VELUX China Headquarters

Ca s o s tu d i o : VELUX Ch i n a He a d q u a r te r s
S i to we b : h ttp ://www.co n s tr u cti o n 2 1 .o r g /i ta l i a /
VELUX China Headquarters
PUBBLICATO DA ROSTAMZAD | 0 6 LUGLIO 15
Tipo lo gia di pro getto : Nuo va co struzio ne
Tipo di edificio : Edificio per uffici di altezza
inferio re a 28 m
Anno di co struzio ne : 20 12
Zo na climatica : ET
Superficie utile calpestabile : 2 0 0 0 m 2
Other
Co sto di co struzio ne/ristrutturazio ne : 1
714 28 5 €
Numero delle unità funzio nali : 54
Po stazio ni di lavo ro
Co sti/m2 : 8 57 €/m 2
Co sti/Po stazio ni di lavo ro : 31 746
€/Po stazio ni di lavo ro
, 0 6 50 0 1 Langfang, Other co untries
// Descrizione
VELUX Langf ang Of f ice is the headquarters of VELUX China. Located in the Hebei province, around 45
kilometers f rom Beijing, the building houses management, marketing and the technical department and sales
division.
T he two-storey building, with slopping walls and in the shape of a pyramid with cut-out top, is the
workplace of 54 employees. T hey enjoy a range of f acilities on the company site, which is shared with the
nearby VELUX window f actory.
T he of f ice was completed in June 2013. It has signif icantly lower energy consumption than standard
Chinese of f ice building.
T he new Velux of f ice in Langf ang has been designed and built to meet several objectives:
A real estate objective:
- Co nso lidat e t he o perat io ns o n a single sit e (2 sit es bef o re)
- Being a sho wc ase o f t he Velux pro duc t s
- Sho w t he c o mmit ment o f t he Danish c o mpany t o sust ainabilit y and lo w c arbo n c o rpo rat e
po lic y.
An economical objective:
- T he operation must be neutral: the construction and operation costs are paid back by the
saved rent
- Co nt ro lled c o nst ruc t io n c o st in o rder t o replic at e t he mo del in t he Chinese market .
An environmental objective:
- Reac h a t arget value o f 40 KWh/m²/year (exc luding o f f ic e equipment ), and 55 kWh/m²/year
(inc luding o f f ic e equipment ) o f f inal energy c o nsumpt io n (2020 Danish t hermal regulat io ns)
- Having a great indo o r enviro nment al qualit y: The VELUX Langf ang Of f ic e aims t o sho w t hat
we c an impro ve wo rking c o ndit io ns wit h minimum enviro nment al impac t
At t e ndibilit à de i dat i :
Auto -dichiarazio ne
// Stakeholders
Agenzia di consulenza per impianti termici
No me : Terao
ano vel@terao .fr
Sito web : http://www.terao .fr, http://www.terao chinagb.cn
Azio ne : Energy mo deling, building envelo pe o ptimizatio n, design o f HVAC systems and asso ciated co ntro ls
Progettista
No me : Velux
christian.o [email protected] m
Sito web : http://www.velux.co m
Azio ne : Design o f the facades and daylighting o ptimizatio n
T ipo lo gia co nt rat t uale :
Macro lo tti
Appro ccio de l pro prie t ario alla so st e nibilit à e ne rge t ica : The Velux gro up is deeply invo lved wo rldwide in
sustainability. They are engaged with stakeho lders in the building industry, initiating experiments, develo pping affo rdable and
sustainable co ncepts, building demo nstratio n o ffices and ho uses, develo ping pro ducts that are energy efficient and have a
po sitive CO2 fo o tprint, and being exemplary by significantly reducing their energy co nsumptio n and CO2 fo o tprint.
De scrizio ne archit e t t o nica : VELUX Langfang Office was intended to be a sho wcase fo r o ptimal indo o r climate, energy
efficiency, daylight and natural ventilatio n. This o bjective required engineering ingenuity as well as architectural experience.
This building achives the right balance between passive so lar heating in winter, so lar shading in the summer, daylight harvest
and natural ventilatio n.
The trapezo id shape o ffers a mo re dynamic lo o k than mo st o ffices to wers, and it creates a better inflo w o f light thro ugh the
ro o f windo ws.
// Energia
Energy consumption
Fabbiso gno di e ne rgia prim aria : 170 ,0 0 kWh PE/m 2 /year
Fabbiso gno di e ne rgia prim aria de l m e de sim o e dif icio co st ruit o se co ndo gli st andard m inim i pre vist i dalla no rm at iva vige nt e :
370 ,0 0 kWh PE/m 2 /year
Me t o do di calco lo : Altro
CEEB : 0 ,0 0 kWh PE / €
Co nsum o di e ne rgia f inale : 55,0 0 kWh FE/m 2 /year
Ripart izio ne de l co nsum o di e ne rgia prim aria no n rinno vabile in uso : Heating: 8 kWh/m²/y
Co o ling: 13kWh/m²/y
Fans and pumps: 10 kWh/m²/y
Lighting: 10 kWh/m²/y
Office equipment: 14kWh/m²/y
Maggio ri inf o rm azio ni : The pro ject is fo llo wed-up using the IPMVP pro to co l during two years.
The real life energy co nsumptio n is 51 kWh/m²/y fo r the first year.
Performance dell'involucro
T rasm it t anza : 0 ,6 0 W.m -2 .K-1
Maggio ri inf o rm azio ni : 20 0 mm insulatio n in walls and ro o f
250 mm insulatio n belo w slab
High perfo rmance windo ws fro m Velux, Uw = 1.2W/m²K
Co e f f icie nt e di co m pat t e zza de ll\'e dif icio (f at t o re di f o rm a s/v) :
Indicat o re : I4 (I4) m 3 /H.m 2 n50 (Vo l/H) Q4
Indice di t e nut a all'aria de ll'invo lucro e dilizio :
0 ,25
0 ,8 0
Re ale co nsum o f inale di e ne rgia :
Re ale co nsum o f inale di e ne rgia / m 2:
0 .9 4
(20 14)
51 Re ale co nsum o f inale di e ne rgia / unit à f unzio nale :
// Fonti Rinnovabili e Impianti
Systems
Im piant o di riscaldam e nt o :
Po mpa di calo re geo termica
Riscaldamento a pavimento a bassa temperatura
So ffitto radiante
Sistema VAV (Variable Air Vo lume)
Im piant o di pro duzio ne di acqua calda sanit aria :
So lare termico
Im piant o di raf f re scam e nt o :
Refrigerato re ad acqua
Po mpa di calo re geo termica
Sistema VAV (Variable Air Vo lume)
Raffrescamento a pavimento
So ffitto radiante
Im piant o di ve nt ilazio ne :
Ventilazio ne naturale
Scambiato re di calo re a do ppio flusso
Sist e m i pe r lo sf rut t am e nt o di f o nt i di e ne rgia rinno vabili :
So lare termico
Po mpa di calo re (geo termica)
Pro duzio ne di e ne rgia rinno vabile : 6 ,0 0 %
The remarkable fact is that due to the thermal mass o f the TABS and the o ptimizatio n o f all energy requirements, the
preco nditio ned fresh air is sufficient to meet co mfo rt requirements even during peak summer heat o r peak winter co ld.
So lut io ns e nhancing nat ure f re e gains : So lar passive heating is enhanced with the o ptimized glazed area. No t o nly
the windo w to wall ratio is o ptimized but the windo w type is highly selective. Mo reo ver the blinds design and co ntro l
strategies have been tho ught to maximize so lar gains in winter
Smart Building
BMS : BMS allo ws energy perfo rmance mo nito ring and visualizatio n, co ntro ls HVAC systems. Blinds have auto matic
co ntro ls.
// Prestazioni ambientali
GHG emissions
Em issio ni di Gas se rra in f ase di ut ilizzo : 10 ,20 KgCO 2 /m 2 /year
Me t o lo gia ut ilizzat a : Active Ho use Life Cycle To o l - Energy co nsumptio n calculated using EnergyPlus energy
mo deling to o l
Em issio ni di Gas se rra in f ase di pro duzio ne e co st ruzio ne : 46 3,0 0 KgCO 2 /m 2
Durat a de ll'e dif icio : 50 ,0 0 year(s)
, cio è xx anni in uso : 45,39 year(s)
Em issio ni t o t ali di Gas se rra de ll'e dif icio : 1 436 ,70 KgCO 2 /m 2
Life Cycle Analysis
LCA has been co nducted using Active Ho use LCA to o l
Im pat t o de i m at e riali da co st ruzio ne sulle e m issio ni di gas se rra : 48 ,0 0
Im pat t o de i m at e riali da co st ruzio ne sul co nsum o e ne rge t ico : 3 26 5 357,0 0 kWhEP
Water & Indoor air quality
Co nsum o dal sist e m a idrico : 119 ,0 0 m 3
Co nsum o di acque grigie : 0 m 3
Co nsum o di acque m e t e o riche re cupe rat e : 0 m 3
Indice di aut o suf f icie nza pe r i co nsum i idrici : 0 %
Co nsum o idrico /m 2 : 0 ,0 6 m 3 /m 2
Co nsum o idrico /unit à f unzio nale : 2,20 m 3 /Po stazio ni di lavo ro
Qualit à de ll'aria int e rna : IAQ has been central to the pro ject fro m the start. In particular, abo ve standard fresh air
renewal rate have been planned. This was calibrated at 30 % abo ve euro pean standard requirements. This has been bo th a
requirement in terms o f IAQ and a mean to achieve thermal co mfo rt o nly blo wing fresh air in spaces (thanks to the TABS
co ntributio n to daily thermal lo ad leveling). Mo reo ver it is po ssible to use o perable Windo ws to increase fresh air
everywhere in the building.
He alt h & co m f o rt : Thermal co mfo rt is very go o d thanks to radiant system bo th in the flo o rs and ceilings. Besides the
temperature difference between slabs and ro o m air is lo wer than usually is with radiant systems fo r three reaso ns: The
slabs are "lo aded" during the night therefo re during the day the surface temperature has already varied to ward ro o m
temperature, The water pipes are in the mid plan o f the slab, meaning the actual slab surface temperature is quite different
fro m that o f the water, and lastly the radiant system ensures to meet the "base lo ad" whereas the fresh air system meets the
daily variable lo ads meaning that the system is no t sized with large temperature difference to meet high lo ads. Since fresh
air o nly is used to bring additio nal co mfo rt, users are no t subject to heavy draught induced by large airflo w rates.
Calculat e d indo o r CO2 co nce nt rat io n : 9 0 0 ppm
Me asure d indo o r CO2 co nce nt rat io n : between 6 0 0 ppm and 120 0 ppm
Calculat e d t he rm al co m f o rt : 22°C in winter and 24°C in summer
Me asure d t he rm al co m f o rt : 21°C to 26 °C
Aco ust ic co m f o rt : Aco ustic panels have been installed belo w ceilings. They are distributed in a way to allo w the
co ncrete to radiate the heat/co ld fro m the TABS system while impro ving significantly the aco ustic co mfo rt.
Daylight f act o r : 6 %
// Prodotti
VMS
Pro dut t o re : VELUX
Co nt at t o : +45 4516 40 0 0
Sit o we b: http://www.velux.co m/
Cat e go ria de l pro do t t o : Opere di finitura / Elementi esterni - Po rte e Finestre
De scrizio ne :
Very advanced insulatio n co efficient skylights Uw = 1.1W/m²K
Co m m e nt i:
Velux has carried o ut the acceptance pro cedure internally
// Costi
Co sto di co struzio ne/ristrutturazio ne : 1 714 28 5 €
Construction and exploitation costs
Co st o glo bale de ll\'e dif icio e quivale nt e co st ruit o ne l rispe t t o de i re quisit i m inim i di le gge :
Co st o de i sist e m i pe r lo sf rut t am e nt o di f o nt i di e ne rgia rinno vabili : 10 3 8 57,0 0 €
Rif e rim e nt o ai co st i glo bali/Po st azio ni di lavo ro : 1 371 428 ,0 0 €/Po stazio ni di lavo ro
Co st o de l pro ge t t o : 9 2 8 57,0 0 €
Co st o t o t ale de ll\'e dif icio : 1 714 28 5,0 0 €
Sussidi f inanziari : 0 €
Pre visio ne di spe sa annuale : 7 541,0 0 €
Co st i re ali di e ne rgia/m 2 : 3,77 € / m 2
Co st i re ali di e ne rgia/Po st azio ni di lavo ro :
139 ,6 5 €/Po stazio ni di lavo ro
// Qualità della pianificazione urbana
Am bie nt e urbano :
Langfang Industrial Park
Spazi ve rdi ad uso co m une :
Num e ro di parche ggi :
150 0
Parking facilities are in co mmo n use with the rest o f the facto ry site.
// Qualità ambientale dell'edificio
Qualit à am bie nt ale de ll\'e dif icio :
Acustica
1 371 428 ,0 0 €
// Concorsi
Categorie del concorso
Net zero energy buildings , Co nfo rt
The pro ject participates in the NZEB and Health and Co mfo rt co ntests because:
- It yields very high energy efficiency, especially if we co nsider the do uble challenge o f achieving Denmark 20 20 energy
perfo rmance thresho ld in China and in a climate zo ne where bo th winter (-10 °C with siberian Wind) and summer (40 °C humid)
are hard.
- The building has achieved the expected energy perfo rmance in real life after a careful M&V perio d o f two years
- The building achieves a go o d ratio o f renewable energy rate with the co ntributio n o f Gro und So urce Heat Pump and Building
Integrated So lar Thermal systems (altho ugh it was no t designed to reach NZEB at this stage but there is a po tential o f co upling
the pro ject with co generatio n based o n the wo o d waste fro m the windo w facto ry o n site)
- The building design haas been centered aro und the o bjective o f energy perfo rmance. No t o nly the envelo pe is very efficient
but the HVAC systems are well co mbined, a pro per mix between efficient techno lo gies and inno vatio n. We must mentio n that
co mbining VAV dedicated o utdo o r air system, radiant slabs/ceilings based o n extreme thermal mass effect and gro und
so urce heat pump was a challenge in China and a lo t o f effo rt has been put o n the integratio n o f systems and o n quality
insurance. Lastly the BMS has been carefully designed and defined to just meet the need (no extra/unnecessary functio ns, the
prio rity has been given to the use)
- The building also aims at very go o d co mfo rt level. The target co mfo rt and indo o r air quality level have been defined as per
CEN reco mmendatio n repo rt 1752:19 9 9 Class B
- Fresh air rate has been increased by 30 % co mpared to the abo ve mentio ned Baseline bo th in o rder to impro ve IAQ and to
meet co mfo rt zo ne. Indeed the pro ject is so efficient that o nly preco nditio nned fresh air is required to meet co mfo rt. This is
also po ssible thanks to the principle o f TABS (Thermally Active Building Slab) that make best use o f thermal mass
- Co mfo rt and Health is also ensured by an abundant daylight. One can say that Velux has designed the architecture o f the
pro ject aro und daylight, that it is the DNA o f the building. As a result indo o r spaces are very pleasant. Daylight and views o n
o utdo o r space (large green spaces with "happy farm" co ncept are visible fro m o ne side o f the building) are kno wn to be
impo rtant facto rs fo r wo rkers well-being.