【東京ダイレック】TSI Webinar Continuous …...• Background and Motivation –Workplace...

© 2011, TSI Incorporated

Jim Farnsworth

Senior Mechanical Engineer

TSI Incorporated

Thursday, March 24, 2011

Welcome!

Willkommen!

Bienvenue!

Benvenuto!

Recepción!

Καλώς Ήρθατε!

Добро пожаловать!

欢迎!

歓迎 !

환영!

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Continuous Particle Monitoring in an

Office Environment: Sources, Trends,

and Applications


Interactive Webinar Format

1. Connection Information: You need to join the webinar in two ways

– Audio: via telephone - phone numbers and link information

included with e-mail login information

– Visual: via internet - link information included login information

2. Sound quality: For large groups, the sounds quality is much better if the

conference is kept on „mute‟.

3. Multi-media - Interactive chat: Please send questions via chat during and

after the presentation.

4. Follow-up: e-mail including Adobe pdf file of presentation will be sent to

registered attendees.


Outline

• Background and Motivation

– Workplace monitoring

– OPC Theory of Operation

– TSI Particle Monitoring Network

• >1 Micron Sources and Trends

• <1 Micron Sources and Trends

• Conclusions and Future Work

• Questions


Workplace Monitoring

• Why do it?

– Meet PM standards

– Identify sources

– Verify containment measures

– Check effects of changes

• Typical monitoring environments

– Cleanrooms

– Construction sites

– Paper mills

– Machine shops

– Woodworking

• Typical instrumentation

– Gravimetric analysis

– Photometric devices

– CPCs


OPCs for Workplace Monitoring?

Yes!

• Economical

• Concentration range okay

• Commonly used in cleanroom

applications

• Designed to run continuously

on networks


Photo Detector

Light Stop

Aerosol Inlet

Pump or Blower

Focusing Optics

Collecting Optics

Sheath Air

Pre-filter

Exhaust FilterLight source

Exhaust

• Photo detector is set at

an angle to light source

(typically 90 degrees)

• Mirror focuses side

scatter into detector (30-

120 degrees typical)

Side Scatter OPC

Theory of Operation

Signal Processing

time

Sig

na

l (V

)


TSI Particle Monitoring Network

• Internal network of instrumentation at TSI Shoreview

– 12 AeroTrak Particle Counters (OPCs)

– 6 Models

– 4-6 channels, 0.3-10 µm

– Data managed with FMS Software

• Development & Support

– Reliability testing

– Develop/test new products

• Warning System

– Cleanroom Monitoring

– Workplace Exposure

• “Walk the Talk”


FMS Software: Overview

Database Main FMS MonitorView Clients

Instrumentation

Corporate LAN

FMS Capabilities

• Continuous data logging

• Graphing and reporting

• Multi-stage alarming

• Supports any device from any

manufacturer (with driver)

• Expandable to 100+ devices


Eng East

SE Lab

NE Lab

NW Lab

SW Lab

HVAC Lab

JF Office

Monitoring Locations

Level 2Cleanroom

WC411

Exec Suite

Accounting

Machine Shop

Level 1


Monitoring LocationsCleanroom

WC411

Exec Suite

Accounting

Machine Shop

Level 1

3X Model 9306-V2

Model 9310-01

Model 9350-03


Eng East

SE Lab

NE Lab

NW Lab

SW Lab

HVAC Lab

JF Office

Monitoring Locations

Level 2Cleanroom

WC411

Exec Suite

Accounting

Machine Shop

Level 1

4X Model 7301

2X Model 7301-P

Model 9310-01

2X Model 9110-01


Results

Database Main FMS MonitorView Clients

Instrumentation

Corporate LAN


1

10

100

1000

10000

100000

1000000

10000000

100000000

3/10/11 3/11/11 3/12/11 3/13/11 3/14/11 3/15/11 3/16/11 3/17/11 3/18/11 3/19/11

Pa

rtic

le C

on

ce

ntr

ati

on

(#

/ft3

)

Size(s) (μm): 0.5Location(s): TSI CleanroomStart Date: Wednesday 10-Mar-2011End Date: Friday 19-Mar-2011

Results


0.3 μm Comparison5 Weeks, 8/16 – 9/20


0.3 μm ComparisonSunday 8/22 – Sunday 8/29


TSI Machine Shop

0.3 - 5 μm, Sat 10/2/10 – Mon 10/4/10


Indoor Source Characterization

Submicron

• Indoor concentration correlates

closely to outdoor concentration

• Human activity increased

concentration by 2X

Supermicron

• Indoor concentration does not

correlate to outdoor concentration

• Human activity increased

concentration by 20X

From Rodes, C. E. and Wiener, R. W. (2001) Indoor aerosols and

exposure assessment. In: Baron P. A. and Willeke K. (eds) Aerosol

Measurement, 2nd ed. Wiley-InterScience, Inc, pp 859-885.


Hypothesis

Since we know that:

• Supermicron particles are not transported well through HVAC systems

• Supermicron sources are typically local

• Supermicron residence time is short (~5 min @ 1 m height for 5 µm

Fe2O3)

It follows that:

• Supermicron concentrations will correlate with human activities in

indoor spaces

• Information about human activities can be gained from monitoring

supermicron particle concentration in indoor spaces


Size(s) (μm): 0.3, 5.0Location(s): AccountingStart Date: Monday 16-Aug-2010End Date: Monday 20-Sep-2010

Results: Supermicron vs. Submicron


Labor Day

Size(s) (μm): 5.0Location(s): Eng East, AccountingStart Date: Monday 16-Aug-2010End Date: Monday 20-Sep-2010

5 µm Weekly Trends


0

200

400

600

800

1000

1200

1400

0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00 3:00 6:00

pa

rtic

les

/ft3

Employee A 5:38 AM

Employee B 6:09 AM

Employee C 6:26 AM

Employee D 6:26 AM

Employee E 8:03 AM Employee E 5:21 PM

Employee A 5:39 AM

Size(s) (μm): 5.0Location(s): JF OfficeStart Date: Thursday 16-Sep-2010End Date: Friday 17-Sep-2010

5 µm Daily Trends


0

10

20

30

40

50

60

70

80

90

100

0

200

400

600

800

1000

1200

1400

0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00 3:00 6:00

# o

f P

eo

ple

in

En

g E

as

t

pa

rtic

les

/ft3

JF Cube 5.0 Micron

Key Card Data

Size(s) (μm): 5.0Location(s): JF OfficeStart Date: Thursday 16-Sep-2010End Date: Friday 17-Sep-2010

Verification using Key Card Data


18:18:0819:42:18

0

500

1000

1500

2000

2500

3000

3:00 AM 6:00 AM 9:00 AM 12:00 PM 3:00 PM 6:00 PM 9:00 PM 12:00 AM 3:00 AM 6:00 AM

Pa

rtic

le C

on

ce

ntr

ati

on

(#

/ft3

)

2010-OCT-11 19:38:092010-OCT-11 18:15:06

Size(s) (μm): 5.0Location(s): JF OfficeStart Date: Monday 11-Oct-2010End Date: Tuesday 12-Oct-2010

Verification using Camera


0

20

40

60

80

100

120

140

160

180

200

0:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00

Pa

rtic

le C

on

ce

ntr

ati

on

(#

/ft3

)

Time

Eng East

JF Office

Size(s) (μm): 5.0Location(s): Eng East, JF OfficeStart Date: Sunday 19-Sep-2010End Date: Sunday 19-Sep-2010

Employee C 9:46 – 10:16

Sensitivity Analysis: Weekend Monitoring

Employee E 8:03 – 8:04


Size(s) (μm): 5.0Location(s): Various (10 locations)Start Date: Sunday 19-Sep-2010End Date: Sunday 19-Sep-2010

Sensitivity Analysis: Weekend Monitoring

0:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00

MS

HVAC Lab

WC411

SW Lab

SE Lab

NW Lab

NE Lab

Acctg

JF Office

Eng East

Employee E 7:59 – 8:10

Carp

et

Tile

or

Lin

ole

um


Applications

• Smart HVAC Sensor

– Heat/cool based on state of occupancy (i.e. hotel rooms)

– Ventilate based on air quality (i.e. turkey farm)

• Human Presence Monitor

– Occupancy gauge (restaurants, shopping centers, classrooms, hotel lobbies,

etc) for general monitoring or fire code

– Building intrusion security

– Pre-existing networks (such as those in cleanrooms and government

buildings) could be exploited for monitoring human activity


Example SourcesSize(s) (μm): 0.3Location(s): TSI Machine ShopStart Date: Tuesday 5-Oct-2010End Date: Wednesday 6-Oct-2010 CNC Milling Operations

1.0E+03

1.0E+04

1.0E+05

1.0E+06

1.0E+07

1.0E+08

6:00 9:00 12:00 15:00 18:00 21:00 0:00

Pa

rtic

le C

on

ce

ntr

ati

on

(#

/ft3

)

0.3 micron

0.5 micron

1 micron


Example Sources

0.0E+00

2.0E+06

4.0E+06

6.0E+06

8.0E+06

1.0E+07

1.2E+07

1.4E+07

1.6E+07

1.8E+07

2.0E+07

8/16/10 0:00 8/16/10 12:00 8/17/10 0:00 8/17/10 12:00 8/18/10 0:00

Pa

rtic

le C

on

ce

ntr

ati

on

(#

/ft3

)

Size(s) (μm): 0.3Location(s): TSI Machine ShopStart Date: Monday 16-Aug-2010End Date: Wednesday 18-Aug-2010 crock pot 6:15 – 9:15


Example SourcesSize(s) (μm): 0.3Location(s): TSI EngineeringStart Date: Tuesday 1-Mar-2011End Date: Wednesday 2-Mar-2011

0.0E+00

2.0E+05

4.0E+05

6.0E+05

8.0E+05

1.0E+06

1.2E+06

1.4E+06

1.6E+06

1.8E+06

2.0E+06

0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00

Pa

rtic

le C

on

ce

ntr

ati

on

(#

/ft3

)

Electrical Engineering Lab

ENG-EAST

SouthEast Lab

Soldering Activities


Example SourcesSize(s) (μm): 0.3Location(s): TSI EngineeringStart Date: Tuesday 1-Mar-2011End Date: Wednesday 2-Mar-2011

0.0E+00

2.0E+06

4.0E+06

6.0E+06

8.0E+06

1.0E+07

1.2E+07

1.4E+07

11/21 11/22 11/23 11/24 11/25 11/26 11/27 11/28 11/29 11/30 12/1

SE LAB

ENG-EAST

Humidifier

Running

Hard water atomized


Conclusions

• A network of OPCs was used to monitor particle concentration in an

indoor workplace environment

• Supermicron concentration correlated to human activity

– Clear relationship between specific activities and particle events

– Quantitative information was obtained

– Capable of detecting a single person passing within 20 ft

– Depends on floor surface (carpet vs. tile), sampling flow rate

– Applications; could be used for more efficient HVAC, building security,

or other human presence monitoring

• Submicron concentration was correlated to workplace sources

– Soldering, machining, heat sources, cleaning activities


Future Work

• Expanded Data Analysis Activities

– Relate indoor concentration to outdoor concentration for long-term study

– Cleanroom

• Cost saving initiatives; check effect of changes before/after

• Quantify the effect of weekly cleaning service

• Network Expansion

– DustTrak

– OPS 3330

– CPCs

– Temp/RH Monitoring


Thank You For Your Attention

Any Questions?

Jim Farnsworth

([email protected])

33


Webinar ScheduleApril 7th Emissions from Incinerators and Stacks

by Dr. Carsten Kykal

April 21st Scanning Mobility Particle Sizing: Key Factors for Accuracyby Kathy Erickson

May 5th Using TDMAs to Measure Haze by Tim Johnson

May 19th Electrospray with SMPS (ES+SMPS) for Size Measurements of Nanoparticles Suspended in Liquids by Dr. Stan Kaufman

June 23rd Indoor Exposure to Ultrafine Particles: Sources and Measurements by Dr. Lance Wallace

• Size resolution <5% at 0.5m

• User adjustable size channels

• Size range: 0.3 – 10m in up to

16 channels

• Wide concentration range

from 0 to 3000 particles/cm3

• Fully compliant with ISO

21501-01/04

Optical Particle Sizer Model 3330

TSI PARTICLE NEWS

www.tsi.com/webinars

US +1 651-490-2811 EURO +49 241-52303-0 ASIA + 86 10 8251 6588 [email protected]

New WCPC’s Models 3787 & 3788

• 2.5nm detection

• Single particle counting to

4x105 particles/cm3

• <100 ms rise-time response

w/ 42 ms time constant

(fastest CPC available)

• Convenient, eco-friendly water

as working fluid Model 3788

【東京ダイレック】TSI Webinar Continuous …...• Background and Motivation –Workplace...

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