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Investigating influential techno-economic factors for combined heat and power production using optimization and metamodeling
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Energisystem.ORCID-id: 0000-0001-5574-8372
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Energisystem.ORCID-id: 0000-0003-3472-4210
2018 (engelsk)Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 232, s. 555-571Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper investigates the interaction of a wide range of electricity and fuel prices and technical factors of combined heat and power production in a district heating system. A linear programming-based optimization model with the objective to minimize system cost was used to study the energy systems in the cities of Gävle and Sandviken in Sweden. The comprehensive outcomes from optimization and parametric studies have been analyzed using a polynomial-based metamodel. System costs include variable costs for the production and revenues for sale of heat and electricity. The metamodel is used as an analytical and explanatory tool to interpret input-output relationships. Municipal district heating systems of Gävle and Sandviken in Sweden are studied as an interconnected regional system with improved and new combined heat and power plants. The results show that effects from electricity and fuel prices are important, but that variations in energy system cost may also be caused by many cross-factor interactions with technical factors. A comparative system performance analysis with defined cases and optimal factor setting shows a substantial increase in the electricity production, here by up to 650 GWh annually. The profitability of investing in a new plant depends highly on the considered investment risk and electricity and fuel market prices. CO2 emission savings by up to 466 kton annually can be accomplished if marginal electricity production from coal-condensing power plants is avoided and biofuel is released at the same time.

sted, utgiver, år, opplag, sider
Elsevier, 2018. Vol. 232, s. 555-571
Emneord [en]
Metamodel; Optimization; Energy system cost; Sensitivity analysis; Cogeneration; District heating
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-28141DOI: 10.1016/j.apenergy.2018.09.206ISI: 000451356200040Scopus ID: 2-s2.0-85054461705OAI: oai:DiVA.org:hig-28141DiVA, id: diva2:1254699
Tilgjengelig fra: 2018-10-10 Laget: 2018-10-10 Sist oppdatert: 2019-01-07bibliografisk kontrollert

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