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Heating systems in small houses: A comparison between geothermal heating and district heating
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
2019 (English)Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesisAlternative title
Värmesystem i småhus : En jämförelse mellan bergvärme och fjärrvärme (Swedish)
Abstract [en]

District heating and geothermal heating are in present times two established heating systems that are often compared against each other. The purpose of this work is to describe which factors influence the choice of heating system during the planning stage and what the costs are for each system. In this paper, a typical house model has been developed and used as a basis for the comparison of both systems. The comparison has been made in the form of energy calculations in the energy calculation program BV2, where heat requirements and regulatory requirements for energy performance have been compared in different geographical areas in Sweden. Furthermore, cost calculations have been carried out based on the energy calculations' results, where investment costs and annual costs have been set against each other. The result of the work shows how the measurement of energy performance differs from the actual amount of purchased energy due to geographical conditions. In the southern parts of Sweden, where the geographical correction factor is below 0, consumers are penalized by raising the primary energy number, unlike the northern parts where the primary energy number is instead lowered. Based on the cost calculations, it can be concluded that district heating, when available, is more economically advantageous in the short term. Geothermal heating on the other hand is a more profitable alternative in the long run.

Abstract [sv]

Fjärrvärme och bergvärme är idag två etablerade värmesystem som ofta ställs mot varandra. Syftet med det här arbetet är att redogöra vilka faktorer som påverkar valet av värmesystem under projekteringsstadiet och vilka kostnaderna som finns för respektive system. I arbetet har en typisk husmodel tagits fram och använts som grund för jämförelsen av båda systemen. Jämförelsen har dels gjorts i form av energiberäkningar i energiberäkningsprogrammet BV2 där värmebehov och myndighetskrav på energiprestanda har jämförts i olika geografiska områden i Sverige. Vidare har kostnadsberäkningar genomförts utifrån energiberäkningarnas resultat där investeringskostnader och årliga kostnader har ställts mot varandra. Resultatet av arbetet visar hur måttet på energiprestanda skiljer sig från den faktiska mängden köpt energi på grund ut av geografiska förhållanden. I de södra delarna i Sverige där den geografiska korrigeringsfaktorn understiger 0 straffas konsumenter genom att primärenergitalet höjs, till skillnad mot de norra delarna där primärenergitalet istället sänks. Utifrån kostnadsberäkningarna kan man dra slutsatsen att fjärrvärme, när den finns tillgänglig, är mer ekonomiskt fördelaktigt på kort sikt. Bergvärme å andra sidan är ett mer lönsamt alternativ på lång sikt.

Place, publisher, year, edition, pages
2019. , p. 34
Series
TRITA-ABE-MBT ; 19208
Keywords [en]
Heating system, Geothermal heating, District heating, Comparison, Energy performance
Keywords [sv]
Värmesystem, Bergvärme, Fjärrvärme, Jämförelse, Energiprestanda
National Category
Construction Management
Identifiers
URN: urn:nbn:se:kth:diva-253799OAI: oai:DiVA.org:kth-253799DiVA, id: diva2:1326402
External cooperation
Zetagraf AB
Educational program
Higher Education Diploma - Construction Management
Available from: 2019-06-18 Created: 2019-06-18 Last updated: 2019-09-27

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