Green Lighthouse

Etu d e d e ca s : G r e e n Li g h th o u s e
S i te We b : h ttp ://www.co n s tr u cti o n 2 1 .o r g /fr a n ce /
Green Lighthouse
PUBLIÉ PAR BJØRN-MORTENSEN | 22 JUIN 15
Type de pro jet : Co nstructio n Neuve
Type de bâtiment : Immeuble de bureaux
Année de co nstructio n : 20 0 9
Zo ne climatique : Cfb
Surface nette : 9 50 m 2
Co ût de co nstructio n : 5 0 0 0 0 0 0 €
No mbre d'unités fo nctio nnelles : 37 Po ste
de travail
Co ût/m² : 5 26 3 €/m 2
Co ût/Po ste de travail : 135 135 €/Po ste de
travail
, 220 0 København N, Denmark
// Description
Green Lightho use is Denmark’s first public carbo n-neutral building. The building has been built in less than a year in a clo se
public/private partnership.
Green Lightho use is an energy-efficient building o f great architectural merit, with a high influx o f daylight. Inspired by the sundial
and the mo vement o f the sun aro und the building, Green Lightho use plays o n the sun as a so urce o f energy and o n its ro le in
science. As sustainable as it is healthy, Green Lightho use relies o n district heating, so lar cells, so lar heating and co o ling,
seaso nal sto rage and inno vative architecture to create a go rgeo us, CO 2-neutral building.
The partners behind the building bo th fro m the public and the private sphere. They are the University o f Co penhagen, VELUX,
VELFAC, the Danish Building and Pro perty Agency (UBST) and the City o f Co penhagen.
Plus de dé t ails sur ce pro je t :
http://www.velux.co m/sustainable_living/demo nstratio n (...)
http://www.greenlightho use.ku.dk
Fiabilit é de s do nné e s :
Certifié tierce partie
// Intervenants
Architecte
No m : Christensen & Co Architects
Michael Christensen
Site Web : http://www.cco .as
Maître d'ouvrage
No m : Hellerup Byg
-
Bureau d'études autre
No m : COWI
Peter Lawaetz
Site Web : http://www.co wi.dk
Actio n : Energy design
Autre intervenant
No m : Municipality o f Co penhagen
Anne Sko vbro
Site Web : http://www.kk.dk
Actio n : Strategic Partner
Autre intervenant
No m : University o f Co penhagen
Lykke Friis
Site Web : http://www.ku.dk
Actio n : Strategic partner & Building Owner
Mo de co nt ract ue l :
Partenariat Public Privé
Dé m arche dé ve lo ppe m e nt durable du m aît re d'o uvrage : The Green Lightho use is meant to be a lightho use in mo re
than o ne sense. It was built as a green lightho use fo r CO2-neutral buildings up to the UN Climate Co nference in Co penhagen
in 20 0 9 (COP15); it as meant as a lightho use fo r efficient public-private co o peratio n; and last, but no t least, it stands as a
lightho use fo r the Faculty o f Science at the University o f Co penhagen, which will see its student services co nso lidated under
o ne ro o f.
Every element in Green Lightho use was cho sen fo r its energy efficiency and fo r the well-being o f tho se wo rking in and visiting
the building. An o pen, inviting space that is full o f natural light, Green Lightho use certainly stands o ut amo ngst the traditio nal
buildings in the neighbo urho o d.
De script io n archit e ct urale : A ro und, sculptural building, Green Lightho use features high ceilings and an o pen, spacio us
flo o rplan. It is designed in a way that reduces energy co nsumptio n by 70 % utilising renewable energy, natural ventilatio n and
light – and with a highly efficient climate envelo pe. Its circular fo rm ensures the inner atrium is awash in uplifting natural light
fro m the ro o f’s many ro o f windo ws. The central space is also crucial in terms o f ventilatio n as fresh air fro m the façade
windo ws is channelled thro ugh the atrium befo re it leaves thro ugh the ro o m’s ro o f windo ws.
The sun is the building’s main energy so urce, pro viding passive so lar gain, ho t water and electricity. Efficient windo ws
minimise the heat lo ss while maximising passive so lar gain. Green Lightho use’s angled ro o f plays an active ro le in the
building’s energy pro file. It acts as a po wer plant, capturing the sun’s energy using bo th so lar panels and so lar cells.
The façade is made fro m Swissfiber, a 30 % glass, 70 % po lymer co mpo site material that is extremely light and stro ng. In fact,
the entire façade weighs o nly six to nnes. By co mpariso n, a similar so lutio n in tile wo uld have weighed mo re than 175 to nnes
and been co nsiderably thicker.
A so lar clo ck mo tive fo r the shape o f the building, the renewable energy so urcing and the integrated art piece
Et si c'é t ait à re f aire ? : We co mmissio ned the first year into the turnkey co ntract, this was a go o d experience. Fo r next
pro jects, it sho uld be co mmissio ned fo r 3-5 years.
Opinio n de s o ccupant s : Very go o d indo o r climate, cf interviews made fo r "Green Buildings Pay" bo o k written by Brian
Edwards & Emanuele Nabo ni, ed. 3, Ro utledge
// Energie
Consommation énergétique
Be so in e n é ne rgie prim aire : 3,0 0 kWh PE/m 2 /year
Be so in e n é ne rgie prim aire bât im e nt st andard : 6 0 ,0 0 kWh PE/m 2 /year
Mé t ho de de calcul : Autre
CEEB : 0 kWh PE / €
Ré part it io n de la co nso m m at io n é ne rgé t ique :
8 lighting;
5 ventilatio n;
3 ho t water;
27 pro ductio n - so lar thermal & PV
14 heating;
Performance énergétique de l'enveloppe
UBat de l\'e nve lo ppe : 0 ,0 8 W.m -2 .K-1
Plus d'inf o rm at io n sur l'e nve lo ppe : prefabricated; thermo active slabs gro und and first flo o r
Co e f f icie nt de co m pacit é du bât im e nt : 0 ,6 0
Indicat e ur : DIN EN 138 29 - n50 » (en 1/h-1) (I4) m 3 /H.m 2 n50 (Vo l/H) Q4
Et anché it é à l'air : 0 ,74
Co nso m m at io n ré e lle (é ne rgie f inale ) :
Co nso m m at io n ré e lle (é ne rgie f inale ) /m 2:
44 (20 10 )
// EnR & systèmes
Systèmes
Chauf f age :
Réseau de chauffage urbain
Po mpe à chaleur
Autres
So laire thermique
ECS :
Réseau urbain
Po mpe à chaleur
So laire thermique
Raf raîchisse m e nt :
Climatisatio n so laire
Ve nt ilat io n :
Ventilatio n naturelle
Do uble flux avec échangeur thermique
Ene rgie s re no uve lable s :
So laire pho to vo ltaïque
So laire thermique
Valo risatio n énergétique des déchets
Pro duct io n d'é ne rgie re no uve lable : 9 0 ,0 0 %
heat pump fro m So rttech, fluid/fluid, co nnected to the grid, and to a seaso nal sto rage
So lut io ns am é lio rant le s gains passif s e n é ne rgie : heat pump COP 1,6 o n district heating
Bâtiment intelligent
GT C : Windo w Master system co mbined with BMS classic
Opinio n de s o ccupant s sur le s syst è m e s do m o t ique s :
Easy and adaptive - wo rks fro m every wo rk statio n
// Environnement
Eau et qualité de l'air intérieur, santé et confort
Qualit é de l'air int é rie ur : Based o n the relative co mfo rt principle, acco rding to EN 15 251. User is co nnected to
o utdo o rs visually, and also in terms o f co mfo rt. During winter, the IAQ is stable based o n mechanical ventilatio n and heat
exchange, during summer the users enjo y natural ventilatio n, co mbined with night co o ling.
Co nf o rt & sant é : The architectural co ncept o f the ho use is the sun dial; the ho use fo llo ws the sun, also by its windo w
design, where the facade windo ws and exterio r sunscreening fo llo w the path o f the sun. The users can fo llo w the seaso ns
changing, and adapt the indo o r climate individually. The ho use is flo o ded with daylight o n all flo o rs, and there is a "cathedral
effect" thro ugh the central atrium, where users benefit fro m a 250 0 + lux experience, to benefit their well-being and
pro ductivity.
Co nce nt rat io ns sim ulé e de CO2 e n int é rie ur : 70 0 ppm
Co nce nt rat io ns m e suré e s de CO2 e n int é rie ur : 6 50 ppm in average
Co nf o rt t he rm ique calculé : Class 2 in EN 15251
Fact e ur lum iè re nat ure lle : 5 %
// Produits
Heat pump and seasonal storage and district heating in combination
Cat é go rie de pro duit :
De script io n:
heat pump designed fo r so lar co o ling, used reverse; taking in ho t water fro m the ro o f - so lar thermal, by use o f seaso nal
sto rage fro m summer to winter, and then adding the district heating. http://www.so rtech.de/en/
Co m m e nt aire s:
wo rked well - o nly few pro blems with vacuum
// Coûts
Co ût de co nstructio n : 5 0 0 0 0 0 0 €
Coûts de construction & exploitation
Co ût é t ude s : 50 0 0 0 ,0 0 €
Co ût t o t al : 5 0 0 0 0 0 0 ,0 0 €
Facture énergétique
Fact ure é ne rgé t ique pré visio nne lle / an : 2 0 0 0 ,0 0 €
co ût é ne rgé t ique ré e l / m ² : 2,11 € / m 2
Co ût é ne rgé t ique ré e l : 54,0 5 €/Po ste de travail
// Environnement urbain
Enviro nne m e nt urbain :
Surf ace du t e rrain :
High density, inner urban Co penhagen
10 0 0 m 2
Surf ace au so l co nst ruit e :
Parking :
20 spaces
20 %
// Qualité environnementale du bâti
Qualit é e nviro nne m e nt ale du bât i :
Adaptabilité du bâtiment
Santé, qualité air intérieur
aco ustique
co nfo rt (o lfactif, thermique, visuel)
efficacité énergétique, gestio n de l\'énergie
// Concours