Sustainable Arq
Transcript of Sustainable Arq
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Pablo Cabrejas Benito
SUSTAINABLE ARQUITECTURE
NATIONAL ASSEMBLY FOR WALES Richard Rogers
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THE PROJECT
In 1998 a design competition wasopenness and democracy itself; ope
is situated in the Cardiff Bay areaMillennium Centre. This area wascomplete the puzzle of developmeto meet the following stipulations.
Complete accessibility. Sustainability and renewable sour A minimum 100-year life span. Using Welsh materials.
The architect developed an idea for
had to be a transparent envelope,Assembly and encouraging the pudemocracy: Openness, transparenc
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held for building the National Assembly for Wales. The bnness for the surroundings and citizens themselves. It was
, close to the Victorian Grade I listed Pier head Buildinone the center of the coal exporting trade and the net in the immediate vicinity. According to the competition,
ces of energy.
a building that would connect with Cardiff Bay, Wales and
looking outwards to Cardiff Bay, providing visibility to theblic to engage with it. Again the main issue was to hiand participation.
Architecturally this is achieved byassembly members under the public,public part is elevated on a slate-clareinforces their importance in the demoDebating Chamber its not only situated
public, but its also in the physical andthe building. The roof, undulated, fallsDebating Chamber, creating a special snatural way of ventilation. The opennefor is represented in the transparencythat surrounds all the building. Theyissues, but without forgetting moreproject, as a public project, needed to h
This is the reason prefabricationoptimized. In addition, they used manarea, such us timber and slate sandston
challenging marine environment for a rleast 100 years.
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ilding had to expressfinished in 2006 and
and the new Walesconstruction had tothe building also had
beyond. The building
inner workings of theghlight the values of
placing the electedthe electorate. Thisplinth. This way it
cratic system. But thein a level below the
etaphorical center oflike a bell over theource of light and ass they were lookingrovided by the glasstook care of designphysical things. Theve a controlled price.as maximized and
materials from the, that could resist the
asonable price for at
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The design studied sustainabilityreasonable design answers to prconditioning is supplied in the debaare naturally ventilated. Heat exch
while the thermal mass of the plint
The Assembly program is quite cooffices for the principal officers of t
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part from the installation of technological devices. Itblems that do not imply higher costs, the design itsing chamber by the wind cowl over it, and all the other spngers use the potential of the ground to save energy in thtempers fluctuations in the internal environment.
mplex, and includes education spaces, a caf, meeting re Assembly, a members lounge and much more we can c
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orks because It haslf solves them. Air-
aces (the public ones)e cooling mechanism,
ooms, press facilities,eck in the sections.
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SUSTAINABILITY
The building was awarded the BRenergy demand; applying renewa
residual energy demand. So that,light and ventilation among other r
ILLUMINATION
The same philosophy for the whole
1. Maximum use of natural light2. Use energy saving light sources3. Using control systems to the inte
Roof lights and customized roof veinto the space, assisting daylightlantern has been installed on the da series of concentric aluminum rin
A conical mirror suspended under tinto the chamber. The mirrored conto the need of daylight levels and r
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EAM excellent rating for its environmental strategy bble energy sources and using energy efficient sources
he Assembly includes boreholes, greywater recycling, extsources we will classify and study in detail.
building was applied to enlightenment, based on three prin
ration of natural and artificial lighting.
ntilators serving the committee rooms / offices reflect lopenetration. To permit natural daylight into the debatinomed roof beneath the wind cowl. Daylight is reflected ints which make up the debating chamber funnel.
e wind cowl has been installed to reflect daylight from lowcan be manually raised and lowered into the throat of th
duce the possibility of glare.
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ased on reducing thend systems to cover
ensive use of natural
ciples:
-level winter daylightg chamber, a glazedo the space below via
altitude winter sunfunnel to respond
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Regarding the artificial lighting, e
Therefore, and as close as possible
chosen CDM metal halide lamps wit
4200 K. the result is a chamber il
projectors introduced at the base oring immediately above. Also oth
above, between the tubes to illumi
In addition, in the perimeter of
fluorescent lamps. We can observe
rings of lamps in the image.
With this combination of natura
workspace is enhanced, while it gi
broadcasting.
VENTILATION
The whole building is naturally vendebating chamber, committee roomventilation to the debating chamballowing air to be drawn out of thSHUNT. The inspiration comes frothrough the hop-drying kilns. With
from all offices and functional area
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bedding luminaries were chosen.
to the color of natural light, have
h a color temperature higher than
luminated by a single ring of 80
the vent pipe; with an aluminumr projectors have been installed
nate the surface of the vent pipe.
he chamber have been installed
his zenithal light and the different
l and artificial light, the public
ves facilities for TV recording and
tilated, although a mixed mode system can be used to as and public galleries its required. A six-meters-high rotatir. It rotates to produce a negative pressure on the leechamber, as it is explained in the drawing, working astraditional oast houses, which used self-orientating wi
this design complementing the global one, air conditionin
.
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sist ventilation in theng wind cowl providesard side of the cowl,some kind of perfectnd cowls to draw air
has been eliminated
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HEATING / COOLING SYSTEM
There are two remarkable heatingcolor, absorbs solar radiation andallows the entrance of solar light
entrance of light if necessary.
Furthermore, the Assembly countsstability to reduce primary energconventional chillers. This system isand low grade heat, which is requir
To reduce CO2 emissions even mo
green energy can maintain high grwithin air-handling units.
WATER
Potable water usage is minimized tis storage in a tank. This amount oand maintenance. Other adjustmeand fittings in the everyday consum
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-design points in this building. The clad plinth, with its mregulates thermal fluctuations in the inner space. In addiallowing some greenhouse effect. Nevertheless, this fa
with a ground source heat pump (GSHP) system, that uconsumption The GSHP system increases operation ef
enough to provide cooling for mixed mode spaces and tecd for the under-floor heating system.
re, there is also a biomass boiler processing both wood c
ade heating to heat emitters (low-level natural ventilators
hrough utilization of rainwater. Rainwater collected fromwater is enough for lavatories, irrigation for landscapingts and water reducing are achieved by the application oe.
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assivity and its blackion, the glass faade
ade can regulate the
ses grounds thermalficiency compared tonical computer suites
hips and pellets. This
and heater batteries
he large roof canopyand general cleaningappropriate fixtures