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Ny teknik för småskalig kraftvärme: - med fokus på Organisk RankineCykel (ORC)
Mälardalen University, School of Sustainable Development of Society and Technology.
2009 (Swedish)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

As a part of the fight against the global warming the energy production needs to be more efficient and redirected towards sustainable options. One alternative is cogeneration, which means that electricity and heat is produced in one plant. The purpose with this survey is to examine if there are any commercial available combined heat and power techniques, based on combustion of solid moist biomass, which are suitable to small-scale applications. The technique must be able to produce between 2 and 10 MW thermal and the heat demand is a Swedish district-heating system. When already published reports had been studied, the Organic Rankine Cycle (ORC) was chosen as the most suitable technique. The possibility of using the ORC to generate electricity from the district-heating return flow was considered simultaneously. The chosen ORC-technique was then evaluated in Excel. The first aspect to be examined was how the performance of a combined heat and power plant was affected by variations in the supply line temperature. It showed that the performance reaches top levels when the temperature is low. The second part contains an optimisation, in a techno-economical perspective, of the ratio between cogeneration and separate heat production for district-heating systems with heat demands below 50 GWh/year. The most profitable combined heat and power plant generates 45 % of the installed power in a 50 GWh system. The profit is, however, too low to justify any construction plans. The conclusion was that there are no economical reasons to choose combined heat and power based on an organic rankine cycle in Sweden today.

Place, publisher, year, edition, pages
2009. , 85 p.
Keyword [en]
Organic Rankine Cycle (ORC), Biomass, Octamethyltrisiloxane, Cogeneration (CHP), Waste heat, FVB AB, Supply line temperature, Techno- economical optimization
Keyword [sv]
Organisk rankinecykel (ORC), Biobränsle, Oktametyltrisiloxan, Kraftvärme, Spillvärme, FVB AB, Framledningstemperatur, Tekno- ekonomisk optimering
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-6316OAI: oai:DiVA.org:mdh-6316DiVA: diva2:224216
Presentation
(English)
Uppsok
teknik
Supervisors
Examiners
Available from: 2009-06-30 Created: 2009-06-17 Last updated: 2009-06-30Bibliographically approved

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fulltext(2340 kB)2536 downloads
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Eriksson, Åsa
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School of Sustainable Development of Society and Technology
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CiteExportLink to record
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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf