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Journal Article

Using pinch technology for process retrofit

01 Jan 1986-Chemical Engineering (CHEMICAL ENGINEERING)-Vol. 93, Iss: 8, pp 47-47
TL;DR: Methode simple, pratique et rapide de readaptation d'une unite as discussed by the authors is used for distillation de petrole brut (on a considere douze scenarios possibles)
Abstract: Methode simple, pratique et rapide de readaptation d'une unite. Exemple d'application a une unite de distillation de petrole brut (on a considere douze scenarios possibles)
Citations
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Journal ArticleDOI
TL;DR: A critical review of the literature on heat-exchanger network synthesis, the most commonly studied problem in process synthesis, and several classification schemes of this body of work based on a number of modeling and algorithmic criteria are presented.
Abstract: This paper provides a critical review of the literature on heat-exchanger network synthesis, the most commonly studied problem in process synthesis. After a review of solution methods, we present the chronological milestones in the development of the field and we discuss separately each of 461 related works leading up to the turn of the century. Then, we present several classification schemes of this body of work based on a number of modeling and algorithmic criteria. Finally, we offer a critical assessment of the current status of research in this area and provide suggestions for future research.

428 citations

Journal ArticleDOI
T. Gundepsen1, L. Naess1
TL;DR: The industrial heat exchanger network synthesis (HENS) problem is very complex and involves combinatorial problems in the "matching" between hot and cold streams to enhance heat recovery, temperature dependent physical and transport properties, the choice of flow configuration and materials of construction for the heat exchangers, the combination of hard and soft problem data (some target temperatures must be met, while others may be varied within limits if this is of advantage for the total process economy), various kinds of constraints (forbidden and compulsory matches) and different types of streams (liquid, vapour and

302 citations

Journal ArticleDOI
TL;DR: A review of the most significant implementations of the Pinch analysis can be found in this article, where the authors identify and substantiate future directions of research for Pinch Methodology applications.
Abstract: The emergence of Pinch Analysis from more than four decades ago opened a new area of intense research development that has even accelerated in recent years. Initially, Pinch Analysis (PA) provided a systematic thermodynamic-based approach to address the need for large energy savings around the 1970s oil crises. Since inception, the Pinch Methodology (PM) has flourished considerably, finding meaningful application to a wide range of industrial, regional, and global challenges well beyond heat – it’s most well-known and first application. This review represents an attempt to identify and substantiate future directions of research for the most significant implementations of Pinch Methodology. Reported applications in the literature range from Heat Integration, Total Site and Water Integration through to Emergy and even Financial Investment Planning; cutting across multiple engineering fields – Mechanical, Chemical, Process, Power, and Environmental Engineering – as well as entering the research domains of Management and Finance. Key findings of this review include: (1) the need for more awareness within the engineering and science research communities of the latest and continuing developments of the Pinch Methodology; (2) a need for complete tool sets covering targeting through to engineering design for many of the Pinch Methodology applications; and, (3) the full benefits of Pinch Methodology can only be achieved in developing design solutions with an appreciation for the most recent developments.

235 citations

Journal ArticleDOI
TL;DR: A comprehensive review the development through the years (1975–2008) of the heat integration and heat exchanger network synthesis (HENS) as a technique of process integration.

153 citations

Journal ArticleDOI
TL;DR: In this article, the authors combine mathematical optimization techniques with a better understanding of the retrofit problem, based on thermodynamic analysis and practical engineering, to produce a systematic procedure capable of efficiently solving industrial size retrofit problems.
Abstract: This paper combines mathematical optimization techniques with a better understanding of the retrofit problem, based on thermodynamic analysis and practical engineering, to produce a systematic procedure capable of efficiently solving industrial size retrofit problems. The major characteristic of the approach presented is that it offers a systematic and automatic method for the retrofit design of heat exchanger networks (HENs), combined with a facility for meaningful user interaction. The new procedure employs a two-stage approach for retrofit HEN design: The first stage is the diagnosis stage, during which a minimum number of promising HEN topology modi-fications is obtained which enables a desired heat recovery target to be achieved. In the second stage, the optimization stage, the HEN obtained after implementation of the modi-fications is optimized using non-linear optimization techniques to minimize the cost of additional surface area employed. It has been observed that heat recovery in a HEN is thermodynamically limited by certain exchanger matches unavoidably tending to a zero degree temperature approach as the heat recovery increases. These exchanger matches, which are termed as pinching matches, act as a bottleneck to heat recovery in the HEN. To increase the potential for heat recovery beyond the limits caused by the pinching matches, the network topology must be altered by repiping of exchangers, addition of new exchanger matches or creation of stream splits. Based on the above observation, the diagnosis stage is made up of two steps. In the first step the HEN bottleneck is identified, and in the second step a mixed integer linear programming (MILP) formulation is used to select a single modification which will best overcome the identified bottleneck. These two steps are repeated in a loop to yield the required set of promising topology modifications.

148 citations