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Practical Process Integration

IP.com Disclosure Number: IPCOM000217218D
Publication Date: 2012-May-04
Document File: 134 page(s) / 5M

Publishing Venue

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Abstract

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Page 01 of 134

I

Industrial Heat Pumpe And Efficient Energy Utilization in the Procese Industries

INDUSTRIAL HEAT PUMPS AND EFFICIENT ENERGY

UTILIZATION IN THE PROCESS INDUSTRIES

Section 3.1

PRACTICAL PROCESS INTEGRATION (PinchTechnology)

Authors: Su Ahmad, Ph.D, Aspen Technology, Inc.

(Cambridge,Ma.)

Stephen G. Hall, Ph.D, The M.W. Kellogg Company (Houston,Tx.)

Steve W. Morgan, The M.W. Kellogg Company (Houston,Tx.)

Stuart J. Parker, Ph.D, The M.W. Kellogg Company (Houston,Tx.)

Page 1


Page 02 of 134

I n d u s t r i a l Heat Pumps And E f f i c i e n t Energy U t i l i z a t i o n i n t h e Process I n d u s t r i e s

Table of Contents


3.1.1 Introduction


3.1.2 Basic Algorithms and Tools


3.1.2.1


3.1.2.2


3.1.2.3


3.1.2.4


3.1.2.5


3.1.2.6


3.1.2.7


3.1.2.8


3.1.2.9

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Data Extraction I
Composite Curves and Energy Targeting Problem TableAlgorithm
Multiple Utilities Targeting
Area Targets
Number-of-Units Target
Optimizationof Minimum Approach Temperature Heat Exchanger Network Design
Review of Basic Algorithms and Tools


3.1.3 Making Use of Pinch;A Practical Example


3.1.3.1 ProcessDescription


3.1.3.2 Data Extraction I1


3.1.3.3 Energy Targeting and Capital/Energy Trade-off


3.1.3.4 Appropriate Placement/ProcessModification


3.1.3.5 Network Design


3.1.3.6 Design Evolution, 'Loops and Paths'


3.1.3.7 Discussionand Conclusion


3.1.4. Advanced Applications


3.1.4.1 Exergy Analysis


3.1.4.2 Retrofit of Heat Exchanger Networks

3.1.4.3 Targeting and Design For Constrained (Forbidden)Matches


3.1.4.4 Total SiteAnalysis


3.1.5 Summary


3.1.6 References


Page 03 of 134

Industrial Heat Pumps And Efficient Energy Utilization in t h e Proceee Industries


3.1.1 INTRODUCTION

Pinch Technology is a methodology, comprising a set of structured techniques, for the systematic application of the first and second laws of thermodynamics. The application of these techniques enables process design engineers to gain fundamental insight into the thermal interactions between chemicalprocesses andtheutility systemsthatsurroundthem. Havingsuchknowledgeenablestheengineer tooptimizeoverall utility consumption and set process and utility system configurations prior to final detailed simulation and optimization. Thesetechniques are both simpleand practical. This chapter illustrates how the application of Pinch Technology can provide the design engineer with the insight and understanding needed to evaluate complete process system designs.

Processheatand power integrationhasasignificantimpacton theoverallprocessdesign. Therefore,itcannotbeconsidered in isolation. Itmustbe consideredas anintegralpart ofthe system designor "synthesis".Many decompositionschemes have been proposed that break down the design of chemical process systemsintosubsystems,promotinga systematicandstructured approach to synthesis.

One suchdecomposition, schematically representedby Linnhoff in the "onion diagram''(1), Figure 3.1.1, breaks the total process system intofoursubsystems :thereaction system,the separationsystem,the heatexc...