Energy Efficient Lighting in Buildings: Copenhagen Case Study on a Sustainable Transition to Energy Efficient Lighting in Buildings

Energy Efficient Lighting in Buildings

Brilhante das Neves, Joana

4. term

Sustaianable Cities, Master

2016

2016-09-05

54

Bygninger står for det største energiforbrug i byer og er derfor i fokus for mange energisparetiltag. For at nå målet om at være CO2-neutral i 2025 har Københavns Kommune sat flere mål, blandt andet at reducere bygningernes energiforbrug med 40% i forhold til 2010. Som led heri gennemfører kommunen et pilotprojekt, Copenhagen Efficient Light Project (CELP), hvor belysningssystemer i alle kommunale bygninger opgraderes med meget energieffektive LED-armaturer (LED-baserede belysningsarmaturer). Denne rapport, inspireret af pilotprojektet, undersøger hvilke gevinster en overgang til LED-belysning i kommunens bygninger kan give. Rapporten omfatter tre studier: (1) en cost-benefit-analyse af at gennemføre CELP i fire typer kommunale bygninger; (2) et overslag over de samlede energibesparelser, hvis CELP’s særlige LED-armaturer erstatter eksisterende armaturer i alle bygninger i København; og (3) to cost-benefit-analyser for en privat husstand: a) at udskifte armaturer med CELP-designede armaturer og b) kun at udskifte pærerne med LED-pærer fra et dansk supermarked. Derudover anvendes begreber fra Multi-Level Perspective (MLP) – en teori om hvordan innovationer breder sig – sammen med resultaterne for at vurdere, om og hvordan CELP kan udløse en bæredygtig omstilling inden for indendørs belysning. Resultaterne peger på, at indførelse af LED-belysning i stor skala kan spare betydelige mængder elektricitet. I husholdninger, hvor lyset kun er tændt få timer om dagen, har dagens LED-pærer dog primært klare fordele over halogenlamper, men endnu ikke over kompaktlysrør (CFL). Samlet set konkluderer rapporten, at indendørs belysning rummer et stort potentiale for elbesparelser og er et vigtigt område for videre forskning.

Buildings use the most energy in cities, so they are a key focus for energy-saving efforts. To meet its goal of becoming carbon neutral by 2025, the City of Copenhagen has set several targets, including cutting building energy use by 40% compared to 2010. As part of this, the municipality is running a pilot, the Copenhagen Efficient Light Project (CELP), which upgrades lighting in all municipal buildings with highly efficient LED luminaires (LED lighting fixtures). This report, inspired by the pilot, examines the benefits of switching to LED lighting in municipal buildings. It presents three studies: (1) a cost-benefit analysis of implementing CELP in four groups of municipal buildings; (2) an estimate of total energy savings if CELP’s special LED luminaires replaced existing luminaires in all buildings across Copenhagen; and (3) two cost-benefit analyses for a private household, comparing (a) replacing luminaires with CELP-designed luminaires and (b) replacing only light bulbs with off-the-shelf LED bulbs from a Danish supermarket. The report also applies concepts from the Multi-Level Perspective (MLP)—a theory of how innovations spread—to assess whether and how CELP could trigger a broader, sustainable transition in indoor lighting. The findings suggest that large-scale use of indoor LED lighting could save substantial electricity. In households where lights are used only a few hours per day, today’s LED bulbs offer clear advantages over halogen lamps, but not yet over compact fluorescent lamps (CFLs). Overall, the report concludes that indoor lighting has high potential for electricity savings and deserves further research.

[This abstract was generated with the help of AI]

Energy Efficient Lighting ; Lighting in Buildings ; LED ; Cost-benefit Analysis ; Multi-level Perspective

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