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Dominic C.y. Foo - One of the best experts on this subject based on the ideXlab platform.
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Towards data-driven process integration for renewable energy planning
Current Opinion in Chemical Engineering, 2021Co-Authors: Karen Gah Hie Kong, Raymond R. Tan, Dominic C.y. Foo, Bing Shen How, Sin Yong Teng, Wei Dong Leong, Jaka SunarsoAbstract:Process integration (PI) is a sub-area within the chemical engineering discipline that was established in the 1970s. It focuses on the development and use of tools for the holistic design of chemical processes; emphasis is placed on the system-level interdependencies among process units. More recently, PI tools have been applied to renewable energy planning due to mounting concerns about climate change. This article reviews recent developments in PI tools for renewable energy planning, covering both Pinch Analysis and mathematical programming, and discusses promising prospects for future research. In particular, the role of artificial intelligence in enabling data-driven energy planning with PI is discussed as a priority topic.
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graphical Pinch Analysis approach to cash flow management in engineering project
Chemical engineering transactions, 2019Co-Authors: Jason Maximino C Ongpeng, Kathleen B Aviso, Dominic C.y. Foo, Raymond R. TanAbstract:Pinch Analysis (PA) methodology was originally developed for determining feasible Heat Integration targets in process plants, and for designing optimal Heat Exchanger Networks to achieve the previously determined energy budget. This powerful methodology has since been extended to a wide range of applications, such as Mass Integration, Carbon Management and Financial PA. All these extensions have the common feature of utilizing a stream quality index that defines direction of flow, in the same way that temperature differences determine heat transfer. In this paper, a graphical PA approach to cash flow Analysis and management in engineering projects is proposed in ensuring project sustainability. This method considers the positive and negative cash flows that occur over time in an engineering project. A case study is used to illustrate how this approach can provide insights for managers to synchronize the operations of a single project to stay within the firm’s cash flow limits. Such strategies can potentially affect the sustainability of construction projects. There were three solutions considered in the case study. Based on the results, it was found that from the hypothetical example, the ideal solution is to allot 50 % or 75 % of the total inflow assigned to labour outflow with a Pinch period of 1 month. It resulted in a minimum loan value 61.2 %-months for materials outflow.
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Extended Graphical Technique for the Evaluation of Carbon Dioxide Emission Reduction Projects
Process Integration and Optimization for Sustainability, 2017Co-Authors: Dominic C.y. FooAbstract:In recent years, many industrial companies are moving towards energy conservation initiatives, as a mean for cost reduction as well as to achieve a sustainability goal. In this work, a recently developed graphical technique based on Pinch Analysis is extended to perform selection among various CO_2 reduction and energy conservation projects, to be implemented for an industrial site. The extended technique performs project selection with the priority on CO_2 reduction, rather than economic criteria. The technique is elucidated with two case studies to demonstrate its applications.
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integrating input output models with Pinch technology for enterprise sustainability Analysis
Clean Technologies and Environmental Policy, 2015Co-Authors: Xiaoping Jia, Dominic C.y. Foo, Fang Wang, Raymond R. TanAbstract:This article proposes an integrated framework for enterprise sustainability assessment by integrating enterprise input–output modeling with water Pinch Analysis. Firstly, material metabolism of an enterprise is investigated to establish a baseline; then, potential for resource conservation and waste minimization is evaluated. The environmental performance and economic feasibility of modifications are then assessed based on identification of key processes. Thus, the framework provides a method to connect material metabolism Analysis of enterprises with the implementation of specific actions for resource conservation and waste minimization. The case of the water utilization system at Wangpo coal mine in China is used to illustrate the framework developed. Two process integration scenarios, involving direct reuse/recycle and regeneration, are presented. The corresponding revised input–output models for each scenario are illustrated.
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automated targeting technique for batch process integration
Industrial & Engineering Chemistry Research, 2010Co-Authors: Dominic C.y. FooAbstract:A new targeting technique is proposed in this work to determine the minimum resource and waste targets for batch process integration problems. The technique, which is generic in nature, handles fixed-schedule batch heat and mass exchange, as well as water networks equally well. Even though the technique is formulated as a mathematical optimization model, the concept, which is built on the insight-based Pinch Analysis technique, enables the minimum resource/cost targets to be identified prior to detailed design. Five examples are solved to demonstrate the newly developed technique.
Paul Stuart - One of the best experts on this subject based on the ideXlab platform.
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linking Pinch Analysis and bridge Analysis to save energy by heat exchanger network retrofit
Applied Thermal Engineering, 2016Co-Authors: Jeanchristophe Bonhivers, Alireza Moussavi, Alberto Alvaargaez, Paul StuartAbstract:Abstract Reduction of energy requirements in the process industries results in increased profitability and better environmental performance. Methods for heat exchanger network (HEN) retrofit are based on thermodynamic Analysis and insights, numerical optimization, or combined approaches. Numerical optimization-based methods are highly complex and may not guarantee identification of the global optimum. Pinch Analysis, which is an approach based on thermodynamic Analysis and composite curves, is the most widely used in the industry. Its simplicity, the use of graphical tools, and the possibility for the user to interact at each step of the design process help identify solutions with consideration of practical feasibility. In the last few years, bridge Analysis has been developed for HEN retrofit. It includes the following tools: (a) the definition of the necessary conditions to reduce energy consumption which are expressed in the bridge formulation, (b) a method for enumerating the bridges, (c) the representation of the flow rate of cascaded heat through each existing exchanger on the energy transfer diagram (ETD), and (4) the use of the Heat Exchanger Load Diagram (HELD) to identify a suitable HEN configuration corresponding to modifications. It has been shown that reducing energy consumption implies decreasing the flow rate of cascaded heat through the existing exchangers across the entire temperature range between the hot and cold utilities. The ETD shows all possibilities to reduce the flow rate of cascaded heat through a HEN. The objective of this paper is to link these tools with the composite curves and concepts from Pinch Analysis into a consistent method for HEN retrofit. First, the relations between the composite curves, the ETD and the HELD are described, and a method for HEN retrofit which combines the insights from Pinch Analysis with the recently developed tools is proposed. Then the method is used to reduce energy consumption in three case studies. Comparison between results from Pinch Analysis and bridge Analysis shows that the latter identifies supplementary solutions to save energy. The proposed synthesis fills a gap in Pinch Analysis, and its concepts can be helpful in the development of software for HEN retrofit.
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comparison between Pinch Analysis and bridge Analysis to retrofit the heat exchanger network of a kraft pulp mill
Applied Thermal Engineering, 2014Co-Authors: Jeanchristophe Bonhivers, Elin Svensson, Thore Berntsson, Paul StuartAbstract:Pinch Analysis is based on the hot, cold and grand composite curves and is the most commonly-used approach to identify strategies for reducing energy consumption by heat exchanger network retrofit. This method was originally developed for the synthesis of new networks, and there remain certain difficulties for its application to improve existing networks. The advanced composite curves have been developed for retrofit situations specifically, and use data about existing heat exchangers to provide more information about the modifications necessary to achieve heat savings. Bridge Analysis, which is based on the energy transfer diagram, is a new method and enumerates the sets of heat transfer modifications necessary to save energy. In this paper, the grand composite curve, the advanced composite curves and the energy transfer diagram have been constructed for Analysis of the heat exchanger network of a kraft pulp mill. Links between these methods are made explicit; then results are discussed and compared. It is shown that the information provided by these approaches is consistent; however, the level of detail progressively increases from the grand composite curve to the advanced composite curves until the energy transfer diagram. Fundamentally, reducing the energy consumption implies decreasing the flow rate of heat cascaded through the network from the hot utility until the environment. As a consequence, any heat savings solution includes network modifications bridging coolers to heaters. Traditional Pinch Analysis does not provide information about the network modifications required after removal of cross-Pinch transfers, while the advanced composite curves indicate the heat savings potential attainable through modifications of few existing heat exchanger units. Bridge Analysis provides more detail about heat savings modifications, which bridge existing heaters and coolers, than traditional Pinch Analysis and the advanced composite curves do.
Jiří Jaromír Klemeš - One of the best experts on this subject based on the ideXlab platform.
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probability power Pinch Analysis targeting approach for diesel biodiesel plant integration into hybrid power systems
Energy, 2019Co-Authors: Nor Erniza Mohammad Rozali, Jiří Jaromír Klemeš, Sharifah Rafidah Wan Alwi, Zainuddin Abdul Manan, Jing Shenn CheongAbstract:Abstract The hybrid power system (HPS) that integrates diesel/biodiesel plant with renewable energy (RE) technologies has become increasingly popular to alleviate greenhouse gases emissions issue of the sole diesel/biodiesel power system. Integrated diesel-RE power system offers cleaner power supply while minimising cost of diesel fuel and diesel system maintenance. The use of Power Pinch Analysis (PoPA) method for the integration of diesel plants and RE systems into HPS with the objective to minimise fuel requirement and operational time of diesel generator has been presented. This work aims to achieve the same objective via probability theory utilisation, to simplify the PoPA procedure involving the matching of various routes for power flows. The extended technique called the Probability-Power Pinch Analysis (P-PoPA) can give accurate results as those established from the PoPA method within a shorter Analysis time because it replaces the tedious manual matching step with correction factors. All probable routes of power from RE and diesel generators to demands are considered in computing the correction factors, in order to target the minimum diesel power in the integrated system. The result of a Case Study demonstrates that 19% saving in diesel fuel consumption can be realised if the present diesel station is supported with renewable solar power in an HPS. The result of the P-PoPA method is accurate with a very minor deviation to that from the conventional PoPA technique.
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Temperature Disturbance Management in a Heat Exchanger Network for Maximum Energy Recovery Considering Economic Analysis
MDPI AG, 2019Co-Authors: Ainur Munirah Hafizan, Jiří Jaromír Klemeš, Sharifah Rafidah Wan Alwi, Zainuddin Abdul Manan, Mohd Kamaruddin Abd HamidAbstract: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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integration of diesel plant into a hybrid power system using power Pinch Analysis
Applied Thermal Engineering, 2016Co-Authors: Nor Erniza Mohammad Rozali, Zainuddin Abdul Manan, Sharifah Rafidah Wan Alwi, Wai Shin Ho, Jiří Jaromír KlemešAbstract:Diesel power systems are one of the schemes for energy supply generation. However, they are mostly associated with difficulties of emission control and cost of the maintenance on top of the diesel fuel cost. Some of these problems can be reduced by incorporating renewable energy such as wind turbines and solar PV along with the existing diesel station. Hybrid systems provide clean and reliable power supply, and can be more cost-effective than sole diesel systems. This paper assesses the feasibility of expanding an existing diesel power plant into a hybrid power system (HPS) using Power Pinch Analysis (PoPA). A HPS configuration developed using PoPA methodology can provide close-to-optimal solar and wind electricity supplies while minimising the diesel generation. Results show that a HPS that combines solar and wind system with diesel power generation can provide significant diesel fuel savings while satisfying the demands at a reasonable cost.
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Total Site Heat Integration Targeting Algorithm Incorporating Plant Layout Issues
Computer-aided chemical engineering, 2014Co-Authors: Peng Yen Liew, Sharifah Rafidah Wan Alwi, Jiří Jaromír KlemešAbstract:Energy Efficiency has gained concern in the process industry due to the high energy consumption. Process Integration using Pinch Analysis plays an important role in enhancing the sustainability and the profitability margin of industrial processes. Total Site Heat Integration (TSHI) is one of the main branches of Process Integration based on Pinch Analysis technique, which is an industrial energy conservation strategy across individual process boundary. However, the pressure drop and heat loss on the steam mains have not been well discussed in the existing TS targeting methodologies. In this paper, an extended numerical algorithm is proposed for addressing the effects of plant layout to the minimum multiple utility targets. The extended tools are able to assist the designer to perform a preliminary assessment of the retrofit options for a steam system. This enhanced methodology improves the accuracy of the existing TS targeting methodology by considering the effects of plant layout in a TS system. The proposed methodology is demonstrated with an illustrative case study.
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forty years of heat integration Pinch Analysis pa and mathematical programming mp
Current opinion in chemical engineering, 2013Co-Authors: Jiří Jaromír Klemeš, Zdravko KravanjaAbstract:Process Integration (PI) supporting Process Design, Integration, and Optimisation has been around from the early 1970s. PI was developed originally from Heat Integration, which remains the cornerstone for PI continuous advance. It has been closely related to the development of Chemical, Mechanical and Power Engineering supported by the extended implementation of mathematical modelling, simulation and optimisation, and by the application of information technology. Its development has accelerated over the years as its methodology has been able to provide answers and support for important issues regarding economic development — better utilisation and savings regarding energy, water, and other resources. This contribution is targeting towards providing at least a short overview of its historical development, achievements, and future challenges.
Raymond R. Tan - One of the best experts on this subject based on the ideXlab platform.
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Towards data-driven process integration for renewable energy planning
Current Opinion in Chemical Engineering, 2021Co-Authors: Karen Gah Hie Kong, Raymond R. Tan, Dominic C.y. Foo, Bing Shen How, Sin Yong Teng, Wei Dong Leong, Jaka SunarsoAbstract:Process integration (PI) is a sub-area within the chemical engineering discipline that was established in the 1970s. It focuses on the development and use of tools for the holistic design of chemical processes; emphasis is placed on the system-level interdependencies among process units. More recently, PI tools have been applied to renewable energy planning due to mounting concerns about climate change. This article reviews recent developments in PI tools for renewable energy planning, covering both Pinch Analysis and mathematical programming, and discusses promising prospects for future research. In particular, the role of artificial intelligence in enabling data-driven energy planning with PI is discussed as a priority topic.
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graphical Pinch Analysis approach to cash flow management in engineering project
Chemical engineering transactions, 2019Co-Authors: Jason Maximino C Ongpeng, Kathleen B Aviso, Dominic C.y. Foo, Raymond R. TanAbstract:Pinch Analysis (PA) methodology was originally developed for determining feasible Heat Integration targets in process plants, and for designing optimal Heat Exchanger Networks to achieve the previously determined energy budget. This powerful methodology has since been extended to a wide range of applications, such as Mass Integration, Carbon Management and Financial PA. All these extensions have the common feature of utilizing a stream quality index that defines direction of flow, in the same way that temperature differences determine heat transfer. In this paper, a graphical PA approach to cash flow Analysis and management in engineering projects is proposed in ensuring project sustainability. This method considers the positive and negative cash flows that occur over time in an engineering project. A case study is used to illustrate how this approach can provide insights for managers to synchronize the operations of a single project to stay within the firm’s cash flow limits. Such strategies can potentially affect the sustainability of construction projects. There were three solutions considered in the case study. Based on the results, it was found that from the hypothetical example, the ideal solution is to allot 50 % or 75 % of the total inflow assigned to labour outflow with a Pinch period of 1 month. It resulted in a minimum loan value 61.2 %-months for materials outflow.
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integrating input output models with Pinch technology for enterprise sustainability Analysis
Clean Technologies and Environmental Policy, 2015Co-Authors: Xiaoping Jia, Dominic C.y. Foo, Fang Wang, Raymond R. TanAbstract:This article proposes an integrated framework for enterprise sustainability assessment by integrating enterprise input–output modeling with water Pinch Analysis. Firstly, material metabolism of an enterprise is investigated to establish a baseline; then, potential for resource conservation and waste minimization is evaluated. The environmental performance and economic feasibility of modifications are then assessed based on identification of key processes. Thus, the framework provides a method to connect material metabolism Analysis of enterprises with the implementation of specific actions for resource conservation and waste minimization. The case of the water utilization system at Wangpo coal mine in China is used to illustrate the framework developed. Two process integration scenarios, involving direct reuse/recycle and regeneration, are presented. The corresponding revised input–output models for each scenario are illustrated.
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a graphical representation of carbon footprint reduction for chemical processes
Journal of Cleaner Production, 2010Co-Authors: Wendy Tjan, Raymond R. Tan, Dominic C.y. FooAbstract:Climate change has recently become a major focus for industry and government agencies. Some recent works have been reported on the use of Pinch Analysis techniques for carbon-constrained energy planning problems. This paper discusses a new application of graphical technique based on Pinch Analysis for company-level visualization and Analysis of carbon footprint improvement. The technique is based on the decomposition of total carbon footprint into material- and energy-based components, or alternatively, into internal and external components. The decomposition facilitates the evaluation and screening of process improvement alternatives. Two industrial case studies on the production of phytochemical extracts and bulk chemicals are used to illustrate the new extension.
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the use of graphical Pinch Analysis for visualizing water footprint constraints in biofuel production
Applied Energy, 2009Co-Authors: Raymond R. Tan, Dominic C.y. Foo, Kathleen B AvisoAbstract:A graphical Pinch approach for Analysis of water footprint constraints on biofuel production systems is presented. The technique is based on the composite curve method which was originally developed for carbon-constrained energy planning, which is extended in this paper based on the underlying similarities of source-sink allocation problems. The Pinch Analysis approach enables limiting water footprint conditions to be identified, and provides insights that are useful for planning the large-scale cultivation of biofuel crops. An illustrative case study based on the bioethanol program of the Philippines is solved using the proposed approach.
Changkyoo Yoo - One of the best experts on this subject based on the ideXlab platform.
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a novel approach for optimal energy recovery using pressure retarded osmosis technology chemical exergy Pinch Analysis case study in a sugar mill plant
Energy Conversion and Management, 2020Co-Authors: Usman Safder, Pouya Ifaei, Changkyoo YooAbstract:Abstract In the present study, Pinch Analysis is extended taking chemical exergy concept into account. The novel chemical exergy Pinch Analysis is proposed for sustainable power production by an economic application of pressure retarded osmosis membranes in chemical industries. Chemical exergy composite curves and chemical exergy cascade tables are developed as graphical and numerical tools, respectively. The tools are used to obtain maximum waste energy recovery by achieving various targets and determining the Pinch point in a salinity gradient network. Thus, maximum energy recovery and minimum waste treatment are targeted, simultaneously. Moreover, a mathematical model follows the chemical exergy Pinch Analysis for an economic evaluation of pressure retarded osmosis-retrofitted industries under three probable scenarios. A sugar mill plant is simulated as the case study to validate the model-based Analysis. The results showed that chemical exergy Pinch Analysis could efficiently provide the optimal pressure retarded osmosis -retrofitted industrial networks for decision-making. Having analysed the complex chemical exergy streams by chemical exergy Pinch Analysis, 11.30 MW net power is recovered with 0.038 $/kWh levelized cost of energy in the case study.
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a novel kalina power cooling cycle with an ejector absorption refrigeration cycle thermodynamic modelling and Pinch Analysis
Energy Conversion and Management, 2018Co-Authors: Jouan Rashidi, Changkyoo YooAbstract:Abstract A new power and cooling cogeneration cycle is proposed that combines the Kalina power cycle and the ejector absorption refrigeration cycle with an ammonia-water mixture as the working fluid. The proposed system, Kalina power-cooling with an ejector cycle (KPCE), originates from the Kalina power and cooling cycle (KPCC) and introduces an ejector before the evaporator. Thermodynamic analyses from the viewpoints of energy efficiency, as well as comparisons between KPCC and KPCE under the same initial conditions, were conducted for the cycles’ refrigeration output and thermal efficiency. Energy Analysis results showed that the KPCE provides a performance improvement without greatly increasing system complexity. At the same power production level, the refrigeration output and thermal efficiency of KPCE is 13.5% higher and 17% more than KPCC, respectively. Energy losses due to inefficient heat recovery design of the system are identified by cross heat Pinch Analysis. All three preheaters of the system showed an inefficient design of heat recovery. After redesigning, power, and power-cooling efficiencies showed 7% and 4.3% increases, respectively. The effect of four important input parameters including three pressure levels and ammonia mass fraction on the KPCE performance are investigated to optimize the system. The optimized KPCE performance improved by 17.9% and 13.6% for power and power-cooling efficiency while the total annual cost of the system could decrease by 6.8%.
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extended power Pinch Analysis epopa for integration of renewable energy systems with battery hydrogen storages
Renewable Energy, 2015Co-Authors: Iman Janghorban Esfahani, Seungchul Lee, Changkyoo YooAbstract:An extended-power Pinch Analysis (EPoPA) is proposed as a means of extending the power Pinch Analysis (PoPA) for optimal design of renewable energy systems with battery and hydrogen storage (RES-BH). The EPoPA concept is based on the storage of wasted electricity that cannot be stored by the battery bank designed by PoPA. This energy is stored in the form of hydrogen and is discharged in the form of electricity when the external electricity source is needed. EPoPA graphical and numerical tools are introduced to determine the minimum required external electricity source, wasted electricity sources, and appropriate hydrogen storage system capacity of the RES-BH system during first and normal operation years. Furthermore, the integration of the RES-BH system with a diesel generator as a high reliable system is investigated in view point of economic. The optimal sizes of diesel generator and hydrogen storage system components, such as electrolyzer, fuel cell and hydrogen tank are obtained with the minimization of the total annual cost (TAC) of the system. The implementation results of the EPoPA tools on three possible case studies indicate that EPoPA, unlike other process integration methodologies such as PoPA, is able to optimally design RES-BH systems.
