scholarly journals The software module for evaluation of the failure probability of the well electric submersible pump installation

2020 ◽  
pp. 55-66
Author(s):  
Aleksei Danilko ◽  
◽  
Oleg Stukach ◽  
◽  
Keyword(s):  
Failure Probability ◽  
Production Efficiency ◽  
Production Control ◽  
Operation Mode ◽  
Main Tool ◽  
High Rate ◽  
Software Module ◽  
Pump Operation ◽  
Operating Modes ◽  
Submersible Electric Pump

Submersible electric pump installations (ESP) are the main tool of oil production due to the high rate of the oil deposits development. Improving of the production efficiency using ESP is an urgent problem for the oil industry. Failures of installations are caused by many factors, some of them are salts. Water contained in the oil is oversaturated by sparingly soluble salts. It can precipitate in the form of scale at heating. It leads to the gradual decrease of the pump pipe diameter and consequently decreasing of production. In this case, the pump operation mode may be failed. Timely shutdown of the pump for well repair before failure can significantly reduce costs, as well as prevent critical damage of all equipment. But such type of failure as the salt deposition is difficult to perceive, and subsequent repair involve aggressive acid flushing. Reverse situation is connected with maximization of the turnaround maintenance. Therefore, for operators of production control centers it is important to have an information of the failure probability for certain parameters at a given time points. At present, datasets on the technical operating modes for equipment are saved by special software of the digital support platform. Nevertheless calculations of the probabilistic characteristics are not presented. Based on Bayesian estimates, we propose to obtain evaluation of the failure probability in order to support of the evidence monitoring of the wells operation and generate a control impact in case of the critical probability of failures.

scholarly journals Improving the operational efficiency of the linear type peristaltic pump

2020 ◽  
Vol 1 (4) ◽  
pp. 16-24
Author(s):  
A.I. Grishin ◽  
Keyword(s):  
Poisson’S Ratio ◽  
Numerical Experiments ◽  
Reverse Flow ◽  
Operation Mode ◽  
Elastic Tube ◽  
Poisson's Ratio ◽  
Maximum Efficiency ◽  
Peristaltic Pump ◽  
Linear Type ◽  
Pump Operation

The paper investigates the effect on the linear peristaltic pump operation of the properties of the material of its elastic tube, the algorithm of actuation of the release elements, as well as the presence of irregularities in the inlet and outlet sections of the pump in the form of alternating confusers and sudden expansions. To study the influence of these factors, a series of numerical experiments was carried out using the universal software STAR-CCM +, where the pump operation was simulated by a joint calculation of the fluid flow and elastic deformations of its tube. As a result of numerical experiments for a number of values of Poisson's ratio, it was found that the material of the pump tube must be selected with the lowest possible Poisson's ratio in order to obtain the highest efficiency. The study of possible algorithms for the actuation of the release elements of the pump showed that in order to obtain the maximum efficiency, the pump operation mode should be select-ed in accordance with the drive design. The drive, where energy is expended only on the movement of the release elements, requires the mode with the first release elements to hold the tube in a com-pressed state longer, which provides a higher feed value. For the drive, where energy is spent on maintaining the tube in a compressed state, the preferred mode is the one with the delay in the re-turn of the release element to its original state is minimal. As a result of studying the influence of sections with irregularities, it was found that the use of the height and pitch of irregularities, when the ratio of the resistances of these sections in the forward and reverse flow is optimal, leads to a decrease in the flow and pressure of pump.

Light guide systems enhance microalgae production efficiency in outdoor high rate ponds

2020 ◽  
Vol 47 ◽  
pp. 101846 ◽  
Author(s):  
Shwetha Sivakaminathan ◽  
Juliane Wolf ◽  
Jennifer Yarnold ◽  
John Roles ◽  
Ian L. Ross ◽  
...  
Keyword(s):  
Production Efficiency ◽  
Light Guide ◽  
High Rate

Research on Setting Calculation Dynamic Partitioning Based on Data Center

2013 ◽  
Vol 373-375 ◽  
pp. 1318-1323
Author(s):  
Xiao Bo Wang ◽  
Wei Song ◽  
Ren Min Gong ◽  
De Jun He
Keyword(s):  
Data Center ◽  
Operation Mode ◽  
Equivalent Model ◽  
Common Information ◽  
Operating Modes ◽  
Dynamic Partitioning ◽  
Common Information Model ◽  
Improve Calculation ◽  
Minimum Operating ◽  
Setting Calculation

This paper deals with the setting calculation data center (SCDC), which is based on Common Information Model (CIM). The construction consists of data splicing and graphics stitching. The splicing method of the information related to setting calculation gains more attention, especially the operation mode. Further more, it brings up a method called dynamic partitioning to improve calculation efficiency. It gives a proper element range relying on the maximum and the minimum operating modes provided by the grid. We only need to consider the network elements in this range to involve in setting calculation. Out of this range we use a simplified equivalent model. At last, the effectiveness and accuracy of the algorithm are verified by the result of the practical example and it is reasonable and effective in its application in engineering.

Screen Printing Equipment Control System Design Based on PLC

2013 ◽  
Vol 415 ◽  
pp. 180-183
Author(s):  
Yun Long Yuan ◽  
Hong Cheng
Keyword(s):  
Control System ◽  
Screen Printing ◽  
Production Efficiency ◽  
Operation Mode ◽  
High Strength ◽  
Production Test ◽  
Action Execution ◽  
Plc Control ◽  
Stable Performance ◽  
Low Efficiency

For the traditional operation mode of high strength, low efficiency in the process of the plastic ruler screen printing, the powerful PLC is used as the control core, the automatic PLC control system is developed, and the reasonable programming skills are applied so that the two institutions can work in parallel, which greatly improves the production efficiency. At the same time, sophisticated sensors are used to detect each action execution state so as to ensure that work is reliable with stable performance. Through actual production test, the printing speed has reached the capacity of 28 rulers on average per minute, and has achieved the good production benefit.

SPECIAL SECTION: Users as Designers: How People Cope with Poor HCI Design in Computer-Based Medical Devices

1996 ◽  
Vol 38 (4) ◽  
pp. 574-592 ◽  
Author(s):  
Jodi Heintz Obradovich ◽  
David D. Woods
Keyword(s):  
Medical Devices ◽  
Preterm Labor ◽  
Special Section ◽  
Operation Mode ◽  
Operating Modes ◽  
Infusion Device ◽  
Poor Differentiation ◽  
Computer Based ◽  
Getting Lost ◽  
And Behavior

In this paper we examine how users interact with a computer-based infusion device adapted for terbutaline infusion to treat preterm labor in women experiencing high-risk pregnancies. This study examines (a) the human-computer interaction (HCI) deficiencies in the device as related to this context of use, (b) how the device characteristics increase the potential for error, and (c) the tailoring strategies developed by users to insulate themselves from failure. Interviews with nurses and tests of the behavior of the infusion device in different conditions identified several classic HCI deficiencies: complex and arbitrary sequences of operation, mode errors caused by poor differentiation of multiple operating modes intended for different contexts, ambiguous alarms, getting lost in multiple displays, and poor feedback on device state and behavior.

scholarly journals Influence of the Condition of the Exposed Electrode Edge in the SDBD on the Discharge Operation Mode in Argon

2021 ◽  
Vol 2100 (1) ◽  
pp. 012014
Author(s):  
I Selivonin ◽  
I Moralev
Keyword(s):  
Electrode Materials ◽  
Phenomenological Study ◽  
Operation Mode ◽  
Surface Barrier ◽  
Operating Modes ◽  
Copper Electrodes ◽  
Key Factor ◽  
Discharge Operation ◽  
Electrode Edge ◽  
Aluminum Electrodes

Abstract The paper is devoted to the phenomenological study of the operating modes of a surface barrier discharge in argon in the case of treated by the discharge and new aluminum and copper electrodes. It is shown that without preliminary treating of the edges of the electrodes in the case of copper and aluminum electrodes, the discharge has a different spatial structure determined by the self-organization of the DBD. After erosion cleaning of the electrode edges, the identical operating modes are established. Such effects confirm the former assumption that the key factor determining the mode of the discharge operation for various electrode materials is the surface charge built on the oxides deposited on the edge. The different dynamics of oxides in the case of copper and aluminum electrodes is determined by the resistance of the oxides of these metals to sputtering, which is indirectly confirmed by the estimation of the binding energy for these materials.

scholarly journals A probabilistic approach to include the overall efficiency of gas-fired heating systems in urban building energy modelling

2021 ◽  
Vol 2069 (1) ◽  
pp. 012105
Author(s):  
K Ritosa ◽  
I De Jaeger ◽  
D Saelens ◽  
S Roels
Keyword(s):  
Energy Demand ◽  
Production Efficiency ◽  
Production Control ◽  
Probabilistic Approach ◽  
Heating System ◽  
Building Energy ◽  
Heating Systems ◽  
Energy Modelling ◽  
Gross Energy ◽  
Overall Efficiency

Abstract Urban building energy modelling has an essential role in the estimation of energy demand at urban or neighbourhood scales. However, current modelling methods have limitations in reproducing realistic gross energy usage. Although it is theoretically possible to simulate all components of the heating system in detail, such an extensive approach significantly increases the computational effort, prohibiting a large scale probabilistic analysis. As an alternative, this paper presents a simplified data-driven approach to estimate the overall efficiency for the six most occurring gas-fired heating system configurations in Flemish single-family dwellings. For all configurations, efficiencies of emission, distribution, production, control and storage components are taken into account, of which the efficiency of the production unit is modelled most in detail as it includes the load-dependency. The approach is applied to a sample of 20 dwellings reflecting realistic variation in size, insulation quality and occupancy schedules. For all dwellings and the different heating systems the resulting annual production efficiency, and monthly heating systems’ efficiency as a function of gross energy demand are shown based on the 25th, 50th and 75th percentile.

scholarly journals Optimization of daily operation mode of photovoltic systems of enterprises

2021 ◽  
Vol 264 ◽  
pp. 04063
Author(s):  
Tulkin Gayibov ◽  
Elnur Abdullaev
Keyword(s):  
Mathematical Model ◽  
Renewable Energy Sources ◽  
Operation Mode ◽  
Distribution Networks ◽  
Photovoltaic System ◽  
Optimal Parameters ◽  
Manufacturing Enterprises ◽  
Operating Modes ◽  
Mode Of Operation ◽  
The Mathematical Model

At present, one of the most important issues at the level of various manufacturing enterprises is the development of ways for building and efficiently using renewable energy sources, especially solar energy. In this regard, this article proposes a mathematical model of the problem of determining the optimal daily mode of operation of a photovoltaic system in an enterprise with a private photovoltaic system connected to the electrical system. The effectiveness of the mathematical model was analyzed on the example of determining the optimal mode of operation of the photovoltaic system located on the territory of Jizzakh Polytechnic Institute. It is shown that the mathematical model can be used to determine the optimal operating modes of existing photovoltaic systems in enterprises and distribution networks, as well as to determine the optimal parameters in their design.

scholarly journals Measurements of Discharge through a Pump-Turbine in Both Flow Directions Using Volumetric Gauging and Pressure-Time Methods

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4706
Author(s):  
Adam Adamkowski ◽  
Waldemar Janicki ◽  
Mariusz Lewandowski
Keyword(s):  
Operation Mode ◽  
Detailed Comparison ◽  
Pump Operation ◽  
Special Procedure ◽  
Pressure Time ◽  
Mode Of Operation ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Directions ◽  
The Impact ◽  
Low Uncertainty

This article presents the original procedures for measuring the flow rate using the pressure-time and the volumetric gauging method in the case of performance tests of a reversible hydraulic machine in either turbine or pump modes of operation. Achieving the lowest possible measurement uncertainty was one of the basic conditions during implemented machine tests. It was met using appropriate measuring procedures and high-class measuring equipment. Estimation of the uncertainty for both methods was made on the basis of an analysis consistent with current requirements in this respect. The pressure-time method was supplemented by the computational fluid dynamics (CFD) analysis that allowed reducing the impact of the pipeline complex irregular geometry on the uncertainty of flow measurement. Appropriate modifications of the calculation procedure enabled accurate measurements of flow during the pump mode of operation of the tested machine as well. The volumetric gauging method, thanks to a special procedure used for accurate measurement of the water level in the upper reservoir of the power plant, allowed measuring the discharge through the tested reversible machine with very low uncertainty. The obtained results allowed for a detailed comparison and mutual verification of the methods used to measure the discharge of the tested reversible machine in both modes of its operation. The most possible causes of obtained results are discussed and summarized in the paper. The need for further research was pointed out to explain the differences obtained and their influence on the accuracy of discharge measurement using the pressure-time method in pump operation mode.

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