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Tunnel Air Flow Measurement TMS3000

Tunnel Air Flow Measurement TMS3000

2-3 Weeks Del.

Quick Overview

The TMS3000 is designed for air flow measurement for ventilation control in road tunnels. The TMS3000 system is specifically designed for working under conditions prevailing in road tunnels. In the road tunnel area only robust mechanical sensors made of stainless steel are used and the the signal processing electronics are located in a separate control room.
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Details

The high-resolution measurement allows continuous blower control and effective optimization of power consumption of the fans. The TMS3000 system has been successfully used in world's longest tunnels (e.g. the Gotthard in Switzerland or Plabutsch in Austria) and also shorter tunnels (e.g. University in Düsseldorf, Germany).

Measurement is based on high-precision pressure measurement using special differential Pitot tube sensors (DPS) which results in accurate flow measurement of the air through the tunnel.

This system has many advantages:

  • Robust sensors made of stainless steel.
  • No moving parts.
  • No active electronic components in the road tunnel
  • The measuring system is practically maintenance-free (recommended inspection interval – 5 years).
  • Excellent measurement is still guaranteed even in case of fire (available for operating temperatures of up to 1200 °C).
  • High resolution of less than 0.1 m/s in both flow directions.
  • Information on flow rate through the tunnel cross-section gives precise flow measurement without any impact of road traffic.
  • Optional calibration by our accredited test rig installation for air flow (ISO 17025).
  • An absolute zero-point stability thanks to pneumatic Autozero system
    (automatically repeating "zeroing" of the deltaP measuring cells).
  • Absolute air pressure measurement (barometric pressure) is already included.
  • The Pitot tube sensors protrude only for approx. 40 cm into the driving area.
  • Very easy dismounting of the deltaP Pitot tubes without tools during periodic cleaning of the tunnel walls.

The ventilation of road tunnels ensures that noxic gases (above all carbon monoxide) and dirt particles are removed from the tunnel. The ventilation will become efficient and economic if it can be controlled using the flow rate of the air. Flow measurement systems TMS 3000 measure the exact flow rate in the longitudinal direction of the tunnel. Local turbulences constantly caused by traffic in the tunnel have no influence.

TMS 3000 averages the flow rate vz in the longitudinal direction of the tunnel (z-direction) through the tunnel cross-section and thus measures the actual volumetric flow rate of the air through the tunnel.

Transversal components vx and vy that are not involved in air transportation in the longitudinal direction z of the tunnel don‘t contribute to the measuring signal.

Airflow measurement systems TMS 3000 are specifically designed for working under conditions prevailing in road tunnels. In the driving area there are only robust mechanical sensors made of stainless steel, the evaluation electronics is located in a separate control room.

The high-resolution measurement allows continuous blower control and thus an effective optimization of fans and power consumtion. Our devices have been successfully used in the longest tunnels (e.g. the St.Gotthard Tunnel in Switzerland or Plabutsch in Austria) or shorter tunnels (e.g. University Tunnel in Düsseldorf, Germany).

Measurement is based on high-precision differential pressure measurement which results in accurate flow measurement of the air through the tunnel. The data from the separately mounted field transmitters are transferred digitally into the evaluation unit (RS 485).

Even larger traffic density in a tunnnel cannot affect the measurement. The former can lead to significant measurement errors in ultrasonic measurements with time-of-flight method.

Technical data

Measurement of the flow rate through the tunnel (in the longitudinal direction)

Measuring ranges: -10 ... 0 ... +10 m/s
-15 ... 0 ... +15 m/s
-20 ... 0 ... +20 m/s
Resolution/accuracy: <±0,1 m/s depending on the tunnel geometry
Outputs:

4 ... 20 mA for the parameters:
- Air velocity [VXA] at the deltaP Pitot tube A
- Air velocity [VXB] at the deltaP Pitot tube B
- Average air velocity value [VXAB] (averaged over tunnel cross-section)
- Air temperature at the measuring points A and B (-30 … +140 °C, optionaly -30....+600°C)
- Average air temperature [TAB] at the measuring point.
- Barometer pressure at the measuring point (600 ... 1100 mbar)

Service and Parameterisation Interface:

I2C, on the front side of the evaluation unit

Availability: Stock Item

 

Components / Downloads

For further information, technical advice, or a quotation please call or email us. If you are not sure which product you need one of our technical sales advisors will be happy to discuss your application. We also accept company purchase orders by fax or post. Credit card orders can also be placed over the phone for any product.

REF DESCRIPTION DOWNLOADS PRICE ORDER ITEM
 
TMS3000 with separate transmitter and field housing
TMS3000-AA
TMS3000 tunnel measuring system comprising of 2 DP sensors, powerlink transmitter box and control unit with analog O/Ps, status inputs and status outputs
View FileTMS3000-Config A
   Size: (320.78 KB)
View FileTMS3000 Brochure
   Size: (540.63 KB)
£7,558.32
or call us for a quote
TMS3000-AD
TMS3000 tunnel measuring system comprising of 2 DP sensors, powerlink transmitter box and control unit with digital O/P interface ( bus system )
£8,199.97
or call us for a quote
TMS3000-AAD
TMS3000 tunnel measuring system comprising of 2 DP sensors, powerlink transmitter box and control unit with analog O/P and Profibus O/P
£8,736.23
or call us for a quote
 
TMS3000 with transmitter directly connected to control unit
TMS3000-BA
TMS3000 tunnel measuring system comprising of 2 DP sensors connected to control unit with analog O/Ps, status inputs and status outputs
View FileTMS3000-Config B
   Size: (264.26 KB)
£7,022.83
or call us for a quote
TMS3000-BD
TMS3000 tunnel measuring system comprising of 2 DP sensors connected to control unit with digital O/P interface ( bus system )
£7,664.49
or call us for a quote
TMS3000-BAD
TMS3000 tunnel measuring system comprising of 2 DP sensors connected to control unit with analog O/P and Profibus O/P
£8,200.74
or call us for a quote
 
TMS3000 Accessories
SMAG-PWRLINK-CAB
SMAG powerlink cable, connects powerlink transmitter units to control unit, price for 50 metres.
£288.51
or call us for a quote