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| MECA0046-2 | Heat exchangers, Heat exchangers networks and rational use of energy
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| Duration : | 15h Th, 15h Pr |
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| Credits/ECTS : |
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| Holder(s) : | Georges Heyen |
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| Language : | Langue française |
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| Course contents : | The first part of the course deals with exergy analysis and its application to various mechanisms of heat transfer.
The second section of the course addresses the analysis of energy supply and demand for chemical processes, and its representation in the form of composite curves.
This leads to a third chapter, where the pinch design method for heat exchanger networks is developed.
Finally we discuss the selection of utilities and energy carriers and their integration in a site wide energy system. |
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| Course objective : | This course aims to develop skills in performance analysis of heat exchanger networks, as well as in sysnthesis and design of energy systems.
After completing the course, a student should be able to evaluate the exergetic afficiency of a system involving thermal engines, chemical reactors (e.g. combustion chambers) and heat exchangers.
Based on the efficiency of all unit operations, he should be able to troubleshoot a design and identify components which should be retrofitted in order to increase the overall efficiency of the process.
The student shoul also be able to draw composite curves to represent the energy supply and demand of a process, and to interpret them. He should be able to identify on that basis the expected efficiency of several energy saving technologies : combustion air preheat , oxygen enrichment, limitation of excess air, change of pressure level in condensers and boilers, selection of heat pumps or alternate recfrigeration cycles, integration of heat and power cycles.
Finally, starting with composite curves, he should be able to design an efficient heat exchanger network (matching streams that have to exchange heat, and deciding the amount of heat transfer), the goal being to maximize the energy recovery and to reduce the energy requirement of a process. |
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| Prerequisites : | Introduction to applied thermodynamics
Basic notions about heat exchangers, combustion, engine cycles and refrigeration |
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| Workshops : | Two individual assignments :
- evaluation of the exergy efficiency of a process, knowing the flowsheet and stream properties
- design of a heat exchanger network allowing to maximize the energy recovery of a process, knowing its energy requirement (power required and temperature level) |
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| Organization : | 5 x 3 hrs courses
2 individual applications, graded on the basis of a written report. |
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| Written notes : | Course notes available for photocopy
Copy of all presentations
Some concepts are illustrated by spreadsheets available on the department intranet. |
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| Assessment : | Grade of 2 written reports
Oral examination (after written preparation) |
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| Contacts : | Georges Heyen
Institut de Chimie B6, room R68
Phone : 04 366 3521
FAX : 04 366 3525
Email : G.Heyen@ulg.ac.be |
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| Remarks : | see also :
http://www.lassc.ulg.ac.be/webCheng00/MECA046/index.htm |
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