1 1Vibrating Orifice Monodisperse Aerosol Generator VOMAG 1

1. 奈米微粒產生技術 (1)Vibrating Orifice Monodisperse Aerosol Generator (VOMAG) 1 國立宜蘭大學

VOMAG—Model 3450 國立宜蘭大學 2

Principle of Operation 國立宜蘭大學 3

(2)Model 3076 Constant Output Atomizer 國立宜蘭大學 4

(3)Model 3480 Electrospray Aerosol Generator 國立宜蘭大學 7

l. Dripping mode l. Pulsating mode l. Cone-Jet mode l. Corona Discharge mode 國立宜蘭大學 8

3. 大氣微粒粒徑分析技術 (1)Model 3936 SMPS (Scanning Mobility Particle Sizer) 國立宜蘭大學 9

(2)Condensation Particle Counters • 3010 • 3022 • 3025 Particle detection down to 10 nm Particle detection down to 7 nm Particle detection down to 3 nm 國立宜蘭大學 12

Condensation Particle Counter Model 3010 The Model 3010 CPC measures the number concentration of individual particles that are 0. 01 µm in diameter and larger. The particles are detected by condensing alcohol vapor onto the particles, causing them to grow into droplets. These particles, in droplet form, are easily counted by a simple optical particle detector. 國立宜蘭大學 13

Model 3010 CPC Flow Schematic 國立宜蘭大學 14

(3)Aerodynamic Particle sizer 國立宜蘭大學 15

• Particle size range: 0. 5 to 20 µm aerodynamic size, 0. 37 to 20 µm optical detection (PSL equivalent) • Aerodynamic size resolution: 0. 02 µm at 1. 0 µm diameter, 0. 03 µm at 10 µm diameter 國立宜蘭大學 16

(4)Model 3071 A Electrostatic Classifier 國立宜蘭大學 18

A. Operating the Classifier • As an Aerosol Generator (Overpressure System) • Electrostatic Classifier as a Charge Spectrometer (Underpressure System) • Electrostatic Classifier as a Particle Size Analyzer • Electrostatic Classifier as an Aerosol Sampler • Preparing the Liquid Atomizer 國立宜蘭大學 20

As an Aerosol Generator • Range from 0. 1 -1 um • Diameter can be controlled Within 2% • Concentration within 5% 國立宜蘭大學 21

As a Charge Spectrometer 國立宜蘭大學 22

As an Aerosol Sampler • Replace spectrometer with filtration device or a thermal or electrostatic precipiator • When in high-resolution mode, only a very small fraction of aerosol is extration. aerosol: clean airflow=1: 10 8% increasing the ratio higher conc. Can be sampled. • Before sampling, first estimate the time 國立宜蘭大學 23

(5) Electrical low-pressure impactor 國立宜蘭大學 24

Outdoor air ELPI Flow rate : 30 lpm 國立宜蘭大學 25

(6)EEPS(Engine Exhaust Particle Sizer) New TSI EEPSTM model 3090 TM 國立宜蘭大學 27

Testing EEPS response 國立宜蘭大學 28

EEPS Time Response 國立宜蘭大學 29

Sampling Setup for Engine Test Temperature Controller HEPA Filter Heated Compressed Air Supply Line Pressure Gauge Exhaust Pipe Primary Orifice Sampling Probe Primary Ejector Pump Air Pressure Regulator Ice Bath with a cooling Coil Air Inlet Thermocouple Insulated Variable Residence Time section HEPA Filter Air Pressure Regulator Compressed Air Inlet Compressed Air Supply Line Pressure Gauge Retractable Tube Thermocouple Silica Gel Dryer Overflow Bypass Secondary Orifice Secondary Ejector Pump Tygon Flexible Tube To particle and emissions instruments Engine: John Deere 4045 國立宜蘭大學 30