Thermal Process Engineering
Energy optimization of industrial sites
Ala Modarresi
Anton Friedl
amodarre@mail.zserv.tuwien.ac.at
Achema 2012
Institute of Chemical Engineering
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Thermal Process Engineering
Energy optimization of industrial sites
 Data extraction and analysis
 Heat Exchanger Network (HEN) optimization

HEN synthesis software „TVTHENS“ for industrial-scale problems*
 New process technologies

Absorption chillers/heat pumps simulation with „TRNSYS“
 Renewable energy systems

Geothermal/solar thermal systems simulation with „TRNSYS“
[*] A. Modarresi, A. Miltner, A. Friedl, M. Wiesinger, BESTENS AUSGENUTZT, Chemie Technik, 04 (2011), pp. 64-66
Achema 2012
Institute of Chemical Engineering
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Thermal Process Engineering
Energy optimization of industrial sites
 Heat exchanger network optimization
• Pinch analysis
• Grand and Composite curves
• Exergy block diagram
• Maximum heat integration and minimum
Utilities demand
• Targeting
• Minimization of the Utilities demand
• Heat load distribution
• Minimization of the number of heat
exchangers
• HEN Optimization
• Simultaneous minimization of the Utilities demand and number of heat exchangers
as well as minimization of overall heat exchange area
• Retrofit
[*] A. Modarresi, P. Kravanja, A. Friedl, Pinch and exergy analysis of lignocellulosic ethanol, biomethane, heat and power
production from straw, Applied Thermal Engineering, 2012, http://dx.doi.org/10.1016/j.applthermaleng.2012.01.026
Achema 2012
Institute of Chemical Engineering
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Thermal Process Engineering
Energy optimization of industrial sites
Prepared data
Pinch analysis
Mixed Integer Linear Program
Extracted data
Heat exch. network
Achema 2012
Institute of Chemical Engineering
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Thermal Process Engineering
Energy optimization of industrial sites
 New process technologies and renewable energy systems

Simulation of geothermal/solar thermal assisted absorption chillers/heat pumps
Achema 2012
Institute of Chemical Engineering
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Thermal Process Engineering
Energy optimization of industrial sites
Solar thermal energy
Simulation
Heat pump
Absorption Chiller
Geothermal energy
Acknowledgements
The project is supported by the “Klima- und Energiefonds“(NEUE ENERGIEN 2020)
and the “FFG“ as well as by the „Lenzing Fibers GmbH“.
www.klimafonds.gv.at
Achema 2012
Institute of Chemical Engineering
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