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Utilisation of waste heat from exhaust gases of drying process

Frontiers of Chemical Science and Engineering 2016年第1期10卷 131-138页

作者： Olga P. Arsenyeva Lidija Cucek Leonid L. Tovazhnyanskyy Petro O. Kapustenko Yana A. Savchenko Sergey K. Kusakov Oleksandr I. Matsegora National Technical University 'Kharkiv Polytechnic Institute' Kharkiv 61002 Ukraine Centre for Process Integration and Intensification-CPI2 Faculty of Information Technology University of Parmonia Egyetem utca 10 Veszprem Hungary AO SPIVDRUZHNIST-T LLC Kharkiv 61002 Ukraine

Nowadays a lot of low-grade heat is wasted from the industry through the off- and flue-gasses with different compositions. These gases provide the sensitive heat with utilisation potential and latent heat with the components for condensation. In this paper, process integration methodology has been applied to the partly condensed streams. A hot composite curve that represents the gas mixture cooling according to equation of state for real gases was drawn to account the gas-liquid equilibrium. According to the pinch analysis methodology, the pinch point was specified and optimal minimal temperature difference was determined. The location of the point where gas and liquid phases can be split for better recuperation of heat energy within heat exchangers is estimated using the developed methodology. The industrial case study of tobacco drying process off-gasses is analysed for heat recovery. The mathematical model was developed by using MathCad software to minimise the total annualised cost using compact plate heat exchangers for waste heat utilisation. The obtained payback period for the required investments is less than six months. The presented method was validated by comparison with industrial test data.

关键词： exhaust gas waste heat process integration plate heat exchanger

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PoPA - SHARPS: A new framework for cost-effective design of hybrid power systems 22

PoPA - SHARPS: A new framework for cost-effective design of ...

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22nd International Congress of Chemical and process Engineering, CHISA 2016 and 19th Conference on process integration, Modelling and Optimisation for Energy Saving and Pollution Reduction, PRES 2016

作者： Mohammad Rozali, N.E. Wan Alwi, S.R. Ho, W.S. Manan, Z.A. Klemeš, J.J. Department of Chemical Engineering Universiti Teknologi Petronas Bandar Seri Iskandar Perak32610 Malaysia Faculty of Chemical Engineering Universiti Teknologi Malaysia Johor Bahru81310 Malaysia Centre for Process Integration and Intensification-CPI2 Research Institute of Chemical and Process Engineering - MUKKI Faculty of Information Technology University of Pannonia Egyetem u. 10 VeszprémH-8200 Hungary

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Heat integration retrofit analysis --an oil refinery case study by Retrofit Tracing Grid Diagram

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Frontiers of Chemical Science and Engineering 2015年第2期9卷 163-182页

作者： Andreja NEMET Jiri Jaromir KLEMES Petar Sabev VARBANOV Valter MANTELLI Centre for Process Integration and Intensification CPI2 Faculty of Information Technology Egyetem utca 10 8200 Veszprem Hungary IPLOM SpA Via C. Navone 3B 16012 Busalla Genoa Italy

Heat integration has been established over the last decades as a proven chemical engineering methodol- ogy. Two design implementations are often used in the industry： grassroots and retrofit. Although various methods have been developed for retrofit, it still needs more development to ensure simultaneously thermodynamic feasibility and economic viability. In this paper, a novel graphical approach has been developed to facilitate the understanding of the current situation and scope of improvement. The Retrofit Tracing Grid Diagram presents all streams and heat exchangers in temperature scale and the heat exchangers are clearly separated from each other, enabling clear visualisation of the current state. The tool incorporates the previously developed Cross-Pinch Analysis as well as path approach for retrofit. Additionally, the non-vertical heat transfer can be evaluated. The application of the developed tool has been validated on an oil refinery case study. The applicability of the tool is evident as it can reveal additional options for modification that none of the previous methods considered.

关键词： Heat integration retrofit Pinch Analysis,thermodynamic approach oil refinery

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Object-oriented model and file format for heat exchanger network computations

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Chemical Engineering Transactions 2015年 45卷 319-324页

作者： Barna, Balázs Varbanov, Petar S. Klemeš, Jiří J. Yong, Jun Yow Centre for Process Integration and Intensification - CPI2 Faculty of IT University of Pannonia Egyetem u.10 Veszprém Hungary

ISBN: (纸本)9788895608365

There have been software packages available for designing, retrofitting and optimising Heat Exchanger Networks (HENs). From those only a handful is available without any charge. Most of them are offered commercially. For professional consultants and large industry such solutions are adequate. However, for researchers they are usually too complicated, not too flexible and expensive. Converting data manually and unifying them in MS-Excel has been practiced to remedy this, but it is time-consuming and leaves a room for errors and semantic mismatch. A step towards a solution of this problem can be an open data exchange file format, which correctly reflects the entities in the HEN domain. The goal of this contribution has been to develop an object oriented model and a prototype file storage format primarily for HEN related tasks. This file format should enable collaboration on simulation, optimisation and synthesis of HENs. It is based on mapping the relevant process units and stream types to object-oriented concepts. An XML-based file format has been derived from the class design to store the topology and relevant data. To test the object model and the file format, a prototype software application has been created. Copyright © 2015, AIDIC Servizi S.r.l.,.

关键词： Digital storage

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Spreading the message: P-graph enhancements: Implementations and applications

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Chemical Engineering Transactions 2015年 45卷 1333-1338页

作者： Klemeš, Jiří Jaromír Varbanov, Petar Sabev Centre of Process Integration and Intensification - CPI2 Faculty of IT University of Pannonia Egyetem u.10 Veszprém Hungary

ISBN: (纸本)9788895608365

P-graph is a combinatorial optimisation framework aimed at optimising process networks. It is particularly efficient in handling problems with high combinatorial complexity and it has shown great reduction in the computational burden related to that. The current contribution provides a critical review of the P-graph framework, its fundamentals, main application areas and influence on the scientific and engineering thoughts for solving complicated real-life problems. This is followed by an analysis of the achieved impact, results and limitations. Potential opportunities for future research, development and innovation, opened by the identified limitations, are then suggested and discussed. Copyright © 2015, AIDIC Servizi S.r.l.,.

关键词： Combinatorial optimization

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Matrix representation of the grid diagram for heat exchanger networks

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Chemical Engineering Transactions 2015年 45卷 103-108页

作者： Yong, Jun Yow Varbanov, Petar Sabev Klemeš, Jiříf Jaromír Centre for Process Integration and Intensification - CPI2 Faculty of Information Technology University of Pannonia Egyetem utca 10 Veszprém8200 Hungary

ISBN: (纸本)9788895608365

Heat Exchanger Networks (HENs) are commonly represented on grid diagrams (GD). However, the traditional GD has some drawbacks with regard to calculation and evaluation. In this paper a representation of HENs in the form of a matrix called HEN Steam Matrix (HENSM) is presented. This numerical way has some advantages over graphical representation. In HENSM the heat exchangers are arranged in orderly fashion making it easier for engineers during synthesis or retrofit analysis. HENSM is able to track temperature differences directly by numerical values. This reveals the process Pinch, Network Pinch and the other potential Pinches. The matrix can also serve as an input and output interface for software tools. A retrofit case study is demonstrating the matrix use. The amount of energy can be recovered with different heat paths from the same heater to various coolers and the capital and payback period are compared among the heat paths. Copyright © 2015, AIDIC Servizi S.r.l.,.

关键词： Investments

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Environmental footprint comparison amongst dairy, grain and meat products in California

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Chemical Engineering Transactions 2015年 43卷 109-114页

作者： Walmsley, Michael R.W. Liu, Xia Varbanov, Petar S. Klemeš, Jiří J. Energy Research Centre School of Engineering University of Waikato Hamilton New Zealand Centre for Process Integration and Intensification - CPI2 Faculty of IT University of Pannonia Veszprém Hungary

ISBN: (纸本)9788895608341

A more holistic environmental footprint assessment methodology is applied to the production of four different types of food products from the California Central Valley agricultural area. Resource and energy supply chains from farm to consumer are evaluated for two animal based food products (milk powder and ground beef) and two grain based products (fried rice and wheat bread). Intensive farming and irrigation practices are assumed to apply to the food production systems. The work supports previous studies that grain based food products meet human nutritional needs far more efficiently than animal based ones like meat and dairy. As fossil fuel energy resources, arable land and clean water for irrigation become less available due to resource depletion and competition from other activities, significant environmental footprint reduction is possible with a shift to a more grain based low environmental footprint diet. Copyright © 2015, AIDIC Servizi S.r.l.

关键词： Animals

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Professor Dr Jiří Jaromír Klemeš: Celebration of the Jubilee in science and engineering

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Chemical Engineering Transactions 2015年 45卷 1717-1722页

作者： Varbanov, Petar Sabev Lam, Hon Loong Nemet, Andreja Centre for Process Integration and Intensification - CPI2 MÜKKI FIT University of Pannonia Hungary University of Nottingham Malaysia Campus Centre of Excellence for Green Technologies Jalan Broga Semenyih Selangor43500 Malaysia

ISBN: (纸本)9788895608365

Following the spontaneous decision of the friends within the process integration community, the current Jubilee Part of the Chemical Engineering Transactions (CET) Vol. 45 has been created, to celebrate the scientific achievements and the personality of Professor Dr Jiří Jaromír Klemeš. Some of the authors have chosen to prepare scientific tributes and others have contributed personal congratulatory articles. As a result the current Jubilee Part is a multi-faceted presentation of all friends' perspectives. This Editorial article introduces the celebration contributions. They are organised in scientific and personal parts, where the scientific part has a number of topical sections related to process design, optimisation and sustainability. It is shown in the overview that the collaboration of the community established with the help of the PRES series of conferences founded by Professor Dr Jiří Jaromír Klemeš has been very useful and is very much needed in the future. Copyright © 2015, AIDIC Servizi S.r.l.,.

关键词： Chemical operations

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Export-import of virtual carbon emissions and water flows embodied in international trade

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Chemical Engineering Transactions 2015年 45卷 571-576页

作者： Liu, Xia Klemeš, Jiří J. Čuček, Lidija Varbanov, Petar S. Yang, Siyu Qian, Yu Centre for Process Integration and Intensification - CPI2 Faculty of Information Technology University of Pannonia Egyetem utca 10 Veszprém8200 Hungary School of Chemical Engineering South China University of Technology Guangzhou510640 China

ISBN: (纸本)9788895608365

In the globalised world the greenhouse gas emission and water consumption are becoming increasingly important indicators for policy and decision making. Development of footprint assessment techniques over the last decade has provided a set of tools for monitoring CO2 emissions and water flows in the world. An overview of the virtual CO2 and virtual water flow trends in the international trade based on consumption perspective is performed. Review of the recent literature indicates that: (1) There are significant CO2 gaps between producer?s and consumer?s emissions, and US and EU have high absolute net imports CO2 budget. (2) China is an exporting country and increasingly carries a load of CO2 emission and virtual water export that are triggered due to consumption in other importing countries. (3) By imported products that are produced with lower carbon emission intensity and less water consumption then in the domestic industry, international trade can reduce global environmental pressure. A future direction should be focused into two main areas: (1) To provide the self-sufficient regions based on more efficient processes by combining production of surrounding countries. (2) To develop the shared mechanism and market share of virtual carbon and virtual water between trading partners regionally and internationally. Copyright © 2015, AIDIC Servizi S.r.l.,.

关键词： International trade

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A procedure for the retrofitting of large-scale heat exchanger networks for fixed and flexible designs applied to existing refinery total site

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Chemical Engineering Transactions 2015年 45卷 109-114页

作者： Čuček, Lidija Mantelli, Valter Yong, Jun Yow Varbanov, Petar S. Klemeš, Jiří J. Kravanja, Zdravko Faculty of Chemistry and Chemical Engineering University of Maribor Smetanova ulica 17 Maribor2000 Slovenia 16012 Italy Centre for Process Integration and Intensification - CPI2 Faculty of Information Technology University of Pannonia Veszprém8200 Hungary

ISBN: (纸本)9788895608365

This contribution presents the application of a novel three-step procedure for the retrofitting of large-scale heat exchanger networks (HENs) under fixed and flexible designs of existing Total Sites (TS). The entire procedure for HEN retrofitting within the analysed industrial TS consists of three steps: i) targeting and identification of the potential for improvement;ii) identification and selection of feasible and profitable alternatives for modifications, and iii) performing detailed HEN retrofit designs on the reduced spaces of alternatives. The search for retrofit modifications was performed by the economic objective by considering trade-offs between investment cost (heat exchanger area and piping) and savings in energy cost. The first targeting and second pre-screening steps were performed using the software tool TransGen, and the third synthesis step using software tool HENSYN. The novel three-step procedure was applied on an existing refinery TS. Copyright © 2015, AIDIC Servizi S.r.l.,.

关键词： Retrofitting

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