate its availability by Monte Carlo Simulation. The oil processing and the separation equipment with their reliability and maintainability characteristics, the corrective and preventive maintenance policies and the operational dependencies that lead to the reconfiguration of the system after the failure are implemented. A special attention is given to the effect of age-based perfect and imperfect preventive maintenance strategies on the system availability. The maintenance actions consider the components’ age thresholds and an age reduction ratio. Moreover, the variation of the oil and gas flows from the well over the years is accounted by the model. As case study, an offshore production installation that operates in a Brazilian oilfield is adopted. An elasticity analysis on the model parameters is conducted to assess influence of the maintenance policy on the system availability and on the oil production.
    Źródło:
    Eksploatacja i Niezawodność; 2020, 22, 4; 627-637
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Equivalent availability index for the performance measurement of haul truck fleets
    Autorzy:
    Kristjanpoller, Fredy
    Viveros, Pablo
    Zio, Enrico
    Pascual, Rodrigo
    Aranda, Oscar
    Powiązania:
    https://bibliotekanauki.pl/articles/1841923.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    performance assessment
    reliability engineering
    production management
    availability
    Opis:
    This article presents a model of performance analysis for a truck fleet system in an openpit mine, considering special characteristics of haul fleets. In these systems, the expected availability of each piece of equipment and its operating capacity are the fundamental variables to construct a global fleet performance function. Our analytical algorithm considers heterogeneous fleets with known individual characteristics of transport capacity and failure and repair behavior. The results converge to a new indicator denominated “Equivalent Availability” (EA), which arises from the need to evaluate the capacity of the truck fleet to operate at a lower payload than required using different combinations of equipment to achieve an availability goal. EA is a key indicator to determine the productive capacity of a process, and for selecting equipment and their combinations to achieve production objectives. To exemplify the potentialities of the EA, a case study is implemented in a Chilean copper truck fleet mining process.
    Źródło:
    Eksploatacja i Niezawodność; 2020, 22, 4; 583-591
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Impact of Unscheduled Downtimes on their Availability in Machine Operations
    Autorzy:
    Brodny, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2064991.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    mining production
    unscheduled downtimes
    mining machines
    efficiency
    availability
    Opis:
    Unscheduled downtimes in machine operation are one of the main reasons behind their low availability. Such downtimes are caused by miscellaneous factors and remain difficult to identify in a number of cases. This particularly refers to enterprises that conduct their activities in changing external conditions, such as hard coal mines, where exploitation is carried out in extremely complicated, changeable and dangerous conditions. The process of coal production makes use of various machines that must be adapted to these conditions. The specificity of the working environment makes it necessary for these machines to exhibit high reliability, readiness and efficiency. These features, in turn, make the cost of the machines very high. It is therefore reasonable to make the best use of their capabilities, which translates into the effectiveness of the entire production process. The article concentrates on determining the availability of these machines. It has been assumed that availability is one of the fundamental parameters that define the effective utilisation of machines. The tests were conducted for a longwall shearer as well as an armoured face conveyor and a main haulage conveyor in one of the hard coal mines in Poland. Industrial automation systems were used to determine unscheduled downtimes in the operation of these machines, as well as their time structure and causes. The results obtained indicate that the number of unscheduled downtimes represents a serious problem in mining exploitation.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 145--151
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of Make-to-Stock (MTS) production environment management methods – research concept
    Autorzy:
    Ciechańska, Olga
    Powiązania:
    https://bibliotekanauki.pl/articles/1202453.pdf
    Data publikacji:
    2018
    Wydawca:
    Wyższa Szkoła Biznesu w Dąbrowie Górniczej
    Tematy:
    Maturity model
    Make-to-Stock
    Make-to-availability
    Production environments
    Opis:
    The aim of the study is to present a concept for researching the production-for-inventory environment. The article focuses on the comparison of two production stockpiling environments, namely that of Make-to-Stock (MTS) and its developed version, Make-to-Availability (MTA). The article also presents research concepts related to the evolution of the MTS environment. The article presents the characteristics of production for inventory and for availability, while the matter of maturity models is also presented and a gap in the research is identified. The target and scope of the research is defined and the research program is discussed, and the research methods used at individual research stages have been identified. The status of the level of advancement of the research is presented,as are conclusions from previously undertaken research as well as further directions for this research, recommendations for the future, and the expected results of this work. The synthesis of the research will be to propose a maturity model for organisations functioning in the MTS / MTA environment.
    Źródło:
    Forum Scientiae Oeconomia; 2018, Volume 6 (2018) Issue No. 2: Economic Growth, Innovations and Lobbying; 21-32
    2300-5947
    Pojawia się w:
    Forum Scientiae Oeconomia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uncertainty analysis of production in open pit mines – operational parameter regression analysis of mining machinery
    Autorzy:
    Lanke, A. A.
    Ghodarati, B.
    Hoseinie, S. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/88986.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    mine production
    availability
    utilization
    regression
    Opis:
    In mining uncertainties related to equipment and operation are major reasons for loss of production. In order to address this issue, a wide literature review was done in this study. It showed that reliability of equipment, spare part availability, automation of equipment are researched areas focused. However, a methodology which relates operational issues directly to production levels has been not studied with detailed analysis. In order to overcome this issue and propose, a method to achieve production assurance is the objective of this study. A case study with 2.5 years of data from a large open pit mine is carried out. Following the statistical principles, multiple regressions modelling with details analysis, optimization of payload and interpretation of analysis are used. It showed that at system level availability, utilization and maximum capacities are important criteria for finding root cause in loss of production. Model for shovel fleet showed that availability is the most important characteristics hindering it to achieve a higher level of production. It was also seen that 3 to 4 number of shovels are optimal for achieving current level of production. For truck fleet model represented that capacities involved are less important factor as compared to the utilization of the fleet.
    Źródło:
    Mining Science; 2016, 23; 147-160
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Risk analysis of water supply interruptions in collective water supply systems
    Autorzy:
    Tchórzewska-Cieślak, B.
    Rak, J. R.
    Piegdoń, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069330.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    water supply
    availability
    risk management
    value of water scarcity
    water production subsystem
    Opis:
    The subject and main purpose of this study is to present the method of risk analysis and assessment of the lack of water supply to the collective water supply system (CWSS). Presented method using the expected value of water scarcity. The analysis was based on all possible states of the operation of water production subsystem. The article contains calculation example of analysis for the exemplary CWSS with regard to absolute risk, equal to the expected value of water scarcity and the relative risk referred to the nominal value of the water demand. In the example attached special importance to the criteria levels of the relative risk of lack of water supply. Presented method is a new concept which allows to make comprehensive analysis of reliability, safety and operation of the collective water supply system.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2012, 3, 2; 201--208
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dependability shaping approach of devices used in production process
    Autorzy:
    Szpytko, J.
    Gliwinski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/247074.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    availability
    production process
    OEE indicator
    synergy effect
    constantly improvement
    Opis:
    Paper presents the methodology of shaping dependability of devices used in process with use key performance indicators for increasing Overall Equipment Efficiency (OEE) which are a subject of devices' parameters monitoring under operation. Value of Overall Equipment Efficiency describes the technical state of devices included into production process. Value itself can be different for different production lines even in one industry. For engineers it is important to put all possible effort to increasing values of particular key performance indicators which are building Overall Equipment Efficiency. Values of particular key performance indicators, shows to experienced engineer real technical state of whole production line. Presented in paper selected indicators are connected and have influence for each other, moreover operation parameters of devices' are characterizing production process. Key performance indicators presented in paper represents three the most important aspects of the production process: handling of the process, operators' area of responsibility, management of the process, managers' area of responsibility and optimization of the process, planners' area of responsibility. Only proper cooperation of these three groups of people can benefits requested result. From owners point of view, presented areas have the same importance, problems created in one of them can negatively influence for overall income of whole enterprise.
    Źródło:
    Journal of KONES; 2011, 18, 4; 493-502
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-suitable device technical state replacement results maintenance approach
    Autorzy:
    Szpytko, J.
    Gliwinski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/247072.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dependability
    safety
    monitoring
    availability
    production process
    synergy effect
    Opis:
    Paper presents the methodology of maintaining dependability of devices used in process with use particular scheduled methods of maintenance. Presented in paper methods are dedicated for particular area and included there machines, devices, auxiliary system or tools. Presented in paper selected method and area are connected and have influence for each other. Methods are combination of operators experience, recommendation of production line supplier and engineers approach. Selected areas enfold both, operating and maintenance issues. From production process point of view, operating area which is mostly focused on steering of the process and maintenance area which is mostly focused on maintaining dependability of included into process machines and devices on satisfy level, should be treated with the same importance. Situation whit taking care about operational issues and forgetting about maintenance issues can work out only for very short time. Opposite situation is not possible to imagine. Operational area and maintenance area are interconnected and can be beneficial only in cooperation. Another problem connected with that is peoples' understanding, they have to accept that their jobs in their areas can be profitable with strongly and proper cooperation with jobs and positive attitude of people from other area. Production process consist from operation and maintenance area as well and only with this approach can be profitable for owners and all employees. Presented in paper methods touches both operational and maintenance areas as well. Paper is summarizing by results of experiment coming from practice.
    Źródło:
    Journal of KONES; 2011, 18, 4; 481-492
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increasing flexibility and availability of manufacturing systems - dynamic reconfiguration of automation software at runtime on sensor faults
    Autorzy:
    Wannagat, A.
    Vogel-Heuser, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/384699.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    agents
    programmable logic controller (PLC)
    industrial production systems
    availability
    Opis:
    This proposal introduces a conceptual design of self-adapting system software to manage sensor failures in factory automation. The approach reconfigures the arrangement of software modules in real time to preserve the required stability of production processes without interrupts. Reconfiguration will be decided by rules from a knowledge base system. This paper discusses conventional, o bject oriented and agent based concepts, and focuses on modelling of these concepts. For discussion purposes, a real industrial application - a continuous thermo-hydraulic press will be presented as application example.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 3; 47-53
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena wyposażenia w maszyny do produkcji ziemniaka wybranych gospodarstw Małopolski
    Evaluation of equipment in machines for production of potatoes in chosen farms of Małopolska region
    Autorzy:
    Krzysztofik, B.
    Nawara, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/288875.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    produkcja
    ziemniak
    technologia
    wyposażenie w maszyny
    potato
    production
    technology
    availability of machinery
    Opis:
    Dokonano analizy wyposażenia w maszyny przeznaczonych do produkcji ziemniaka. Badania obejmowały wybrane gospodarstwa województwa małopolskiego w dwóch gminach rolniczych tj. w gminie Proszowice i Nowe Brzesko. Większość badanych gospodarstw posiada podstawowy zestaw maszyn potrzebny do prawidłowej agrotechniki ziemniaka. Jedynie w grupie maszyn do zbioru (kopaczki i kombajny) istnieje niedobór maszyn własnych, ale istnieją duże możliwości korzystania z pomocy sąsiedzkiej.
    Evaluation of availability of machines for production of potatoes has been carried out. The study covered chosen farms from Małopolskie Voivodeship, in two agricultural communes, i.e. Proszowice and Nowe Brzesko. Most of the farms surveyed were equipped with basic machines for proper production of potatoes. The only shortage of own machines exists in the harvesting machinery (combine-harvesters and potato diggers), these however, can be successfully shared by neighbours.
    Źródło:
    Inżynieria Rolnicza; 2005, R. 9, nr 7, 7; 41-49
    1429-7264
    Pojawia się w:
    Inżynieria Rolnicza
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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