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Impact of a reduction in heating, cooling and electricity loads on the performance of a polygeneration district heating and cooling system based on waste gasification
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Kraft- och värmeteknologi. Instituto Superior Tecnico, Universidade de Lisboa, Lisboa, Portugal.
Instituto Superior Tecnico, Universidade de Lisboa, Lisboa, Portugal.
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Energi- och ugnsteknik.ORCID-id: 0000-0002-1837-5439
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Kraft- och värmeteknologi.ORCID-id: 0000-0002-3661-7016
2018 (engelsk)Inngår i: Energy Journal, ISSN 0195-6574, E-ISSN 1944-9089, Vol. 151, s. 594-604Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
2018. Vol. 151, s. 594-604
Emneord [en]
polygeneration, district heating and cooling, refuse derived fuel, municipal solid waste, gasification
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-226907DOI: 10.1016/j.energy.2018.03.078ISI: 000432509000051Scopus ID: 2-s2.0-85046033334OAI: oai:DiVA.org:kth-226907DiVA, id: diva2:1201943
Merknad

QC 20180504

Tilgjengelig fra: 2018-04-27 Laget: 2018-04-27 Sist oppdatert: 2018-06-13bibliografisk kontrollert
Inngår i avhandling
1. Polygeneration District Heating and Cooling Systems Based on Renewable Resources
Åpne denne publikasjonen i ny fane eller vindu >>Polygeneration District Heating and Cooling Systems Based on Renewable Resources
2018 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Traditional district heating (DH) and district heating and cooling (DHC) systems have to address two principal challenges: phase-out of fossil fuels in favor of renewables; and profit instability related to declines in heating and cooling demands along with electricity price fluctuations. These obstacles can be overcome at once through upgrading these systems to a polygeneration concept by means of a retrofitted air-steam gasifier and gas upgrading equipment, enabling the use of renewable feedstocks such as refuse derived fuel (RDF) and municipal solid waste (MSW). In particular, the polygeneration DHC system will be able to produce simultaneously heating, cooling, electricity and value-added products – char, syngas, synthetic natural gas (SNG) and hydrogen. This work investigates the retrofit of these DHC systems through a case study based on the existing Climaespaco facility, located in Lisboa, Portugal. Thermodynamic, exergy, economic, exergo-economic and environmental models were built in Engineering Equation Software (EES) and Matlab. Overall, both RDF and MSW were found to be technically feasible and economically viable for using as feedstocks in the polygeneration DHC system. SNG production integrated in the polygeneration DHC system through the air-steam gasification and gas upgrading equipment is judged to be practical and also boosts revenues. The highest energy efficiency is achieved for cases where char is the sole by-product. System efficiencies drop as other value-added products are included as system outputs, although the extent of the efficiency decline can be adjusted by regulating syngas and SNG production. The highest discounted net cash flows are found for the scenario where SNG, syngas and char are produced simultaneously. A payback period of 3 years was determined for this and the other cases. From the exergy and exergo-economic perspectives, the scenario of simultaneous char and syngas production is the most promising as the overall exergy efficiency has the highest value and product exergo-economic costs are the lowest. However, from the products diversity viewpoint, the simultaneous production of char, SNG, syngas and H2 is advantageous.

sted, utgiver, år, opplag, sider
Kungliga Tekniska högskolan, 2018. s. 128
Serie
TRITA-ITM-AVL ; 2018:15
Emneord
district heating and cooling systems, polygeneration, refuse derived fuel, municipal solid waste, gasification.
HSV kategori
Forskningsprogram
Energiteknik
Identifikatorer
urn:nbn:se:kth:diva-226929 (URN)978-91-7729-785-7 (ISBN)
Disputas
2018-05-21, Meeting Room (0.19), Informatics II Building, Instituto Superior Tecnico,Av. Rovisco Pais,1049-001, Lisboa, Portugal, 17:28 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2018-05-02 Laget: 2018-04-27 Sist oppdatert: 2018-05-02bibliografisk kontrollert

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