After a successful launch of the Smog Free Project in the Chinese capital of Beijing last year, the Smog Free Tower has arrived in the city of Tianjin. Daan Roosegaarde and his team of designers and engineers have now shared new results compiled by the Eindhoven University of Technology for the Smog Free Tower in China. The findings of Prof. Blocken, a renowned scientist in the field of urban physics, are based on measurements conducted by a team of experts and confirm the effects of the Smog Free Tower.

Positive results

“The Smog Free Tower works with the proven ENS technology of positive ionization to remove large fractions of particulate matter from the air in its immediate surroundings. Both the technology and the Smog Free Tower itself have been successfully evaluated with both field measurements and numerical simulations with Computational Fluid Dynamics. The results confirm that the tower captures and removes up to 70% of the ingested PM10 and up to 50% of the ingested PM2.5. For a tower in an open field in calm weather, this provides PM10 reductions up to 45% and PM2.5 reductions up to 25% in a circle with diameter of more than 20 m around the tower. When the tower is applied in semi-enclosed or enclosed courtyards, the beneficial effects can be much larger.” (Prof. dr. Bert Blocken, Eindhoven University of Technology, the Netherlands and KU Leuven, Belgium)

Reduction in PM10 concentration (in percentage) by the SFT in near-zero wind conditions, up to distance of 10 m from the tower (Photo: Eindhoven University of Technology).

Lungs of the City

ENS Clean Air has established a strong collaboration with Prof. Blocken and his research group at the Eindhoven University of Technology through a number of projects concerning urban and infrastructural air purification. Currently, we are mutually preparing to take our project ‘Lungs of the City’ to the next level. Together, we devised a concept in which large-scale air purification in the city’s existing infrastructure substantially improves the air quality on a city-scale. On-site measurements in a pilot project in a car park in the city of Eindhoven will be executed in order to validate the effect of the concept.