The Experts below are selected from a list of 82482 Experts worldwide ranked by ideXlab platform
Miguel J Bagajewicz - One of the best experts on this subject based on the ideXlab platform.
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Financial Risk Management in the Design of Water Utilization Systems in Process Plants
Industrial & Engineering Chemistry Research, 2003Co-Authors: Anantha P. R. Koppol, Miguel J BagajewiczAbstract:This paper discusses techniques to design Water Utilization systems in process plants when the parameters, especially the loads of the contaminants, are uncertain. Financial risk management in such designs is discussed in detail. It is also managed in a noniterative fashion using a one-step procedure that incorporates financial risk management as a constraint in the design procedure.
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energy efficient Water Utilization systems in process plants
Computers & Chemical Engineering, 2002Co-Authors: Miguel J Bagajewicz, Hernan Rodera, Mariano J SavelskiAbstract:This paper introduces a new approach for the design of Water Utilization networks featuring minimum freshWater usage and minimum utility consumption in process plants. The procedure is confined to treat the single pollutant case, and it is based on a linear programming formulation that relies on necessary conditions of optimality and a heat transshipment model. An LP model is first solved to obtain minimum Water usage and minimum heating utility target values. Once the energy and Water targets have been identified, an MILP model is generated. This model, which accounts for non-isothermal mixing, provides the information needed to construct the Water reuse structure as well as the corresponding heat exchanger network.
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on the use of linear models for the design of Water Utilization systems in process plants with a single contaminant
Chemical Engineering Research & Design, 2001Co-Authors: Miguel J Bagajewicz, Mariano J SavelskiAbstract:This paper addresses the optimum design of Water Utilization systems when a single contaminant is present. The application of the necessary conditions of optimality allows an LP or MILP formulation depending on the objective function of choice. Several examples are presented to illustrate the proposed methodology and to point out that several alternative solutions are available.
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algorithmic procedure to design Water Utilization systems featuring a single contaminant in process plants
Chemical Engineering Science, 2001Co-Authors: Mariano J Savelski, Miguel J BagajewiczAbstract:This paper introduces a non-iterative algorithmic procedure to design Water Utilization networks in refineries and process plants. The procedure is based on necessary and sufficient conditions of optimality that allow the construction of a global optimal solution without the need or a targeting procedure. In addition, the steps of this procedure are such that it can be implemented by hand and have no limitations on the problem size.
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a robust method to obtain optimal and sub optimal design and retrofit solutions of Water Utilization systems with multiple contaminants in process plants
Computers & Chemical Engineering, 2000Co-Authors: Miguel J Bagajewicz, Margiori Rivas, Mariano J SavelskiAbstract:In this paper, a simple new approach for the grassroots and retrofit design of Water Utilization systems with multiple contaminants is presented. This approach uses a combination of mathematical programming and necessary conditions of optimality to automatically generate the optimal solution featuring minimum capital and operating costs. This paper presents the only existing method to solve this problem that can guarantee global optimality.
Mariano J Savelski - One of the best experts on this subject based on the ideXlab platform.
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energy efficient Water Utilization systems in process plants
Computers & Chemical Engineering, 2002Co-Authors: Miguel J Bagajewicz, Hernan Rodera, Mariano J SavelskiAbstract:This paper introduces a new approach for the design of Water Utilization networks featuring minimum freshWater usage and minimum utility consumption in process plants. The procedure is confined to treat the single pollutant case, and it is based on a linear programming formulation that relies on necessary conditions of optimality and a heat transshipment model. An LP model is first solved to obtain minimum Water usage and minimum heating utility target values. Once the energy and Water targets have been identified, an MILP model is generated. This model, which accounts for non-isothermal mixing, provides the information needed to construct the Water reuse structure as well as the corresponding heat exchanger network.
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on the use of linear models for the design of Water Utilization systems in process plants with a single contaminant
Chemical Engineering Research & Design, 2001Co-Authors: Miguel J Bagajewicz, Mariano J SavelskiAbstract:This paper addresses the optimum design of Water Utilization systems when a single contaminant is present. The application of the necessary conditions of optimality allows an LP or MILP formulation depending on the objective function of choice. Several examples are presented to illustrate the proposed methodology and to point out that several alternative solutions are available.
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algorithmic procedure to design Water Utilization systems featuring a single contaminant in process plants
Chemical Engineering Science, 2001Co-Authors: Mariano J Savelski, Miguel J BagajewiczAbstract:This paper introduces a non-iterative algorithmic procedure to design Water Utilization networks in refineries and process plants. The procedure is based on necessary and sufficient conditions of optimality that allow the construction of a global optimal solution without the need or a targeting procedure. In addition, the steps of this procedure are such that it can be implemented by hand and have no limitations on the problem size.
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a robust method to obtain optimal and sub optimal design and retrofit solutions of Water Utilization systems with multiple contaminants in process plants
Computers & Chemical Engineering, 2000Co-Authors: Miguel J Bagajewicz, Margiori Rivas, Mariano J SavelskiAbstract:In this paper, a simple new approach for the grassroots and retrofit design of Water Utilization systems with multiple contaminants is presented. This approach uses a combination of mathematical programming and necessary conditions of optimality to automatically generate the optimal solution featuring minimum capital and operating costs. This paper presents the only existing method to solve this problem that can guarantee global optimality.
Xuhui Ding - One of the best experts on this subject based on the ideXlab platform.
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Study on Urbanization Level, Urban Primacy and Industrial Water Utilization Efficiency in the Yangtze River Economic Belt
Sustainability, 2019Co-Authors: Xuhui Ding, Hongwen JiaAbstract:Considering the undesirable output, this paper adopted the data envelopment analysis (DEA) model with the slack variable and super efficiency improvement, to measure industrial Water Utilization efficiency in the Yangtze River Economic Belt. The paper also creatively introduces urbanization level and urban primacy into driver factors’ estimation by stochastic and fixed Tobit models, exploring how urbanization characteristics affected the Water Utilization in regional industrial production. The results showed that industrial Water efficiency has maintained an upward trend during the whole period, while most central and western provinces have shown a U-shaped trend of decreasing first and then rising. However, the industrial Water Utilization efficiency of central regions is the lowest, and the eastern regions are the highest, catching up with western regions. Utilization efficiency shows an overall convergence during the research period from 2005 to 2017. Regarding the factors’ estimation, both population urbanization and land urbanization negatively affected industrial Water Utilization efficiency, particularly blind expansion and disorderly development. The urban primacy meant the unbalance of urbanization, which would lead to urban diseases and pollution transfer, while the effects of urban primacy depended on the urbanization level. However, the Utilization efficiency of industrial Water did not become better automatically along with urbanization development; therefore, the scale and speed of urbanization should be scientifically formulated. The effects of the level of economic development, the advanced industrial structure, and the level of foreign investment are significantly negative.
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the threshold effect of environmental regulation fdi agglomeration and Water Utilization efficiency under double control actions an empirical test based on yangtze river economic belt
Water, 2019Co-Authors: Xuhui Ding, Ning Tang, Juhua HeAbstract:In this study, the SE-SBM model considering undesirable outputs was used to measure the Water Utilization efficiency of the Yangtze River Economic Belt from 2006 to 2016, and the panel threshold model was used to estimate the impact of environmental regulation and foreign direct investment (FDI) agglomeration on Water Utilization efficiency. The results show that the Water Utilization efficiency presents a “U”-shaped trend as a whole, declines incrementally along the eastern, central, and western regions of the economic belt, and that the Water Utilization efficiency of the economic belt first converges and then diverges. In the estimation of the double threshold panel model, when the per capita GDP is lower than 2.635 or greater than 12.058 thousand dollars, the environmental regulation shows a significant positive effect. Otherwise, the environmental regulation barely shows a significant negative effect. FDI has not had a great impact on Water resources Utilization efficiency, and neither the “pollution aura” nor “pollution shelter” are significant. When the per capita GDP is lower than 2.184 or greater than 12.058 thousand dollars, FDI can significantly improve the Water Utilization efficiency through environmental regulation. Besides, the positive effects of technological innovation and foreign trade dependence are significant, and so are the negative effects of industrialization. Differentiated environmental regulation policies should be formulated; industrial upgrade should be promoted; innovation of Water-saving and emission reduction should be strengthened in the Yangtze River Economic Belt.
Juhua He - One of the best experts on this subject based on the ideXlab platform.
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the threshold effect of environmental regulation fdi agglomeration and Water Utilization efficiency under double control actions an empirical test based on yangtze river economic belt
Water, 2019Co-Authors: Xuhui Ding, Ning Tang, Juhua HeAbstract:In this study, the SE-SBM model considering undesirable outputs was used to measure the Water Utilization efficiency of the Yangtze River Economic Belt from 2006 to 2016, and the panel threshold model was used to estimate the impact of environmental regulation and foreign direct investment (FDI) agglomeration on Water Utilization efficiency. The results show that the Water Utilization efficiency presents a “U”-shaped trend as a whole, declines incrementally along the eastern, central, and western regions of the economic belt, and that the Water Utilization efficiency of the economic belt first converges and then diverges. In the estimation of the double threshold panel model, when the per capita GDP is lower than 2.635 or greater than 12.058 thousand dollars, the environmental regulation shows a significant positive effect. Otherwise, the environmental regulation barely shows a significant negative effect. FDI has not had a great impact on Water resources Utilization efficiency, and neither the “pollution aura” nor “pollution shelter” are significant. When the per capita GDP is lower than 2.184 or greater than 12.058 thousand dollars, FDI can significantly improve the Water Utilization efficiency through environmental regulation. Besides, the positive effects of technological innovation and foreign trade dependence are significant, and so are the negative effects of industrialization. Differentiated environmental regulation policies should be formulated; industrial upgrade should be promoted; innovation of Water-saving and emission reduction should be strengthened in the Yangtze River Economic Belt.
Hongwen Jia - One of the best experts on this subject based on the ideXlab platform.
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Study on Urbanization Level, Urban Primacy and Industrial Water Utilization Efficiency in the Yangtze River Economic Belt
Sustainability, 2019Co-Authors: Xuhui Ding, Hongwen JiaAbstract:Considering the undesirable output, this paper adopted the data envelopment analysis (DEA) model with the slack variable and super efficiency improvement, to measure industrial Water Utilization efficiency in the Yangtze River Economic Belt. The paper also creatively introduces urbanization level and urban primacy into driver factors’ estimation by stochastic and fixed Tobit models, exploring how urbanization characteristics affected the Water Utilization in regional industrial production. The results showed that industrial Water efficiency has maintained an upward trend during the whole period, while most central and western provinces have shown a U-shaped trend of decreasing first and then rising. However, the industrial Water Utilization efficiency of central regions is the lowest, and the eastern regions are the highest, catching up with western regions. Utilization efficiency shows an overall convergence during the research period from 2005 to 2017. Regarding the factors’ estimation, both population urbanization and land urbanization negatively affected industrial Water Utilization efficiency, particularly blind expansion and disorderly development. The urban primacy meant the unbalance of urbanization, which would lead to urban diseases and pollution transfer, while the effects of urban primacy depended on the urbanization level. However, the Utilization efficiency of industrial Water did not become better automatically along with urbanization development; therefore, the scale and speed of urbanization should be scientifically formulated. The effects of the level of economic development, the advanced industrial structure, and the level of foreign investment are significantly negative.
