Optimal retrofit design and operation of the steam-supply system of a chemical complex

Halász, László; Nagy, Albert; Ivicz, T.; Friedler, Ferenc; Fan, L. T.

doi:10.1016/s1359-4311(02)00011-x

Cited by 16 publications

(6 citation statements)

References 6 publications

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“…This novel approach opened a new opportunity of the PI approach. Halasz et al [154,155] presented a novel tool, especially important for the retrofit design. An optimal design and operation of an existing steam-supply system of a chemical complex was demonstrated using P-graph, the decision-mapping, combinatorial algorithms, and the accelerated branch-and-bound method.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Process integration, modelling and optimisation for energy saving and pollution reduction

Friedler

2010

Applied Thermal Engineering

150

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Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Process integration, modelling and optimisation for energy saving and pollution reduction

Friedler

2010

Applied Thermal Engineering

150

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“…In [3] the optimisation of steam-supply systems under variable energy demands was also studied. The variable trend of the heat-power demand in the time is discretised in a piecewiseconstant manner by approximating it with a set of rectangles whose heights correspond to the power/steam demands for the corresponding periods.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

“…They are common in utility systems due to the changes in process demands [3]. Another recent development has been the integration of renewable energy sources into the energy supply and utility systems in particular, also taking the advantage of joining additional energy users to the industry -e.g.…”

Section: Introductionmentioning

confidence: 99%

Utility systems operation: Optimisation-based decision making

Velasco-Garcia

Varbanov²,

Arellano‐García

et al. 2011

Applied Thermal Engineering

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Utility systems provide heat and power to industrial sites. The importance of operating these systems in an optimal way has increased significantly due to the unstable and in the long term rising prices of fossil fuels as well as the need for reducing the greenhouse gas emissions.This paper presents an analysis of the problem for supporting operator decision-making under conditions of variable steam demands from the production processes on an industrial site. An optimisation model has been developed, where besides for running the utility system, also the costs associated with starting up the operating units have been modelled. The illustrative case study shows that accounting for the shutdowns and start-ups of utility operating units can bring significant cost savings.

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“…Figure 1 represents a process network featuring operating units O 1 , O 2 , and O 3 and materials M 1 -M 6 , where M 1 , M 2 , and M 3 are raw materials; M 4 is an intermediate; M 5 is a product; and M 6 is a byproduct. P-graph frameworks have been utilized in many areas such as emission reduction, 24 optimal retrofit design for a steam-supply system, 25 and downstream processes for biochemical production. 26 1.4.…”

Section: Introductionmentioning

confidence: 99%

“…P-graph frameworks have been utilized in many areas such as emission reduction, optimal retrofit design for a steam-supply system, and downstream processes for biochemical production …”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sustainable Energy Supply Chain by the P-graph Framework

Vance

Cabezas

Heckl

et al. 2012

Ind. Eng. Chem. Res.

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The present work proposes a computer-aided methodology for designing sustainable supply chains in terms of sustainability metrics by utilizing the P-graph framework. The methodology is an outcome of the collaboration between the Office of Research and Development (ORD) of the U.S. EPA and the research group led by the creators of the P-graph framework at the University of Pannonia. The integration of supply chain design and sustainability is the main focus of this collaboration. The P-graph framework provides a mathematically rigorous procedure for synthesizing optimal and alternative suboptimal networks subject to multiple objectives and constraints, which include profitability and sustainability in the proposed methodology. Specifically, to evaluate the sustainability of a given process under construction including its supply chain, sustainability metrics are incorporated into the design procedure. The proposed methodology is demonstrated with the optimal design of a supply chain for providing heat and electric power to an agricultural region with relatively limited land area where agricultural wastes can potentially be recovered as renewable resources. The objective functions for optimization comprise the profit and the ecological footprint. The results of the study indicate that, compared to using electricity from the grid and/or natural gas, using renewable energy resources can yield substantial cost reductions of up to 5%, as well as significant ecological footprint reductions of up to 77%. It may, therefore, be possible to design more sustainable supply chains that are both cost-effective and less environmentally damaging.

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Optimal retrofit design and operation of the steam-supply system of a chemical complex

Cited by 16 publications

References 6 publications

Process integration, modelling and optimisation for energy saving and pollution reduction

Process integration, modelling and optimisation for energy saving and pollution reduction

Utility systems operation: Optimisation-based decision making

Synthesis of Sustainable Energy Supply Chain by the P-graph Framework

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