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Further information


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But feel free to look around before you return to the Christmas tree. There is much to discover here.


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3D microstructures for light and heat redirection


The windows in the living room are divided into two separate areas. Above is the daylighting section, dedicated to light comfort. Below is the view section, dedicated to the outside view.
The daylight area stands out slightly from the rest of the façade to benefit from higher solar elevation angles. A new type of glazing with integrated millimetric lamellas, invisible to the human eye, directs more daylight into the rooms. The sunlight is thus redirected directly to the ceiling. This redirection leads to more uniform illumination of workplaces and reduces the risk of glare. Depending on the position of the sun during the year, the solar heat gains can also be changed: High gains in winter reduce the heating load, lower solar gains in summer reduce the risk of overheating and the cooling demand.


EPFL-LESO and BASF researchers are working to improve the technology of this micro structured glass.


Further information
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Active façade for solar energy production


The PV modules on the south side and the solar thermal collectors on the east side form an active façade for solar energy production. The goal is that the energy produced by the PV modules meets the unit's electricity needs, including artificial lighting and electronic equipment. The amount of energy produced by the solar thermal collectors is expected to cover the annual heating and hot water needs of two people. Excess energy is fed into the Energy Hub (ehub) in the backbone of the NEST building to meet the energy needs of other units.
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Aesthetics through wood-glass bonding


From the outside, the wooden frames of the windows are not visible. The reason for that is that the frame is covered by a pane of structural tempered glass, glued on the wooden frame itself. This gives those so-called Pollux windows a smooth appearance and at the same time avoids thermal bridges between the glass and the frame that would produce undesired heat dispersion. The windows incorporate various technical innovations thanks to the research activities of the company tz menuiserie sa.
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Blinds for light control


In the working area, there are blinds with sinusoidal lamellas. Due to their curved shape, they direct the incident light rays to the ceiling. This creates a particularly pleasant ambiance for the users. In normal operation, these blinds are controlled by a weather station on the roof of the unit. In research mode, however, they are controlled together with the lighting system using data from the HDR Vision sensors installed at each workstation.


Further information








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Cardboard furniture


The furniture is made of cardboard, a lightweight and easily recyclable material with embodied energy and carbon footprint that meets the unit's goals. The sofa, the armchairs, and the coffee tables are composed of multiple cardboard layers assembled together in a more solid compound with a hydro-repellent colored protection. Micro-foldings between the layers prevent unaesthetic deformations due to people sitting.
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Colored glazing for PV


From the outside, the façade of SolAce looks like a homogeneous green-blue crystal that glows differently depending on meteorological conditions. Special colored glazing for PV modules and solar thermal collectors was used for this purpose. This emerged from an EPFL-LESO patent and is based on multilayer nano-thin films. The color effect is created by reflection, while 90%-95% of the solar radiation is still transmitted. The glazing guarantees architects a very uniform appearance – and that even for façades that incorporate a wide variety of technologies for generating solar energy.
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Combined living and working area


One of the goals of the unit is to provide a flexible space that can be adapted to the different activities of the residents, i.e. daily individual work, meetings, living, etc. In this way, innovative social models and lifestyles such as "home working" are encouraged. The separation of the living area and the working area is made by the terrace of the unit. The work area is equipped with modular tables that can be connected to form a meeting layout. Numerous cabinets, with acoustic panels facing the room, provide ample storage space.
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Dynamic & circadian LED lighting


The lighting in the SolAce workspace is dimmable and the color temperature can be changed. The aim is to use dynamic lighting patterns to regulate the circadian rhythms of users and thereby achieve an improvement in visual and cognitive performance. The unit's dynamic lighting system is based on state-of-the-art knowledge of the non-visual effects (NIF) of light on humans. The positive effects of lighting on office workers will be further researched within the unit.


Further information
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Foldable furniture made of cardboard


The furniture is made of cardboard, a lightweight and easily recyclable material with a low gray energy and carbon footprint that meets the Unit's goals. The table and chairs are made of a single layer and can be folded when needed.







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Glare detection and prevention sensor


At the workstations, a High Dynamic Range (HDR) vision sensor is installed on the back of the PC screen. This sensor, prototyped by the CSEM (Centre Suisse d'Electronique et de Microtechnique), is modified, calibrated and programmed at EPFL to perceive incident light similar to the human eye. The captured images are processed by the integrated microprocessor and a "glare index" is calculated from them, indicating how much glare the users are exposed to. Finally, with the help of the unit's building automation system, the external blinds and electric lighting are controlled to avoid disturbing glare for the users.
In the next step, EPFL researchers will set up and evaluate a shading control algorithm that finds a compromise between the visual comfort of different office users.


Further information


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Glazing with a hidden message


A special feature of the glazing used for the façade is demonstrated by the balcony parapet. The panels are made of the same special glass. Here, however, it has a white color. The reason for that is that all visible bandwidths of the light passing through the glass combine to form an additive color mixture and return color that is nearly white. In the case of the black stripes, however, all visible bandwidths are absorbed by the black tint except the one corresponding to the outside color (blue/green) and that are reflected back to the environment. This gives the blue colored sensation perceived from the outside in This is how the blue color perceived from the outside is achieved in the places where the black stripes are applied. By the way: The stripes are a 128 bit code and mean "SolAce".
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Hoch- & Tiefgestellte Zeichen



Hochgestellt:


⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹


⁺ ⁻ ⁼ ⁽ ⁾ ⁱ ⁿ


Tiefgestellt:


CO₂,


₀₁₂₃₄₅₆₇₈₉


₊ ₋ ₌ ₍ ₎
ₐ ₑ ₒ ₓ ₔ ₕ ₖ ₗ ₘ ₙ ₚ ₛ ₜ



Liste unter: https://de.wikipedia.org/wiki/Unicodeblock_Hoch-_und_tiefgestellte_Zeichen








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Keep embodied energy low


The architectural design of SolAce relies on building materials with low carbon footprint and little embodied energy - that is, non-renewable energy needed for the entire process of prefabrication, construction and disassembly. For example, the entire unit consists of multiple prefabricated wood panels fully insulated with cellulose wool. Timber consumes less embodied energy than a solid concrete structure and a timber façade structure up to 10 times less than one made of metal. For the same reason, the entire floor is covered with an eco-linoleum made of cork and linseed oil, poured in the liquid state to avoid unsightly joints. The choice of furniture, made of cardboard, has also been made to keep the embodied energy as low as possible.
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Laser-treated selective glazing


Today's s highly-insulated glasses offer a very good insulation effect. The problem is that the coating of the glasses normally blocks the telecommunication signals. Selective glazing simultaneously achieves high thermal insulation and transmission of microwaves from mobile phones and other telecommunications signals. The glasses of the view section in the living room have a fine lattice structure - micrometer-wide cuts of a laser treatment. At the same time, the selective glazing achieves high thermal insulation. The glazing is therefore suitable for applications at both warm and cold temperatures. EPFL-LESO’s innovation is already implemented in some Swiss trains where signal issues are more frequent and this is the first building application.


Further information
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Making the most of solar energy


As the name "SolAce" suggests, the sun is at the center of many of the technologies implemented in this unit. It has been proven that light has a great influence on the way people live and work. This unit aims to make the most of the sun's rays while meeting the highest standards of comfort by creating the greatest possible connection to the outside world and nature. In order to maximize the amount of daylight entering the unit, the transparent glass area therefore accounts for more than 50% of the total south façade area, which is about twice as much as an average building.
In addition to comfort, the focus lies also on energy balance. To ensure that this is positive throughout the year, electricity and hot water are produced directly by the façade.
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Project: Model Predictive Control for thermal and visual comfort


Reducing the energy consumption in buildings and simultaneously satisfying the comfort needs of occupants is an important and challenging problem. The comfort of occupants depends on several factors including thermal and visual conditions. The energy consumed in buildings is mainly dedicated to heating, cooling, lighting and air conditioning. While the solar radiation is a source of free energy, it can induce visual discomfort. To overcome these challenges it is necessary to incorporate advanced modelling and control techniques in building energy systems. The ehub-Team aims at developing such solutions based on Model Predictive Control.
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Sailboat beds


The bedroom had to be compact to preserve the highest floor space as possible. This clever solution of overlaying two beds by keeping a wood subdivision for privacy has been tailor-made by the carpenter. It is kind of an advanced bunk bed, inspired from sailboats.
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SolAce: Harvesting sunlight


SolAce reconciles two needs: maximum energy generation at the façade and optimum comfort for residents inside the unit. The aim is to achieve a positive energy balance throughout the year – without a rooftop providing energy gains.
Solar cells and solar thermal collectors with colored glazing are built into the façade. An innovative micro-structured glazing of the windows and an intelligent building automation system provide for an optimal distribution of daylight and solar warming in the unit during winter. During summer, however, the very same technology prevents the unit from overheating.


Use: combined working and living environment


Opening: September 2018


Partners: EPFL, Geberit AG, V-ZUG AG, ABB, BASF, Duscholux AG, Griesser AG, Lutz Architects, Regent Lighting, Solstis SA, SwissINSO, TZ menuisierie SA


Website SolAce
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