Izuba Energies Building

Ca s o s tu d i o : Iz u b a En e r g i e s B u i l d i n g
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 /
Izuba Energies Building
PUBBLICATO DA THIERS | 0 9 GIUGNO 16
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 15
Zo na climatica : [Csa] Interio r
Mediterranean - Mild with dry, ho t summer.
Superficie utile calpestabile : 453 m 2
Co sto di co struzio ne/ristrutturazio ne : 9 34
000 €
Numero delle unità funzio nali : 18
Po stazio ni di lavo ro
Co sti/m2 : 2 0 6 2 €/m 2
Co sti/Po stazio ni di lavo ro : 51 8 8 9
€/Po stazio ni di lavo ro
, 346 9 0 Fabrègues, France
// Descrizione
Spec ializ ed in energy and enviro nment al o pt imiz at io n o f buildings, Iz uba Energies develo ps and
disseminat es t o o ls f o r t he energy t ransit io n (st udies, so f t ware, t raining). To c o pe wit h t he develo pment
o f it s business, t he c o mpany dec ided t o build it s headquart ers and o f f ic es near Mo nt pellier, o n Ec o parc
Fabrègues. This building ref lec t s what IZUBA Energies suppo rt ed sinc e it s c reat io n in 2001: a "negawat t "
energy appro ac h wit h it s 3 c o mpo nent s (simplic it y, ef f ic ienc y and renewable energy), c o upled wit h a
c o mprehensive appro ac h int egrat ing hygro t hermal c o mf o rt , gray energy c o mpo nent s, user behavio r,
wast e management , indo o r air qualit y, t he t ranspo rt o f emplo yees... t he realiz at io n o f t he Iz uba Energies
building embo dies an exemplary ac hievement o f it s business plan and it s expert ise.
Maggio ri de t t agli sul pro ge t t o :
http://batiment.izuba.fr
At t e ndibilit à de i dat i :
Auto -dichiarazio ne
// Stakeholders
Committente
No me : IZUBA énergies
Eduardo Sero dio - eduardo .sero dio @izuba.fr - 0 46 718 6 221
Sito web : http://www.izuba.fr
Azio ne : energy engineer - co mmunicatio ns
Direttore dei lavori
No me : Rigassi Architectes Asso ciés
Mr Vincent Rigassi - [email protected] - 0 476 471172
Sito web : http://www.ra2.fr
Committente
No me : IZUBA énergies
Stéphanie Gautier - [email protected] - 0 46 718 48 9 4
Sito web : http://www.izuba.fr
Azio ne : energy engineer - respo nsible building pro ject
T ipo lo gia co nt rat t uale :
Lo tti separati
Appro ccio de l pro prie t ario alla so st e nibilit à e ne rge t ica :
lo cal bio -based materials, to reduce enviro nmental impacts.
The go al was to build a po sitive energy building, using
De scrizio ne archit e t t o nica : The architectural design, vo luntarily so ber, was based o n bio climatic principles: the building
must adapt better to the Mediterranean climate to ensure o ccupant co mfo rt.
In winter heating requirements are reduced to a minimum:
• The building has a simple shape and a go o d co mpactness, to limit lo ss surfaces.
• The main facade so uth favo rs so lar gain in o ffices, the majo rity o n this o rientatio n. Sto rage facilities and service are
po sitio ned buffer space to the no rth.
• The cho ice o f timber frame insulated with straw pro vides a very high level o f insulatio n o f the walls.
In summer, the envelo pe limit o verheating by ado pting the fo llo wing principles:
• The building is equipped with fixed and mo bile so lar pro tectio n blo cking direct sunlight while allo wing so lar gain in winter.
• The thermal inertia, rather light wo o d frame is reinfo rced by interio r partitio ns earth-straw and mud brick.
• A natural night ventilatio n is made po ssible by the o pening o f swinging wo o dwo rk o n two o ppo site sides o f the building and
glass transo ms facing traffic. Circulatio ns are lighted and ventilated by o ffice do o rs and exterio r do o rs at the end o f the
co rrido r, all glass and equipped with o verhead transo ms.
Co sa cam bie re st i se do ve ssi f arlo di nuo vo ? : The vast majo rity o f pro ducts and systems implemented were
satisfacto ry. The exceptio n is the anhydrite screed left ro ugh after sanding and applying a hard pro tective o il. Due to pro blems
o f tasks and premature wear co rrective actio n is being studied to make the hard, impervio us surface, while respecting the
o bjective o f air quality inside.
Opinio ni de gli ut ilizzat o ri de ll\'e dif icio : The o ccupant satisfactio n is generally very po sitive. The premises are
co nsidered light, with a healthy and warm atmo sphere due to the presence o f wo o d and earth. Thermal co mfo rt is so metimes
difficult to adjust to the individual sensitivity o f the o ccupants (heating / co o ling flo o r).
// Energia
Energy consumption
Fabbiso gno di e ne rgia prim aria : 20 ,40 kWh EP/m 2 /an
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 :
135,0 0 kWh EP/m 2 /an
Me t o do di calco lo : RT 20 12
CEEB : 0 ,0 0 kWh PE / €
Ripart izio ne de l co nsum o di e ne rgia prim aria no n rinno vabile in uso :
- Heating: 2.0 kWhEF / m² / year
- Co o ling: 0 .8 kWhEF / m² / an
- Ho t Water: 0 .5 kWhEF / m² / year
- Ventilatio n: 4.6 kWhEF / m² / year
- Auxiliary: 0 .5 kWhEF / m² / year
- Lighting: 2.7 kWhEF / m² / year
- Specific Electricity: 9 .3 kWhEF / m² / year
Estimated energy balance befo re delivery:
Performance dell'involucro
T rasm it t anza : 0 ,38 W.m -2 .K-1
Maggio ri inf o rm azio ni : -Timber frame insulatio n straw
- Exterio r wall: Up = 0 .17 W / m²K. wo o d bo x / straw insulatio n 37cm o f straw, earth plaster / straw (inside and o utside)
- Ro o f: Up = 0 .15 W / m²K. wo o d bo x / straw, straw insulatio n 37cm lo w
- Flo o r: Up = 0 .16 W / m²K. co ncrete slab-o n-grade, 11 cm extruded po lystyrene
- Jo inery: Up = 1.5 W / m²K. jo inery wo o d do uble glazing 4/16 /4 lo w emissivity argo n
- Thermal bridge: Psi means building: 0 .14 W / (m²SRT.K)
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) : 0 ,6 4
Indicat o re : n50 (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 ,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:
70 5
(20 15)
28 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
Termo ventilco nvetto re
So lar thermal
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 :
Po mpa di calo re geo termica
Emissio ne - Ventilco nvetto ri
Raffrescamento a pavimento
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 fo to vo ltaico
So lare termico
Po mpa di calo re su so nde geo termiche
Pro duzio ne di e ne rgia rinno vabile : 317,0 0 %
Heating / co o ling pro ductio n: Heat pump Weishaupt WWP S 10 IBER
- Heat: 9 .5 kW, COP 4.2
- Co ld: 14.6 kW, EER 9 .1
Transmitters: flo o r heating / co o ling and fan co nvecto rs training ro o m
ventilatio n dual flo w ventilatio n Swego n Go ld RX TOP maximum flo w 120 0 m3 / h
efficiency wheel exchanger: 8 1%
air tightness o f the duct system: class C
ECS electro -so lar water heater 20 0 liters,
1 so lar thermal co llecto r 2 m²
Lighting
Offices, training ro o ms and meeting: tubes T5 - 6 to 14 W / m²
Circulatio ns and health: LED - 3-8 W / m²
Sto rage, server ro o m: co mpact fluo rescent lamps - 13 W / m²
pho to vo ltaic pro ductio n To tal Po wer: 28 .8 kWp - 8 8 mo dules Sunpo wer E20 -327-COM average yield o f 20 .4%
So lut io ns e nhancing nat ure f re e gains : main o rientatio n so uth to take advantage o f so lar gain.
Smart Building
BMS : Trend 9 6 3 Superviso r - Measurement o f co nsumptio n and energy pro ductio n in the po st in 10 minutes o f time Visualizatio n and co ntro l the heating, co o ling and ventilatio n
Use r\'s o pinio n o n co nt ro l syst e m s : The GTC system displays the o perating states and co ntro l o f HVAC installatio n.
The interface is user-friendly and publicly accessible to thermic engineer o f Izuba Energy team.
// Prestazioni ambientali
GHG emissions
Em issio ni di Gas se rra in f ase di ut ilizzo : 1 576 ,0 0 KgCO 2 /m 2 /an
Me t o lo gia ut ilizzat a : no vaEquer ACV basis Eco invent 20 10 . Sco pe o f study: building energy co nsumptio n
(réglmentaires and no n-regulato ry), water co nsumptio n, waste pro ductio n, transpo rt o ccupants. PV pro ductio n is no t
remo ved.
Em issio ni di Gas se rra in f ase di pro duzio ne e co st ruzio ne : 26 ,0 0 KgCO 2 /m 2
Durat a de ll'e dif icio : 50 ,0 0 an(s)
, cio è xx anni in uso : 0 ,0 2 an(s)
Em issio ni t o t ali di Gas se rra de ll'e dif icio : 1 775,0 0 KgCO 2 /m 2
ACV no vaEquer, 20 10 . See Eco invent base study area belo w (ACV)
Life Cycle Analysis
no vaEquer ACV basis Eco invent 20 10 . Sco pe o f Study: Manufacturing, transpo rt and dispo sal o f co nstructio n pro ducts
(building phases, reno vatio n and end o f life). Fo r the use phase co nso s energy, water, waste and trans
Im pat t o de i m at e riali da co st ruzio ne sulle e m issio ni di gas se rra : 19 0 ,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 : 9 50 0 6 6 ,0 0 kWhEP
Mat e riali e co -co m pat ibili : To limit the enviro nmental impact o f the manufacture o f building materials and pro cessing
end o f life, the design has largely favo red bio -so urced materials, minimally pro cessed and recyclable:
- Wo o den frame insulated straw bale
- earth plasters , clay walls and straw wall in mud brick
- wo o d fo r exterio r and interio r jo inery and furniture
- anhydrite screed sanded and o iled finished flo o r
Water & Indoor air quality
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
Qualit à de ll'aria int e rna : The hygro sco pic and thermal qualities o f wo o d and earth that is fo und in large quantities in
lo cal help to create a warm enviro nment. The cho ice o f natural materials, co mbined co atings with very lo w emissio ns, are
the guarantee o f perfect health air quality. Painting o f walls and ceilings: Luc'O Satin, 0 % VOC, Eco Flo wer Painting o n
wo o d: Bio ro x, VOC <5%, classificatio n A + pipes o n paint To l Prim, To l hydro shiny metals, classificatio n A +
Calculat e d t he rm al co m f o rt : Simulatio n thermique dynamique so us Pleiades+Co mfie. Objectif de limitatio n des
durées d'inco nfo rt à 40 heures o ccupées au delà de 28 °C.
// Prodotti
Timber f rame insulation straw
Pro dut t o re : Sud-Est Charpente
Co nt at t o : Ro ute de Bo nlieu 26 450 CLEON D'ANDRAN - 0 4759 0 1534
Sit o we b: http://www.sudestcharpentes.co m/
Cat e go ria de l pro do t t o : Opere strutturali / Tampo namento , Rivestimento , Tenuta
De scrizio ne :
Leaning o n the co ncrete slab o f the gro und flo o r, the building's wo o den structure co nsists o f
bearing walls and internal devices o n bo th sides o f the ro ad. These walls suppo rt the
intermediate flo o r and ro o f. The bracing is pro vided by do mestic OSB. The design has fro m the
o utset the cho ice o f prefabricatio n o f the timber frame as pedestals fo r the walls and ro o f.
Co m m e nt i:
Prefabricatio n wo rksho p, co nducted with manufacturing to o ls deskto p, ensures impro ved ergo no mics o f wo rk, greater
precisio n in the cuts and assemblies as well as better treatment o f airtightness .
earth plasters
Pro dut t o re : Jo lie Terre
Co nt at t o : Impasse des chênes – 30 36 0 Martignargues - 0 6 75529 6 58
Sit o we b: http://www.jo lieterre.fr/
Cat e go ria de l pro do t t o : Opere di finitura / Pitture e Rivestimenti murari
De scrizio ne :
The co mpany Jo lie Terre implemented o n o ur building a mix o f design, made o f earth extracted
fro m a quarry near Uzes, a hundred kilo meters fro m the site. Its co mpo sitio n: sand, clay and
plant fibers (mo stly straw) was designed to meet the needs o f sustainable pro tectio n o f straw
and implementatio n ease. Hygro thermal characteristics o f the mixture make it an excellent ally
o f building straw - indo o rs, it brings the inertia that co uld default do o therwise - o utdo o r, go o d
permeability to the diffusio n o f water vapo r facilitates breathing wall and prevents co ndensatio n
in the straw bale
Co m m e nt i:
The pro cess used is the pro jectio n that makes the efficient implementatio n time and labo r. A to tal o f 36 to ns o f this mixture
have been dispo sed o n the building. As the external and do mestic final repo rt is quite satisfacto ry fo r the o ccupants.
// Costi
Co sto di co struzio ne/ristrutturazio ne : 9 34 0 0 0 €
Construction and exploitation costs
Co st o t o t ale de ll\'e dif icio : 1 10 6 0 0 0 ,0 0 €
Sussidi f inanziari : 172 0 0 0 ,0 0 €
// Qualità della pianificazione urbana
Am bie nt e urbano : The building is lo cated within the Eco -Park Fabrègues, area still under co nstructio n, at the interface
between a residential area and a rural area. A future extensio n o f tram line allo w the direct co nnectio n o f the area fro m the
center o f Mo ntpellier.
Supe rf icie t o t ale de ll\'are a di int e rve nt o :
Supe rf icie t o t ale de ll\'e dif icio :
10 36 m 2
26 %
Num e ro di parche ggi : 19 surface parking spaces, 2 o f PMR. no t waterpro o f co ating o n the majo rity o f the surface parking.
Shade structures designed to limit the use o f air co nditio ning. Lo cal bike co ver. Charging statio ns fo r electric vehicles.
// Qualità ambientale dell'edificio
Qualit à am bie nt ale de ll\'e dif icio :
Qualità dell\'aria indo o r
Co mfo rt (visivo , o lfattivo , termico )
Efficienza energetica
Energia da fo nti rinno vabili
Pro do tti e materiali
// Concorsi
The Izuba Energies building was designed in a transverse appro ach integrating energy perfo rmance , co mfo rt and
enviro nmental perfo rmance, which wo uld co mpete in the catego ries " temperate climates and energy " and " Lo w Carbo n
". We cho se the catego ry Lo w Carbo n to highlight the selected co nstructive so lutio ns: the timber frame, insulatio n, straw and
earth plaster. These so lutio ns were fo und to respo nd with relevance to all pro ject design requirements.