hig.sePublikasjoner
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Energy Audit in two Multifamily Buildings and Economical Evaluation of possible Improvements: Case Study of District-heated Buildings with Mechanical Ventilation located in middle Sweden
Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Energisystem.
2018 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
Abstract [en]

The energy performance of the buildings is important for economic and environmental aspect. The building energy use is gradually increasing. This is due to economical growth and increase in population. There are various energy efficiency measures that can be implemented provided they are economically feasible. Several Studies show that the implementation of energy saving measures such as thermal insulation results in more energy saving. However, most of the outlined measures are not economically viable.

The paper outlines the energy efficiency measures through the use of the computer IDA ICE software. The evaluation of energy performance of two multifamily houses was conducted and possible suggestions such as thermal insulation, change of the windows, installing new air handling unit, installing heat exchange in the showers, improving the thermal bridges and change of schedules were presented.

The economic feasibility of the suggestions is analysed using the life cycle cost to determine the economic viability of the energy measures. This involved determine the investment cost and life cycle saving cost to decide the best option. The most important factor in determining life-cycle saving is the modified uniform net present factor.  The addition of attic insulation, replacement of lighting bulbs, installing heat exchange in the showers and change of schedules, meet the economical requirement within the required time frame.

The total energy saving from the measures that meet the economical requirement was approximately 71 MWh/year for Centralgatan 14 and 54 MWh/year of Tebogatan 5 corresponding to 24 % for Centralgatan 14 and 20.4 % of Tebogatan 5 reduction in heating demand. Replacement of lighting bulbs results in 5 MWh/year and 7.51 MWh/year  electricity energy saving for Tebogatan 5 and Centralgatan 14 respectively. The integration of energy measures has less impact on thermal comfort. The energy measures implementaed are within the acceptable limit of < 15 % PPD for thermal comfort apart from the combined effect of adding 200 mm external insulation plus lowering indoor temperature.

Key word: energy audit, economical anaylysis, life cycle savings, investment cost, energy efficiency, IDA ICE

sted, utgiver, år, opplag, sider
2018.
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-27135OAI: oai:DiVA.org:hig-27135DiVA, id: diva2:1220455
Fag / kurs
Energy systems
Utdanningsprogram
Energy systems – master’s programme (two years)
Veileder
Examiner
Tilgjengelig fra: 2018-06-26 Laget: 2018-06-18 Sist oppdatert: 2018-06-26bibliografisk kontrollert

Open Access i DiVA

fulltext(1842 kB)124 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 1842 kBChecksum SHA-512
99a0196d87651abe992bcd4f94f5671451fab198b9e008cdd848a6328d1230f755c1d1ebb2ff7b44acb8c39fadf0e79a8c4ce817779fea099a5dc45ca87e147d
Type fulltextMimetype application/pdf

Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 124 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 98 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • sv-SE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • de-DE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf