Optimization of Hyper Compressors Configuration and Related Plant Arrangement

2015 ◽  
Author(s):  
Carmelo Maggi ◽  
Leonardo Tognarelli ◽  
Stefano Giorgetti
Keyword(s):  
Dynamic Loads ◽  
Design Phase ◽  
Technical Aspects ◽  
Good Design ◽  
Engineering Company ◽  
Related Plant ◽  
Torsional Analysis ◽  
Technical Solutions ◽  
High Pressure Equipment ◽  
Critical Aspects

A good design of hyper compressors is heavily dependent by the good understanding of all critical aspects of the LDPE plant and on the implementation of appropriate technical solutions, during the design phase, to identify and resolve problems that may arise during the operation of the plant. The various aspects have to be investigated keeping in mind to reach an optimum performance in agreement with the customer’s requirements. The real effort is starting at the first design stages where all different departments are involved for dynamic loads acting on the foundation, the torsional analysis involving the motor supplier and the pulsation/vibration considerations interfacing the engineering company, the suppliers of high pressure equipment and the end users. All the stress levels, the pulsation and vibrations have to be minimized. Such results are influenced by the layout of the plant and the arrangement of the cranks of the compressor’s crank-shaft. This latter decision can improve the pulsation level, but affect the loads on the foundations. Here is the optimization of some technical aspects to be faced with the approval of all actors involved.

scholarly journals Experimental study of horizontal impact forces acting on equipment of thick sheet rolling stands during rolling

2018 ◽  
Vol 239 ◽  
pp. 01041 ◽  
Author(s):  
Anatoliy Ishchenko ◽  
Viktor Artiukh ◽  
Vladlen Mazur ◽  
Albina Calimgareeva ◽  
Miroslava Gusarova
Keyword(s):  
Experimental Data ◽  
Experimental Studies ◽  
Work Roll ◽  
Thick Sheet ◽  
Sheet Rolling ◽  
Technical Aspects ◽  
Rolling Mills ◽  
Impact Forces ◽  
Technical Solutions ◽  
Work Rolls

Technical aspects, methods and results of experimental studies of reversing rolling stands details horizontal accelerations of thick sheet rolling mills 3000 and 3600 are shown. Sequence of horizontal movements of bottom work roll with chocks in windows of housings during normal metal-in, steady rolling and metal-out is given. Usage of obtained experimental data and calculation of horizontal forces of work rolls chocks impacts against housings provided execution of stress calculations of technical solutions for increase of rolling stands durability.

scholarly journals Balancing Complex Social and Technical Aspects of Design: Exposing Engineering Students to Homelessness Issues

2020 ◽  
Vol 12 (15) ◽  
pp. 5917
Author(s):  
Diana A. Chen ◽  
Mark A. Chapman ◽  
Joel Alejandro Mejia
Keyword(s):  
Engineering Design ◽  
Engineering Students ◽  
Project Based Learning ◽  
User Needs ◽  
Solar Water Heater ◽  
User Centered Design ◽  
Water Heater ◽  
Technical Aspects ◽  
Non Profit ◽  
Technical Solutions

This paper describes the development and implementation of a classroom experience involving problem-based and project-based learning with community engagement in an engineering design context. While most User-Centered Design courses ask students to critically analyze and synthesize user needs, particularly of users who they see as “not like them”, our version is unique in having students wrestle with concepts of power, privilege, and oppression alongside developing prototypes that address sociotechnical aspects of engineering design that are rarely discussed in engineering courses. The course project described in this paper was developed to integrate issues of homelessness with engineering design. To achieve this goal, we partnered with a local non-profit organization that provides access to safe, mobile showers for our unhoused neighbors. Considering the context and needs of people who experience homelessness, students built solar water heater prototypes that integrated with the mobile shower units of our partners. Our goal with this course is to demonstrate to students that technical solutions are often insufficient for solving sociotechnical problems. In this case, the partnership with the non-profit organization was critical to conveying to students that engineering alone cannot solve homelessness.

Early decision-making for school building renovation

Facilities ◽  
2019 ◽  
Vol 37 (13/14) ◽  
pp. 981-994 ◽  
Author(s):  
Karin Farsäter ◽  
Stefan Olander
Keyword(s):  
Cultural Values ◽  
Teaching And Learning ◽  
Energy Use ◽  
Design Phase ◽  
Longitudinal Case Study ◽  
Content Type ◽  
Technical Status ◽  
School Renovation ◽  
Early Decision ◽  
Technical Solutions

Purpose The purpose of this study was to evaluate how decisions are taken in the early stages of a renovation project, up to the design brief, leading up to the decisions on how to proceed with the renovation in the design phase. Although many technical solutions are visualised in the design phase, it is in the early evaluations of needs and demands, leading up to the design brief, that set the requirements for viable solutions in the design and production phases. Design/methodology/approach The study was carried out as a longitudinal case study of the planning phases of a school renovation. The studied buildings were researched by document analysis and by attending meetings over a four-year period between the building owners and the municipality. Findings Aspects such as technical status, energy use and indoor environment in the buildings were not discussed to any great extent. A few inventories were carried out in the buildings to establish their technical and accessibility status. The aspects mainly discussed in the studied renovation project have been: accessibility, functionality with respect to teaching and learning requirements in addition to architectural and cultural values. Originality/value This study illustrates the comprehensive analysis needed when renovating a building and on difficulties of addressing and evaluating all the viable aspects of concern. It also shows that this planning for a renovation is not a straight line but rather a process where conditions are continuously changing.

Increasing Hot Rolling Mass of Steel Sheet Products

2016 ◽  
Vol 871 ◽  
pp. 3-8 ◽  
Author(s):  
Viktor Artiukh ◽  
Vladlen Mazur ◽  
Raghu V. Prakash
Keyword(s):  
Hot Rolling ◽  
Steel Sheet ◽  
Rolling Process ◽  
Dynamic Loads ◽  
Dynamic Forces ◽  
Sheet Products ◽  
Technical Solutions ◽  
Metal Delivery

The article exposes contemporary materials and structures for metallurgy. Feasible increase of dynamic forces on the rolling machinery during rolling of billets with masses up to 20 t (Stand No.1 of CWM 1700 HR, «U.S. Steel Košice», Košice, Slovakia, and PJSC «Illich MMPP», Mariupol, Ukraine) is discussed. It is proved that weight of billet, velocities of metal delivery to working rolls and rolling significantly influence the dynamic loads during metal biting. The technical solutions are suggested which would allow the steady rolling process of billets with masses up to 20 t and prevent accidental failures of frame parts, chocks and main lines.

scholarly journals Framework for resolving problems resulting from lean integration from the early design phases of production 3D printing machine

2021 ◽  
Vol 49 (2) ◽  
pp. 279-290
Author(s):  
Rabih Slim ◽  
Rémy Houssin ◽  
Amadou Coulibaly ◽  
Masih Hanifi ◽  
Hicham Chibane
Keyword(s):  
Cost Effectiveness ◽  
Design Methodology ◽  
3D Printer ◽  
Design Phase ◽  
Early Design ◽  
Machine Performance ◽  
Technical Solutions ◽  
Printing Machine ◽  
Early Design Phase

We focus on improving the performance of production machines (timesaving, flexibility, cost-effectiveness, safety) from the early design phase. Lean integration during the design phases might be a more appropriate solution, but this could be a source of some contradictions related to the machine performance and the usage requirements. In this paper, we propose an approach, based on Lean and Inventive Design Methodology (IDM-TRIZ), to identify and resolve these contradictions due to the Lean integration and also to provide innovative technical solutions. The approach is illustrated by the integration of the functionalities of the ''Single Minute of Exchange of Dies'' (SMED) and the ''5S'' method from the early design phase. A case study about the ''3D printer clogged nozzle'' outlines the feasibility of the proposed approach.

scholarly journals A Study of Convergence to Control the Cost of Concrete Bridges in the Design Stages in Yemen

2018 ◽  
Vol 4 (3) ◽  
pp. 539
Author(s):  
Majed Al-Sebaeai ◽  
Khalil Mohammed Al-Bukhaiti ◽  
Shixiong Zheng
Keyword(s):  
Cost Control ◽  
Software Tool ◽  
Concrete Bridges ◽  
Design Phase ◽  
The Road ◽  
Database Structure ◽  
The Republic ◽  
The Cost ◽  
Technical Solutions ◽  
The Impact

This research deals with the subject of concrete bridges projects cost control during the design phase. This research falls within the framework of the road bridges projects where cost control is used as a tool to help design and decision making.The objective of this study is to develop a methodology to control the cost of bridge projects during the early design stages, by investing the database with any helpful software tool, the proposed cost control methodology is based on modeling the original elements and proposing a method of cost estimate based on the estimate of quantities from general parameters of origin and prices be updated periodically. The proposed methodology studies the various technical solutions chosen by the designer and evaluates them economically.In this paper, a study was conducted on (12) bridges within the capital Sana’a bridges project and (7 bridges) those carried out in Sana’a-Aden road, by using the statistical program (SPSS) as a specialized program in this field, logical and theoretical issues have also been taken into account. Results that require us to study the design of the bridges based on a controlled database and applied to the case of cost and time, and on the impact of implementation risk on the cost of the project during the design phase, and the various models necessary to design a database structure that was enriched with information collected from different bridge projects were presented in the Republic of Yemen.

scholarly journals Numerical simulation of wave and wind effects on the anchoring system of a cage module for growing fish in marine areas

2020 ◽  
pp. 153-158
Author(s):  
Е.А. Тихонов ◽  
И.В. Григорьев ◽  
В.И. Базыкин ◽  
А.А. Шубин
Keyword(s):  
Vertical Component ◽  
Fish Farming ◽  
Technical Aspects ◽  
Patent Search ◽  
Anchoring System ◽  
Marine Areas ◽  
Archimedean Force ◽  
The Cost ◽  
Technical Solutions ◽  
New System

В представленной работе рассматриваются технические аспекты совершенствования конструкции садкового модуля для промышленного выращивания рыбы. Цель работы: уменьшение затрат на систему удержания положения садкового модуля на водоеме. Задача, которую необходимо решить для достижения данной цели заключается в разработке новой системы удержания садков с учетом их взаимодействия в едином модуле. Для решения данной задачи использован патентный поиск и анализ сильных и слабых сторон известных технических решений садков и их систем. Проанализированы недостатки так называемой «норвежской системы» удержания садковых модулей. Разработана система удержания садкового модуля, в которой не подразумевается использование круглозвенных цепей, а натяжение системы обеспечивается балансирами. Кроме того, в методику расчета введен учет вертикальной составляющей при расчете реакции опоры якоря, что позволило боле точно рассчитать необходимую массу якорей с учетом уменьшения силы трения и архимедовой силы. This paper discusses the technical aspects of improving the design of the cage module for industrial fish farming. Objective: to reduce the cost of the system for holding the position of the cage module on the reservoir. The task that needs to be solved to achieve this goal is to develop a new system for holding cages, taking into account their interaction in a single module. To solve this problem, we used patent search and analysis of the strengths and weaknesses of known technical solutions of cages and their systems. The disadvantages of the so-called "Norwegian system" for holding cage modules are analyzed. A system for holding the cage module has been developed, which does not imply the use of round-link chains, and the tension of the system is provided by balancers. In addition, the calculation method takes into account the vertical component when calculating the reaction of the anchor support, which made it possible to more accurately calculate the required mass of anchors, taking into account the reduction of the friction force and Archimedean force.

scholarly journals Anonymous Authentication

2011 ◽  
Vol 2 (2) ◽  
Author(s):  
Yehuda Lindell
Keyword(s):  
Computer Security ◽  
Basic Problem ◽  
Technical Aspects ◽  
Security Community ◽  
The Real ◽  
Anonymous Authentication ◽  
Internet Connections ◽  
Technical Solutions

In this paper, we study the seemingly paradoxical notion of anonymous authentication: authenticating yourself without revealing your identity. Before studying the technical aspects of anonymous Internet connections and anonymous authentication, we begin with a discussion of privacy and why it is important. Although the necessity of privacy is well accepted in the computer security community, the concrete reasons as to why are often not understood. We will demonstrate that such an understanding is crucial for providing technical solutions that solve the real problems at hand. Given this background, we briefly survey the known technologies for constructing anonymous Internet connections. Finally, we study how it is possible to achieve anonymous authentication (on top of anonymous Internet connections). We present definitions and a number of different protocols with different properties. In addition to the basic problem, we also show how it is possible (in a certain model) to achieve revocable anonymity, and explain why this is of importance.

scholarly journals Durability of cutter assemblies and its causative factors

2018 ◽  
Vol 6 (2) ◽  
pp. 358-369
Author(s):  
Alexandr Nekoz ◽  
Alexandr Nekoz ◽  
Oleksandr Venglovsky ◽  
Oleksandr Venglovsky ◽  
Alexandr Batrachenko ◽  
...  
Keyword(s):  
Raw Materials ◽  
Dynamic Loads ◽  
Operating Rules ◽  
Electric Driving ◽  
Determining Factors ◽  
Engineering Team ◽  
Static And Dynamic Loads ◽  
Technical Solutions ◽  
Technological University ◽  
Cutter Head

Cutter assemblies operate under stressful conditions: the knives are subjected to high dynamic loads, the cutter shaft rotates at a frequency of 5–100 s-1, the electric driving motor of the cutter shaft overcomes high starting moments, the bed is subjected to significant static and dynamic loads, the food raw materials and humid atmospheric air in the production room is corrosive to the structural elements, etc. Under the influence of these factors, the cutter assemblies break down, which causes unregulated pauses in food raw materials processing and also requires high expenses for equipment repair. The aim of the paper was to study the durability of the main cutter assemblies and to establish its main determining factors. The presented numerical values of durability of cutter assemblies have been obtained as a result of the planned, warranty and post-warranty practical maintenance of cutters by the engineering team of GEA FOOD SOLUTIONS UKRAINE, LLC, the mechanical supervisor staff of Cherkassk Food Company, LLC and also as a result of scientific research of the processes that provide the operation of these machines and that were carried out at the Cherkassy State Technological University (the Ukraine). The components that operate under the most stressful conditions are knives, a cutter shaft and its bearing assemblies, and the electric driving motor of the cutter shaft. At the same time, the durability of most cutter assemblies is limited by the quality of operation of the cutter head and the durability of the knives. The expenses for the repair or replacement of cutter assemblies can amount to tens of thousands of euros (not including the losses caused by equipment downtime). By applying the appropriate technical solutions and cutter system operating rules, it is possible to significantly improve the durability of a cutter and reduce these expenses.

Analysis of Different Configurations of Hybrid Fuel Cells System With Supercapacitors and Battery for Small Stationary Applications

2006 ◽  
Author(s):  
Stefano Cordiner ◽  
Francesco Pagliarini ◽  
Michele Prencipe ◽  
Fabio Romanelli
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte Fuel Cells ◽  
Uninterruptible Power Supply ◽  
Electric Power Grid ◽  
Start Up ◽  
Low Temperature Fuel Cells ◽  
Uninterruptible Power ◽  
Technical Solutions ◽  
Interesting Solution ◽  
Critical Aspects

The overall characteristics of electric power grid in terms of continuity of the supply and energy quality are of outmost importance for both industrial and civil applications with special attention to the uninterruptible ones. Net congestion problems are becoming more and more frequent boosting the development of small energy generation systems with back-up function. In this field low temperature fuel cells are an interesting solution addressing both environmental and efficiency issues. In the present work the application of Polymer Electrolyte Fuel Cells (PEFC) for an Uninterruptible Power Supply (UPS) system (<1kWe) is analysed by examining different possible technical solutions. This system is composed by a PEFC 1kWe stack, assisted by a set of battery and a supercapacitors pack, and using hydrogen stored into a metal hydride tank. Critical aspects as system start-up, response rapidity and autonomy are addressed to obtain an optimal configuration. Both numerical and experimental analysis have been carried out to characterize component behaviour. Once realized and tested, the system has proved to be able to work as UPS with an autonomy of 6.5 hours, only determined by hydrogen storage capability.

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