ENS Urban focuses on air purification in public spaces, such as parking garages, shopping areas and city parks, where air pollution is captured before it spreads over the (urban) environment.
ENS Urban focuses on air purification in public areas, including parking garages, shopping areas, and city parks. With our technology it is possible to remove the contamination of an important source an thus improve the air quality in the surrounding area. Thanks to this innovative technology, we improve city air both on a small and large scale. This creates a healthier environment for living, working and recreation.
Air quality in urban areas
A lively and busy city has great appeal. This often translates into poor air quality, to which people living, working and recreating in the city are exposed. Research shows that not only long-term exposure to particulate matter has unpleasant health implications, but also that short-term exposure already has harmful effects, including on genetic material.
Although a significant proportion of air pollution in the city is supplied from outside the city, traffic in the city has an above-average share of air pollution at street level. Because of the dense construction, local accumulations of pollution can occur, also known as ‘street canyons’ with a notoriously poor air quality.
In addition to existing measures by city governments to improve air quality, ENS offers technological solutions that focus on the source approach, and that can have a particularly positive impact on hotspot locations and the immediate environment, in which mobility measures are not sufficient or impossible.
Traffic as a source of particulate matter, ultrafine particles and soot
The emission of particulate matter, soot and gaseous air pollutants from vehicles is a direct and the most important source of air pollution on, and in the immediate vicinity of, roads and highways. Exhaust emissions resulting from the combustion of fossil fuels contribute significantly to traffic-related air pollution. However, the bulk of air pollution from vehicles results from non-exhaust emissions due to wear of the brakes and tires from the airborne turbulence.
The ENS technology has proven itself to be able to capture both the combustion (exhaust emissions) and the wear particles (non-exhaust emission) that are produced by road traffic. Previous projects have shown that especially the soot fraction, which is the most harmful to health, is very effectively captured.
Clean air solutions
Within the urban area there are many applications for the ENS technology. The systems of ENS can be integrated into existing buildings or infrastructure, such as tunnels parking garages, public buildings and public transport stations, but also when stand-alone objects are placed on the street side (bus stops, street furniture), or on squares and in parks, such as the Smog Free Tower (in collaboration with Studio Roosegaarde). The effect will be greatest locally, but as a result of air displacement by wind, the effect will also be noticeable in the environment.
The integration of the particulate matter capture technology into the existing infrastructure and in buildings in an (inner) city has a twofold purpose, firstly to improve the air quality in the building concerned, and secondly in the immediate vicinity at street level.
For example, a parking garage has an increased concentration of harmful gases and fine dust compared to the city air. When using systems in the garage these sources are captured, but because a parking garage is continuously ventilated with outside air, a second effect is achieved when the cleaned air is emitted into the inner city.
Measurements and effect research
In order to provide insight into the effect of air cleaning, an effect study can be carried out. With the support of scientists, high-quality 3D effects simulation can be performed (using CFD, Computational Fluid Dynamics), supported by national and international source material and possibly supported by measurements as input for the calculations.
A city center is often characterized by a high density of parking garages. Parking garages are often centrally located in the city center, close to busy traffic arteries with increased concentrations of air pollution, but also near a shopping and recreational area where many people are exposed to these contaminations. Concentrations can increase in parking garages as a result of high car density and relatively many traffic movements in a small space. To keep air quality manageable, parking garages are continuously ventilated with relatively high outside air flows. The polluted air is often emitted at ground level.
By implementing air purification systems in parking garages, both particulate matter and soot can be eliminated from the (city) air in these parking garages. The air quality in the garages will improve as a result, and the air that is removed from the garages will also contain a lower amount of air pollutants. The exhaust air can even be cleaner than the outside air, which will also improve the air quality in the immediate vicinity of the parking garages. This cleaner air will displace polluted city air from the parking garages in which air cleaning is applied.