@article{MTMT:2199079, title = {Total footprints-based multi-criteria optimisation of regional biomass energy supply chains}, url = {https://m2.mtmt.hu/api/publication/2199079}, author = {Čuček, L and Varbanov, Petar and Klemeš, Jiri Jaromir and Kravanja, Z}, doi = {10.1016/j.energy.2012.01.040}, journal-iso = {ENERGY}, journal = {ENERGY}, volume = {44}, unique-id = {2199079}, issn = {0360-5442}, abstract = {This paper presents a MCO (multi-criteria optimisation) of regional biomass supply chains for the conversion of biomass to energy through the simultaneous maximisation of economic performance and minimisation of the environmental and social FPs (footprints). The energy supply-chain model contains agricultural, pre-processing, processing, and distribution layers. An integrated model, previously developed by the authors, for regional biomass energy network optimisation is used as a basis, and now extended for simultaneous assessment of the supply-chain performance based on LCA (Life cycle assessment). Several total FPs are introduced for " cradle" to " grave" evaluation, which, besides direct, comprises also indirect effects caused by products' substitutions. In the MCO approach, the annual profit is maximised against each FP generating different sets of Pareto optimal solutions, one for each FP. With this approach the aggregation of different environmental and/or social pressures is thus avoided. The results indicate that total FPs enable the obtaining of more realistic solutions, than in those cases when only direct FPs are considered. More profitable and less environmentally harmful solutions can be gained with significant reduction in total carbon and total energy FPs. © 2012 Elsevier Ltd.}, keywords = {Optimization; life cycle; BIOMASS; Profitability; Energy resources; Total organic carbon; Regional Energy Supply Chains; Footprints; Bio-mass energy; LCA; Energy supply chains; Optimisations; biomass power; Supply chains; Ecological footprint; electricity generation; electricity supply; Total footprints; Multi-criteria optimisation; Biomass energy generation}, year = {2012}, eissn = {1873-6785}, pages = {135-145} } @article{MTMT:2060125, title = {Extending Process-Network Synthesis Algorithms with Time Bounds for Supply Network Design}, url = {https://m2.mtmt.hu/api/publication/2060125}, author = {Kalauz, Károly and Süle, Zoltán and Bertók, Botond and Friedler, Ferenc and Fan, L T}, doi = {10.3303/CET1229044}, journal-iso = {CHEM ENG TR}, journal = {CHEMICAL ENGINEERING TRANSACTIONS}, volume = {29}, unique-id = {2060125}, issn = {1974-9791}, year = {2012}, eissn = {2283-9216}, pages = {259-264}, orcid-numbers = {Kalauz, Károly/0009-0007-5888-5541; Bertók, Botond/0000-0002-1297-9792} } @article{MTMT:1690541, title = {Solving vehicle assignment problems by process-network synthesis to minimize cost and environmental impact of transportation}, url = {https://m2.mtmt.hu/api/publication/1690541}, author = {Barany, M and Bertók, Botond and Kovács, Zoltán and Friedler, Ferenc and Fan, L T}, doi = {10.1007/s10098-011-0348-2}, journal-iso = {CLEAN TECHNOL ENVIRON POLICY}, journal = {CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY}, volume = {13}, unique-id = {1690541}, issn = {1618-954X}, year = {2011}, eissn = {1618-9558}, pages = {637-642}, orcid-numbers = {Bertók, Botond/0000-0002-1297-9792} } @article{MTMT:1674648, title = {Regional renewable energy and resource planning}, url = {https://m2.mtmt.hu/api/publication/1674648}, author = {Lam, H L and Varbanov, Petar and Klemeš, Jiri Jaromir}, doi = {10.1016/j.apenergy.2010.05.019}, journal-iso = {APPL ENERG}, journal = {APPLIED ENERGY}, volume = {88}, unique-id = {1674648}, issn = {0306-2619}, abstract = {The exploitation of the energy potential in biomass in a specific geographical region is frequently constrained by high production costs and the amount of land required per unit of energy generated. In addition, the distributed nature of the biomass resource and its normally low energy density may result in large transportation costs. Biomass also requires large land areas to collect and process the incoming solar radiation before the energy can be harvested. Previously published works on regional energy clustering (REC) and the Regional Resources Management Composite Curve, RRMCC (in this paper shortened to RMC), have been extended in this paper to tackle simultaneously the issues of the biomass supply chain, transportation, and land use. The RMC is a tool for supporting decision making in regional resource management. It provides a complete view of energy and land availability in a region, displaying their trade-offs in a single plot. The extension presented in this work has been developed in two steps. The first step presents the Regional Energy Cascade Analysis, which estimates the energy target within regional supply chains and provides the result for energy exchange flows between zones, the quantity of energy required to be imported/exported, and the locations of the demands. In the second step, the initial results are analysed against potential measures for improving the energy and land use targets by using the RMC and a set of rules for its manipulation. The presented method provides the option to assess the priorities: either to produce and sell the surplus energy on the fuel market or use the land for other purposes such as food production. This extended approach is illustrated with a comprehensive case study demonstrating that with the RMC application it is possible to maximise the land use and to maximise the biofuel production for the requested energy demand. © 2010 Elsevier Ltd.}, keywords = {BIOMASS; Supply chain management; decision making; solar power; renewable resource; energy planning; Solar energy; Energy management; Carbon sequestration; TRADE-OFF; solar radiation; curve fitting; resource allocation; biofuel; transportation economics; regional planning; exploitation; biomass power; alternative energy; Energy harvesting; Supply chains; Sun; Land use; Energy cascade; Resource planning; Renewables; Regional energy clustering; Regional Energy Cascade Analysis; Carbon footprint minimisation; Biomass supply chain}, year = {2011}, eissn = {1872-9118}, pages = {545-550} } @article{MTMT:1696063, title = {Model-size reduction techniques for large-scale biomass production and supply networks. PRES 2010}, url = {https://m2.mtmt.hu/api/publication/1696063}, author = {Lam, Hon Loong and Klemeš, Jiri Jaromir and Kravanja, Zdravko}, doi = {10.1016/j.energy.2011.03.036}, journal-iso = {ENERGY}, journal = {ENERGY}, volume = {36}, unique-id = {1696063}, issn = {0360-5442}, abstract = {This paper is concerned with developing several model-size reduction techniques for the analysis of large-scale renewable production and supply networks. They are (i) Reducing the connectivity in a biomass supply chain network, (ii) Eliminating unnecessary variables and constraints, (iii) Merging the collection centres. The proposed model-size reduction techniques brought computational time improvements of several magnitudes compared, with the high performance linear system solution techniques and still with a little loss in accuracy. When the methods are combined the time reductions are more significant. A proposed procedure for combining the methods can be implemented for any supply chain model with a large number of components.}, keywords = {Biomass supply chain; Model-size reduction techniques; MILP}, year = {2011}, eissn = {1873-6785}, pages = {4599-4608} } @article{MTMT:1690078, title = {Cell-based dynamic heat exchanger models – Direct determination of the cell number and size}, url = {https://m2.mtmt.hu/api/publication/1690078}, author = {Varbanov, Petar and Klemeš, Jiri Jaromir and Friedler, Ferenc}, doi = {10.1016/j.compchemeng.2011.01.033}, journal-iso = {COMPUT CHEM ENG}, journal = {COMPUTERS & CHEMICAL ENGINEERING}, volume = {35}, unique-id = {1690078}, issn = {0098-1354}, year = {2011}, eissn = {1873-4375}, pages = {943-948} } @article{MTMT:1695506, title = {Optimal Design of Supply Chains by P-garph Framework under Uncertainties}, url = {https://m2.mtmt.hu/api/publication/1695506}, author = {Süle, Zoltán and Bertók, Botond and Friedler, Ferenc and L T, Fan}, doi = {10.3303/CET1125076}, journal-iso = {CHEM ENG TR}, journal = {CHEMICAL ENGINEERING TRANSACTIONS}, volume = {25}, unique-id = {1695506}, issn = {1974-9791}, year = {2011}, eissn = {2283-9216}, pages = {453-458}, orcid-numbers = {Bertók, Botond/0000-0002-1297-9792} } @article{MTMT:1674660, title = {Synthesis of regional networks for the supply of energy and bioproducts}, url = {https://m2.mtmt.hu/api/publication/1674660}, author = {Čuček, L and Lam, H L and Klemeš, Jiri Jaromir and Varbanov, Petar and Kravanja, Z}, doi = {10.1007/s10098-010-0312-6}, journal-iso = {CLEAN TECHNOL ENVIRON POLICY}, journal = {CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY}, volume = {12}, unique-id = {1674660}, issn = {1618-954X}, abstract = {This article presents a method for the synthesis of regional renewable energy supply chains, based on Mixed-Integer Linear Programming (MILP). This method addresses the challenges presented by biomass resources. The main challenges are the distributive and varied availabilities regarding both location and time. This work also aims to maximise the economically viable utilisation of resources, accounting for the competition between energy and food production. A four-layer supply chain superstructure has been developed, which includes the harvesting, preparation, core processing and distribution of products. This considered system's boundaries involve a region, which is then divided into zones for optimising conversion operations and transportation flows. An MILP model has been formulated with profit maximisation as the optimisation criterion. The environmental impact is evaluated by the carbon footprint. The sensitivity of the optimal solutions is analysed for different regions' sizes, transportation costs, pre-processing alternatives and the co-production of food and energy. © Springer-Verlag 2010. Biomass supply chains,.}, keywords = {Regional energy and food networks; Bioenergy generation; Carbon footprint}, year = {2010}, eissn = {1618-9558}, pages = {635-645} } @article{MTMT:1674668, title = {Minimising carbon footprint of regional biomass supply chains}, url = {https://m2.mtmt.hu/api/publication/1674668}, author = {Lam, H L and Varbanov, Petar and Klemeš, Jiri Jaromir}, doi = {10.1016/j.resconrec.2009.03.009}, journal-iso = {RESOUR CONSERV RECY}, journal = {RESOURCES CONSERVATION AND RECYCLING}, volume = {54}, unique-id = {1674668}, issn = {0921-3449}, abstract = {A new method for regional energy targeting and supply chain synthesis is presented. A demand-driven approach is applied to assess the feasible ways for transferring energy from renewable sources to customers in a given region. The studied region is partitioned into a number of clusters by using the developed Regional Energy Clustering (REC) algorithm. The REC targets aim at minimising the system carbon footprint (CFP). The biomass energy supply and management are targeted using new graphical representations. Regional Energy Surplus-Deficit Curves (RESDC) visualises the formation and the sizes of introduced energy clusters. Regional Resource Management Composite Curve (RRMCC) an analogy of the Process Integration approach shows the energy imbalances helping in trading-off resources management. These graphical tools provide straightforward information of how to manage the surplus resources (biomass and land use) in a region. © 2009 Elsevier B.V. All rights reserved.}, keywords = {ARTICLE; ALGORITHM; controlled study; BIOMASS; Supply chain management; energy balance; energy resource; Cluster Analysis; Energy conservation; renewable resource; Energy transfer; Clustering algorithms; TRADE-OFF; Graphic methods; greenhouse gas; biomass energy; resource management; Supply chain synthesis; Resources management; Renewable sources; Regional resources; Number of clusters; Graphical tools; Energy imbalances; Bio-mass energy; Graphical representations; Carbon footprint; biomass power; Supply chains; Land use; Regional energy clustering; Carbon footprint minimisation; Biomass supply chain; Composite curves; Process integration}, year = {2010}, eissn = {1879-0658}, pages = {303-309} } @article{MTMT:1674664, title = {Optimisation of regional energy supply chains utilising renewables: P-graph approach}, url = {https://m2.mtmt.hu/api/publication/1674664}, author = {Lam, H L and Varbanov, Petar and Klemeš, Jiri Jaromir}, doi = {10.1016/j.compchemeng.2009.11.020}, journal-iso = {COMPUT CHEM ENG}, journal = {COMPUTERS & CHEMICAL ENGINEERING}, volume = {34}, unique-id = {1674664}, issn = {0098-1354}, abstract = {This paper presents a new method for regional energy targeting and supply chain synthesis. The method is based on a novel approach to the optimisation of renewable energy supply. A new algorithm for revealing energy supply chain clusters is introduced, described and illustrated by a case study. It has been developed on two levels. The first is a top-level supply chain network with lowest Carbon Footprint generated. It consists of a number of zone clusters. The definition of zones is provided; it can be e.g. a village or a town. Each zone is considered as a unit. At the second level is a supply chain synthesis carried out by P-graph based optimisation within each cluster. It provides a more detailed analysis. The use of the P-graph framework as a synthesis toolset provides a strong mathematically proven fundament for handling the complexity of the synthesis problem. It contributes to the optimal network design with a high computational efficiency. This approach contributes to the cleaner generation of energy from biomass, approaching CO2 neutrality as much as possible. It is beneficial for extending the use of biomass as a renewable source of energy. © 2010.}, keywords = {Optimization; BIOMASS; Supply chain management; Renewable energy source; Renewable energy sources; Clustering algorithms; Computational efficiency; Process graphs; P-graphs; Regional Energy Clustering Algorithm; Process graph (P-graph); Biomass supply chain synthesis; Carbon footprint; Supply chains; Carbon footprint minimisation; Biomass supply chain}, year = {2010}, eissn = {1873-4375}, pages = {782-792} } @inproceedings{MTMT:24803879, title = {Cell-based dynamic heat exchanger models - direct determination of the cell number and size}, url = {https://m2.mtmt.hu/api/publication/24803879}, author = {Varbanov, Petar and Klemeš, Jiri Jaromir and Friedler, Ferenc}, booktitle = {20th European Symposium on Computer Aided Process}, doi = {10.1016/S1570-7946(10)28074-4}, unique-id = {24803879}, abstract = {Large amounts of thermal energy are transferred to for heating or cooling in the industry as well as in the other sectors. Typical examples are crude oil preheating, ethylene plants, exothermic and endothermic reactions and many others. Heat exchangers frequently operate under varying conditions. Their appropriate use in flexible heat exchanger networks as well as maintenance/reliability related calculations require adequate models for estimating their dynamic behaviour. Cell-based dynamic models are very often used to represent heat exchangers with varying arrangements. The paper describes a direct method and a visualisation technique for determining the number of the modelling cells and their size. © 2010 Elsevier B.V.}, keywords = {Dynamic heat exchanger modelling; Cell models}, year = {2010}, pages = {439-444} } @article{MTMT:34202539, title = {Process integration, modelling and optimisation for energy saving and pollution reduction}, url = {https://m2.mtmt.hu/api/publication/34202539}, isbn = {9788895608044}, author = {Friedler, Ferenc}, doi = {10.3303/CET0918001}, journal-iso = {CHEM ENG TR}, journal = {CHEMICAL ENGINEERING TRANSACTIONS}, volume = {18}, unique-id = {34202539}, issn = {1974-9791}, abstract = {Energy saving, global warming and greenhouse gas emissions have become major technological, societal, and political issues. Being closely related to energy supply, they are of strategic importance. Various conferences are being organised for providing international avenues for closer cooperation among researchers. The series of conferences "Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction" (PRES) play a pioneering role in contributing to the solution of the related problems through presenting new methodologies and initiating cooperation among participants that often result in international projects. The PRES conferences have been dedicated both to the theoretical and to the practical components of the problems of energy saving and pollution reduction. The PRES series, established twelve years ago, was originally dedicated to energy integration and improving thermal efficiency. Following the new challenges and priorities the scope of the conferences has been extended to include all energy and pollution prevention related issues. This contribution focuses on the period covered by PRES, reviewing at least some major presentations contributing to the development of process integration and optimisation tools for energy saving and pollution reduction. The development of the mathematical models has been covered as well, since it is closely related to the area. Copyright © 2009, AIDIC Sarvizi S.r.l.}, year = {2009}, eissn = {2283-9216}, pages = {1-26} } @article{MTMT:1268041, title = {P-graph methodology for cost-effective reduction of carbon emissions involving fuel cell combined cycles}, url = {https://m2.mtmt.hu/api/publication/1268041}, author = {Varbanov, Petar and Friedler, Ferenc}, doi = {10.1016/j.applthermaleng.2008.02.007}, journal-iso = {APPL THERM ENG}, journal = {APPLIED THERMAL ENGINEERING}, volume = {28}, unique-id = {1268041}, issn = {1359-4311}, abstract = {Fuel cells are under extensive investigation for building combined energy cycles due to the higher efficiency potential they offer. Two kinds of high-temperature fuel cells (HTFC) have been identified as best candidates for fuel cell combined cycles (FCCC) - molten carbonate fuel cells (MCFC) and solid oxide fuel cells (SOFC). The paper presents a procedure for the evaluation of energy conversion systems involving FCCC subsystems, utilising biomass and/or fossil fuels, providing a tool for evaluation of the trends in CO, emission levels and economics of such systems. This involves significant combinatorial complexity, efficiently handled by the P-graph algorithms. Promising system components are evaluated using the P-graph framework and a methodology for the synthesis of cost-optimal FCCC configurations is developed, accounting for the carbon footprint of the various technology and fuel options. The results show that such systems employing renewable fuels can be economically viable for a wide range of economic conditions, mainly due to the high energy efficiency of the FC-based systems.}, year = {2008}, eissn = {1873-5606}, pages = {2020-2029} } @article{MTMT:1044769, title = {Graph-theoretic approach for identifying catalytic or metabolic pathways}, url = {https://m2.mtmt.hu/api/publication/1044769}, author = {Fan, L T and Shafie, S and Bertók, Botond and Friedler, Ferenc and Lee, D Y and Seo, H and Park, S and Lee, S Y}, doi = {10.1080/02533839.2005.9671080}, journal-iso = {J CHIN INST ENG}, journal = {JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS}, volume = {28}, unique-id = {1044769}, issn = {0253-3839}, year = {2005}, eissn = {2158-7299}, pages = {1021-1037}, orcid-numbers = {Bertók, Botond/0000-0002-1297-9792} } @inproceedings{MTMT:1060511, title = {Super-structure Generation for Separation Network Synthesis Involving Different Separation Methods}, url = {https://m2.mtmt.hu/api/publication/1060511}, author = {Heckl, István and Kovács, Zoltán and Friedler, Ferenc and Fan, LT}, booktitle = {6th Italian Conference on Chemical and Process Engineering}, unique-id = {1060511}, year = {2003}, pages = {1209-1214} } @article{MTMT:1060508, title = {Systematic Generation of the Optimal and Alternative Flowsheets for Azeotropic Distillation Systems}, url = {https://m2.mtmt.hu/api/publication/1060508}, author = {Bertók, Botond and Friedler, Ferenc and Feng, G and Fan, L T}, doi = {10.1016/S1570-7946(01)80054-7}, journal-iso = {COMPAIDED CHEMI ENG}, journal = {COMPUTER-AIDED CHEMICAL ENGINEERING}, volume = {9}, unique-id = {1060508}, issn = {1570-7946}, year = {2001}, pages = {351-356}, orcid-numbers = {Bertók, Botond/0000-0002-1297-9792} } @article{MTMT:1049419, title = {Mechanisms of Ammonia-Synthesis Reaction Revisited with the Aid of a Novel Graph-Theoretic Method for Determining Candidate Mechanisms in Deriving the Rate Law of a Catalytic Reaction}, url = {https://m2.mtmt.hu/api/publication/1049419}, author = {Fan, L T and Bertók, Botond and Friedler, Ferenc and Shafie, S}, journal-iso = {HUNG J IND CHEM}, journal = {HUNGARIAN JOURNAL OF INDUSTRY AND CHEMISTRY}, volume = {29}, unique-id = {1049419}, issn = {0133-0276}, year = {2001}, eissn = {2450-5102}, pages = {71-80}, orcid-numbers = {Bertók, Botond/0000-0002-1297-9792} } @article{MTMT:1044831, title = {Integrated synthesis of process and heat exchanger networks: algorithmic approach}, url = {https://m2.mtmt.hu/api/publication/1044831}, author = {Nagy, A B and Adonyi, Róbert and Halász, László and Friedler, Ferenc and Fan, L T}, doi = {10.1016/S1359-4311(01)00033-3}, journal-iso = {APPL THERM ENG}, journal = {APPLIED THERMAL ENGINEERING}, volume = {21}, unique-id = {1044831}, issn = {1359-4311}, year = {2001}, eissn = {1873-5606}, pages = {1407-1427} } @article{MTMT:1044830, title = {Graph-theoretical identification of pathways for biochemical reactions}, url = {https://m2.mtmt.hu/api/publication/1044830}, author = {Seo, H and Lee, D Y and Park, S and Fan, L T and Shafie, S and Bertók, Botond and Friedler, Ferenc}, doi = {10.1023/A:1011913225764}, journal-iso = {BIOTECHNOL LETT}, journal = {BIOTECHNOLOGY LETTERS}, volume = {23}, unique-id = {1044830}, issn = {0141-5492}, year = {2001}, eissn = {1573-6776}, pages = {1551-1557}, orcid-numbers = {Bertók, Botond/0000-0002-1297-9792} } @article{MTMT:1774307, title = {Exact super-structure for the synthesis of separation-networks with multiple feed-streams and sharp separators}, url = {https://m2.mtmt.hu/api/publication/1774307}, author = {Kovács, Zoltán and Ercsey, Zsolt and Friedler, Ferenc and Fan, LT}, doi = {10.1016/S0098-1354(99)80238-5}, journal-iso = {COMPUT CHEM ENG}, journal = {COMPUTERS & CHEMICAL ENGINEERING}, volume = {23}, unique-id = {1774307}, issn = {0098-1354}, year = {1999}, eissn = {1873-4375}, pages = {S1007-S1010}, orcid-numbers = {Ercsey, Zsolt/0000-0002-7536-3688} } @article{MTMT:1044841, title = {A combinatorial approach for generating candidate molecules with desired properties based on group contribution}, url = {https://m2.mtmt.hu/api/publication/1044841}, author = {Friedler, Ferenc and Fan, L T and Kalotai, L and Dallos, András}, doi = {10.1016/S0098-1354(97)00253-6}, journal-iso = {COMPUT CHEM ENG}, journal = {COMPUTERS & CHEMICAL ENGINEERING}, volume = {22}, unique-id = {1044841}, issn = {0098-1354}, year = {1998}, eissn = {1873-4375}, pages = {809-817}, orcid-numbers = {Dallos, András/0000-0003-3557-3418} } @inbook{MTMT:1049662, title = {Combinatorially Accelerated Branch-and-Bound Method for Solving the MIP Model of Process Network Synthesis}, url = {https://m2.mtmt.hu/api/publication/1049662}, author = {Friedler, Ferenc and Varga, József and Feher, E and Fan, L T}, booktitle = {Nonconvex Optimization and Its Applications, State of the Art in Global Optimization, Computational Methods and Applications}, unique-id = {1049662}, year = {1996}, pages = {609-626} } @article{MTMT:1044845, title = {Decision-Mapping: A Tool for Consistent and Complete Decisions in Process Synthesis}, url = {https://m2.mtmt.hu/api/publication/1044845}, author = {Friedler, Ferenc and Varga, József and Fan, L T}, doi = {10.1016/0009-2509(95)00034-3}, journal-iso = {CHEM ENG SCI}, journal = {CHEMICAL ENGINEERING SCIENCE}, volume = {50}, unique-id = {1044845}, issn = {0009-2509}, year = {1995}, eissn = {1873-4405}, pages = {1755-1768} } @article{MTMT:1044846, title = {Graph-Theoretic Approach to Process Synthesis: Polynomial Algorithm for Maximal Structure Generation}, url = {https://m2.mtmt.hu/api/publication/1044846}, author = {Friedler, Ferenc and Tarján, Klára and Huang, Y W and Fan, L T}, doi = {10.1016/0098-1354(93)80074-W}, journal-iso = {COMPUT CHEM ENG}, journal = {COMPUTERS & CHEMICAL ENGINEERING}, volume = {17}, unique-id = {1044846}, issn = {0098-1354}, year = {1993}, eissn = {1873-4375}, pages = {929-942} } @article{MTMT:1044849, title = {Graph-Theoretic Approach to Process Synthesis: Axioms and Theorems}, url = {https://m2.mtmt.hu/api/publication/1044849}, author = {Friedler, Ferenc and Tarján, Klára and Huang, Y W and Fan, L T}, doi = {10.1016/0009-2509(92)80315-4}, journal-iso = {CHEM ENG SCI}, journal = {CHEMICAL ENGINEERING SCIENCE}, volume = {47}, unique-id = {1044849}, issn = {0009-2509}, year = {1992}, eissn = {1873-4405}, pages = {1973-1988} }