This paper presents a novel MILP-based iteration method for intensifying heat transfer to improve energy recovery in heat exchange networks (HENs) with topology modifications. A new optimization framework has been proposed to deal with the nonlinear computational difficulties due to the combination of conventional HEN retrofit (topology modifications) with heat transfer intensification. An industrial scale case study is carried out to demonstrate the validity and soundness of the proposed approach.
Heat transfer enhancement is one of the most promising methods to optimize heat transfer equipment and to increase heat recovery in industrial processes. Plate Heat Exchanger (PHE) is one of established types of enhanced HEs. To estimate possible benefits of that kind of heat transfer enhancement, a mathematical model of PHE, which accounts for different plate types and corresponding corrugations geometry, is used. Based on this model the optimization algorithm was developed using MINLP method with inequality constraints. The objective function is the heat transfer area of PHE unit. The plate spacing, plate length, the corrugations inclination angle to plate's vertical axis and the ratio of corrugations’ pitch to its height are the optimized variables. The developed algorithm is implemented as DLL module, which can be used for multiple calculations when optimizing heat exchanger networks (HEN).
Improve the energy efficiency of process industry practices Sustainability in the Process Industry explains process integration and optimization and discusses applications for improving the energy and water efficiency of industrial as well as nonindustrial energy users. Approaches for adapting these methodologies to include the integration of waste and renewable energy sources are covered. This authoritative text contains eight industrial-based case studies and nine testing examples with developed solutions. Details on software tools are also included in this practical guide. Optimization goals and application areas within sustainable industrial process design and integration Formulating sustainable tasks as optimization problems Improving energy efficiency through process integration Heat exchange and heat recovery Water/mass integration Minimizing water use and efficient generation New, relevant process integration research results Process optimization frameworks, including mathematical programming and P-graph and S-graph frameworks Applications of process integration, modeling, and optimization software tools
Heat transfer enhancement is one of the most promising methods to optimize heat transfer equipment and to increase heat recovery in industrial processes. Plate Heat Exchanger (PHE) is one of established types of enhanced HEs. To estimate possible benefits of that kind of heat transfer enhancement, a mathematical model of PHE, which accounts for different plate types and corresponding corrugations geometry, is used. Based on this model the optimization algorithm was developed using MINLP method with inequality constraints. The objective function is the heat transfer area of PHE unit. The plate spacing, plate length, the corrugations inclination angle to plate's vertical axis and the ratio of corrugations’ pitch to its height are the optimized variables. The developed algorithm is implemented as DLL module, which can be used for multiple calculations when optimizing heat exchanger networks (HEN).
The system is becoming more and more powerful with every passing day and you are becoming weaker and older. What if I told you that there is a tool that will even the odds. This tool is a book. Yes, just a book but after reading this book you will gain understating of knowledge New World Order robbed you a long time ago. You will never feel lost and powerless ever again - that's my promise to you. CIA Earth Blood: Animal Liberation Front is a powerful documentary book based on true facts, top secrets documents, witness testimonies. This book is about loyalty and betrayal, end of the world and new hope, Animal and Human Liberation heroes and CIA cowards. This book will tell you about the battle of good and evil that started in 302 AD and culminated the 2010's. This book will rock your world and open your eyes. This book will give you the power kings and gods never dreamed about.
This book discusses mathematical models that are based on the concepts of classical equilibrium thermodynamics. They are intended for the analysis of possible results of diverse natural and production processes. Unlike the traditional models, these allow one to view the achievable set of partial equilibria with regards to constraints on kinetics, energy and mass exchange and to determine states of the studied systems of interest for the researcher. Application of the suggested models in chemical technology, energy and ecology is illustrated in the examples.
This paper presents a novel MILP-based iteration method for intensifying heat transfer to improve energy recovery in heat exchange networks (HENs) with topology modifications. A new optimization framework has been proposed to deal with the nonlinear computational difficulties due to the combination of conventional HEN retrofit (topology modifications) with heat transfer intensification. An industrial scale case study is carried out to demonstrate the validity and soundness of the proposed approach.
A top Russian interpreter, who spent 30 years on the front lines of diplomacy, offers excerpts from his journals--the result of his four years spent in the service of Mikhail Gorbachev--covering the pivotal period between 1987 and 1990, and including parts of Gorbachev's conversations with Reagan, Thatcher, and Bush, among others.
This book presents the genetic connections of metamorphism and geodynamics. It discusses the tectonic and magmatic processes as the reason of metamorphism, and the geological types of metamorphism, which define the features of Р-Т parameters and Р-Т-t paths. Three categories of metamorphism are distinguished depending on the heat flow rate: 1) at a geothermal gradient near to an average terrestrial ("normal") value; 2) at a heightened thermal gradient as the result of additional heat supply in the earth's crust by magmatic intrusions and diapirism of magma; 3) at a reduced thermal gradient during the collision of lithosphere plates and blocks of the earth's crust. The quantitative methods of description of metamorphism have been widely used in this book. The mathematical models of metamorphism have been studied in connection with magmatic intrusions, rifting process and magmatic diapirism. Mineral changes in the rocks controlled by variations of Р-Т of parameters, mass transfer and chemical reactions have also been characterized. The book proposes a quasi-stationary model of diffusion metasomatism with respect to the formation of zonal structures of minerals. The method of mineral thermobarometry for the conditions of unsteady equilibrium has been worked out; the quantitative analysis of mass transfer during metamorphic reactions in the rock matrix has been carried out, and the mobility of chemical elements at metamorphism has been estimated as well. The book is intended for specialists in the fields of petrology, mineralogy and geochemistry, and for students at the senior and graduate level.
This book deals with the chemistry of polymeric metal chelates. The main results and the production and chemical structure of polymers with chelate units as well as the specificity of metal complex binding of different structure are presented here. This book also reveals the transformations which components undergo in the course of chelation. Special attention is paid not only to synthetic but also to natural (including living) systems. The usage of polymeric metal chelates and their development are examined. The related research was performed for chelates with chain structure. This book is useful to researchers being active in synthesis and design of macromolecular metal chelates
This book, as the fourth volume, continues on ultra-high temperature materials with melting (sublimation or decomposition) points around or over 2500 °C. In this quality the book has over-branched cross-links with the sections and tables of the previous Volumes I-III. Similarly to Volumes I-III, the book includes a thorough treatment of the physical and chemical properties of ultra-high temperature materials, namely such as W semi- and monocarbides, and continues the description of refractory carbides, which was begun from Volume II of the series. The book will be of interest to researchers, engineers, postgraduate, graduate and undergraduate students alike. The readers are provided with the full qualitative and quantitative assessment, which is based on the latest updates in the field of fundamental physics and chemistry, nanotechnology, materials science, design and engineering.
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