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Relevant bibliographies by topics / Water Mathematical optimization

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Academic literature on the topic 'Water Mathematical optimization'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Water Mathematical optimization"

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D’Ambrosio, Claudia, Andrea Lodi, Sven Wiese, and Cristiana Bragalli. "Mathematical programming techniques in water network optimization." European Journal of Operational Research 243, no. 3 (June 2015): 774–88. http://dx.doi.org/10.1016/j.ejor.2014.12.039.

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Cojanu, V., and E. Helerea. "Applying the mathematical optimization model in water distribution management." IOP Conference Series: Materials Science and Engineering 789 (June 6, 2020): 012011. http://dx.doi.org/10.1088/1757-899x/789/1/012011.

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Alabdulkader, A. M., A. I. Al-Amoud, and F. S. Awad. " Optimization of the cropping pattern in Saudi Arabia using a mathematical programming sector model." Agricultural Economics (Zemědělská ekonomika) 58, No. 2 (March 5, 2012): 56–60. http://dx.doi.org/10.17221/8/2011-agricecon.

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A mathematical sector model has been formulated to optimize the cropping pattern in Saudi Arabia aiming at maximizing the net annual return of the agricultural sector in Saudi Arabia and ensuring the efficient allocation of the scarce water resources and arable land among the competing crops. The results showed the potential for Saudi Arabia to optimize its cropping pattern and to generate an estimated net return equivalent to about 2.42 billion US$ per year. The optimized cropping pattern in Saudi Arabia has been coupled with about 53% saving in the water use and about 48% reduction in the arable land use compared to the base-year cropping pattern. Comparable weights was given to different crop groups by allocating about 48.4%, 35.4%, 13.1%, and 3.2% to grow cereals, fruits, forages, and vegetables, respectively. These findings were in line with the national strategy to rationalize the cultivation of water-intensive crops in favour of highly water-efficient crops.  

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Lee, Jui-Yuan, Cheng-Liang Chen, Tong-Lin Wen, Denny Kok Sum Ng, Dominic Chwan Yee Foo, and Tzu-Chi Wang. "Synthesis and design of chilled water networks using mathematical optimization." Applied Thermal Engineering 58, no. 1-2 (September 2013): 638–49. http://dx.doi.org/10.1016/j.applthermaleng.2013.04.024.

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Wang, Ke Yan, and Qi Sheng Wang. "Mathematical Model and Numerical Experiment of Photovoltaic Water Pumping System." Advanced Materials Research 772 (September 2013): 653–57. http://dx.doi.org/10.4028/www.scientific.net/amr.772.653.

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This paper presents the engineering analytical models of photovoltaic (PV) water pumping system from electronics theory, and some mathematical models of system components have been established. Studies have shown that the minimum unit water cost may not be reached only with the control strategy of maximum output power of the system. Therefore, system optimization is very necessary to reducing the capacity for every unit of pumped water, which is based on the design optimization theory and has shown its economics.

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Toma, Petrică Daniel. "Sizing and Simulation for Optimization of a Water Pumping Installation Using Fuzzy Logic." Ovidius University Annals of Constanta - Series Civil Engineering 22, no. 1 (December 1, 2020): 85–93. http://dx.doi.org/10.2478/ouacsce-2020-0010.

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Abstract In this article we present the way how to create a program in the Scilab-Xcos environment with which it can be dimensioned, mathematically modeled and simulated a water pumping installation. The mathematical equations implemented in the program with which the dimensioning and simulation are done are presented. Fuzzy logic was used to generate the pump characteristics.

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Zagorska, V., and U. Iljins. "Optimization Of Parameters Of Heating Elements For Floor Panel Of Piglets Resting Places." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (August 5, 2015): 92. http://dx.doi.org/10.17770/etr2011vol2.1010.

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The article deals with problem solving of mathematical physics using the method of separation of variables optimizing heating element – optimizing water tube parameters (tube material, radius, insulation thickness, choosing appropriate surrounding environment). For ensuring piglets comfort, concrete floor panels heated by electric current or hot water are used. If an electro-heated cable in the panels body is placed, than amount of heat conducted from the cable is the same along all the length of the cable. If hot water circulating through tube is used, than amount of heat energy taken off the heater decreases along its length. The aim of the research is to create the mathematical model of a water tube, were water temperature is gradually decreasing. This model is needed to make precise calculations of the heating panel for piglets, to ensure equal temperature distribution over the upper surface of the panel, taking into account mathematically calculated temperature decrease of the heat source.

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Hu, Chang, and Dang Sheng Li. "Research of Crop Water-Saving Irrigation Optimization." Applied Mechanics and Materials 737 (March 2015): 771–75. http://dx.doi.org/10.4028/www.scientific.net/amm.737.771.

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According to Luoyang rainfall data from 1951 to 2011, this paper discussed the distribution characteristics of rainfall in the whole year. It analyzed summer maize growth period with the coupling of water consumption. It set up the estimation model of summer maize water consumption, the mathematical model of yield and water relationship, and then analyzed its mutual relations. The experimental results showed that the water requirement and rainfall distribution would fit well during summer maize growth. But summer maize growth stage should be irrigated suitably in the dry and median water year.

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Lenhard, Richard, Katarína Kaduchová, and Jozef Jandačka. "Numerical Simulation of Indirectly Heated Hot Water Heater." Advanced Materials Research 875-877 (February 2014): 1693–97. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1693.

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This paper describes a mathematical model of heating hot water for indirectly heated hot water heater. Using the established mathematical model was carried out simulation of the device to change its geometrical parameters. Based on the results of simulations was carried out optimization of indirectly heated hot water heater for hot water. Subsequently been made CFD simulations of the device, and those were compared with a mathematical model to verify the accuracy of the proposed mathematical model of heating hot water for indirectly heated hot water heater. Computational methods based on finite volume methods (CFD method) have proved very useful in optimizing indirectly heated hot water heater.

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Cioc, D., and A. Anton. "Real-time optimization simulation software modules for water networks." Water Supply 3, no. 1-2 (March 1, 2003): 279–86. http://dx.doi.org/10.2166/ws.2003.0115.

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Several mathematical models and commercial computer codes are available to assess the behaviour of a hydraulic network both at peak demands and in 24 hour operation. Could a new model add some value to the prestigious existing ones? Are we really at the end of the research path in this field? These questions are to be answered in the present paper. A new concept of optimization is presented for water distribution modelling: a concept based on life-cycle cost analysis. Introducing a minimum number of parameters, technical and also economic, the authors were able to elaborate a mathematical model for optimization. The corresponding computer code’s capabilities are related both to the design of brand new networks and to the rehabilitation of old ones. The speed of the code allows, among others, a real-time optimization simulation for an existing network, making it a valuable operational tool. Finally the code has been tested on several networks and has been validated with very good results, being a simple tool that is easy to handle and capable of exchanging input and output data with practically any other similar software or graphic tool.

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Dissertations / Theses on the topic "Water Mathematical optimization"

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Greene, James J. "Global optimization of water distribution systems." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10062009-020212/.

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Battermann, Astrid. "Mathematical optimization methods for the remediation of ground water contaminations." [S.l.] : [s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=963762184.

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Rogalski, Richard Byron. "Mathematical and artificial neural network models for simulation and optimization of chlorine residuals in water distribution systems." access full-text online access from Digital Dissertation Consortium, 2002. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?NQ77034.

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Rogers, Scott W. "Multiobjective optimization of contaminant sensor locations in drinking water distribution systems using nodal importance concepts." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29607.

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Thesis (Ph.D)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Aral, Mustafa; Committee Member: Guan, Jiabao; Committee Member: Jang, Wonyong; Committee Member: Kim, Seong-Hee; Committee Member: Uzer, Turgay. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Abu, Rumman Malek. "Conjunctive Management of Surface Water and Groundwater Resources." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6917.

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Surface water and groundwater systems consist of interconnected reservoirs, rivers, and confined and unconfined aquifers. The integrated management of such resources faces several challenges: High dimensionality refers to the requirement of the large number of variables that need to be considered in the description of surface water and groundwater systems. As the number of these variables increases, the computational requirements quickly saturate the capabilities of the existing management methods. Uncertainty relates to the imprecise nature of many system inputs and parameters, including reservoir and tributary inflows, precipitation, evaporation, aquifer parameters (e.g., hydraulic conductivity and storage coefficient), and various boundary and initial conditions. Uncertainty complicates very significantly the development and application of efficient management models. Nonlinearity is intrinsic to some physical processes and also enters through various facility and operational constraints on reservoir storages, releases, and aquifer drawdown and pumping. Nonlinearities compound the previous difficulties. Multiple objectives pertain to the process of optimizing the use of the integrated surface and groundwater resources to meet various water demands, generate sufficient energy, maintain adequate instream flows, and protect the environment and the ecosystems. Multi-objective decision models and processes continue to challenge professional practice. This research draws on several disciplines including groundwater flow modeling, hydrology and water resources systems, uncertainty analysis, estimation theory, stochastic optimization of dynamical systems, and policy assessment. A summary of the research contributions made in this work follows: 1.High dimensionality issues related to groundwater aquifers system have been mitigated by the use of transfer functions and their representation by state space approximations. 2.Aquifer response under uncertainty of inputs and aquifer parameters is addressed by a new statistical procedure that is applicable to regions of relatively few measurements and incorporates management reliability considerations. 3.The conjunctive management problem is formulated in a generally applicable way, taking into consideration all relevant uncertainties and system objectives. This problem is solved via an efficient stochastic optimization method that overcomes dimensionality limitations. 4.The methods developed in this Thesis are applied to the Jordanian water resources system, demonstrating their value for operational planning and management.

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Mann, James Gainey. "Process Integration: Unifying Concepts, Industrial Applications and Software Implementation." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/29336.

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This dissertation is a complete unifying approach to the fundamentals, industrial applications and software implementation of an important branch of process-engineering principles and practice, called process integration. The latter refers to the system-oriented, thermodynamically-based and integrated approaches to the analysis, synthesis and retrofit of process plants, focusing on integrating the use of materials and energy, and minimizing the generation of emissions and wastes. This work extends process integration to include applications for industrial water reuse and wastewater minimization and presents previous developments in a unified manner. The basic ideas of process integration are: (1) to consider first the big picture by looking at the entire manufacturing process as an integrated system; (2) to apply process-engineering principles to key process steps to establish a priori targets for the use of materials and energy, and for the generation of emissions and wastes; and (3) to finalize the details of the process design and retrofit later to support the integrated view, particularly in meeting the established targets. Pinch technology is a set of primarily graphical tools for analyzing a process plant's potential for energy conservation, emission reduction and waste minimization. Here, we identify targets for the minimum consumption of heating and cooling utilities, mass-separating agents, freshwater consumption, wastewater generation and effluent treatment and propose economical grassroots designs and retrofit projects to meet these goals. An emerging alternative approach to pinch technology, especially when analyzing complex water-using operations and effluent-treatment systems, is mathematical optimization. We solve nonlinear programming problems for simple water-using operations through readily available commercial software. However, more complex, nonconvex problems require sophisticated reformulation techniques to guarantee optimality and are the subject of continuing academic and commercial development. This work develops the principles and practice of an environmentally significant breakthrough of process integration, called water-pinch technology. The new technology enables the practicing engineers to maximize water reuse, reduce wastewater generation, and minimize effluent treatment through pinch technology and mathematical optimization. It applies the technology in an industrial water-reuse demonstration project in a petrochemical complex in Taiwan, increasing the average water reuse (and thus reducing the wastewater treatment) in the five manufacturing facilities from 18.6% to 37%. This dissertation presents complete conceptual and software developments to unify the known branches of process integration, such as heat and mass integration, and wastewater minimization, and explores new frontiers of applications to greatly simplify the tools of process integration for practicing engineers.
Ph. D.

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Martins, Karlos Roberto da Silva Braga 1981. "Simulação e otimização computacional de diferentes configurações de sistemas de refrigeração por absorção água-amônia tipo GAX : Computational simulation and optimization of different arragements of absorption cooling systems water-ammonia type GAX." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265953.

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Orientador: José Ricardo Figueiredo
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
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Resumo: Neste trabalho foi adaptado um programa computacional para o projeto e simulação numérica de diferentes configurações de ciclos de refrigeração por absorção utilizando a mistura água ¿ amônia como fluido de trabalho, visando aplicações em condicionamento de ar para setores residencial e comercial. Foram estudados os ciclos de simples efeito e duas configurações de modelos com Troca de Calor Gerador-Absorvedor (GAX ¿ Generator-Absorber heat eXchange), uma com absorvedor de dois estágios e gerador de dois estágios e outra com absorvedor de três estágios e gerador de dois. Foram utilizadas equações de conservação da massa total da matéria, do número de moles de amônia e de energia para cada componente relevante da máquina, relações de estado termodinâmico para cada ponto do sistema, bem como, equações de transferência de calor em termos de parâmetro globais, para relacionar a transferência de calor às diferenças efetivas de temperatura, empregando os métodos da Diferença de Temperaturas Média Logarítmica e da Efetividade. As relações de estado termodinâmico da mistura água-amônia são derivadas analiticamente de duas equações representando a energia livre de Gibbs em termos de pressão, temperatura e concentração para as fases de líquido e de vapor. O sistema resultante de equações não lineares foi resolvido pelo método de Substituição-Newton-Raphson. Os resultados de desempenho, de temperaturas e de transferência de calor nos equipamentos que compõem o ciclo foram obtidos a partir da variação de parâmetros operacionais tais como, temperatura do ambiente a ser resfriado, temperatura do ar externo e temperatura do fluido quente na entrada do gerador. Após isso, foi realizado um estudo de otimização do coeficiente de desempenho e efeito frigorífico do ciclo GAX a partir da variação dos parâmetros globais dos trocadores
Abstract: In this work a computer program was adapted for design and numerical simulation of different configurations of absorption refrigeration cycles using the mixture water - ammonia as the working fluid, aiming at applications in air conditioning for residential and commercial sectors. Cycles of single effect, Generator-Absorber Heat eXchange (GAX ¿ Generator-Absorber heat eXchange) with two-stages absorber and two-stages generator and the other with three-stage absorber and two-stages generator were studied. Mass conservation equations of mass and energy of ammonia for each relevant component ratios thermodynamic state for each point in the system were used, as well as heat transfer equations in terms of global heat transfer parameter, relating to heat transfer to the actual temperature difference, using the methods of the logarithmic average temperature difference and effectiveness. The relations of thermodynamic state of the mixture water - ammonia are derived analytically for two equations for the Gibbs free energy in terms of pressure, temperature and concentration for phases of liquid and vapor. The resulting system of nonlinear equations was solved by the substitution method-Newton-Raphson. The results of performance, temperature and heat transfer equipment comprising in the cycle were obtained from the variation of operating parameters such as temperature of the environment to be cooled, the external air temperature and the hot fluid inlet temperature generator. After that, an optimization study of the coefficient of performance and fridge effect was performed for GAX cycle from the variation of the global parameters of the exchangers
Doutorado
Termica e Fluidos
Doutor em Engenharia Mecânica

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Kim, Doo-Il. "Development and application of integrated ozone contactor design and optimization tools." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-05182007-120642/.

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Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2008.
Jae-Hong Kim, Committee Chair ; Philip J.W. Roberts, Committee Member ; E. Michael Perdue, Committee Member ; Sotira Yiacoumi, Committee Member ; Thorsten Stoesser, Committee Member.

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Pavelka, David. "Optimalizace vodovodní sítě města Počátky." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409705.

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This diploma thesis focuses on the optimization of water supply system in the town of Počátky. It describes the process of creating a mathematical model needed for the hydraulic analysis, which was used to assess the water supply system Počátky. This thesis task is to apprise reader, with a basic distribution in the drinking water supply, how to proceed in collecting data on hydraulic analysis requirements and using tools and means used in hydraulic analysis. Conclusions are processed variants for possible optimization of water supply system Počátky.

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HIPOLITO, FABIO C. "Avaliação das metodologias de análise de sistemas de tubulações de vapor sujeitas a carregamentos do tipo Steam Hammer." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26938.

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Submitted by Marco Antonio Oliveira da Silva (maosilva@ipen.br) on 2016-12-21T18:18:35Z No. of bitstreams: 0
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Carregamentos transientes termo hidráulicos do tipo Steam Hammer são eventos comuns em sistemas de tubulações de vapor com grandes potenciais de catástrofes em plantas de geração de energia. Uma vez iniciado o evento, ondas de pressões são geradas com amplitudes, geralmente, de grande magnitude ocasionando altas pressões no sistema, ruídos, deformações, fadiga, com possibilidade de danos materiais e econômicos e em casos extremos fatalidades. Os procedimentos da indústria para análise deste tipo de sistema consistem realização de análises estáticas equivalentes ou análise de espectro de resposta com carregamentos caracterizados por meio de métodos analíticos baseados em hipóteses simplificadoras do fluido e fluxo. Neste trabalho é proposta a analise de sistema de tubulações por meio do método de integração numérica com superposição modal e carregamento caracterizado por método numérico com base no método das características. Comparações foram efetuadas entre os resultados obtidos pela metodologia proposta e os procedimentos da indústria, demonstrando que, dado ao alto grau de conservadorismo, os procedimentos da indústria acarretam em superdimensionamento de estruturas e tubulações ocasionando custos adicionais de projeto, sendo a otimização do projeto obtida aplicando-se a metodologia proposta no trabalho.
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

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Books on the topic "Water Mathematical optimization"

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Martin, Alexander, Kathrin Klamroth, Jens Lang, Günter Leugering, Antonio Morsi, Martin Oberlack, Manfred Ostrowski, and Roland Rosen, eds. Mathematical Optimization of Water Networks. Basel: Springer Basel, 2012. http://dx.doi.org/10.1007/978-3-0348-0436-3.

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Katsifarakis, K. L. Hydrology, hydraulics and water resources management: A heuristic optimization approach. Southampton: WIT Press, 2012.

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Barlow, Paul M. Use of simulation-optimization modeling to assess regional ground-water systems. [Reston, Va: U.S. Dept.of the Interior, U.S. Geological Survey, 2005.

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Barlow, Paul M. Use of simulation-optimization modeling to assess regional ground-water systems. [Reston, Va: U.S. Dept.of the Interior, U.S. Geological Survey, 2005.

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Barlow, Paul M. Use of simulation-optimization modeling to assess regional ground-water systems. [Reston, Va: U.S. Dept.of the Interior, U.S. Geological Survey, 2005.

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Barlow, Paul M. Use of simulation-optimization modeling to assess regional ground-water systems. [Reston, Va: U.S. Dept.of the Interior, U.S. Geological Survey, 2005.

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Barlow, Paul M. Use of simulation-optimization modeling to assess regional ground-water systems. [Reston, Va: U.S. Dept.of the Interior, U.S. Geological Survey, 2005.

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Barlow, Paul M. Use of simulation-optimization modeling to assess regional ground-water systems. [Reston, Va: U.S. Dept.of the Interior, U.S. Geological Survey, 2005.

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Bielski, Andrzej. Zastosowanie metod optymalizacyjnych w projektowaniu stref ochronnych ujęć wód powierzcniowych. Kraków: Politechnika Krakowska, 1997.

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Danskin, Wesley R. Ground-water-flow modeling and optimization techniques applied to high-ground-water problems in San Bernardino, California. Sacramento, Calif: U.S. Geological Survey, 1989.

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Book chapters on the topic "Water Mathematical optimization"

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Bragalli, Cristiana, Claudia D’Ambrosio, Jon Lee, Andrea Lodi, and Paolo Toth. "Optimizing the Design of Water Distribution Networks Using Mathematical Optimization." In International Series in Operations Research & Management Science, 183–98. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-1007-6_9.

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Rathke, P., R. Straubel, A. Wittmüss, and A. Gnauck. "Multi-Objective Optimization in River Water Quality Management by Means of the DSS REH." In Lecture Notes in Economics and Mathematical Systems, 271–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-22160-0_34.

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Müller, Tim M., Andreas Schmitt, Philipp Leise, Tobias Meck, Lena C. Altherr, Peter F. Pelz, and Marc E. Pfetsch. "Validation of an Optimized Resilient Water Supply System." In Lecture Notes in Mechanical Engineering, 70–80. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77256-7_7.

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AbstractComponent failures within water supply systems can lead to significant performance losses. One way to address these losses is the explicit anticipation of failures within the design process. We consider a water supply system for high-rise buildings, where pump failures are the most likely failure scenarios. We explicitly consider these failures within an early design stage which leads to a more resilient system, i.e., a system which is able to operate under a predefined number of arbitrary pump failures. We use a mathematical optimization approach to compute such a resilient design. This is based on a multi-stage model for topology optimization, which can be described by a system of nonlinear inequalities and integrality constraints. Such a model has to be both computationally tractable and to represent the real-world system accurately. We therefore validate the algorithmic solutions using experiments on a scaled test rig for high-rise buildings. The test rig allows for an arbitrary connection of pumps to reproduce scaled versions of booster station designs for high-rise buildings. We experimentally verify the applicability of the presented optimization model and that the proposed resilience properties are also fulfilled in real systems.

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Singh, Maneet, and Sanjay Saini. "Optimization of Complex Mathematical Functions Using a Novel Implementation of Intelligent Water Drops Algorithm." In Advances in Intelligent Systems and Computing, 145–49. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-1602-5_16.

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Ben-Tal, A., G. Eiger, J. Outrata, and J. Zowe. "A Nondifferentiable Approach to Decomposable Optimization Problems with an Application to the Design of Water Distribution Networks." In Lecture Notes in Economics and Mathematical Systems, 197–216. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-51682-5_13.

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Morsi, Antonio, Björn Geißler, and Alexander Martin. "Mixed Integer Optimization of Water Supply Networks." In International Series of Numerical Mathematics, 35–54. Basel: Springer Basel, 2012. http://dx.doi.org/10.1007/978-3-0348-0436-3_3.

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Russo, Giovanni, Vincenzo Capasso, Giuseppe Nicosia, and Vittorio Romano. "MS 32 MINISYMPOSIUM: SIMULATION AND OPTIMIZATION OF WATER AND GAS NETWORKS." In Mathematics in Industry, 779–81. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-23413-7_108.

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Steinebach, Gerd, Tim Jax, and Lisa Wagner. "Minisymposium: Simulation and Optimization of Water and Gas Networks." In Progress in Industrial Mathematics at ECMI 2016, 429–30. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63082-3_67.

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Auzinger, D., M. Bergmayr, W. Kapfer, B. Schürz, and Hj Wacker. "Optimization of a Solar Domestic Hot-Water System." In Proceedings of the Fourth European Conference on Mathematics in Industry, 193–96. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-009-0703-4_18.

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Izquierdo, J., I. Montalvo, R. Pérez, M. M. Tung, and M. Tavera. "Distributed Particle Swarm Intelligence for Optimization in the Water Industry." In Progress in Industrial Mathematics at ECMI 2008, 893–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12110-4_143.

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Conference papers on the topic "Water Mathematical optimization"

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Kumaravel, R., J. S. Sudarsan, Vemu Kumari Jyothirmai, and Sija Arun. "Water quality index estimation using fuzzy optimization technique." In 1ST INTERNATIONAL CONFERENCE ON MATHEMATICAL TECHNIQUES AND APPLICATIONS: ICMTA2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0025405.

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Lawrence, Cecil, and Wieslaw M. Szydlowski. "Surface Topology Optimization of Water Tanks Using Genetic Algorithm." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43925.

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The purpose of this work is to explore the possibility of utilizing Genetic Algorithm in optimizing the surface topology of water tanks. The surface characteristics of a corrugated tank are tested on a small element on its circumference. A mathematical equation to represent most practical corrugated surfaces is developed using the Coons surface with trigonometric series curves. The parameters of this mathematical equation are used to describe the chromosome for different surfaces. A multi-objective fitness function incorporating the performance of a surface and the manufacturing cost associated with that surface is developed, which uses finite element analysis to determine the performance of each surface. Considerable better corrugations, compared to those normally used, were found.

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Djebedjian, Berge, Ahmed Herrick, and Magdy Abou Rayan. "Modeling and Optimization of Potable Water Network." In 2000 3rd International Pipeline Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/ipc2000-256.

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A potable water network hydraulic analysis is presented in this paper. A mathematical model was developed, the model treats looped network. A computer program is developed in order to facilitate water distribution system design, which satisfies all constraints including pipe diameter and nodal pressure. An optimization technique is developed in order to evaluate the optimum network configuration and cost, the parameters are pipe diameter, flow rate, corresponding pressure and hydraulic losses. A non-linear technique was adopted in the solution. The model uses the sequential unconstrained minimization technique (SUMT) of Fiacco and McCormick (1964) to solve the optimal design of network. The adopted optimization technique decreases the required number of design iterations which for example may reach 1.48 billion iterations for a network with 8 pipes and a set of 14 available commercial pipes. The initially assumed pipe diameters are successively adjusted to suit the existing standard commercial pipe diameters. The technique was applied on a simple case study of gravity-fed network. The objective of the present investigation is to present a practical tool to help in the optimization of water distribution system, design and operation.

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Han, Mingxing, Yinshui Liu, Huaijiang Tan, and Defa Wu. "Mathematical Modelling and Multi-Objective Optimization Design of a Large Flow Water Hydraulic Proportional Cartridge Valve." In ASME/BATH 2017 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fpmc2017-4243.

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The large flow water hydraulic proportional cartridge valve is one of the most important components and also the technical difficulties in the high performance large-tonnage engineering machinery, such as the die casting machine. The structure and principle of the large flow water hydraulic proportional cartridge valve are presented in this paper. The valve utilizes a two-stage structure with the high performance proportional valves as the pilot stage and the cartridge poppet valve as the main stage to overcome the fundamental tradeoff between the flow capacity and dynamic characteristics. A detailed and precise nonlinear mathematical model of the cartridge valve considering both structural parameters and nonlinear factors (compressibility of water, leakage, friction, flow force, etc.) is established. And then MATLAB/Simulink software is employed to build the simulation model and the dynamic simulation is carried out. Compared with the simulation results of the valve with different design parameters, the static and dynamic characteristics of the proportional cartridge throttle valve have been analyzed. The impacts of the parameters on the performance of step-response have been studied. Finally, based on multi-objective optimization method, the optimal parameters of the cartridge valve have been obtained. The simulation results show that the performances have been significantly improved.

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Satyanarayan R.S. Dev, Ali Demirci, Robert E Graves, and Virendra M Puri. "MATHEMATICAL MODELING AND OPTIMIZATION OF CLEAN-IN-PLACE BY USING ELECTROLYZED OXIDIZING WATER FOR A PILOT-SCALE MILKING SYSTEM." In 2013 Kansas City, Missouri, July 21 - July 24, 2013. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2013. http://dx.doi.org/10.13031/aim.20131592861.

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Alexandrescu, Aurora C., Simona Adina O. Alexandrescu, and Constantin Adrian O. Alexandrescu. "Contributions Concerning the Power Optimization of the Pumping Stations." In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55007.

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Profitability of water distribution activity depends largely on the relationships between operational capability and service costs, related to supplier’s performance, volume of distributed water and effective operating costs. The main variables that influence the total selling price are required investment value, specific consumption of electrical energy for pumping power, unit price of the electrical energy and total volume of monthly consumed water billed. The selection of rehabilitation and modernization measures must rely on market studies results that appropriately establish the quantities of water that may be distributed and billed. Present and future water requirements will be determined based on the analysis of actual operation data and on estimation of future trends in water consumption on national and international levels. The optimization calculation will use two target functions: total maximum efficiency and total electric power consumption required for transport of each cubic meter of supplied water, and cubic meter of sewage water, respectively. The mathematical methods may be improved by taking into account all active consumers in the network with simultaneous water requirements, at each moment of the day. Using several original mathematical algorithms, authors developed a computer program that calculates the functional parameters of the ensemble pumping station – hydrophore – pipe distribution network, as well as the available consumer parameters. This may be accomplished at each moment in time, depending on the number of active consumers simultaneously connected to the supply network, in the hypothesis of a minimum price of cubic meter of pumped water. This paper proposes a solution of the problem of reducing production costs for supplied domestic water, which directly affects the reduction of the electric power consumption.

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Vargas, J. V. C., J. C. Ordonez, R. Hovsapian, and F. G. Dias. "Modeling, Simulation and Optimization of a Solar System for Water Heating and Absorption Cooling." In ASME 2008 2nd International Conference on Energy Sustainability collocated with the Heat Transfer, Fluids Engineering, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/es2008-54339.

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A cogeneration system consisting of a solar concentrator, a cavity-type receiver, a gas burner, a thermal storage reservoir, a hot water heat exchanger, and an absorption refrigerator is devised to simultaneously produce heat (hot water) and cooling (cold chamber). A simplified mathematical model, which combines fundamental and empirical correlations, and principles of classical thermodynamics, mass and heat transfer, is developed. The proposed model is then utilized to simulate numerically the system transient and steady state response under different operating and design conditions. A system global optimization for maximum performance in the search for minimum pull-down and pull-up times is performed with low computational time. Appropriate dimensionless groups are identified and the results presented in normalized charts for general application. The minimum pull-down and pull-up times, found with respect to the optimized operating parameters are sharp and, therefore important to be considered in actual design. As a result, the model is expected to be a useful tool for simulation, design, and optimization of solar energy systems of the type presented in this work.

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Hou, Zhijian, Ming Qu, and Zhirui Wang. "Flow Resistance Coefficient Identification of Chilled Water System Based on Multi-Objective Optimization and Experiment Validation." In ASME 2014 8th International Conference on Energy Sustainability collocated with the ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/es2014-6765.

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Hydraulic resistance coefficient (HRC) is a fundamental parameter that characterizes the hydraulic state of a water pipeline and significantly determines the efficiency of the water-transport process. To estimate HRC and diagnose hydraulic process fault in building air conditioning system, a novel method called multi-objective optimization (MBO) strategy was developed in the research effort. MBO is concerned with mathematical optimization problems involving more than one objective function to be optimized simultaneously. In this paper, first, the basic principle of the approach is presented. Then several experiments are conducted to identify the HRC in a real air conditioning system. And the water flow rate of each air handling terminal unit is estimated by the flow rate of primary pipe and identified HRC. The experiment results show that the model can accurately estimate HRCs. The HRCs of each pipe and terminal unit were obtained by the flow rate and the pressure difference of primary pipe without requiring geometric specifications, which is very convenient in real engineering application.

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Ricks, Sean T., John R. Lewandowski, Emmanuel G. Lim, Dawn M. Wendell, and Amos G. Winter. "Development of a Design Tool for Flow Rate Optimization in the Tata Swach Water Filter." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35320.

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When developing a first-generation product, an iterative approach often yields the shortest time-to-market. In order to optimize its performance, however, a fundamental understanding of the theory governing its operation becomes necessary. This paper details the optimization of the Tata Swach, a consumer water purifier produced for India. The primary objective of the work was to increase flow rate while considering other factors such as cost, manufacturability, and efficacy. A mathematical model of the flow characteristics through the filter was developed. Based on this model, a design tool was created to allow designers to predict flow behavior without prototyping, significantly reducing the necessity of iteration. Sensitivity analysis was used to identify simple ways to increase flow rate as well as potential weak points in the design. Finally, it was demonstrated that maximum flow rate can be increased by 50% by increasing the diameter of a flow-restricting feature while simultaneously increasing the length of the active purification zone. This can be accomplished without significantly affecting cost, manufacturability, and efficacy.

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Mahboubi, D., and M. H. Saidi. "Optimal Behavior of Hot Water Heating Coils at Steady Conditions." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68455.

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Hot water heating coils are key components in air conditioning systems undergo heat transfer. The most widely used exchangers (coils) take the form of fin and tube configuration in association with the application of air conditioning systems. In this research, thermodynamic modeling and mathematical optimization of hot water heating coils at steady conditions, approaching minimum energy consumption are achieved. The modeling procedure for heating coils is done based on the log mean temperature difference (LMTD) method. The objective function for optimization is pressure drop of air crossing coil per heating load of the system. This unction comprises all thermal and geometrical parameters of the coils such as coil surface area, number of rows, fin spacing and air side pressure drop of the coil. The objective function is minimized using Lagrange multipliers method. The optimization results are composed of minimum pressure drop, optimum surface area, optimum number of rows and fin spacing. The effects of varying the heating load, fin efficiency and the surface area of the coils on optimum behavior of them are investigated as well.

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