Introducing pressure and number of connections into water loss indicators for French drinking water supply networks

2014 ◽  
Vol 14 (6) ◽  
pp. 1105-1111 ◽  
Author(s):  
E. Renaud ◽  
M. Clauzier ◽  
A. C. Sandraz ◽  
J. Pillot ◽  
D. Gilbert
Keyword(s):  
Water Loss ◽  
Performance Indicators ◽  
Performance Indicator ◽  
The Other ◽  
System Level ◽  
Average Pressure ◽  
Supply Networks ◽  
Water Supply Networks ◽  
District Metered Area ◽  
New System

In France, the system of performance indicators defined within the relevant regulations does not include indicators relating to pressure, or the number of connections. So, Irstea and Veolia Water decided to create a new system of water loss indicators designed for use in France and that would take into account these parameters. The study was initially carried out at District Metered Area (DMA) level. These analyses showed the advantages of considering the ratio of losses to number of connections, but did not highlight a significant link between water loss levels and average pressure. After that, using a module that automatically calculates average pressure based on an EPAnet model of a network, it was possible to carry out a study at the system level. The results at the system scale were similar to those obtained at the DMA level. The study demonstrates that it is relevant to use a performance indicator of losses per connection. On the other hand, it showed no link between the volume of losses and the average pressure, which is contrary to what is commonly admitted.

scholarly journals Analysis of Water Losses and Assessment of Initiatives Aimed at Their Reduction in Selected Water Supply Systems

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 1037 ◽  
Author(s):  
Ewa Ociepa ◽  
Maciej Mrowiec ◽  
Iwona Deska
Keyword(s):  
Water Supply ◽  
Water Loss ◽  
Distribution Systems ◽  
International Standards ◽  
Water Supply Systems ◽  
Water Losses ◽  
Supply Networks ◽  
Water Supply Networks ◽  
Loss Index ◽  
Water Meters

This paper presents the analysis and assessment of water losses in water distribution systems of three water supply companies operating water supply networks in the area of effect of underground mining. The analysis of water losses was conducted based on numerous indices allowing for obtaining objective information on the condition of the water supply system. The method of the analysis of percentage water loss index was extended by the methods of determination of losses according to the International Water Association. The results of the analysis lead to the conclusion that with regular actions, the companies have reduced water losses in recent years to a level considered to be good compared to national data and average compared to international standards. The value of the failure intensity index for all companies in 2011 was over 1.0 while currently it is about 0.5. The decrease in Non-Revenue Water basic loss index (NRWB) from more than 20% for all analysed companies in 2008 to a few percent in 2017 and the decrease in Infrastructure Leakage Index (ILI) for companies A and C to less than 2.0 are evidence of the good condition of the network. This is also confirmed by the unit water loss index per capita, with its value in 2017 being 9.1 dm3/(inhabitant day) for company A, 11 dm3/(inhabitant·day) for B and 7.4 dm3/(inhabitant·day) for C. The several years of analysis and evaluation of numerous indices of water loss presented in the paper reveals the effectiveness of the adopted strategies of reducing leakages in the distribution system. It should be emphasized that the analysed companies have been involved in comprehensive initiatives aimed at reducing water leakages, resulting in a substantial reduction in water losses. GIS monitoring systems and databases are particularly helpful in reducing water losses. The basis of the activities is monitoring of flow and pressure in water supply networks and active leakage control. Network zoning with simultaneous observation of minimum night-time flows allows for preliminary location of the failure. Equipping companies with special leakage detection devices such as geophones, stethophones or correlators enables quick detection of leakages. The next step is to replace water meters with more and more accurate ones and to implement radio reading of water meters. All analysed companies perform systematic replacement of old steel and cast iron pipes which cause a large number of leakages that are often difficult to identify, thus leading to water losses.

scholarly journals Automation with renewable energy to optimize the exploitation of water supply networks in Ninh Thuan province

2018 ◽  
Vol 193 ◽  
pp. 02001
Author(s):  
Anh Tuan Vo ◽  
Lien Huong Mai ◽  
Huynh Thuy Ngan Nguyen
Keyword(s):  
Renewable Energy ◽  
Water Supply ◽  
Water Loss ◽  
Pressure Control ◽  
Optimal Solutions ◽  
Hydraulic Power ◽  
Supply Networks ◽  
Power Generator ◽  
Water Supply Networks ◽  
Pressure Reducing Valve

The research that was conducted on the water supply network of Phan Rang city, Ninh Thuan province, is aimed at using renewable energy to optimize the management and reduce the water loss. The research has conducted DMA (District Metering Area) setup, construction and installation of flow meter and pressure reducing valve chamber for flow and pressure control with active pressure regulation, and the use of hydraulic power generator to generate power at the site. Research results provide management agencies, in particular, water supply companies, with optimal solutions in network management and energy saving, reducing the amount of water loss effectively, thereby increasing revenue and saving clean water - precious resources are gradually depleted.

Integrating Performance Indicator Into the Audit Process Safety Management System

2005 ◽  
Vol 5 (2) ◽  
pp. 161
Author(s):  
C. R. Che Hassan ◽  
M. J. Pitt ◽  
A. J. Wilday
Keyword(s):  
Performance Indicators ◽  
Management System ◽  
Feedback Loop ◽  
Safety Management ◽  
Performance Indicator ◽  
Process Safety ◽  
Audit Process ◽  
Safety Management System ◽  
Audit System ◽  
Similar Elements

The development of the audit method has included the identification of possible performance indicators at each level of the sociotechnical pyramid for a range of areas of work in which accidents have been shown to occur most frequently. The measurementof performance indicators is part of a feedback loop which causes safety improvements. Integration of performance indicators into the audit system has been tested at three operating chemical industries in Terengganu and Selangor in Malaysia. A summary of the weaknesses of the similar elements identified in the three audited plants is presented. Analysis on the approach used enables the identification of deficiencies in safety management aspects. Keywords: Accidents, audit, deficiencies, performance indicators, safety management, and sociotechnical pyramid.

scholarly journals Intelligent long-term performance analysis in power electronics systems

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Saeed Peyghami ◽  
Tomislav Dragicevic ◽  
Frede Blaabjerg
Keyword(s):  
Performance Indicator ◽  
Thermal Characteristics ◽  
Operating Conditions ◽  
System Level ◽  
Power Electronic ◽  
Reliability Modeling ◽  
Artificial Neural Network Ann ◽  
Long Term Performance ◽  
Term Performance

AbstractThis paper proposes a long-term performance indicator for power electronic converters based on their reliability. The converter reliability is represented by the proposed constant lifetime curves, which have been developed using Artificial Neural Network (ANN) under different operating conditions. Unlike the state-of-the-art theoretical reliability modeling approaches, which employ detailed electro-thermal characteristics and lifetime models of converter components, the proposed method provides a nonparametric surrogate model of the converter based on limited non-linear data from theoretical reliability analysis. The proposed approach can quickly predict the converter lifetime under given operating conditions without a further need for extended, time-consuming electro-thermal analysis. Moreover, the proposed lifetime curves can present the long-term performance of converters facilitating optimal system-level design for reliability, reliable operation and maintenance planning in power electronic systems. Numerical case studies evaluate the effectiveness of the proposed reliability modeling approach.

Key Performance Indicators Analysis for Quay Container Crane Performance Assessment (Case Study at Jakarta International Container Terminal)

2021 ◽  
Vol 2 (2) ◽  
pp. 115
Author(s):  
Mufti Imam Pekih ◽  
Adelina Sembiring ◽  
Sugeng Santoso
Keyword(s):  
Performance Indicators ◽  
Performance Indicator ◽  
Container Terminal ◽  
Management Tool ◽  
Container Port ◽  
Key Performance Indicator ◽  
Heavy Load ◽  
Container Loading ◽  
Container Crane ◽  
Loading And Unloading

<p><span lang="PT-BR">PT Jakarta International Container Terminal (JICT) is the largest container port in Indonesia. Currently, JICT capacity is 2.5 million TEUs (Twenty-foot Equivalent Units) per year, it continues to strive to improve international services and is supported by adequate container loading and unloading equipment. The requirement to establish common standards in different types of container port equipment and identify performance indicators to assess the performance of container handling equipment has increased. Although the Quay Container Crane (QCC) operating system may be different at each container terminal, there are similarities in its main movements, namely: Main Hoist, Trolley, Gantry, and Boom. By knowing the clock metric for each movement, it is possible to determine the Key Performance Indicator (KPI) that has been adopted and assess the performance of the Quay Container Crane (QCC). The results of the study identified that the value of MMBF (Mean Move Between Failures) decreased due to the accumulation of long-lasting heavy load operations, while the number of maintenance activities for machine parts and working hours continued to increase. Key Performance Indicator (KPI) as a management tool can guide QCC inspections and the results can provide useful insights for improving the performance of equipment and container loading and unloading operations in the future.</span></p>

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