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CTA Documentation

News and updates in this section
General Information
Efficiency Tests
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26/02-2007 - Added article about tunnel fire rescue in press/publications section
19/02-2007 - Pictures of carbon for the Madrid project added
19/02-2007 - New insulator test added to 'Development' section
17/02-2007 - Documentation section rearranged. Many new files added.

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Clean Tunnel Air International AS Company Profile
A introduction to who we are and what we do.



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Efficiency test Stömsås Tunnel Norway (2001)
Strömsås tunnel has a length of 3750 m The Norwegian road authorities have installed an electrostatic precipitator (EP) based cleaning system Ceiling Mounted x 4, from CTA International to remove particle fractions from the tunnel air.


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Efficiency test of CTA`s high velocity EP cells (2001)
Test was carried out by Technical University Graz Institute of Electrical Power Systems and High Voltage Engineering




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Efficiency test CHINBU Tunnel South Korea (2000)
Chinbu tunnel has a length of 2317 m and a cross-section area of 63.4 m2. The Korean road authorities (KHC) have installed an electrostatic precipitator (EP) based cleaning system from CTA to remove particle fractions from the tunnel air. The EP cleaning system in the Chinbu tunnel is the first of its kind in South Korea.

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Fractional Efficiency Test C, High velocity EP-S Cell (2000)
Fractional Effeciency test preformed by HiST (Sør-Trøndelag University College) of our EPS Cell.




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Efficiency test of CTA`s high velocity EP-S cells (2000)
Test carried out by HiST Department of Mechanical Engineering





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New Generation Power Pack
Information on the new generation CTA power pack.

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Tunnel filters make fire rescue work easier
Publication about the effect of electrostatic filters in tunnels to ease the rescue work. First time published in 'Gemini No. 1 January 1999'.

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The Efficiency of Particle Cleaning in Norwegian Tunnels
Paper written by Mr. Jan Eirik Henning (Norwegian Public Roads Administration, Directorate of Public Roads). This was prepared for 'The Safety Session' in 1997. This paper gives an in-depth explanation on the use of electrostatic filters in Norwegian tunnels for particle cleaning.

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Test of newly developed CTA insulator for EP Cell (2006)
Clean Tunnel Air AS have developed a new insulator for our EP cells. Here you can see the technical report carried out by the 'University of Graz'.


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New Generation Power Pack
Information on the new generation CTA power pack.

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Active Carbon for Gas Cleaning
Pictures from M-30 Túnel Sur, Madrid, Spain. Totally we will use 550.000 KG carbon for the gas cleaning (2 filter stations).




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