Random preventive maintenance policy based on inspection for a multicomponent system using simulation

Marsaro, Mônica Frank; Cavalcante, Cristiano Alexandre Virgínio

doi:10.17531/ein.2017.4.8

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…By using the values obtained from a large set of laboratory data, it is possible to estimate the parameters, and finally the objective function has been obtained to minimize and optimize the process based on the GA algorithm and the temperature and molar component and the carbon group's number. This simulation results were consistent with the actual data extracted from the catalytic conversion unit with the continuous restoration of the some Refineries [29,10]. In 2011, Gueddar et al, used artificial neural network ANN methodology to simulate and optimize the catalytic conversion unit with continuous regeneration based on a nonlinear reduction model [29].…”

Section: A Review Of History and Studiessupporting

confidence: 67%

“…Excess of Moisture: Good acidity of the catalyst is controlled by the balance between H2O and HCL. An excess of water in the recycle will shift the balance towards excess of OH-and thus reduce the activity [10]. Lack of Moisture: Conversely, if the amount of water in the recycle is too low (an infrequent case) the catalyst is reputed too dry, the OH-to CL-balance is shifted towards CL-.…”

Section: Metallic Functionmentioning

confidence: 99%

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Study of Operational Conditions in Octanizer and Hydro-Treating Units in Oil Refinery Company

et al. 2019

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The catalytic conversion of naphtha is a refinery process in which heavy naphtha feeds through the catalytic bed of several reactors at high temperatures and pressures that potentially increase the aromatics content of naphtha and its octane number. Usually, naphtha feed is used to remove the impurities that prevent useful reactions and cause poisoning of reformer catalysts. Operating abutments for the catalytic converter unit are temperature, pressure, metallurgical agent, hydrogen to hydrocarbon ratio, and chlorine ratio. In this study, Operational Conditions in Octanizer and Hydro-treating Units in oil refinery companies is investigated and optimized the conditions of catalysis.

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Section: A Review Of History and Studiessupporting

confidence: 67%

Section: Metallic Functionmentioning

confidence: 99%

Study of Operational Conditions in Octanizer and Hydro-Treating Units in Oil Refinery Company

et al. 2019

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“…The article [7] uses fuzzy variables (fuzzy sets), while paper [22] examines multistate systems with components requiring minimal repair. Using simulation methods for testing preventive renewals was presented in paper [20]. This paper examines operation systems in which the technical object may at a given moment appear in one of the n states.…”

Section: Introductionmentioning

confidence: 99%

Multi-state model of maintenance policy

Knopik¹,

Migawa²

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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Preventive replacement is applied to improve the device availability or increase the profit per unit time of the maintenance system. In this paper, we study age-replacement model of technical object for n-state system model. The criteria function applied in this paper describe profit per unit time or coefficient of availability. The probability distribution of a unit‘s failure time is assumed to be known, and preventive replacement strategy will be used over very long period of time. We investigate the problem of maximization of profit per unit time and coefficient availability for increasing the failure rate function of the lifetime and for a wider class of lifetime. The purpose of this paper is to obtain conditions under which the profit per unit time approaches a maximum. In this paper we shows that the criteria function (profit per unit time or coefficient availability) can be expressed using the matrix calculation method. Finally, a numerical example to evaluate an optimal replacement age is presented.

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“…The purpose of this paper is to examine the role and importance of health, safety and environment (HSE) in the oil and gas industry from different aspects and perspectives and emphasize the need for an integrated health, safety and environmental management system in these industries [5,6]. The results of this study show that respecting and preserving the HSE is one of the principles of sustainable development of countries; the ultimate goal of each of these three issues is to preserve human health and human life, and taking these three issues together leads to more productivity; a management system health, safety, and the environment can be successful if it has a preventive approach to occupational accidents and environmental damage; as with any other management system, the proper culture of health safety & environment management system (HSEMS) leads to ease of implementation and efficiency; as contractors play an important role [7,8]. There are many oil and gas projects in the country, It is necessary to pay special attention to the HSE affairs of this worker group; in all oil companies in the world, attention to the issue of HSE is an inevitable priority, so that without the implementation of this management, the legitimacy of their activities is in fact questioned and necessary in the oil and gas industry [9].…”

Section: Introductionmentioning

confidence: 99%

Nessacities of Studying HSE Management Position and Role in Iran Oil Industry

Mohammadnazar

Samimi

2019

J. Chem. Rev.

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Today, diseases and accidents on one of the social concerns of workers and those involved in occupational safety and health issues has become. In addition to the general culture of health and safety factors related to non-compliance with relevant laws and regulations and lack of education can be a lack of planning and attention to occupational health and safety of workers in most industries, including the reasons for the high rate of accidents and work-related disease outlined. Due to the importance of the health of workers in all countries need to manage to achieve a coherent approach to improve working conditions, more than ever appears. Safety position in the heart of the organization's current management and its elements such as organizational structure, planning activities, responsibilities specified in the methods of work according to the resources available to maintain the policy of health, Safety and the environment is working. Maybe HSE management concept is abet complex in first glance. But this is simple concept and it has close relationship with us and we understand simple city. Maybe hygienic, security and environment concepts and not simple for you. HSE management increase hygienic awareness, security and environment level and decrease dangerous factors and event occurrence and it is possible with workspace security. HSE position is in the organization current heart and elements like organizational structures, activities planning, determine responsibility in methods for doing and try for hygienic way maintain, security and environment. In this paper discussed HSE significance in Iran oil industry.

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Random preventive maintenance policy based on inspection for a multicomponent system using simulation

Cited by 7 publications

References 29 publications

Study of Operational Conditions in Octanizer and Hydro-Treating Units in Oil Refinery Company

Study of Operational Conditions in Octanizer and Hydro-Treating Units in Oil Refinery Company

Multi-state model of maintenance policy

Nessacities of Studying HSE Management Position and Role in Iran Oil Industry

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