Air Quality Monitoring in Stuttgart

Prof. Dr. techn. G. Scheffknecht

Institute of Combustion and Power Plant Technology

Installation and Operation of Ambient Air

Monitors in Stuttgart-Lauchäcker

Monitoring Station

Student Research Project

Devansh Sharma

WASTE Generation 2011

Objective of the study

• To repair, install and bring into operation three different Air

Quality Monitoring Instruments

• At the existing Measurement Station in Lauchäcker, Vaihingen

• And to set up the online data transfer system to IFK

2

Site of the Station

3[www.uni-stuttgart.de]

Measurement Station site on Satellite Image

4

[www.maps.google.com]

List of Existing Sensors operated by Institut für

Wasser- und Umweltsystemmodellierung

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Anemometer (Wind propelled)

Anemometer (Ultrasonic)

Thermometer

Hygrometer

Actinometer

Rain Gauge

Micro Rain Radar

Barometer

Soil Thermometer

Soil Moisture Probe

Soil Heat Flux Sensor

6

Photo of the Measurement Station

Pollutant Monitors

Compund Principle Analyzer Type Range Standards/Literature

NOX ChemiluminiscenceHORIBA APNA

350E0 - 500 ppb EN 14211

CO NDIR HORIBA APMA 360 0 - 10 ppm EN 14626

O3 UV absorptionThermo 49C O3

Analzyer0 - 10 ppm EN 14625

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Bring Instrument into operation: NOX (NO+NO2)

• Build 1996

• Instrument had to be tested

and showed problems

• FI blown due to current leak

• Power supply board

replaced at HLUG

• UV Lamp power went down

in testing phase

• Replaced at IFK, from the

spare parts instrument

8

Bring Instrument into operation: CO

• Build 2003

• Donation of HLUG

• Was calibrated when picked

up for zero point, span and

calibration settings

9

Bring Instrument into operation: O3

• Had to be changed twice

• Donation of UBA

• Only digital output was available

• Analog output was installed with

help of HLUG

• Battery died out, settings lost

• Replaced by Thermo Instrument

• Output wasn‘t potential free

• Separation Amplifier was installed

10

Flow diagram from the Setup

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Photo from the Setup

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With the old Ozone Monitor

PC

NOX

CO

O3

Data acquisition: EasyComp Software setup

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Data Transfer using Teamviewer

Teamviewer is a

propreitary software which

have two basic

functionalities:

1. Online file transfer

2. Remote PC control

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Sample results of some measurements

Date/Time NOx NO CO O3

1 min

Average

1 min

Average

1 min

Average

1 min

Average

ppb ppb ppm ppb

01.10.2013 00:01 65,2 36,7 0,22 1,1

01.10.2013 00:02 64,1 36,1 0,22 1,2

01.10.2013 00:03 64,8 36,8 0,24 0,9

01.10.2013 00:04 65,2 36,7 0,22 0,9

01.10.2013 00:05 63,4 35,3 0,23 1,1

01.10.2013 00:06 61,3 33,2 0,23 1,1

01.10.2013 00:07 57,2 31,1 0,23 1,2

01.10.2013 00:08 54,9 29,4 0,23 1,2

01.10.2013 00:09 52,6 28,1 0,21 0,9

01.10.2013 00:10 52,5 28,6 0,21 1,1

01.10.2013 00:11 50,6 27,9 0,21 0,9

01.10.2013 00:12 47,6 25,8 0,22 1,1

01.10.2013 00:13 47,1 25,7 0,2 0,9

01.10.2013 00:14 46 26,3 0,21 1,2

01.10.2013 00:15 45,7 25,2 0,23 1,1

01.10.2013 00:16 47,1 25 0,22 1,1

01.10.2013 00:17 47,9 24,8 0,21 1

01.10.2013 00:18 47,2 24,4 0,21 1

01.10.2013 00:19 47,6 24,6 0,2 1,1

01.10.2013 00:20 46,8 24 0,22 1,2

01.10.2013 00:21 47,7 24,6 0,23 1

01.10.2013 00:22 47,7 24,8 0,22 1

01.10.2013 00:23 45,5 23,2 0,21 0,9

01.10.2013 00:24 45,5 23,6 0,21 1

01.10.2013 00:25 47,9 25,3 0,21 1

01.10.2013 00:26 47,6 26,1 0,21 1,2

01.10.2013 00:27 46,6 26,4 0,21 1,1

01.10.2013 00:28 46 24,8 0,22 1,1

01.10.2013 00:29 46 24,4 0,2 1,1

01.10.2013 00:30 46,6 24,2 0,22 1,2

Date/Time NOx NO CO O3

30min-

Average

30min-

Average

30min-

Average

30min-

Average

ppb ppb ppm ppb

01.10.2013 00:00 51,6 26,7 0,22 1

01.10.2013 00:30 51,4 27,8 0,22 1,1

01.10.2013 01:00 68,4 41,7 0,24 1,2

01.10.2013 01:30 40,4 20,8 0,19 1,3

01.10.2013 02:00 24,5 10,3 0,16 1,3

01.10.2013 02:30 21,8 7,9 0,15 1,2

01.10.2013 03:00 32 15,2 0,17 1,1

01.10.2013 03:30 36,8 19,8 0,18 1,1

01.10.2013 04:00 44,9 23,3 0,17 1,1

01.10.2013 04:30 53,3 30,3 0,17 1,1

01.10.2013 05:00 63,3 40 0,18 1,1

01.10.2013 05:30 57,4 36,7 0,17 1,1

01.10.2013 06:00 46,9 30,4 0,18 1,2

01.10.2013 06:30 41,3 28 0,18 1,1

01.10.2013 07:00 75,9 53,7 0,29 1,1

01.10.2013 07:30 84,8 55,5 0,31 1,2

01.10.2013 08:00 68,2 41,4 0,24 1,1

01.10.2013 08:30 73 44,9 0,23 1,1

01.10.2013 09:00 55,8 32,2 0,2 1,1

01.10.2013 09:30 83,6 53,4 0,27 1,1

01.10.2013 10:00 86,3 55,6 0,26 1,1

01.10.2013 10:30 82,7 52,7 0,25 1,1

01.10.2013 11:00 85,2 53,1 0,26 1,2

01.10.2013 11:30 73,8 43,2 0,24 1,1

01.10.2013 12:00 71,2 42,1 0,25 1,1

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Sample results for two days of

measurement -1

16

0

2

4

6

8

10

12

14

16

18

20

0

50

100

150

200

250

O3

Co

nc i

n p

pb

NO

X, N

O C

on

c i

n p

pb

Time

NO

NOX

O3

02.10.201301.10.2013

Sample results for two days of measurement -2

18

0

2

4

6

8

10

12

14

16

18

20

0

50

100

150

200

250

O3

Co

nc

in p

pb

NO

X, N

O C

on

cin

pp

b

NO

NOX

O3

0

0.1

0.2

0.3

0.4

0.5

CO

Co

nc

in

pp

m

Time

CO

01.10.2013 02.10.2013

Pollutant Wind Roses (October data average)

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0

10

20

30

40

50N

NNE

NE

ENE

E

ESE

SE

SSES

SSW

SW

WSW

W

WNW

NW

NNW

NO/NO2 Conc in ppb

NO2

NO

NOX vs Wind speed for October

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O3 vs Wind speed for October

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NOX vs Overall Radiation Balance

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Conclusions

• The ambient air quality monitors were repaired and installed

• Brought into operation with data acquisition

• Results from pollution and meteorological parameters put

together for analysis

• Further work could be done after the instruments are

calibrated and operating continuously

• Data transfer and plotting can be automated, and the results

can be made available on the institute website [Campus Wetter

(Stuttgart-Vaihingen)]

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THE END

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