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Utredning av potentiell installation av bergvärme
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2019 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Investigation of potential installation of geothermal heating (English)
Abstract [en]

A housing society in the municipality of Umeå have under a period found interest in lowering their heating costs for the property. The property consists of 4 buildings in total with 3 of them being a multi-family residential containing 36 apartments in total and one of the buildings is an office building. The housing society was interested in knowing what a geothermal heating system would cost and how long the payback time would be.

With the help of the old drawings the property was drawn in Revit and used to calculate the heat loss from different layers of the climate barrier and heat loss from the ventilation system. The internal heat generation was calculated by using standard values. When the total heat losses were calculated, and the internal heat generation was known the yearly energy needs were calculated by using a duration diagram.

Then the yearly energy needs were compared to the actual yearly energy consumption of district heat and the software Nibe Dim was used to simulate three different alternatives.

The investment that showed best result showed that the total cost for the investment would be 1 800 000 SEK and the annual saving 75 000 SEK/year. The payback time for the investment would however be as high as 24 years.

Abstract [sv]

En bostadsrättsförening i Umeå kommun har under längre tid varit intresserade av att sänka kostnaderna för uppvärmningen av fastigheten. Fastigheten består totalt av 4 byggnader där 3 är flerbostadshus med totalt 36 lägenheter och en kontorsbyggnad. Bostadsrättsföreningen var intresserade av att veta vad en installation av bergvärme skulle kosta och hur lång payback-tid det resulterar i.

Genom att rita upp fastigheten i Revit med hjälp av ritningar kunde klimatskärmens skikt och drift av ventilation sammanställas för att beräkna energiförlusterna. Den interna värmegenereringen beräknades med hjälp av schablonvärden. Med de totala värmeförlusterna och den interna värmegenereringen kunde det årliga energibehovet beräknas med hjälp av varaktighetsdiagram.

När det årliga energibehovet var känt jämfördes det med den årliga fjärrvärmeanvändningen och programmet Nibe Dim användes för att välja ut tre olika alternativ.

Billigaste installationen av bergvärme visar att av de tre alternativ som presenteras skulle det innebära en investeringskostnad på 1 800 000 kr med en besparing på 75 000 kr/år. Återbetalningstiden för investeringen blir emellertid så hög som 24 år.

Place, publisher, year, edition, pages
2019. , p. 28
Keywords [sv]
Bergvärme, Fjärrvärme
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:umu:diva-160551OAI: oai:DiVA.org:umu-160551DiVA, id: diva2:1327675
External cooperation
TM Konsult
Subject / course
Energiteknik
Educational program
Bachelor of Science Programme in Energy Engineering
Presentation
2019-06-03, Umeå, 10:55 (Swedish)
Supervisors
Examiners
Available from: 2019-06-20 Created: 2019-06-19 Last updated: 2019-06-20Bibliographically approved

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CiteExportLink to record
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Citation style
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