The implementation of inter-plant heat integration among multiple plants. Part I: A novel screening algorithm

Song, Runrun; Tang, Qikui; Wang, Yufei; Feng, Xiao; El‐Halwagi, Mahmoud M.

doi:10.1016/j.energy.2017.09.039

Cited by 20 publications

(14 citation statements)

References 41 publications

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“…Song et al, combined the strengths of PA and MP in their work. In the first step, they divided the problem into smaller sections using an algorithm based on PA [36]. Then they carried out HEN synthesis of each section and finally optimised the inter-plant flows taking into account the pumping and piping costs [37].…”

Section: State Of the Artmentioning

confidence: 99%

Incorporating Location Aspects in Process Integration Methodology

2019

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The large potential for waste resource and heat recovery in industry has been motivating research toward increasing efficiency. Process integration methods have proven to be effective tools in improving industrial sites while decreasing their resource and energy consumption; however, location aspects and their impact are generally overlooked. This paper presents a method based on process integration, which considers the location of plants. The impact of the locations is included within the mixed integer linear programming framework in the form of heat losses, temperature and pressure drop, and piping cost. The objective function is selected as minimisation of the total cost of the system excluding piping cost and -constraints are applied on the piping cost to systematically generate multiple solutions. The method is applied to a case study with industrial plants from different sectors. First, the interaction between two plants and their utility integration are illustrated, depending on the piping cost limit which results in the heat pump and boiler on one site being gradually replaced by excess heat recovered from the other plant. Then, the optimisation of the whole system is carried out, as a large-scale application. At low piping cost allowances, heat is shared through high pressure steam in above-ground pipes, while at higher piping cost limits the system switches toward lower pressure steam sharing in underground pipes. Compared to the business-as-usual operation of the sites, the optimal solution obtained with the proposed method leads to 20% reduction in the overall cost of the system, including the piping cost. Further reduction in the cost is possible using a state of the art method but the technical and economic feasibility is not guaranteed. Thus, the present work provides a tool to find optimal industrial symbiosis solutions under different investment limits on the infrastructure between plants.

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Section: State Of the Artmentioning

confidence: 99%

Incorporating Location Aspects in Process Integration Methodology

2019

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“…This methodology enabled designers to identify the potential process changes to maximise energy recovery and reduce utility consumption. Song et al [24] further implemented the plus-minus principle for inter-plant heat integration (IPHI) for case studies involving threshold problems. The proposed methodology provides a simple technique of rapidly assessing the effect of supply temperature (T S ) fluctuations in heat recovery and utility reduction without the need for detailed process simulation.…”

Section: Introductionmentioning

confidence: 99%

Temperature Disturbance Management in a Heat Exchanger Network for Maximum Energy Recovery Considering Economic Analysis

et al. 2019

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The design of heat exchanger networks (HEN) in the process industry has largely focused on minimisation of operating and capital costs using techniques such as pinch analysis or mathematical modelling. Aspects of operability and flexibility, including issues of disturbances affecting downstream processes during the operation of highly integrated HEN, still need development. This work presents a methodology to manage temperature disturbances in a HEN design to achieve maximum heat recovery, considering the impact of supply temperature fluctuations on utility consumption, heat exchanger sizing, bypass placement and economic performance. Key observations have been made and new heuristics are proposed to guide heat exchanger sizing to consider disturbances and bypass placement for cases above and below the HEN pinch point. Application of the methodology on two case studies shows that the impact of supply temperature fluctuations on downstream heat exchangers can be reduced through instant propagation of the disturbances to heaters or coolers. Where possible, the disturbances have been capitalised upon for additional heat recovery using the pinch analysis plus-minus principle as a guide. Results of the case study show that the HEN with maximum HE area yields economic savings of up to 15% per year relative to the HEN with a nominal HE area.

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“…Ramanaiah and Khanam and Walmsley et al both studied the application of TSHI for the industrial-based problem, with applications on sponge iron cluster and dairy plant . Song et al , introduced screening and implementation approaches for interplant heat integration using optimization techniques.…”

Section: Introductionmentioning

confidence: 99%

A Decomposition-Based Approach for the Optimum Integration of Heating Utility and Phase Separation Systems in Oil and Gas Platform

Diban

El‐Halwagi

Foo

2019

Ind. Eng. Chem. Res.

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In this paper, a recently established automated targeting model (ATM) for a heating utility system is extended to integrate the phase separation system in an oil and gas platform to determine its optimum overall cost. A heating medium is used at the oil and gas platform to reduce the viscosity of heavy crude oil from the well and to facilitate the separation process by reducing the size and cost of the separators. The downside of this approach is the additional cost associated with increased heating utility. Therefore, an optimization approach is needed to reconcile the various objectives and to minimize the overall cost. The proposed approach makes use of the pinch analysis-based ATM to find the optimum trade-off between the heating medium system and separation processes. For the ATM, a novel algorithm is introduced to automate the process for temperature sorting and also to locate the heating medium users in their associated temperature intervals. This enables the utility targeting step to be performed despite the changes in temperatures of the heating medium at the crude oil heaters; the latter are located upstream of the crude oil separators. The optimization problem is decomposed into two subproblems. First, the phase separators are sized for optimum cost based on different inlet temperatures. These optimum costs are then associated with the heating utility system by the choice of outlet temperatures at the heaters. Next, the model is solved for overall optimum cost. An industrial case study is used to elucidate the application of the newly proposed approach.

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The implementation of inter-plant heat integration among multiple plants. Part I: A novel screening algorithm

Cited by 20 publications

References 41 publications

Incorporating Location Aspects in Process Integration Methodology

Incorporating Location Aspects in Process Integration Methodology

Temperature Disturbance Management in a Heat Exchanger Network for Maximum Energy Recovery Considering Economic Analysis

A Decomposition-Based Approach for the Optimum Integration of Heating Utility and Phase Separation Systems in Oil and Gas Platform

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