scholarly journals Decision Support for the Design and Operation of Variable Speed Pumps in Water Supply Systems

Water ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 734 ◽  
Author(s):  
Dimitri Nowak ◽  
Helene Krieg ◽  
Michael Bortz ◽  
Christian Geil ◽  
Axel Knapp ◽  
...  
Keyword(s):  
Decision Support ◽  
Water Supply ◽  
Water Supply Systems ◽  
Variable Speed ◽  
Supply Systems

scholarly journals A real options approach to the design and architecture of water supply systems using innovative water technologies under uncertainty

2011 ◽  
Vol 14 (1) ◽  
pp. 13-29 ◽  
Author(s):  
Stephen X. Zhang ◽  
Vladan Babovic
Keyword(s):  
Decision Support ◽  
Water Resources ◽  
Water Supply ◽  
Real Options ◽  
Effective Means ◽  
Supply System ◽  
Water Supply System ◽  
Water Supply Systems ◽  
Real Options Approach ◽  
Supply Systems

Water supply has become a priority for developed and developing nations of the world. Conventional water resources alone cannot meet the growing demand for water in urban cities. Management of the problem is amplified by uncertainty associated with different development strategies. Singapore has limited conventional water resources and progressively architects its water supply system through acquiring and sustaining multiple (alternative) water resources through innovative technologies. The full rationale and merits of such a policy cannot be properly understood based on traditional project valuation methods alone. This paper provides decision support using a real options approach by evaluating innovative water technologies from multiple perspectives under uncertainty. This paper demonstrates that incorporating innovative water technologies into water supply systems can concurrently improve water supply from the financial, political and socioeconomic perspectives. The development of innovative water technologies provides flexibility to the water supply system, and is a fundamental and effective means of risk management. The evaluation of innovative water technologies is based on an integrated real options approach, which provides decision support for architecting water supply systems under uncertainty. The approach gives specific tangible values for the water technologies and complements the general prescriptive Integrated Water Resources Management (IWRM) framework.

scholarly journals THE PROJECT MANAGEMENT OF WATER SUPPLY COMPLEXES RECONSTRUCTION ON THE BASIS OF DECISION SUPPORT SYSTEMS

2014 ◽  
pp. 257-263
Author(s):  
Anatoliy J. Gaida ◽  
Tigran G. Grigorian ◽  
Yuriy N. Kharitonov ◽  
Volodymyr K. Koshkin
Keyword(s):  
Decision Support ◽  
Project Management ◽  
Water Supply ◽  
Structural Model ◽  
Water Supply Systems ◽  
Neural Network Classifier ◽  
Social Significance ◽  
Weighted Sum Method ◽  
System Reconstruction ◽  
Supply Systems

The problems of managing projects of water supply system reconstruction are considered. The characteristics of such systems and especially the processes of planning and implementation of water supply systems reconstruction projects were analyzed. The necessity of sharing the methods of projects value assessing according to their social significance and economic benefit expectations are identified. On the basis of the fulfilled research a structural model of automated decision support system in project management of water supply systems reconstruction is proposed. The model is based on the use of the weighted sum method and assessment the current states of projects by the means of a neural network classifier.

scholarly journals Method of evaluation of efficiency improvement potential for water supply systems with focus on variable speed centrifugal pumps

2012 ◽  
Vol 5 (1) ◽  
pp. 533-553
Author(s):  
D. Pilscikovs ◽  
E. Dzelzitis
Keyword(s):  
Water Supply ◽  
Electrical Energy ◽  
Pressure Control ◽  
Control Mode ◽  
Water Supply Systems ◽  
Public Water Supply ◽  
Efficiency Improvement ◽  
Variable Speed ◽  
Improvement Potential ◽  
Supply Systems

<p><strong>Abstract.</strong> The goal of this research is the derivation of the method for evaluation of efficiency improvement potential for public water supply systems with a focus on centrifugal network pumps. The efficiency of proportional pressure control usage has been analyzed for variable speed pumps. It has been done if proportional pressure control is used in comparison with constant pressure control mode. For this reason, energy calculation analyses have been realized for variable speed centrifugal pumps, and the theoretical tool of estimation of the efficiency improvement potential for public water supply systems has been derived. The conclusions are as follows: (1) it has been found that 1110 MWh of annually consumed electrical energy can be saved up, if the control mode of variable speed network pumps will be changed from constant pressure to proportional pressure control mode with the deviation of 20% from head value of duty point at zero flow; (2) about 13 MWh of annually consumed electrical energy can be saved up, if the proportional pressure control mode with the deviation of 15% will be changed to the deviation of 20%; (3) totally about 1123 MWh or 1.12 GWh (14% of the annually consumed electrical energy by variable speed network pumps) can be saved up in small public water supply systems in Latvia.</p>

Determination of Global Efficiencies of Variable Speed Pumps within Water Supply Systems

2018 ◽  
Vol 20 (1) ◽  
pp. 81-88
Author(s):  
Daniel Toma ◽  
Cristina-Mihaela Vîrlan ◽  
Nicolae Marcoie
Keyword(s):  
Water Supply ◽  
Frequency Converter ◽  
Asynchronous Motor ◽  
Water Supply Systems ◽  
Variable Speed ◽  
Frequency Converters ◽  
City Water ◽  
Variable Speed Motor ◽  
Supply Systems

Abstract The energy transformations involved in the operation of the pumping installations are carried out by pumping aggregates consisting of an electric motor and a pump. In order to provide a full adaptation to the users’ variable demands, variable speed motor driven pumps are used on networks (such motors being equipped with frequency converters). The paper presents a method for determining the global efficiency of a frequency converter-asynchronous motor-pump group. The method has been implemented at the Chiriţa Pumping Station, main facility within the Iasi City water supply system.

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