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Energieffektivisering av uppvärmningssystem i småbostadshus
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2015 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Improving energy efficiency of a heating system in a single-family detached home (English)
Abstract [sv]

Uppvärmningen av ett småbostadshus står vanligen för kring hälften av dess energianvändning. Enligt energimyndigheten drar det svenska standardhuset 22,7 MWh per år varav 12,2 MWh går till uppvärmning. Att ge värmesystemet så bra förutsättningar som möjligt bör alltså vara av intresse för varje husägare, kanske främst ur ett ekonomiskt perspektiv men även ur ett ekologiskt perspektiv.

I detta arbete har olika energieffektiviseringsåtgärder studerats som kan implementeras i en tvåplansvillas värmesystem bestående av en värmepump, golvvärme på nedervåningen och olika värmedistributionssystem på övervåningen. Åtgärderna har innefattat både praktiska såsom val av isolering i golvvärmesammanhang och mer teoretiska såsom reglerstrategier. Relevant teori för de ingående systemen har presenterats och utgjort grunden för implementeringar av systemen i simuleringsprogrammet IDA Indoor Climate and Energy. Programmet har använts för att simulera en modellbyggnad utrustad med de olika systemlösningarna varvid resultaten sedan jämförts mot varandra.

Det mest energieffektiva systemet på övervåningen har visat sig vara lågtempererade radiatorer tack vare kombinationen med golvvärme på nedervåningen vilket tillåter värmepumpen att arbeta med en lägre värmekurva. Även då golvvärme på övervåningen användes erhölls en låg energiförbrukningen, dock på bekostnad av komforten. Elradiatorer, vilka inte kan utnyttja energin som värmepumpen hämtar ur värmekällan, gav den högsta energiförbrukningen.

Abstract [en]

Heating of a single family residence usually constitutes about half of the total energy consumption. According to Energimyndigheten, the average Swedish house consumes 22,7 MWh whereof 12,2 MWh goes to heating. To bring about as good conditions for the heating system as possible should be of interest for every house owner, maybe mostly out of an economic point of view but also out of an ecologic point of view.

This work have studied different efforts aiming towards a more energy efficient system that can be implemented in the heating system of a two story single-family house equipped with a heat pump, floor heating on the first floor and different heat distribution systems on the second floor. The different efforts include both practical such as choice of insulation in relation to floor heating and more theoretical such as control strategies. Relevant theory for the different subsystems has been presented and used for implementation in the simulation software IDA Indoor Climate and Energy. The program was used to simulate a building model equipped with the different heating systems in which the results are compared to each other.

The most energy efficient system on the second floor proved to be low temperature radiators due to the combination with the floor heating system on the first floor which allows the heat pump to operate with a lower heating curve. Although floor heating on the second floor also yielded a low energy consumption, it was at the expense of comfort. Electric radiators, which cannot take advantage of the energy the heat pump collects from the heat source, yielded the highest energy consumption.

Place, publisher, year, edition, pages
2015. , 42 p.
Keyword [sv]
energieffektivisering, energi, effektivisering, värmesystem, uppvärmningssystem, uppvärmning, golvvärme, radiator, radiatorer, värmepump, bergvärmepump, småbostadshus, enfamiljshus, villa, cad, simulering, ida ice, ida, indoor climate and energy
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:umu:diva-105184OAI: oai:DiVA.org:umu-105184DiVA: diva2:823896
External cooperation
Thermotech Scandinavia AB
Subject / course
Energiteknik
Educational program
Master of Science Programme in Energy Engineering
Presentation
2015-05-28, 10:30 (Swedish)
Supervisors
Examiners
Available from: 2015-06-23 Created: 2015-06-18 Last updated: 2015-06-23Bibliographically approved

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Energieffektivisering av uppvärmningssystem i småbostadshus(1782 kB)350 downloads
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