Diesel Aerosol Monitoring with a high speed Laser Spectrometer

1Grimm 2

Aerosol Technik GmbH, Dorfstrasse 9, D-83404 Ainring, and GIP GmbH, Mühlbecker Weg 18, D-06774 Pouch. ETH Zürich, Aug. 20th, 2002

GRIMM Laser Spectrometer 1. Instrument Concept 2. Measurement Arrangement 3. Results 4. Instrument Conclusions

ETH Zürich, Aug. 20th, 2002

Optical Particle Counter Concept ADVANTAGES: •Count Concentrations 104 /cm3 •Min.refractive index influences •High sheath air cleaning •Automatic ZERO test •Sample collection on filter •Instant results •Portable and light weight •Optional: •Dehumidification system •Dilution System •Remote (MODEM )control •Extra sensor attachment •Software package ETH Zürich, Aug. 20th, 2002

Optical Detection System Upstream the Filter

SHEED-A I R

SHEED-A I R

Focused Laser Light

Sample Filter Downstream the Filter SAMPLE AIR FLOW TO PUMP QUANTITECH Meeting, April 2002 18th,2002 ETH Zürich, Aug. 20th,

GRIMM

DUAL Method Particles in Air

Laser Light Scattering For Real Time From 300 nm upwards

Collection Filter For GRAVIMETRIC use

1.100 Series-2001 GRIMM PATENT

ETH Zürich, Aug. 20th, 2002

1st LATEX Monodisperse Particle Calibration ETH Zürich, Aug. 20th, 2002

2. MASS-Calibration

ETH Zürich, Aug. 20th, 2002

INSTRUMENT VERIFICATION Present 1.109 Size Range from 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 1.00 1.60 and 2 micron

CONTROL PARAMETERS FOR EACH UNIT: * Calibration of all 12 or16 size channels •· Flow control system setting for 72l/h •· Count control to 107 Particles/dm3 •· And Mass control to 10 mg/m³ •· 1 sec Size distribution control •· 1 sec Data refreshed control • Data protocol in counts and mass •· Data storage on data logger card •· Communication control via RS-232 •· Port control for Temp.- +rel.Humidity •· Build-in dust collecting filter •· Build-in battery charger control •· Battery and VAC control at 110 / 220 •· Driver and GRIMM software control • Physical inspection. ETH Zürich, Aug. 20th, 2002

Instrument Concept 2.Measurement Arrangement Obtained Results Instrument Conclusions . ETH Zürich, Aug. 20th, 2002

Example of an 1.108 Laser Spectrometer used for Real-time „AIR-SCANNING in combination with an 8 stage impactor ETH Zürich, Aug. 20th, 2002

Example of a 1.108 Laser spectrometer in combination with a portable Diluter ETH Zürich, Aug. 20th, 2002

Stationary Test System Configuration CVS DIESEL Engine

CRT

Sampling: (Rot. Disk Diluter, MATTER Eng.)

195.587 P/cm3 Grimm

Dust Monitor 1.108

ETH Zürich, Aug. 20th, 2002

Sampling

Arrangement: A rotating disk diluter (Matter Inc.) is used for instant Measurement assuring proper sample feeding at variable MOTOR conditions.

ETH Zürich, Aug. 20th, 2002

Instrument Concept Measurement Arrangement 3. Obtained Results Instrument Conclusions . ETH Zürich, Aug. 20th, 2002

EBG52R12 Background Measurement

(Data in Seconds)

1000 900 800

Counts and Size Range Ca 25 Ca 5

600 500 400

Door opened

Test

300 200 100

ETH Zürich, Aug. 20th, 2002

2276

2211

2146

2081

2016

1951

1886

1821

1756

1691

1626

1561

1496

1431

1366

1301

1236

1171

1106

1041

976

911

846

781

716

651

586

521

456

391

326

261

196

131

66

0 1

Konz. [P/Nccm]

300 nm 400 nm 500 nm 650 nm 800 nm 1000 nm

Ca 85

700

Particle Size and Count Change in 4 size channels EHC51R12 at Repeated Constant Motor Load in KW

80.000

1200,0

45000,0

The #1.108 has 16 different size channels

40000,0

Count limit

35000,0

800,0

30000,0

650 nm

25000,0

500 nm

20000,0

600,0

400 nm

15000,0

400,0

300 nm

10000,0 200,0 5000,0 0,0

ETH Zürich, Aug. 20th, 2002

2146

2081

2016

1951

1886

1821

1756

1691

1626

1561

1496

1431

1366

1301

1236

1171

1106

1041

976

911

846

781

716

651

586

521

456

391

326

261

196

131

66

0,0 1

Konz. [P/Nccm]

1000,0

EHC51R12 Particle Counts and Motor Load Curve

( in KW) 1200

45000,0 40000,0

Acceleration peaks

800

30000,0 25000,0

600 20000,0 400

15000,0 10000,0

200 5000,0 0

ETH Zürich, Aug. 20th, 2002

2146

2081

2016

1951

1886

1821

1756

1691

1626

1561

1496

1431

1366

1301

1236

1171

1106

1041

976

911

846

781

716

651

586

521

456

391

326

261

196

131

66

0,0 1

Konz. [P/Nccm]

35000,0

1000

Dust Mass, ParticleEHC51R12 Size and Motor Load in µg/cm3 (in KW) 1200

45000,0 40000,0

1000

800

30000,0 25000,0

600 20000,0 400

15000,0 10000,0

200 5000,0 0,0

ETH Zürich, Aug. 20th, 2002

2179

2113

2047

1981

1915

1849

1783

1717

1651

1585

1519

1453

1387

1321

1255

1189

1123

1057

991

925

859

793

727

661

595

529

463

397

331

265

199

133

67

0 1

Konz. [P/Nccm]

35000,0

EHM49R12 Particle Counts and Motor Load at different conditions ( in KW) 10000

300

9000

300 nm 8000

250

400 nm

500 nm 7000

650 nm

200

6000 5000

150

4000 100 3000 2000 50 1000

ETH Zürich, Aug. 20th, 2002

3605

3499

3393

3287

3181

3075

2969

2863

2757

2651

2545

2439

2333

2227

2121

2015

1909

1803

1697

1591

1485

1379

1273

1167

1061

955

849

743

637

531

425

319

213

0 107

0 1

Konz. [P/ccm]

Motor power

Instrument Concept Measurement Arrangement Obtained Results 4. Instrument Conclusions . ETH Zürich, Aug. 20th, 2002

Conclusion:

DIESEL Particles can be mesured in real time at any specific sampling point with the rotating disk diluter (Matter) and the attached * „white“ model (1.108) ( = 15 channels from 03. to 20 µm)

* or the „silber“ model 1.109 (= 12 channels from 0.2 to 2µm)

ETH Zürich, Aug. 20th, 2002

INSTRUMENTATION OUTLOOK Possible integration of a • Dilution system • Sample conditioner • 19“ rack solution

Instrument improofment for • Sensitivity below 100 nm • Selve test intellegence • Application software GRIMM AEROSOL TECHNIK

ETH Zürich, Aug. 20th, 2002

An interesting way for futhure optical Instrument Applications...

THANK YOU FOR. YOUR ATTENTION ETH Zürich, Aug. 20th, 2002