Light construction, efficient operation

The HiLo unit sits on the top platform of the NEST research and innovation building on the Empa campus in Dubendorf, Switzerland.
(c) Roman Keller / Empa

Boasting an intricate, doubly curved concrete roof, lightweight funicular floors, and self-learning building technology, the latest addition to Empa and Eawag’s NEST research building in Duebendorf, Switzerland officially opened today. The innovative unit illustrates nearly a decade of formative ETH Zurich research in architecture and sustainable technologies.

The unit’s striking roof derives its load-bearing capacity from its highly curved geometry. The roof was built using a flexible formwork consisting of a tensioned cable net covered with a thin membrane onto which the concrete was sprayed.
(c) Roman Keller / Empa

HiLo, the latest NEST unit, combines medieval building principles with futuristic construction methods: the two-storey building module with its striking, doubly curved concrete roof and novel, lightweight funicular floor system was inspired by construction methods of the past, and planned and built using state-of-the-art computational design and fabrication techniques. In the new unit, a team of scientists led by Philippe Block, Professor of Architecture and Structures, and Arno Schlueter, Professor of Architecture and Building Systems together with industrial partners explored how lightweight structures and efficient construction methods can be combined with intelligent and adaptive building systems to reduce both embodied and operational emissions in the construction and building industry.

Resource-efficient concrete structures

The unit’s striking roof derives its load-bearing capacity from its highly curved geometry combined with a concrete sandwich structure, made of two thin layers of reinforced concrete connected by a grid of concrete ribs and steel anchors. To save large amounts of formwork material, the roof was built using a flexible formwork consisting of a tensioned cablenet covered with a thin membrane onto which the concrete was sprayed.

For the mezzanine floors of the two-storey unit, the researchers primarily aimed to use as little material as possible in the structure itself. By using a rib-stiffened funicular shell instead of a flat plate, HiLo’s lightweight funicular system uses over 70 percent less material than conventional floor slabs in reinforced concrete. Furthermore, digital production methods allowed the integration of ventilation, cooling, and low temperature heating systems into the floor structure for an even greater reduction in materials and volume.

Learning building technology

The HiLo unit is also equipped with an adaptive solar façade developed by Schlueter’s group. It consists of 30 photovoltaic modules that can be aligned with the sun. The flexible modules can also be used to control how sunlight enters the room in order to passively heat it or reduce cooling requirements.

The adaptive solar façade is one of a series of innovative building technology components designed for efficient indoor climate regulation. During operation, the researchers consistently optimised the interplay of the individual technologies using machine learning and considering the users, in order to investigate how comfortable indoor conditions can be achieved with as little energy and emissions as possible.

Research and industry learn from each other

HiLo stands for “high performance – low emissions”. The unit allows researchers to test how the construction and operation of buildings can be designed to be as energy- and resource-efficient as possible, while at the same time ensuring an attractive architectural space and a high level of comfort.

HiLo is the eighth module in the experimental NEST building on the campus of the two research institutions Empa and Eawag in Duebendorf, Switzerland (just outside of Zurich). In the modular research and innovation building, scientists and industry partners can test and advance new building and energy technologies in temporary building modules or units and under “real-life” conditions.

Wissenschaftliche Ansprechpartner:

Peter Richner
Empa, Deputy CEO / Head of the Department of Engineering Sciences

Philippe Block
ETH Zurich, Block Research Group

Architecture and Building Systems A/S
Alessandra Gabaglio, Communications
Press contacts
Stephan Kaelin
Empa, Communications
Tel. +41 58 765 49 93

Vanessa Bleich
ETH Zurich, Corporate Communications
Tel. +41 44 632 41 41

Weitere Informationen: Empa media release Virtual tour

Media Contact

Rainer Klose Kommunikation
Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All latest news from the category: Architecture and Construction

Back to home

Comments (0)

Write a comment

Newest articles

Frequency translating add/drop filters designed for on-chip light manipulation

New filters could benefit data communication, quantum information processing and optical neural networks. Researchers report the development of frequency translating add/drop filters based on electro-optically modulated photonic molecules. The new…

How a bacterium may help solve the plastic pollution crisis

Researchers from Nara Institute of Science and Technology find that the bacterium Ideonella sakaiensis can not only degrade petroleum-based plastics but can also sustainably produce biodegradable plastics. Plastic pollution is…

New technique paves the way for perfect perovskites

Next-gen solar material could outshine other solar cells. An exciting new solar material called organic-inorganic halide perovskites could one day help the U.S. achieve its solar ambitions and decarbonize the…

Partners & Sponsors