A Multi-Module Systemic Approach for the Supply Reliability Analysis of Multi-Product Pipeline Under Pump Units Failure

2018 ◽  
Author(s):  
Xingyuan Zhou ◽  
Qi Liao ◽  
Mengyun Lv ◽  
Haoran Zhang ◽  
Yongtu Liang ◽  
...  
Keyword(s):  
Reliability Analysis ◽  
System Analysis ◽  
Reliability Evaluation ◽  
Systemic Approach ◽  
Pipeline System ◽  
Oil Supply ◽  
Scheduling Method ◽  
Evaluation Module ◽  
Product Pipeline ◽  
Supply Reliability

As the primary means of refined products transportation, multi-product pipeline plays a vital role in connecting refineries to local markets. Once disruptions occur, it will cause security issue on oil supply to downstream markets, even on the economy and stability of society. Based on the conventional reliability theory and detailed scheduling method of multi-product pipeline considering hydraulic constraints, this paper firstly proposes a multi-module systemic approach for the supply reliability analysis of multi-product pipeline under pump units failure conditions. Pump units are important corollary equipment in multi-product pipeline and their failure would affect the pipeline normal operation and downstream oil supply greatly. The approach includes three modules, namely, pump units analysis module, pipeline system analysis module and reliability evaluation module. In the pump units analysis module, Failure Mode and Effects Analysis (FMEA) method is adopted to analyse the correlations between pump units failure modes and causes. The Monte Carlo simulation method is employed to generate different failure scenarios based on the estimated failure rate of pump units. In the pipeline system analysis module, the detailed scheduling method of multi-product pipeline is adopted to calculate the maximum supply capacity for all delivery stations under a specific scenario. Due to the difficulty in solving detailed scheduling problem considering hydraulic constraints directly, two mixed integer linear programming (MILP) models are established. In the reliability evaluation module, the indexes of shortage, probability and adequacy are calculated to analyse the supply reliability quantitatively from global perspective and individual perspective. Finally, the proposed approach is applied to a real-world multi-product pipeline in Zhejiang, China. It is proved that this approach could provide significant guidelines for the supply reliability analysis of multi-product pipeline.

Gas supply reliability analysis of a natural gas pipeline system considering the effects of underground gas storages

2019 ◽  
Vol 252 ◽  
pp. 113418 ◽  
Author(s):  
Weichao Yu ◽  
Jing Gong ◽  
Shangfei Song ◽  
Weihe Huang ◽  
Yichen Li ◽  
...  
Keyword(s):  
Natural Gas ◽  
Reliability Analysis ◽  
Gas Pipeline ◽  
Pipeline System ◽  
Natural Gas Pipeline ◽  
Gas Supply ◽  
Supply Reliability

Consecutive k-out-of-n lines with a change point

2016 ◽  
Vol 230 (6) ◽  
pp. 545-550 ◽  
Author(s):  
Serkan Eryilmaz
Keyword(s):  
Closed Form ◽  
Reliability Analysis ◽  
Change Point ◽  
Reliability Evaluation ◽  
Telecommunication Networks ◽  
Pipeline System ◽  
Time To Failure ◽  
Oil Pipeline ◽  
Vacuum Systems ◽  
Mean Time

Reliability analysis of consecutive k-out-of- n systems and their generalizations has attracted a great deal of attention in the literature. Such systems have been used to model telecommunication networks, oil pipeline systems, vacuum systems in accelerators, spacecraft relay stations, etc. In this paper, nonrecursive closed form equations are presented for the reliability functions and mean time to failure values of consecutive k-out-of- n systems consisting of two types of nonidentical components. The results are illustrated for reliability evaluation of oil pipeline system.

scholarly journals Impacts of succession in family business

2019 ◽  
Vol 26 (3) ◽  
pp. 304-324 ◽  
Author(s):  
Andreas Gabriel ◽  
Vera Bitsch
Keyword(s):  
Organizational Climate ◽  
Family Business ◽  
System Analysis ◽  
System Thinking ◽  
Systemic Approach ◽  
Analysis Tool ◽  
Retail Sector ◽  
Content Type ◽  
Key Variables ◽  
Intra Family

PurposeWhile many studies in family business research focus on mono-causal impacts of succession, the purpose of this paper is to employ a systemic approach to analyze dynamic effects of intra-family succession on multiple business areas in family-run companies.Design/methodology/approachA system analysis using a participatory approach was conducted for a reference family-run company operating in the horticultural retail sector in Germany. The Vester Sensitivity Model, supplemented with principles from system thinking was used to identify key variables related to intra-family succession.FindingsExpert input and analysis of variable co-occurrence revealed key variables associated with succession such as “strategic planning,” “productivity” and “financial flexibility.” Dynamic interactions among various business areas were identified by simulating interventions in succession trajectories. In particular, key variables such as “conflicts between family and work” and “organizational climate” turned out to be highly sensitive to changes during a succession process.Practical implicationsThe concept and design of this system analysis tool will allow practitioners such as company managers and business consultants to better understand complex interrelations within companies and provide additional guidance with regard to critical events like business transfer.Originality/valueThe present study uses system thinking to analyze succession and its dynamic and time-lagged impacts on affected business areas in family-run companies for the first time. Repeated application of the systemic approach presented here to real-world business cases will gradually improve the tool and the quality of information it provides.

Reliability Evaluation Research of 10 kV Typical Configuration Feeder Based on the FMEA

2014 ◽  
Vol 986-987 ◽  
pp. 439-444
Author(s):  
Wen Wu Li ◽  
Xin Chun Zhu ◽  
Cheng Zhang
Keyword(s):  
Power Supply ◽  
Evaluation Research ◽  
Reliability Evaluation ◽  
Space Truss ◽  
Standby Power ◽  
Space Truss Structure ◽  
Equipment Configuration ◽  
Typical Configuration ◽  
System Average ◽  
Supply Reliability

The 10kV feeder typical configuration is divided into two categories of no standby power and standby power in the paper, and subdivided into different configurations, then we use FMEA to analyze the power supply reliability of 10 kV radial lines under the different configurations, at last we compare and analyze the reliable indexes of the different equipment configuration schemes, such as the reliable rate RS-1, the system average interruption frequency AITC-1 etc. The research results show that space truss structure and switch configuration directly affect the power supply reliability of the distribution network. In the conditions of reserved auto-switch-on device and section switches automatically isolating faults, the power supply reliability rate is the highest, and the average interruption frequency and outage time are the lowest.

Engine Lubrication System Analysis by Considering Aeration and Cavitation within the Rotating Oil Supply Passage

2007 ◽  
Vol 50 (1) ◽  
pp. 39-49 ◽  
Author(s):  
Yiqing Yuan ◽  
Wei Tao ◽  
Eysion A. Liu ◽  
Gary C. Barber ◽  
Qian Zou ◽  
...  
Keyword(s):  
System Analysis ◽  
Lubrication System ◽  
Oil Supply

Reliability Analysis and Design for Pipe-in-Pipe Pipelines With Centralizers

2015 ◽  
Author(s):  
Steve Mao ◽  
Muhammad Kamal ◽  
Wei Qiao ◽  
Gang Dong ◽  
Brian Duffy
Keyword(s):  
Fatigue Life ◽  
Reliability Analysis ◽  
Fatigue Damage ◽  
Failure Probability ◽  
Probabilistic Method ◽  
Pipeline System ◽  
Limit Function ◽  
Analysis And Design ◽  
Manufacturing Tolerances ◽  
The Given

In this paper, a simplified reliability model is developed to identify how the pipe-in-pipe component uncertainties (manufacturing tolerances of centralizer thickness) influence the fatigue life of the system. The focus is on the reliability analysis with respect to the centralizer thickness. In order to reduce the complexity of the problem, only the centralizer thickness is considered to be a random variable. A limit function is formulated based on the three dimension (3D) finite element analysis. With the help of the probabilistic method, the correlation between the centralizer thickness and the failure probability is investigated. Two examples on pipe-in-pipe pipeline system are analyzed. The first one presents the relationship between centralizer thickness and failure probability for inner and outer pipes. The second one is an application of six mile pipe-in-pipe pipeline system. The failure probability of the fatigue is estimated. The influence of the centralizer thickness decreasing with time due to the abrasion, creep wear and elastic deformation is also considered when computing fatigue life and failure probability. The maximum fatigue damage ratio is calculated based on all trial samples generated considering manufacturing tolerances. If the maximum fatigue damage ratio is less than or equal to the allowable fatigue damage ratio, the failure probabilities with respect to the given centralizer thickness is negligible and the design is acceptable if only considering the influence of the given centralizer thickness. In addition, numerical results show that the maximum fatigue damage ratio possibly exceeds the allowable fatigue damage ratio considering manufacturing tolerances although the deterministic fatigue damage ratio is less than the allowable fatigue damage ratio.

scholarly journals Sluice Safety Reliability Analysis - Application for Baovan Sluice in Vietnam

2019 ◽  
Vol 8 (10) ◽  
pp. 3473-3477
Keyword(s):  
Reliability Analysis ◽  
System Analysis ◽  
Calculation Model ◽  
Safety Factors ◽  
Factors Analysis ◽  
Reliability Calculation ◽  
Simulation Calculation ◽  
System Analysis Approach ◽  
Analysis Application ◽  
Definition Of

The article summarizes the irrigation works designing methods in Vietnam and other countries. While in Vietnamirrigation systemdesign method is deterministic and based on safety factors analysis, in other countries it’s popular with random design and reliability analysis. This is a modern design model and widely used in many fields in the world. Therefore, in this study, the authors presented how to develop sluice reliability calculation method under system analysis approach: definition of sluice s, problem tree, reliability functions for system simulation, calculation of reliability for works and works system, calculate reliability Bao Van sluice in Thanh Hoa province according to the introduced calculation model and proposie solutions to improve the reliability of the sluice if repaired or upgraded..

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