Water cooled buildings in Singapore

A European team has developed the 3for2 concept in the tropical Singapore. It envisages to cool buildings with water instead of air. This should help to achieve the ambitious saving of the City State. In Singapore the air conditioning accounted for around 60% of the energy consumption in houses.

An unconventional office building now is officially inaugurated and belongs to the most energy-efficient in the tropical Singapore. The measurements have revealed that in the first few weeks. In addition, that could be realized in the same room, which are usually two floors, three floors. 3for2 is the concept is developed by researchers from the Swiss Federal Institute of Technology (ETH) Zurich and the Siemens building technologies Division. In the next two years, great office space in the United World College South East Asia serves the 520 m2 as a laboratory for design optimization.

Flat coil instead of thick pipes

Typically, building are air-conditioned with cold air. This requires pipes with large cross section, which require up to one third of the volume of a floor. The developers of the 3for2 concept attached instead flat cooling coils on the ceiling, which flows through centrally generated cold water.

Water cooled buildings in Singapore
The building looks, which was built after the 3for2 concept. In the next two years, great office space in the United World College South East Asia serves the 520 m2 as a laboratory for design optimization. Photo: ETH Zurich

The system is supplemented by chillers arranged locally at the facade. Light-emitting diodes, that is, warming differently than fluorescent tubes or holo-lamps, only moderately reduce not only the need for air conditioning, but also the power consumption for the lighting.

Material, space and energy saving

That is respected in the planning of air conditioning on energy consumption Arno Schlüter, leader of the project “3for2” and Professor for architecture and building systems at ETH Zurich explains, so: air conditioning will typically in the Baudesignphase developers and their advisors selected, would bear no responsibility for the future energy consumption of the building.

Water cooled buildings Singapore
Overview of the different systems. Photo: ETH Zurich

“The 3for2 concept tries to reconcile the different interests under a hat by suggesting a holistic approach, the material, space and energy saving”, said Schlüter.

Gift for researchers

Developers had to rethink massively. During cold and warm seasons change in Europe, it’s always hot in Singapore and moist, the Zurich Professor finds ” speak the worst case scenario for a pleasant indoor climate”. “Energy-efficient buildings we have received as a researcher in the field of a great gift the 3for2 project in Singapore”, says Adam Rysanek, senior researcher at the ETH Zurich. “There are not many places in the world where academic researchers can test out so many ideas directly in practice and explore.”The 3for2 project fits perfectly to the ambitious objectives of the City-State . The energy demand in Singapore by 35% to fall until 2030.

Optimization of air conditioning will be crucial. Currently going for around 60% of electricity consumption in buildings below traditional model.

Cooling brick out of the 3D printer

Designers have developed a brick with passive air conditioning from California, coming out of the 3D printer. People took advantage of the underlying principle of evaporative cooling already several thousand years ago. The inventors hope that the stones was in the future eliminate air conditioners in homes.