pa g e 1

I N N O V a TI V e pa S SI V e C O O L I N g

h T T p:// w w w.S u p e r S u ST a I N a b L e.O r g

Le Corbusier Compared the funCtioning of buiLdings to

the maChine. Why do not Consider the CLadding of the

buiLding as a (WeLL suppLied With bLood) skin.

aLL the mamaLs use a system of bLood vesseLs to keep app-

ropriate temperature

of their bodies. maybe We Can metaboLize our buiLdings in

the Way animaLs do it.

so...Let’s imagine a buiLding With a struCture fuLL of

smaLL pores-pipes at the outer surfaCe, reguLating tem-

perature inside. eaCh hoLe WiLL be a part of a Coherent

system of ConneCted pipes.

by putting and densifying pipes on the proper side We Can

buiLd a very effeCtive system.

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I N N O V a TI V e pa S SI V e C O O L I N g

h T T p:// w w w.S u p e r S u ST a I N a b L e.O r g

is it onLy a biomimiC, futuristiC dream? not any more.

the researChers, using physiCaL LaWs, proved that this is

CompLeteLy possibLe.

to understand hoW We have to move 200 years in the past.

in 1822 fourier (the first Who forCasted green house

effeCt), presented his Work on heat fLoW, knoWn noW as

the LaW of heat ConduCtion. from his Works We knoW that

if tWo bodies With different temperatures interaCt on

eaCh others, they try to equaL their temperatures.

Comment to the draWings: the ConduCtion is betWeen to body

touChing eaCh other or inside a materiaL. When it is With

a distanCe We speak about ConveCtion and radiation. the

fourier’s LaW ConCern onLy ConduCtion.

ConCLusion: even from a Certain distanCe We Can Change

the temperature of one objeCt by using another objeCt

by radiation. in this Way We Can CooL doWn or heat up

(depending on needs).

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I N N O V a TI V e pa S SI V e C O O L I N g

h T T p:// w w w.S u p e r S u ST a I N a b L e.O r g

that is Why by the radiation of the stars We Can aChieve

Changing the temperatures of materiaLs on earth, even if

there is a distanCe betWeen them.

We Can aChieve different temperatures on different mate-

riaLs depending on exposure of the surfaCe on the stars

(f.g. sun) and CharaCteristiCs of the materiaL itseLf.

there are tWo CharaCteristiCs of every eaCh materiaL:

- absortivity (aLfa)(hoW muCh energy is CoLLeCted/foCused

by a materiaL)

- emissivity (epsiLon)(hoW muCh energy is refLeCted/

shared With the surrounding

by a materiaL)

We Can divide materiaLs on hot ones (big absortivity, LoW

emissivity) Like pLatinium, or CoLd ones-Like anod aLumi-

nium (Coprum).

there are aLready exampLes of using radiation bet-

Ween the materiaLs to baLanCe the temperatures of the

buiLdings(industriaL buiLdings).

saLmaan Craig, the researCher from bruneL university in

uk,studied many exampLes and shapes, WhiCh WiLL heLp to

reguLate the temperature.

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I N N O V a TI V e pa S SI V e C O O L I N g

h T T p:// w w w.S u p e r S u ST a I N a b L e.O r g

he Come to the ConCLusion that if he make an atrium in

this shape(Cone shape-draWing), air, WhiCh is going doWn

through the roof, WiLL CooL doWn the atrium, before it

reaCh the end of the sLoping roof. hoWever, the roof

must be made of a CooLant-the materiaL reaLtiveLy CoLd

(Compering to the surrounding air), due to the sun/stars

radiation.

foLLoWing the exampLe above, saLmaan Craig, in his

design, Choosed a Cone as the most effeCtive shape.

hoWever to CooL doWn the buiLding, the most effeCtive

WiLL be not a big Cone but feW smaLL onCes, situated

around, in the skin of the buiLding, and ConneCted to

eaCh other into a Coherent system.

in the pLaCes When you need them more you WiLL find them

more

the system of pipes WiLL Work a bit Like bLood vesseLs in

the eLephant’s ear:CumuLated very CLose to skin Where it

is the most effiCient to CooL doWn. and LaCk of them at

the parts Where supposed to be Warm(the skin of the ears

is thin and ears Can move and ventiLate easiLy). saLmaan

Craig CaLLed this system biotriz.

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I N N O V a TI V e pa S SI V e C O O L I N g

h T T p:// w w w.S u p e r S u ST a I N a b L e.O r g

this teChnoLogiCaL soLution Was tested on jean nouveL’s

projeCt:Louvre abu dhabi. it is estimated that the ther-

maL mass in the biomimetiC roof WouLd remain on aver-

age 4.5°C CooLer than in a standard roof over a year in

riyadh, saudi arabia.

to sum up: biotriz is the system of pipes, CooLing doWn

the buiLding, situated inside the CLadding of the buiL-

ing, CLose to its externaL surfaCe,

positionned in the pLaCes Where is the most effiCient

(regarding environment Condition of the LoCation).

more about the projeCt:

http://WWW.LibsearCh.Com/vieW/15830

http://WWW.inventive-design.net/Component/option,Com _

jombib/task,shoWbib/id,713/

http://WWW.sCienCedireCt.Com/sCienCe/artiCLe/pii/

s1672652908600074

bruneL university arChives

http://bura.bruneL.aC.uk/handLe/2438/3315

biotriz for the jean nouveL projeCt Louvre abu dhabi

http://WWW.fabriCate2011.org/128/