Double Glass Wall Ventilated Façade Office Building with Double
Skin Glazed Curtain Wall
1. Surface Finished: PVDF Cotaed/Power Coating/Anodizing
2. Available Glass: Low-E/Reflective/Floated/Coated
3. Aluminium Thickness: 1.4-2.5mm
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Double-skin facade systems and its categories illustrates narrow
fully sealed assemblies of systems which includes operable external
louvers or shading devices. They all possess an inner and outer
layer or glazed skin.
For a period of time now the use of DSF have increased due to their
relevant usage and profit with respect to their possession of
increased energy efficiency and daylighting improvement.
The paper will focus on the evaluation of Double-skin façade system
for sustainable development in different climatic zones. An
overview of the DSF literature illustrating the different types of
double skin façade was carried, case studies of different DSF types
was carried in different buildings in different locations namely;
Eurotheum Frankfurt Germany, Seattle America and the Aurora Place,
Then analysis from the finding and discussions yield out the
possible recommendations derived from the basic benefits and
advantages of the DSF which includes; reduce heating demand,
providing views, control solar gain, thermal, insulation, enhanced
security, allowing natural ventilation, serves as pollution
barrier, reduced artificial lightening m-Increased building life
span, improve occupants comfort, future proofing, providing
emergency egress, acoustic protection etc.
Then its disadvantages mainly is the initial cost of construction
and space consumption. Therefore possible recommendation entailing
the proper studying of different climatic zones in which the
preferred DSF will be used was suggested so as to enhance further
research and the technological advancement of the use of the DSF
which was the concluding view point.
TWIN FACE DSF SYSTEM:
This consist of conventional curtain or thermal mass wall system
inside a single glazed building skin. The outer glass may be safety
or laminated glass or insulating glass. Shading devices may be
included. This system must have an interior space of at least
500mm-600mm to permit cleansing.
It has an opening for allowing natural ventilation in the twin
faced DSF which distinguishes it from the buffer and extract air
DSF system. The outer skin is used for protecting air cavity
contents (shading device), whereas the internal skin provides
insulation for minimizing heat loss.
BUFFER DSF SYSTEM:
These predate insulating glass invented to maintain daylight into
buildings while increasing sound and insulating properties of the
wall system. They use two layers of single glazing spaced
250mm-900mm apart, sealed and allowing fresh air into the building
through a controlled means of either a HVAC system or box type
window which cut through the overall double skin with shading
devices included in the cavity. The picture below shows an example
of a buffer DSF system.
EXTRACT AIR DSF SYSTEM:
This comprised of a second layer of glazing placed on the interior
of a main façade of double glazing (thermopane units) which makes
the air space between the two layers of glazing to become part of
the HVAC system.
The heated used air between the glazed layers extracted through the
cavity with the use of fans, which tempers the inner layer of the
glazing while the outer layer of insulating glass minimizes
heat-transmission loss. Also fresh air is supplied by HVAC which
precludes natural ventilation.
Shading devices are also mounted on the cavity with air spacing
between the layers of glasses with the range of spacing between
150mm-900mm.This system is usually used in location where natural
ventilation is not possible or places with high noise, wind, fumes
etc. The picture below shows and example of an extract air DSF.
Double Skin Façade (DSF) system glass curtain wall is employed
increasingly in high profile buildings, designed by famous
Architects, using acclaimed engineering consultants, and being
touted as an exemplary “green” building strategy. It is a new
technology that is more often found in high-end European and
Pacific Rim area buildings. For the majority of mainstream
architects, double skin technology remains elusive. From
perspectives of both knowledge and budget, double skin systems are
often beyond the scope of most commercially driven projects.
The question arises as to whether or not double skin buildings
truly are more environmentally responsible and sustainable. Is the
commercial architecture missing out on potential energy and
environmental savings? The Double Skin Façade is based on the
notion of exterior walls that respond dynamically to varying
ambient conditions, and that can incorporate a range of integrated
sun-shading, natural ventilation, and thermal insulation devices or
Early modern architects in the window design of the different
projects explored this new building technology. Early solar passive
design exemplified in the "trombe" wall, is also viewed as a
precursor to modern double skin systems Only recently has double
skin technology become analogous with explorations in transparent
and glass architecture, and moreover, acclaimed as environmentally
"responsible" design. This paper represents the findings of a team
of upper level B.Arch. and Masters students who have conducted an
initial investigation into double skin cladding systems.
|Length||2m or as per customer's requirement|
|Width||1m or as per customer’s requirement|
|Height||40mm or as per customer’s requirement|
Although the Double Skin Façade concept is not new, there is a
growing tendency from the architects to put it into practice. Its
complexity and adaptability to different climatic conditions
increase the need for careful design. Since the construction types
can differ from one location to another, it is obvious that the
comparison of different literature sources is not always relevant.
Since the concept of Double Skin Facades is complicated and its use
and function affects different parameters of the building, the
literature studied is from different fields.
It is clear that the design of the system is crucial for the
performance of the building. It is the opinion of the author that
the Double Skin Facades can provide both improved indoor climate
and reduced use of energy in the same time if designed properly. If
the approach is overall and the goals to be achieved are clear,
then the mentioned system is flexible enough to meet climatic
changes for most types of building use.
The classification of the Double Skin Facades is important since
the initial approach can influence the design stage. After
selecting the type of Double Façade appropriate for the building,
it is necessary to define the design and the technical parameters
(such as the materials used) that can influence the function and
the performance of the system and the physical properties of the
cavity. The accuracy of calculations of the façade performance in
the design stage will lead to more precise predictions. It is clear
that by prioritizing the main goals of the double façade system in
different ways, the building design and construction can differ
adapting to the performance requirements of the designers, and the
needs of the users. The advantages and disadvantages of double skin
façades found in different literature sources are mentioned and
Furthermore, examples of office buildings with Double Skin Façades
are presented. Double Skin Façades 14 Finally a discussion and
conclusions section follows in which the point of view of the
author is given and comments are made. Fields of further research
an development needed are presented.