ETFE Membrane Facade ダブルスキンファサード by Petr Franta is a highly esteemed winner of the very prestigious 2022 A' Design Award 銅賞 in 建築・建物・構造物デザイン Competition Category.
銅建築· 2022
ETFE Membrane Facade ダブルスキンファサード
by Petr Franta
Client: Ctu
A' Design Award 銅賞 Winner in 建築 Category
Verified Award Winner
Verify Award Status for #134989The Design
About ETFE Membrane Facade ダブルスキンファサード
ETFEメンブレンファサードは、研究・教育棟のために設計されたダブルスキンファサードである。外皮は、幅3メートル、長さ最大62メートルのエチレンテトラフルオロエチレン製の透明なクッションを溶着して構成され、常時一定の空気圧で保持されながら、アルミニウム製クランプによって二次鉄骨構造上に斜めに設置されている。ファサードの空気層はソーラーコレクターとして機能し、暖められた空気は換気ユニットへ取り込まれることで、エネルギー消費を最大30パーセント削減する。メンブレンは雨水によって洗浄され、さらに街路の交通騒音に対する遮音性能も付加している。
The Recognition
About the A' Design Award 銅賞
ETFE Membrane Facade ダブルスキンファサードは、創造性、独創性、鋭い洞察力で際立つ傑出したデザインに授与される、高い権威をもつ評価である A' Design Award 銅賞の受賞作品です。銅賞の受賞作品は、十分に巧みで印象的なほど創造的な工芸品であり、デザイナーの豊富な経験、想像力、機知を裏づけています。ETFE Membrane Facade ダブルスキンファサードは、高く評価され、称賛され、愛される品であり、顕著にプロフェッショナルで革新的であることが期待されます。この A' Design Award 銅賞を受賞したデザインは、芸術・科学・デザイン・技術のベストプラクティスを取り入れており、細部への配慮に優れています。ETFE Membrane Facade ダブルスキンファサードは、ニーズを見事に満たし、欲求に触れ、感情を魅了し、好奇心を引きつけます。
Behind the Design
Press Kit
Credits, team members and technical details provided by the designer.
- Unique Properties
- Applying Double Skin Facade with ETFE Ethylen Tetrafluor Ethylen transparent membrane assembly for energy saving up to 30 percent. Acting as solar collector with recuperation of hot air on the top floors in winter season.
Additional acoustic protection on busy traffic streetscape.
Aesthetics, added value as large span between structural members.
Self cleaning exterior of the facade ETFE membrane with additive chemical component rejecting dirt as automatic cleaning of the facade with rain water. - Dimensions & Packaging
- Pneumatic ETFE membrane cushions are 3 m wide and up to 62 m long, installed diagonally and kept under constant air pressure 300 Pa.
Cushions are anchored on secondary structural steel system with aluminium extrusion clamps structurally designed for wind load.
Acoustical properties in combination with triple glazing system 47 dB adds 10 dB to 57 dB in composite calculation.
Area of ETFE membrane facade is divided in two parts 1294 m2 and 570 m2.
Height of facade 20 m. Length of facade is 68 and 30 m. - Tags
- ETFE, Ethylen TetraFluor Ethylen membrane, Double skin pneumatic facade,
- Production Technology
- 3 m wide ETFE Ethylen Tetrafluor Ethylen cushions in south and west facade with seam in aluminium profiles on the secondary steel structure are welded cushions and kept under constant air pressure 300 Pa.
Weight is 1% of glass installation of outer skin.
Recuperation of hot air from facade as solar collector, energy saving up to 30%.
Self cleaning exterior ETFE membrane with additive chemical component rejecting dirt cleaning of the facade with rain water.
ETFE 50-years lifespan of the material. - Design Challenge
- Turning of the corner of diagonally placed pneumatic cushion of ETFE membrane detail in double skin facade.
Special aluminium extrusion detail was developed (with live size models) especially for this project to allow the twisting diagonal clamp with 1000 mm radius, placed on secondary steel tubing. We had to comply with European standards DIN different for aluminium and steel. Large mock-ups, samples and models were part of the design process to make sure that the membrane does not wrinkle. - Research
- Design research was very complex with scientists, structure engineers in applications ETFE membrane around the world (London, Munich, New York) - design datas with manufacturers, designers.
We searched design and structural properties of Ethylen TetraFluor Ethylen transparent membrane facades for building types use, duration in life span, wind load on pneumatic cushions, aluminium clamps detailing, secondary steel structure detailing, transparency properties, weight, width versus span dimensions. - Inspiration
- Presentation of 8 x 6 m sample of ETFE membrane cushion with pneumatic equipment for Allianz Arena in Munich by Herzog De Meuron Architects. It was used for football stadium, in England for museum in Leicester by Nicolas Grimshaw and other non transparent use. After researching those study cases around the world, later came to me the idea to use transparent double skin membrane for office type building for scientists, using transparent film membrane in double skin facade instead of glass.
- Project Duration
- Project design started in 2008 in Prague with presentation to Technical university scientists committee.
Realized in years from 2015 to 2017 on Czech Technical University in Prague campus for Czech Institute of Informatics, Robotics and Cybernetics of the CTU in Prague. - Operation Flow
- Applying double skin facade with ETFE membrane assembly for energy saving with recuperation of hot air on the top floors, saves 30 percent of an energy consumption.
From double facade acting as solar collector hot outside air is sucked into the ventilation HVAC units on each floor from two places - from south facade for the winter and transition period and from the north facade in the summer. (Solar collector - double facade between the glass facade and the outer facade of the ETFE facing south). - Patents
- Design of pneumatic cushions fasade with ETFE Ethylen TetraFluor Ethylen trademark Taiyo Europe.
- Team Members
- Architect: Petr Franta
Architect: Stepan Sekera
Architect: Petr Sobotka - Image Credits
- Image #1 Photographer Jiří Ryzsavy
Image #2 Photographer Jiří Ryzsavy
Image #3 Photographer Jiří Ryzsavy
Image #4 Photographer Jiří Ryzsavy
Image #5 Photographer Jiří Ryzsavy
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