A Case Study Aiming to Mitigate Pipe Vibrations Using CFD and Dynamic Stress Analysis Approach

2020 ◽  
Author(s):  
Amar Phatak ◽  
Gaurav Bhende ◽  
Nilesh Mane
Keyword(s):  
Flow Simulation ◽  
Steel Structure ◽  
Design Stage ◽  
Operating Personnel ◽  
Real Risk ◽  
Depth Analysis ◽  
Process Plants ◽  
The Times ◽  
Engineering Practices

Abstract Piping vibrations in process plants are rarely analyzed or anticipated correctly during the ‘design Stage’. Most of the times ‘in -depth’ analysis is not carried out during ‘design stage’ except following few good engineering practices. As a result, few pipes can show excessive vibrations during operations that fall under the ‘danger’ zone. The vibrating pipe transfers the vibrations to the steel structure and these vibrations are experienced by operating personnel causing a ‘safety hazard’. The real risk is loss of containment due to unacceptable vibrations and eventual fatigue failure of pipe and or structure. The reason resulting in vibrations can be connection of pipe with rotating equipment, the vibration of structure on which the pipe is supported, flow inside the pipe, noise level or slug / water hammer. Here, the authors present a case study of a vibrating pipe beyond the accepted limit and how the pipe vibrations which are being transferred to supporting platform are minimized. The analytical results obtained by software simulations are benchmarked against actual readings measured at the site. The paper also provides the mathematics and its application to solve a practical vibration problem. It provides a systematic approach starting from generic calculations until a detailed flow simulation. In the end, it provides guidelines to select rubber and viscous dampers. The innovative part of the case study is the usage of specially designed rubber mounds which have yet not been used for pipe vibrations.

scholarly journals Assessing the Real Risk of Mining Industry Environmental Impact. Case Study

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Wiktoria SOBCZYK ◽  
Koji Cristobal Ishimi PERNY ◽  
Eugeniusz SOBCZYK
Keyword(s):  
Water Cycle ◽  
Groundwater Resources ◽  
Mining Industry ◽  
Mining Operations ◽  
Analytic Hierarchy ◽  
The Real ◽  
Real Process ◽  
Real Risk ◽  
Depth Analysis

The aim of this article is to analyse the real risk that mining operations pose to the environment, including all the main concernsrelated to the project's planned operations and their environmental impacts. In order to carry out an in-depth analysis of a practicalcase involving the real process of mineral extraction, we use the Analytic Hierarchy Process (AHP) and Leopold matrix as a methodof measurement. The subject of the investigation is the extraction of lithium from natural brine located in South America's so-calledLithium Triangle, in the geographical limits of Argentina, Bolivia and Chile, where more than 80% of the world's lithium reserves arelocated. The case study showed that the elements of the environment most exposed to mining activities are the biosphere, lithosphereand hydrosphere. The vast areas of the mining company are covered by sedimentary ponds with brine. Pumping the brine to the surface results in a loss of groundwater resources and, consequently, changes the water cycle in the catchment area. The habitats of aquaticand terrestrial fauna and flora are significantly changed or irretrievably damaged.

Sistem Dakwah Pondok Pesantren At-Tawazun dalam Mengatasi Problematika Santri

2017 ◽  
Vol 2 (4) ◽  
pp. 329-346
Author(s):  
Iyam Marhamah ◽  
Yaya Yaya ◽  
Asep Sodiqin
Keyword(s):  
Output Feedback ◽  
Field Research ◽  
Education Institution ◽  
Boarding School ◽  
Qualitative Approach ◽  
Young Generation ◽  
Case Study Method ◽  
The Times ◽  
Considerable Benefit

Tulisan ini bertujuan untuk menggambarkan sistem dakwah Pondok Pesantren At-Tawazun ditinjau melalui sistem terbuka mulai dari tahap input, conversion, output, feedback, hingga environment dalam upaya mengatasi problematika santri yang dipengaruhi oleh perkembangan zaman. Penelitian yang dilakukan ini menggunakan metode studi kasus dengan pendekatan kualitatif dan spesifikasi penelitian field research (penelitian lapangan). Hasil penelitian ini menunjukkan bahwa keberadaan pondok pesantren At-Tawazun dirasakan cukup besar manfaatnya oleh orang tua maupun masyarakat. Lembaga dakwah dan pendidikan ini telah ikut berkontribusi dalam menanggulangi masalah sosial dan kenakalan remaja yang semakin rumit, sehingga mampu memberikan lulusan santri yang brakhlak, berbudi luhur dan mampu mengamalkan ilmunya di masyarakat. Lebih dari itu, kehadiran pondok pesantren At-Tawazun diharapkan dapat mengatasi akulturasi budaya yang menyimpang di era sekarang ini. Sehingga semangat generasi muda kita dapat disalurkan terhadak hal-hal positif, untuk kemajuan Agama dan Negara. This paper aims to describe the da’wah system of At-Tawazun Islamic Boarding School through an open system starting from the input, conversion, output, feedback, and environment stages in an effort to overcome the problems of santri that are influenced by the times. This research uses case study method with qualitative approach and field research specification (field research). The results of this study indicate that the existence of the At-Tawazun Islamic Boarding Scool was felt to be of considerable benefit by parent and community. This da’wah and education institution has contributed to tackling social problems and juvenile delinquency that are increasingly complicated, so as to be able to provide graduates who are morally, virtous and able to practice their knowledge in the community, moreover, the presence of the At-Tawazun Islamic Boarding School is expected to overcome the deviant cultural acculturation in the present era. So that the spirit of our young generation can be channeled suddenly to positive things, for the advancement of Religion and the state.

scholarly journals Preventing Dampness Related Health Risks at the Design Stage of Buildings in Mediterranean Climates: A Cyprus Case Study

Buildings ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 66
Author(s):  
Ugochukwu Elinwa ◽  
Cemil Atakara ◽  
Ifeoluwa Ojelabi ◽  
Abiola Abiodun
Keyword(s):  
Health Risks ◽  
Design Stage

Planning and maintenance of urban architectural environmental color—A case study of xingning traditional block in nanning city

2021 ◽  
pp. 002072092098467
Author(s):  
Lu Zhang ◽  
Zhenghong Peng
Keyword(s):  
Vital Role ◽  
Architectural Style ◽  
Unique Color ◽  
Architectural Features ◽  
City District ◽  
Urban Planning And Development ◽  
Systematic Planning ◽  
The Times ◽  
The City

As the most historically and culturally valuable city district in Nanning, Xingning Block has gradually formed its own unique color characteristics and architectural style in the slow process of urban historical development, showing the unique local customs and architectural features. However, restricted by the specific development conditions, many undesirable aspects can be found in the overall architectural landscape color of some nodes on the block, such as lack of systematic planning, poor material matching, messy building color, as well as various challenges of contemporary social development to the architectural environmental color on the block.The architectural environmental color of urban traditional blocks is an important part of the specific history, culture and spirit of the times of a city, which plays a vital role in the development and change of the city. Therefore, how to effectively and reasonably do a good job in sustainable urban planning and development is an issue that must attract the attention of competent authorities at all levels, scientific research institutions and planning practitioners.

scholarly journals Towards Regulatory-Compliant MLOps: Orazivio’s Journey from a Machine Learning Experiment to a Deployed Certified Medical Product

2021 ◽  
Vol 2 (5) ◽  
Author(s):  
Tuomas Granlund ◽  
Vlad Stirbu ◽  
Tommi Mikkonen
Keyword(s):  
Machine Learning ◽  
Joint Replacement ◽  
Medical Product ◽  
Medical Software ◽  
Continuous Delivery ◽  
Development Approach ◽  
Responding To Change ◽  
Agile Software ◽  
Engineering Practices

AbstractAgile software development embraces change and manifests working software over comprehensive documentation and responding to change over following a plan. The ability to continuously release software has enabled a development approach where experimental features are put to use, and, if they stand the test of real use, they remain in production. Examples of such features include machine learning (ML) models, which are usually pre-trained, but can still evolve in production. However, many domains require more plan-driven approach to avoid hazard to environment and humans, and to mitigate risks in the process. In this paper, we start by presenting continuous software engineering practices in a regulated context, and then apply the results to the emerging practice of MLOps, or continuous delivery of ML features. Furthermore, as a practical contribution, we present a case study regarding Oravizio, first CE-certified medical software for assessing the risks of joint replacement surgeries. Towards the end of the paper, we also reflect the Oravizio experiences to MLOps in regulatory context.

scholarly journals Resituating the political in cultural intermediary work: Charity sector public relations and communication

2021 ◽  
pp. 136754942199423
Author(s):  
Anne M Cronin ◽  
Lee Edwards
Keyword(s):  
Public Relations ◽  
Power Relations ◽  
Party Politics ◽  
The Political ◽  
Depth Analysis ◽  
Cultural Intermediary ◽  
Cultural Intermediaries ◽  
The Uk ◽  
The Relationship

Drawing on a case study of public relations in the UK charity sector, this article argues that cultural intermediary research urgently requires a more sustained focus on politics and the political understood as power relations, party politics and political projects such as marketization and neoliberalism. While wide-ranging research has analysed how cultural intermediaries mediate the relationship between culture and economy, this has been at the expense of an in-depth analysis of the political. Using our case study as a prompt, we highlight the diversity of ways that the political impacts cultural intermediary work and that cultural intermediary work may impact the political. We reveal the tensions that underpin practice as a result of the interactions between culture, the economy and politics, and show that the tighter the engagement of cultural intermediation with the political sphere, the more tensions must be negotiated and the more compromised practitioners may feel.

Method for Redesign of District Heating Networks within Transition from the 2nd to the 3rd Generation

2014 ◽  
Vol 657 ◽  
pp. 689-693
Author(s):  
Răzvan Corneliu Lefter ◽  
Daniela Popescu ◽  
Alexandrina Untăroiu
Keyword(s):  
District Heating ◽  
Design Stage ◽  
Heating Systems ◽  
Load Duration ◽  
Load Duration Curve ◽  
District Heating Systems ◽  
Consumption Rates ◽  
Heat Loads ◽  
Heating Networks

Important investmentsare made lately in the area of district heating, as a technology capable ofhelping countries to reach sustainability goals. In Romania, European fundswere spent for transition from the 2nd to the 3rdgeneration of district heating systems. The lack of appropriate monitoringsystems in old district heating systems makes optimisation nowadays very difficult,especially because nominal values used in the first design stage areoverestimated. Realistic nominal heat loads are necessary to make goodestimations of hydraulic parameters to be used for redesign. This studyproposes a method that uses the heat load duration curve theory to identify theappropriate nominal heat loads to be used for redesign. Comparison betweenresults obtained by applying the nominal heat loads of each consumer, as theywere established in the first design stage, and the ones identified by theproposed method are analyzed in a case study. The results show that errors arein the +/- 3% band, between the metered heat consumption rates and the proposedrates. The new method can be used for the sizing of pumps and district heatingnetworks after retrofit, in order to get better adjustments of the circulationpumps and increase of the energy efficiency.

Study on the impacts of peaking factors on a water distribution system in Germany

2010 ◽  
Vol 10 (2) ◽  
pp. 165-172 ◽  
Author(s):  
K. Diao ◽  
M. Barjenbruch ◽  
U. Bracklow
Keyword(s):  
Energy Consumption ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Water Distribution Network ◽  
Design Stage ◽  
Water Age ◽  
Specific System ◽  
Average Water

This paper aims to explore the impacts of peaking factors on a water distribution system designed for a small city in Germany through model-based analysis. As a case study, the water distribution network was modelled by EPANET and then two specific studies were carried out. The first study tested corresponding system-wide influences on water age and energy consumption if the peaking factors used at design stage are inconsistent with ones in real situation. The second study inspected the possible relationship between the choice of peaking factors and budgets by comparing several different pipe configurations of the distribution system, obtained according to variety of peaking factors. Given the analysis results, the first study reveals that average water age will increase if peaking factors estimated at design stage are larger than real values in that specific system, and vice versa. In contrast, energy consumption will increase if peaking factors defined for system design are smaller than ones in real case, and vice versa. According to the second study, it might be possible to amplify peaking factors for design dramatically by a slight increase in the investment on this system. However, further study on budget estimation with more factors and detailed information considered should be carried out.

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