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About 10,000 papers for “Process Optimization and Integration”

Resource conservation and optimization via process integration

F. Gabriel · OakTrust (Texas A&M University Libraries) · 2006

The process industries are characterized by the enormous use of natural resources\nsuch as raw materials, solvents, water, and utilities. Additionally, significant amounts of\nwastes are discharged from industrial facilities. As the world moves toward sustainable\nprogress, that is, meeting the demand of the current generation without affecting or\ncompromising the new generation, future process facilities must focus on resource\nconservation and pollution prevention. The purpose of this work is to introduce a new\nprocess integration methodology for the conservation and optimization of resources in\nthe process industries. The work is also geared towards reducing waste discharge from\nthe processing facilities. The optimal management of fresh resources and waste disposal\nrequires the appropriate allocation, generation, and separation of streams and species.\nMaterial recycle/reuse/substitution, reaction alteration, and process modification are\nsome of the main strategies employed to conserve resources in the process industries.\nThe overall problem addressed in this dissertation can be stated as follows: Given\nis a process with a number of streams (sources) that are characterized by certain criteria\n(e.g., compositions of certain compounds, targeted properties) where these streams can\nbe utilized in a number of process units (sinks) if they satisfy given constraints on flow\nrate, compositions, and/or properties. Additionally, interception devices may be used to\nadjust stream criteria. The objective is to develop targeting procedures and synthesis\ntools for the identification of minimum usage of fresh resources, minimum discharge of\nwaste, and maximum integration of process resources. The devised methodology\naddresses four classes of problems:\n• Targeting techniques using direct recycle strategies\n• Recycle and interception procedures for single-component systems\n• Recycle and interception procedures for multi-component systems\n• Property integration for direct recycle strategies\nThe framework provided by this dissertation couples traditional mass integration\nwith groundbreaking property integration techniques to target, synthesize and optimize a\nplant for maximal conservation of resources. In particular, this work introduces new\ntechniques such as material recycle pinch analysis, simultaneous recycle and interception\nnetworks, and property-based allocation. Additionally, graphical, algebraic, and\noptimization approaches are developed and validated with case studies in order to\nillustrate the applicability of the devised procedures.

Cited by 0

Simultaneous optimization and heat integration with process simulator

Lang, Y-D, Biegler, Lorenz T., Grossmann, Ignacio E. et al. · KiltHub Repository · 2018

Abstract: "Strategies are presented for performing maximum heat integration of process streams simultaneously with flowsheet optimization in sequential process simulators. The strategies have been implemented on FLOWTRAN, using infeasible path optimization methods. Two formulations for performing the heat integration are compared in terms of reliability and computational efficiency. Results on complex process flowsheets show that this approach can produce substantial savings in raw material consumption through more efficient energy integration. Moreover, based on a simplified model, it is proved that these savings can always be achieved in recycle processes."

Cited by 0Open access

Simultaneous optimization and heat integration with process simulator

Lang, Y-D, Biegler, Lorenz T., Grossmann, Ignacio E. et al. · KiltHub Repository · 2018

Abstract: "Strategies are presented for performing maximum heat integration of process streams simultaneously with flowsheet optimization in sequential process simulators. The strategies have been implemented on FLOWTRAN, using infeasible path optimization methods. Two formulations for performing the heat integration are compared in terms of reliability and computational efficiency. Results on complex process flowsheets show that this approach can produce substantial savings in raw material consumption through more efficient energy integration. Moreover, based on a simplified model, it is proved that these savings can always be achieved in recycle processes."

Cited by 0Open access

Process optimization through integration of control and asset management

Oludele Abiodun Akintunde · Boloka Institutional Repository (North-west University) · 2007

BACKGROUNDGenerally, plant equipment (whether electrical, mechanical, process or instruments) are one of the major assets of any process industry.Processes do not operate in isolation; the different pieces of equipment make them happen.The greatest investment in any plant is, arguably, on equipment.It is therefore logical and reasonable to give the greatest attention possible to the health and integrity of equipment that make up a process plant.Equipment failure can have serious consequences, even to the extent of plant shutdown, with all the losses that go with this.One major consequence of equipment malfunction is sub-optimal plant operation.A huge amount of money could be lost due to unforeseen equipment failure.A new technology is emerging whereby imminent equipment failure can be detected.Corrective actions can thus be implemented before failure occurs.The success of this technology lies in the fact that it integrates the plant control with asset management functions.This integration is not possible in orthodox valves and instrumentation because they are not intelligent, thus limiting their usefulness in ICAM implementation.By integrating asset management functionalities with the control system, effective tracking and management of the health of field and process-based assets, and control loops can be achieved.This is because valuable data that could be used to assess the health condition of an asset and spot potential problems is imbedded in control equipment such as remote terminal units (RTUs), programmable logic controllers (PLCs), supervisory control and data acquisition (SCADA) systems and distributed control system (DCS).Besides, valuable data also resides in manually maintained Excel spreadsheets, paper reports, or applications that require manual entry.

Cited by 0Open access

Integration and optimization of assisting forming process with vibrations

KHAN, Armaghan, BIGOT, Régis, GIRAUD-AUDINE, Christophe et al. · theses.fr (ABES) · 2013

Le travail présenté intègre l'utilisation des vibrations mécaniques dans les procédés de mise en forme à froid des matériaux de comportement viscoplastique. Les avantages de procédé de mise en forme assisté par vibrations se mesurent par une réduction de l'intensité de la force de mise en forme, une diminution de la contrainte d'écoulement, la réduction du frottement entre l'outil et lopin, une distribution uniforme de la déformation viscoplastique et une amélioration de l'état de surface de la pièce finale. A cet effet, un modèle analytique avec une seule source de vibration a été développé pour le procédé de forgeage. Les vibrations sinusoïdale et triangulaire ont été intégrées dans le modèle et il se trouve que les vibrations triangulaire est plus avantageux comparer à les vibrations sinusoïdal a cause du contrôle sur le rapport cyclique. On observe également que les paramètres principaux qui contrôlent la réduction de la force de forgeage sont : le rapport de vitesse définie par l'amplitude de la vitesse de vibration et la vitesse moyenne de l'outillage et la sensibilité à la vitesse de déformation. Le modèle analytique a été validé au moyen des simulations éléments finis réalisés avec le code de calcul FORGE2011 ® et les essais expérimentaux en dispositif expérimentale de pot vibrant a été conçu et les essais ont été réalisé sur les machines Lloyd LR30K ou ZWICK / Roell 1200. L'étude a ensuite été enrichi avec les plusieurs sources de vibrations. L'étude cinématique montre que les vibrations multiples générés une onde progressive. Cette nouvelle cinématique a été intégrée dans un modèle numérique sur le code de simulation par éléments finis FORGE2011 ® pour étudier le forgeage assisté par plusieurs sources des vibrations. L'analyse de résultats montre une réduction considérable de la force de forgeage et de la contrainte de l'écoulement ainsi qu'une modification de la loi de frottement générer par le changement de la direction du vecteur de vitesse.

Cited by 0Open access

Concept for process integration and process optimization for a hair colour producer

Julia Rietz · LIBDOC - Westsächsische Hochschule Zwickau · 2013

Die Verlagerung eines kompletten Fertigungsbereiches zwischen zwei Produktionsstandorten zieht eine Vielzahl von Veränderungen nach sich. Gegenstand der vorliegenden Diplomarbeit ist die Befassung mit diesem Projekt der Verlagerung und die Auswirkungen auf den zukünftigen Produktionsstandort des Fertigungsbereiches. Untersucht wurde dabei die Ausgangssituation des gegenwärtigen als auch zukünftigen Standortes des betroffenen Produktionsbereiches inklusive aller beteiligten Prozesse und des Produktionsprogramms. Auf der Basis dieser Auswertung wurde deutlich, dass eine Bearbeitung des zukünftigen, signifikant höherem Produktionsvolumen mit den bestehenden Prozessen zwar möglich ist, jedoch keinesfalls unter optimalem Ressourceneinsatz erfolgen kann. Um diesem entgegenzuwirken wurden verschiedene Varianten neu gestalteter Prozesse entwickelt. Ergebnis dieser Arbeit ist eine Optimierung eines bestehenden und die Integration eines neuartigen Prozesses für die Bearbeitung des verlagerten Fertigungsbereiches. Die Neugestaltung der Prozesse fand dabei unter Beachtung des optimalen Ressourceneinsatzes und die Entscheidung für eine Variante auf der Grundlage minimaler Prozessdauer und eines minimalen Personalbedarfs statt.

Cited by 0

Process Optimization and Integration Strategies for Material Reclamation and Recovery

Houssein Kheireddine · OakTrust (Texas A&M University Libraries) · 2012

Industrial facilities are characterized by the significant usage of natural resources and the massive discharge of waste materials. An effective strategy towards the sustainability of industrial processes is the conservation of natural resources through waste reclamation and recycles. Because of the numerous number of design alternatives, systematic procedures must be developed for the effective synthesis and screening of reclamation and recycle options. The objective of this work is to develop systematic and generally applicable procedures for the synthesis, design, and optimization of resource conservation networks. Focus is given to two important applications: material utilities (with water as an example) and spent products (with lube oil as an example). Traditionally, most of the previous research efforts in the area of designing direct-recycle water networks have considered the chemical composition as the basis for process constraints. However, there are many design problems that are not component-based; instead, they are property-based (e.g., pH, density, viscosity, chemical oxygen demand (COD), basic oxygen demand (BOD), toxicity). Additionally, thermal constraints (e.g., stream temperature) may be required to identify acceptable recycles. In this work, a novel approach is introduced to design material-utility (e.g., water) recycle networks that allows the simultaneous consideration of mass, thermal, and property constraints. Furthermore, the devised approach accounts for the heat of mixing and for the interdependence of properties. An optimization formulation is developed to embed all potential configurations of interest and to model the mass, thermal, and property characteristics of the targeted streams and units. Solution strategies are developed to identify stream allocation and targets for minimum fresh usage and waste discharge. A case study on water management is solved to illustrate the concept of the proposed approach and its computational aspects. \n\nNext, a systematic approach is developed for the selection of solvents, solvent blends, and system design in in extraction-based reclamation processes of spent lube oil Property-integration tools are employed for the systematic screening of solvents and solvent blends. The proposed approach identifies the main physical properties that influence solvent(s) performance in extracting additives and contaminants from used lubricating oils (i.e. solubility parameter (delta), viscosity (v), and vapor pressure (p)). The results of the theoretical approach are validated through comparison with experimental data for single solvents and for solvent blends. Next, an optimization formulation is developed and solved to identify system design and extraction solvent(s) by including techno-economic criteria. Two case studies are solved for identification of feasible blends and for the cost optimization of the system.

Cited by 0

Process Integration and Optimization for Sustainable and Circular Hydrogen Production

M Lim Moy Hian, Chun Hsion Lim, Bing Shen How et al. · IOP Conference Series Materials Science and Engineering · 2022

Abstract With omnipresent issues concerning environmental degradation following the extensive use of fossil fuels, there is an urgent need to move towards more sustainable fuels such as hydrogen, which produces only water as by-product upon combustion. However, hydrogen production processes have limitations in terms of raw materials, process parameters and energy input which affects the sustainability of the product. As hydrogen demand is forecasted to increase, process optimization studies are favourable due to limited current work on this topic. In this paper, six hydrogen production processes are integrated into a superstructure with special consideration given to implementation of circular economies. Mathematical modelling of the superstructure then allows optimization of three case studies based on economic and environmental performance. This study shows the possibility of achieving zero net CO 2 emissions through water electrolysis, provided that electricity generated with the produced hydrogen is used to power the plant. Gross profits of 1489.14 RM/hr and 4075.60 RM/hr show the potential of Palm Oil Biomass as feedstock. Overall, implementation of circular economy was found favourable to achieve sustainable production. This framework created has the potential to act as decision- making tool for policy makers to assist them in determining optimum hydrogen production pathways.

Cited by 6Open access

MULTIDISCIPLINARY PROCESS INTEGRATION AND DESIGN OPTIMIZATION OF A CLASSROOM BUILDING

Bjork B-c, Forest Flager, M. Eng et al. · 2012

SUMMARY: Architecture, Engineering, and Construction (AEC) professionals typically generate and analyze very few design alternatives during the conceptual stage of a project. One primary cause is limitations in the processes and software tools used by the AEC industry. The aerospace industry has overcome similar limitations by using Process Integration and Design Optimization (PIDO) software to support Multidisciplinary Design Optimization (MDO), resulting in a significant reduction to design cycle time as well as improved product performance. This paper describes a test application of PIDO to an AEC case study: the MDO of a classroom building for structural and energy performance. We demonstrate how PIDO can enable orders of magnitude improvement in the number of design cycles typically achieved in practice, and assess PIDO’s potential to improve AEC MDO processes and products.

Cited by 0

Polymer Process Optimization Center: Integration of NSF and Industrial Support

Sullivan, Laura L., Li, Gwen Ywan · Kettering University Digital Commons (Kettering University) · 1998

A $100K donation from local industry for a Polymer Process Optimization Center has been awarded to the Kettering University. With the creation of this Center, all phases of thermoplastic component manufacturing via injection molding will be integrated, from materials selection to tool design to process optimization. Undergraduate students will access this facility (1) as a freshman, in one week study of polymer processing within a survey Introduction to Manufacturing Processes course (IMSE 101), (2) in an upper division Polymer Processing course (IMSE 407), and (3) via independent study projects in the area of injection molding for senior level students.

Cited by 0

Water and wastewater optimization through process integration for industrial processes

R. Parand · eSpace (Curtin University) · 2014

Water management has become a very vital issue for process engineers because of the stringent environmental regulation. A systematic study of water saving opportunities in process industries is conducted in this research using process integration approach (specifically water pinch analysis as a tool). Within this work, reuse/recycle and regeneration-reuse/recycle schemes are considered. Moreover, a special attention is given to the threshold problems. To facilitate these studies, MATLAB has been employed as a programming tool.

Cited by 2Open access

Comparing Learning Strategies in Understanding Process Integration, Optimization and Sustainability

Rochelle Irene G. Lucas, Kathleen B. Aviso, Michael Angelo B. Promentilla et al. · SHILAP Revista de lepidopterología · 2019

Process Integration provides an excellent engineering toolbox for optimising industrial systems to achieve sustainability gains. However, effective large-scale use of such tools depends on effective education of new generations of engineers with the correct training and mind-set. Learning strategies refer to the different combinations of activities the learners utilise in their process of learning. Chemical engineering students often face the challenges in processing key concepts integral in the understanding of Process Integration, optimisation and sustainability. A preliminary survey of students from the undergraduate program from the Philippines identifies learning strategies they employ in better understanding Process Integration, optimisation and sustainability. These strategies help learners in analysing concepts, monitoring the learning process, linking concepts with one another, inferring meanings from context, and managing their behaviour towards learning. Educational best practices are suggested based on insights drawn from the responses.

Cited by 0Open access