Tunnel ventilation system. Containment and cleansing of polluted air in tunnels for a healthy living environment near city ring roads

Key points

• The demand for clean cities is increasing. The traffic nuisance in and near cities is a serious threat to public health and the economy.
• Covering ring roads and, extracting and filtering polluted air at the tunnel and road-covering exits solve the pollution caused by fine particles and other environmental problems.
• A tunnel or road-covering structure is partially funded with the proceeds of the created extra building ground. Thanks to the energy-recuperation system air filtration can be free of charge.
• The return on investment of the HD Clean Tunnel system is 5 years thanks to its heat-recuperation feature.
• Traffic energy is used to heat the tap water and for the central heating system of houses and buildings within a one-kilometre radius.
• The extraction and filtration uses the natural air flow in tunnels and does not rely on heavy energy consuming mechanical air-propulsion systems.
• Keeps 90% of the pollution/fine particles within the tunnel and removes these from the air instead of spreading the pollution across the area near the tunnel entrances or emitting it at high altitudes in order to decrease the concentrations in simulation programmes or near measuring locations.
• The HD Clean Tunnel system is the only combined air-cleaning and energy-recuperation system for tunnels and road-covering structures. It reduces CO2 levels and minimizes emission at tunnel entrances.
• The HD Clean Tunnel system is a realistic, feasible and affordable system that uses proven innovative technology.