Possibilities and Problems in Using Exergy Expressions in Process Integration

Chuan Wang
Swerea MEFOS, Luleå Sweden

Carl-Erik Grip
LTU (Luleå University of Technology) Division Energy Technology, Luleå, Sweden

Erik Elfgren
LTU (Luleå University of Technology) Division Energy Technology, Luleå, Sweden

Mats Söderström
LIU (Linköping University), Division Energy Systems, Linköping, Sweden

Patrik Thollander
LIU (Linköping University), Division Energy Systems, Linköping, Sweden

Thore Bernsson
Chalmers University of Technology, Division Heat and Power Technology, Gothenburg, Sweden

Anders Åsblad
CIT Industriell Energi, Gothenburg, Sweden

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110571605

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:17, s. 1605-1612

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Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


Industrial energy systems are complicated networks; where changes in one process influence its neighboring processes. Saving energy in one unit does not necessarily lead to energy savings for the total system. A study has been carried out on the possibility to use the exergy concept in the analysis of industrial energy systems. The exergy concept defines the quality of an amount of energy in relation to its surrounding; expressing the part that could be converted into work. The study consists of literature studies and general evaluations; an extensive case study and an interview study. In the latter it was found that non technical factors are major obstacles to the introduction of exergy.


Energy efficiency; Exergy; Process integration; User acceptance; Industrial energy system


[1] Linnhoff B. & Flower J.R.; “Synthesis of Heat exchanger Networks I. Systematic generation of energy optimal networks”; Aiche Journal 24 (4); 1978; pp. 633-64 doi: 10.1002/aic.690240411.

[2] G. Wall; "Exergy Flows in a Pulp and Paper Mill and in a Steel Plant and Rolling Mill"; The Fourth International Symposium on Second Law Analysis of Thermal Systems; Rome; 25-29 May; 1987; pp. 131-140; ASME.

[3] Nilsson K. and Söderström M.; “Optimising the operation Strategy of a pulp and paper mill using the MIND Method”; Energy; vol. 17 (10); 1992; pp. 945-953 doi: 10.1016/0360-5442(92)90043-Y.

[4] Grip C.-E. and Thorsell A.; “Swedish national research program for energy saving by means of process integration”; Scanmet II; 2nd International Conference on Process Development in Iron and Steelmaking; June 6-9; 2004; Luleå; Sweden

[5] Grip C.-E.; Söderström M.; Berntsson T.; “Process integration as a general tool for energy intensive process industry. Development and practical applications in Sweden”; SCANMET III (3rd International Conference on Process Development in Iron and Steelmaking); June 8-11; 2008; Luleå; Sweden

[6] Larsson M.; Doctoral thesis; Luleå University of Technology; 2004; No.:2004:63; ISSN: 1402-1544

[7] Larsson M.; Sandberg P.; Söderström M.; Vuorinen H.; “System gains from widening the system boundaries: analysis of the material and energy balance during renovation of a coke oven battery”; Int J Energy Res.; 2004; pp. 1051-1064 doi: 10.1002/er.1013.

[8] Larsson M.; Grip C.-E.; Ohlsson H.; Rutqvist S.; Wikström J.-O.; Ångström; S.; “Comprehensive study regarding greenhouse gas emission from iron ore based production at the integrated steel plant SSAB TUNNPLAT AB”; International journal of green energy. vol. 3; nr. 2; 2006; pp. 171-183 doi: 10.1080/01971520500544036.

[9] Wang C.; Doctoral thesis; Luleå University of Technology; 2007; No:2007:28; ISSN print):1402-1544

[10] Thollander P.; Trygg; L.; Svensson; I.-L.; ”Analyzing variables for district heating collaborations between energy utilities and industries”; Energy 35 (9); 2010; pp. 3649-3656 doi: 10.1016/j.energy.2010.05.009.

[11] Zetterberg L.; “Flows of Energy and Exergy in the Steelmaking process at SSAB Luleå”; Master Thesis SSAB and Chalmers; Gothenburg; 1989

[12] Verbova M.; “Energy and Exergy flows in Steelmaking Processes at SSAB Strip Products Division in Luleå”; Master Thesis SSAB and LTU; 2007:080

[13] Grip; C.; Dahl; J.; Söderström; M.; “Exergy as a means for process integration in integrated steel plants and process industry”. Stahl und Eisen; 129; 2009; pp. S2–S8

[14] Malmström; S.; “Efficient use of waste energy in the steel industry”; Luleå University of Technology; Master Thesis SSAB and LTU; 2009:110

[15] Elfgren E; Grip C; Wang C and Karlsson J. Possibility to combine exergy with other process integration methods for a steelmaking case. 13th Conference on Process Integration; Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES’10); 28 August – 1 September 2010; Prague; Czech Republic

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