Mining Submersible Pump - Design, Characteristics and Protections

2014 ◽  
Vol 630 ◽  
pp. 99-108
Author(s):  
Andrzej Korczak ◽  
Grzegorz Peczkis ◽  
Tomasz Synowiec ◽  
Ievgenii Altyntsev
Keyword(s):  
Laboratory Tests ◽  
Security System ◽  
Numerical Calculations ◽  
Submersible Pump ◽  
Pump Design ◽  
Highly Efficient ◽  
Flow Channels ◽  
New Construction ◽  
Design Characteristics

This paper presents new construction of a submersible pump which is highly efficient due to the new solutions for flow channels. It includes the results of laboratory tests of the pump of the new construction. It also presents the results of numerical calculations of liquid’s movement in the flow channels of the pump, comparison of computing characteristics and characteristics measured in the laboratory.and an analysis of the essential parameters of the pump’s work which transgression could become a danger for the pump. In case of the danger the security system turns off the engine temporally or permanently.

Paper 26. Synchromesh Mechanisms: Experience of Heavy Truck Gearboxes

1969 ◽  
Vol 184 (9) ◽  
pp. 438-476 ◽  
Author(s):  
I. Rosen ◽  
S. Kruk ◽  
P. O. Eker ◽  
H. Mellgren
Keyword(s):  
Future Development ◽  
Laboratory Tests ◽  
Heavy Truck ◽  
Design Characteristics

The design characteristics of different synchronizers with comparisons of designs, performance, and dependability in operation are discussed. The theory of operation is dealt with in detail. The influence of experience in practice on design from the effects of clash, hard gear changing, wear, clutch and oil drag are included. Suitable materials, machinery processes, and interdependence of dimensions are described. The paper concludes with notes on practical and laboratory tests and future development.

scholarly journals Electrical Submersible Pump Design in Vertical Oil Wells

2020 ◽  
Vol 4 (4) ◽  
pp. 1-7
Author(s):  
Gomaa S
Keyword(s):  
Oil Wells ◽  
Maintenance Cost ◽  
Oil Well ◽  
Submersible Pump ◽  
Reservoir Properties ◽  
Pump Design ◽  
Artificial Lift ◽  
Complete Study ◽  
Electrical Submersible Pump

Artificial Lift is a very essential tool to increase the oil production rate or lift the oil column in the wellbore up to the surface. Artificial lift is the key in case of bottom hole pressure is not sufficient to produce oil from the reservoir to the surface. So, a complete study is carried to select the suitable type of artificial lift according to the reservoir and wellbore conditions like water production, sand production, solution gas-oil ratio, and surface area available at the surface. Besides, the maintenance cost and volume of produced oil have an essential part in the selection of the type of artificial lift tool. Artificial lift tools have several types such as Sucker Rod Pump, Gas Lift, Hydraulic Pump, Progressive Cavity Pump, Jet Pump, and Electrical Submersible Pump. All these types require specific conditions for subsurface and surface parameters to apply in oil wells. This paper will study the Electrical Submersible Pump “ESP” which is considered one of the most familiar types of artificial lifts in the whole world. Electrical Submersible Pump “ESP” is the most widely used for huge oil volumes. In contrast, ESP has high maintenance and workover cost. Finally, this paper will discuss a case study for the Electrical Submersible pump “ESP” design in an oil well. This case study includes the entire well and reservoir properties involving fluid properties to be applied using Prosper software. The results of the design model will impact oil productivity and future performance of oil well.

Onset of Scour Below Pipeline Under Combined Waves and Current

2010 ◽  
Author(s):  
Zhipeng Zang ◽  
Liang Cheng ◽  
Ming Zhao
Keyword(s):  
Numerical Model ◽  
Pressure Drop ◽  
Empirical Model ◽  
Empirical Formula ◽  
Laboratory Tests ◽  
Numerical Results ◽  
Numerical Calculations ◽  
Submarine Pipeline ◽  
Oscillatory Flows ◽  
Steady Current

Onset of scour below a submarine pipeline under waves and current is studied experimentally and numerically in this paper. A series of laboratory tests were conduced in a mini O-tube (MOT) facility to investigate the onset conditions of scour below a pipeline subject to oscillatory flows superimposed on a steady current. The effect of parameter α, which is defined as α = Uc/(Uc+Uw), on the onset of scour under combined waves and current was investigated and a simple empirical formula for evaluating the criterion for onset of scour is presented. The numerical calculations were carried out to simulate the onset of scour using a calibrated numerical model. The pressure drop coefficient over a pipe under combined waves and current was studied. The effectiveness and accuracy of the empirical model was calibrated by the numerical results.

Experimental Tests of an Electromechanical Transducer of Reverse Linear Motion into Electrical Energy

2013 ◽  
Vol 208 ◽  
pp. 86-92 ◽  
Author(s):  
Marcin Węgrzynowski ◽  
Mateusz Romaszko
Keyword(s):  
Electromotive Force ◽  
Laboratory Tests ◽  
Mr Damper ◽  
Experimental Tests ◽  
Electrical Energy ◽  
Current Strength ◽  
Numerical Calculations ◽  
Linear Motion ◽  
Instantaneous Power ◽  
Electromechanical Transducer

This document deals with the results of laboratory tests of an experimental electromechanical transducer for supplying an magnetorheological (MR) damper. The aim of the tests was to determine: the electromotive force induced in the sectionalized coil, the voltage and the current strength in the control coil of the damper as well as instantaneous power. The results provided are based on the tests of the transducer under periodic kinematic excitations and are compared with those achieved in numerical calculations.

A Single-Stage Centripetal Pump—Design Features and an Investigation of the Operating Characteristics

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
Mihael Sekavčnik ◽  
Tine Gantar ◽  
Mitja Mori
Keyword(s):  
Single Stage ◽  
Flow Conditions ◽  
Operating Characteristics ◽  
Cfd Simulations ◽  
Pump Design ◽  
Flow Channels ◽  
Performance Curves ◽  
Computational Fluid Dynamics Cfd ◽  
Working Media ◽  
Inflow Conditions

In this paper, we present an experimental and numerical investigation of a single-stage centripetal pump (SSCP). This SSCP is designed to operate in the pump regime, while forcing the working media through impeller-stator flow channels in the radial inward direction. The measured performance curves are characterized by a hysteresis, since the throttle-closing performance curves do not correspond to the throttle-opening performance curves throughout the whole operating range. A computational fluid dynamics (CFD) model was developed to establish these throttle-closing and throttle-opening performance curves. The flow conditions obtained with the CFD simulations confirm that the hydraulic behavior of the SSCP is influenced by the partial circumferential stall that occurs in the impeller-stator flow channels. It was shown that the inflow conditions to the impeller-stator assembly considerably influence the flow rate of the stall cessation, the size of the hysteresis, and the head generated during part-load operations.

Influence Imperfections on the Difference between the Numerical and Experimental Investigations of a Punching in the Central Slab-Column Connections of RC Structures

2015 ◽  
Vol 769 ◽  
pp. 264-269
Author(s):  
Barbara Wieczorek
Keyword(s):  
Numerical Model ◽  
Laboratory Tests ◽  
Progressive Collapse ◽  
Numerical Calculations ◽  
Experimental Investigations ◽  
Material Models ◽  
Rc Structures ◽  
Non Linear ◽  
Australian Standard ◽  
The Difference

This paper presents the results of laboratory tests concerning the central connection of the slab with the column, in which an additional reinforcement ensuring the structure against a progressive collapse was applied as to recommended in the standard PN-EN 1991-1-7:2008 as well as in PN-EN 1992-1-1:2008. Regulations concerning the necessity of such a reinforcement are also contained in the American and Australian standard as well as in the Bulletin FIB. The obtained results of investigations have been compared with calculations based on a spatial numerical model representing the analyzed phenomenon. The numerical model bases on predefined material models of steel and concrete, taking into account non-linear dependences of the strength of these materials. The values of displacements of the upper surface of the slab depending on the exerted load were compared with the values of numerical calculations.

scholarly journals Engineering Graphical Captcha and AES Crypto Hash Functions for Secure Online Authentication

2021 ◽  
Author(s):  
Nafisah Kheshaifaty ◽  
◽  
Adnan Gutub ◽  
Keyword(s):  
Hash Function ◽  
Hash Functions ◽  
Security System ◽  
Graphical Password ◽  
Online Security ◽  
Highly Efficient ◽  
Authentication And Security ◽  
Authentication Technique

Password alone is currently not trusted for user online authentication and security as threats from hackers continue to grow, requiring highly efficient defense safeguard protection against unauthorized users. Therefore, CAPTCHA techniques came into the picture as an automated assistance to distinguish between humans and robots. The CAPTCHA has several applications in the online security domain requiring to be merged with encrypted hash function benefitting from the facility of the graphical password schemes. This paper proposes engineering an authentication technique using graphical CAPTCHA with an AES encrypted hash password to maintain applicable security accessing systems. We propose three layered security system that joins highly efficient security mechanisms to avoid users’ stress of entering password many times or different other hectic routines in order to save account accessing.

Weight reduction of the train by applying a new construction and testing process of the train car bogie

2017 ◽  
Vol 232 (8) ◽  
pp. 1481-1492
Author(s):  
Adam Lipski ◽  
Michał Piotrowski ◽  
Stanisław Mroziński
Keyword(s):  
Laboratory Tests ◽  
Experimental Studies ◽  
Input Function ◽  
Fatigue Tests ◽  
Railway Vehicle ◽  
Research Systems ◽  
New Construction ◽  
Load Variable ◽  
Design And Testing ◽  
Test Objects

The algorithms and procedures of the train car bogie design which have been used so far are mainly based on the iterative approach: theoretical modeling—experimental studies of entire structures, until the assumed life is achieved. Such approach usually results in over-designing of the structure and the need for numerous expensive laboratory tests. Depending on the scale and nature of the object, more or less complex research systems are used for that purpose, but in the case of primary structures of the means of transport, usually multi-axial stands are used to apply load variable in time corresponding to the input function adopted in the design process. This approach is very costly, which is mainly caused by a high cost of preparing test objects for fatigue tests and a high cost of fatigue tests performed by using multi-axial testing stands. It should be noted that because of the nature of the fatigue, drawing conclusion on the correctness of the developed structure based on individual trials is associated with a significant uncertainty. Therefore it is often necessary to perform at least a few repetitions of fatigue tests. Thus there is a need to develop the design and testing methodology for complex technical objects such as bogies of railway vehicles, in order to limit the costs of research. The paper presents the proposal of method by which it is possible to optimize weight of railway vehicle bogies while limiting of costs of research by reducing the costs of test objects and the complexity of the test stand.

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