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Optimising the operation of a district heating system
RISE, Swerea, Swerea MEFOS.
RISE, Swerea, Swerea MEFOS.
LuleKraft AB.
Luleå Energi AB.
2013 (English)In: Chemical Engineering Transactions, Italian Association of Chemical Engineering - AIDIC , 2013, Vol. 35, p. 637-642Conference paper, Published paper (Refereed)
Abstract [en]

A system with several actors will increase the possibilities for collaboration and therefore, in many cases also increase the possibilities to affect the operation with economic and environmental benefits. In this paper a district heating system is studied with purpose to create economic and environmental operation guidelines in favour of the involved actors. The company LuleKraft owns a combined heat and power plant, while the four heating stations together with the DH network are owned by Luleå Energi. District heat is produced from the CHP plant and the four heating stations which are fired with process gases from an integrated steel plant, oil, wood pellets or electricity. The heat demand in the system is strongly depending on the outdoor temperature. In this paper, the system is modelled with Mixed Integer Non Linear Programming in order to optimise the profit and CO2 emission. A comparison between actual process data and modelled results is performed. A pareto front is derived to show the trade-off between economic benefits and CO2 emissions. It is found that the main suggestions, under conditions for optimised profit, are (1) to prioritize effective heat production instead of electricity production at cold outdoor temperatures and (2) redistribution of the accessible process gases between the CHP plant and one of the heating stations. This will lead to an improved operation strategy, resulting in increased profit and reduced energy consumption. Copyright © 2013, AIDIC Servizi S.r.l.

Place, publisher, year, edition, pages
Italian Association of Chemical Engineering - AIDIC , 2013. Vol. 35, p. 637-642
Series
Chemical Engineering Transactions, ISSN 1974-9791
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-13461DOI: 10.3303/CET1335106Scopus ID: 2-s2.0-84886435470OAI: oai:DiVA.org:ri-13461DiVA, id: diva2:973670
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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