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The primary source of fine dust in subway stations is heavy metal particles produced by wheel-rail contact, train brakes, and the wearing of the pantograph. The main source of noise is the rolling noise generated when wheel-rail contact occurs within the tunnel. Managing fine dust and noise inside tunnels has been challenging due to technical limitations, making these areas a blind spot for effective pollution control.
FDC has developed the world’s first compact, integrated module combining an ion-wind-based dust collection unit with high-speed railway-standard acoustic absorption materials. (5 patents filed, 3 registered, PCT pending) Its slim and simplified design allows for installation in close proximity to the wheel-rail contact points within tunnels the primary source of fine dust and noise. By capturing pollutants at the source before they diffuse into station platforms, this innovative solution achieves the most efficient simultaneous reduction of both fine dust and noise.
A device that collects fine dust directly near the tracks in the tunnel to reduce fine dust before it spreads into the platform. The first device that can simultaneously reduce fine dust and noise that also supports noise reduction performance generated by the track at the same time (Received the Prime Minister's Award at the 2023 Korea Invention Patent Exhibition)
For the collection and reduction of fine dust such as brake wear dust, tire wear particles, and metal fine particles in road tunnels A device that exerts the same effect
A device that effectively collects and reduces fine dust composed of particulate matter that is the source of air pollution in underground shopping malls, dust that is re-scattered by user activities, and organic particles caused by cooking activities
By applying high voltage to a specially designed emitter, the ionic air generated by the corona discharge induced collects fine dust from the outside without a fan, and simultaneously reduces fine dust and noise by composing the outside with sound-absorbing materials.
There is no fan, but it is an active method that generates forced wind based on electrohydrodynamic principles.
The generated ionic air applies the principle that ions attach to the surface of the dust, causing the charged dust particles to move directionally and be captured in a collector with opposite polarity.
The most efficient wind speed of 1m/s for electrostatic precipitators enables forced intake and exhaust of outside air.
Compact, modular unit structure without fans and filters for safe installation without exceeding the construction limits inside the tunnel
FDC Module: 720x290x103mm (FDC Total: 1220x520x150mm, without sound absorbing material)
Certified wind pressure test: No structural damage, cracks, abnormal deformation up to a maximum wind pressure of 5000Pa (equivalent wind speed of about 90m/s)
Certified dust collection efficiency: PM10 96.9%, PM2.5 98.2%
Seoul Demonstration Tunnel Fine Dust Reduction Effect: 40.4% based on PM2.5
Noise reduction effect in the Seoul demonstration train: 3.1dB
Power consumption: Approximately 20Wh per module, which is 1.9% higher than the same level of foreign dust collection technology and 1.6% higher than large-scale domestic dust collection technology, enabling 24-hour operation at all times.
Filter-free construction: No filter replacement minimizes maintenance costs, no filter waste generation and is environmentally friendly
Noiseless structure: no fan, no noise during operation
Smart Operation: IoT-based real-time monitoring function minimizes dependence on manpower and implements unmanned operation system
On-site applicability: long-term operation for more than 1 year in the urban railway tunnel of the operating line, equipment stability and durability, Completed safety verification
System optimization: System optimization is possible by reflecting the technical requirements of the operating organization and narrow environmental conditions.
Efficient maintenance: Maintain optimal dust collection performance with about 1 water cleaning per quarter, support automatic water cleaning function (optional)
FDC is a modular product, and the more modules are installed, the greater the fine dust collection performance.
Determine the required quantity based on the reduction target and actual on-site survey
Since it is a modular unit, it can be installed in hotspots with high levels of fine dust and pollution.
Since FDC is a product with a modular unit structure, it is easy to transport and install, and if additional fine dust reduction effect is required after the basic quantity installation at the time of initial introduction, additional installation can be done in the minimum quantity unit, making it the most economical and cost-effective expansion
FDCs can be operated at all times due to their low electricity consumption (about 20Wh per module), ensuring practical operational efficiency and economy (the annual maintenance cost of FDCs is expected to be about 25.9% of that of large dust collectors).
If the concentration of fine dust in the platform is reduced at all times through the 24-hour operation of the FDC, the indirect effect of reducing the operating time of the ventilation system or large air purifiers in the entire station or the platform can be expected, which may incidentally reduce the overall electricity bill and filter replacement cost in the station
Since FDC has a filterless structure, there is no need for the cost, labor, and time required to replace the filter.
The same economy and efficiency are demonstrated in road tunnels and underground shopping malls.
Efficient and practical fine dust reduction compared to existing devices installed far from the pollution source: World's first.
Continuous collection of fine dust in close proximity to the wheel-rail contact area, where it's mainly generated.
Minimize sound energy propagation by absorbing sound near major rolling noise sources, with a sound absorption coefficient(NRC) of 0.7 - overcoming installation and maintenance limitations of conventional sound-absorbing blocks.
Suitable for installation inside tunnels, where pollution levels are highest, making it the most effective solution forcontrolling fine dust close to the source.
Expected to protect and improve the health of citizens and railway workers, while enhancing passenger satisfaction by reducing both railway noise and fine dust.
Securing high performance without fans, ducts, or filters.
Thin and simple module structure allows for easy installation anywhere.
Customizable number of modules and design to fit the environment and requirements of each installation site.
Maximize investment efficiency with affordable yet powerful performance compared to similar equipment.
Monitoring and maintenance alerts for the device's operating status and performance, accessible from anywhere via 5G or LTE cloud connection.
Enables systematic management ofthe subway air environment by constantly measuring fine dust concentration at the installation site
Efficient operation based on feedback: Minimize operating time and power consumption based on fine dust concentration, with automatic checks and adjustments for maintenance needs like cleaning.
In the current high-concentration fine dust environments, the maintenance(cleaning) cycle is every 3 months.
Maintains optimal dust collection efficiency with only four simple water washes per year.
The maintenance server automatically determines the operating status of individual devices. If cleaning is necessary, the device automatically cleans itself, and immediate cleaning is also possible if needed.(Optional)
Highly economical with no need for periodic filter replacement, and a simple structure that makes maintenance and repair easy.
Six times more effective at 50% of the cost compared to similar foreign products.
Consuming only about 20Wh per module, this system offers exceptional cost-efficiency—representing just 1.9% of the power consumption of equivalent foreign technologies and 1.6% of large-scale domestic technologies, enabling continuous 24/7 operation.
Maintained by cleaning with water without consuming filters, with excellent energy efficiency contributing to carbon neutrality.
Designed to maximize noise and fine dust reduction performance simultaneously
Simple structure with no fans, ducts, or filters, and an automatic water washing function reduces maintenance time and costs, making management easier.
Small and compact modular structure allows custom design, making it highly applicable to existing facilities and easy to transport, install, remove, and maintain.
Suitable for application to public facilities such as railways due to semi-permanent use.
Contributes to improving the health and convenience of railway users and workers, and can be expanded to various industrial fields such as public facilities and construction sites in the transportation sector, contributing to environmental improvement by enhancing air quality and reducing noise.
Corona discharge is induced in a specially designed emitter,and the generated ions move and continuously collide with neutral air molecules to collect fine dust through a dust collection unit that generates an electrohydrodynamic ionic wind heading in the designed direction.
The front part is a sound-absorbing part made of non-combustible high-strength sound-absorbing material, which absorbs generated noise. It has a sound-absorbing structure like a resonator along with the intermal rear air layer, which improves sound-absorbing performance. At the same time, the performance of the dust collector is doubled by having a structure that allows air to pass through the perforated part.
Even though it is an Fine dust collector and does not have a fan, it has excellent dust collection efficiency by forcibly inhaling and exhausting outdoor air at a wind speed of 1 m/s by applying apply an ionic wind generation design, and the ozone generation is at the lowest level among domestic electrostatic precipitators due to the special design of the discharge part.
Awarded for Innovative Product by the Ministry of Land, Infrastructure and Transport in 2024
Prime Minister's Award at Korea Invention Patent Exhibition 2023
Included in the new technology of the Ministry of Environment's 4th Underground Station air quality improvement plan (2023~2027)
Selected and accepted for test bed project by Seoul Business Agency (2022)
Ministry of Land, Infrastructure and Transport fund for Technology Innovation Research Project
Five related patent applications and three registered / international patent applications are planned
On-site performance evaluation by an accredited testing agency
- Proven on-site dust collection efficiency of over 95%, with field test results in subway tunnels confirming an approximately 40% reduction in fine dust (based on PM 2.5)
- Confirmed the effect of reducing noise in the passenger car by more than 3 dB
- The ozone level generated at the site is less than the outdoor air, confirming the unit's safety.
Maintenance is possible with automatic water cleaning without filter replacement, and compared to similar foreign products, the air volume handled is 200% higher. The product has excellent energy efficiency, contributing to carbon neutrality.
lthough FDC is a fanless device without a filter, air intake is actively possible, and the device can be modularized. So, it is highly applicable to existing facilities and is easy to install, remove, and maintain.