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某电子安全系统制造厂想要在马德里东北的阿尔卡拉·德·埃纳雷斯建一座具有独特生物气候的新总部。西班牙马德里建筑师Alarcon Asociados,提出一个形式与气候功能相辅相成的设计。客户大胆接受了建筑师标新立异的设计。

A manufacturer of electronic security systems wanted a “unique and bioclimatic” building for its new headquarters in Alcalá de Henares northeast of Madrid. Alarcon Asociados came up with a design in which (expressive) form and (climatic) function work hand in hand. That the client is also the owner of the building might explain their boldness in endorsing such an unconventional design.

建筑顶部长距离悬挑的红色现浇混凝土楼板减少了90%的不必要阳光射入，使得建筑不需要安装百叶窗。此外在建筑中安装了建筑师自主研发的HOLEDECK 集成地板系统，这个系统的引入使得建筑不需要吊顶，因此每层可以多出50厘米的高度。此外建筑结构可以大跨度，实现每层1000平方米的自由安置办公空间。外立面50%为不透明，表皮外观是覆盖金色电镀铝合金的橡木板。

暖通系统主要安置在地板系统中，部分深埋地下的空气循环系统使得建筑温度恒定，无需额外的空调系统，此外屋顶上的太阳能集热器可以收集热量为建筑加热（配置了一个备用的燃气锅炉）。整个建筑的照明能耗比传统方式降低40%。

Towards the top of the building, the red coloured in-situ concrete slabs cantilever increasingly farther out. They reduce the direct solar gain on the facade by about 90 %, making movable blinds unnecessary. In this building for the first time the architects used a self-developed HOLEDECK floor system with integrated hollow spaces in which all building services could be routed. That saves around 50 cm of building height per floor, because suspended ceilings were not needed. With their enormous spans of 12 metres between the piers and their almost complete symmetry, which is only disturbed by the outdoor stairs on the southwest facade, the 1000 m² office floors can be arranged without restrictions. The stick system facades made of timber have a glazed percentage of 50% and opaque spandrel panels with 100 mm mineral wool insulation. On the exterior, these are faced with 0,8 mm gold-coloured anodized aluminium and on the interior with oak panelling.

Particular to this building are the diagonal buttresses on its centre lines and corners which continue upwards in powerful piers with V-shaped cross-sections. All vertical air ducts, as well as the heat exchangers for the intake and exhaust ventilation, are contained within these structures, which Alarcon Asociados call the “noses” of the building. The intake air is drawn in from above the roof, then sent underground through eight earth pipes (one per pier, each 180 metres long) and finally back through the piers to the office levels. The exhaust air also flows through the piers and then out over the roof. Due to the preconditioning of the air and the automatic nightly cross ventilation, no conventional air conditioning system was needed. To heat the rooms, the concrete floor slabs can be thermally activated by means of inlaid piping. Heat is mainly provided by solar collectors on the roof, with a gas boiler serving as back-up system.

The architects calculate that the building consumes 40% less energy for illumination than a conventional building. The absence of moveable blinds and the shading provided by the cantilevering concrete floors, they say, should help minimise the use of electric light during daytime.

Artificial lighting is provided exclusively by LED-luminaires with a basic lighting of 200 lux, but the brightness can be increased directly at workspaces to 500 lux if needed.

Project: R+D Headquarters for LOGYTEL
Architects: Alarcón + Asociados
Location: Avda. Punto Es, 4. 28805 Alcalá de Henares, Madrid, Spain
Associated Architect: Cristina Álvarez
Project Year: 2012
Photographs: Pablo Cruz, Luis García Craus, Courtesy of Alarcón + Asociados
Project Area: 4,700 sqm
Collaborator: Sara Rojo, Pablo Cruz, Carlos Tomas
Quantity Surveyor: Jose María Rife Beltrán
Structural Engineer: Jorge Conde, IDEEE
Services Surveyor: Manuel Aranda
Client: Logytel

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