TSI 3098 Porous Tube Thermodiluter

Description of TSI 3098

The Porous Tube Thermodiluter (PTT) 3098 is the next generation sample conditioning system specifically designed for the Engine Exhaust Particle Sizer™ (EEPS™) 3090 to characterize advanced combustion designs and solid particle emissions from modern engines, either before or after emission control devices. The PTT design has no moving parts and mimics the atmospheric dilution process eliminating the potential of particle interaction with the diluter walls. This coupled with operating at a high flow rate minimizes losses of the sub-23 nm particles, improving the response time and accuracy of the number concentration measurement provided by the EEPS™ spectrometer. The PTT can be addressed through the user friendly EEPS™ software that has been extended to fully control the complete system, or it can be integrated in the test bench host system through AK-protocol.

Features and Benefits

• Robust dilution design: porous tube diluters without moving parts to wear out or small orifices to clog
• PMP-type (hot dilution-catalytic stripper-cold dilution) sample conditioning at ambient pressure for measurement of solid particles
• Low thermophoretic and diffusional losses that are corrected for in the measured size distribution by the EEPS spectrometer
• Low cost of ownership with swappable flow controller module (only flow control module needs to be calibrated annually)
• AK-serial command protocol for integration in test cell systems with host controller
• Reliable and accurate dilution performance: well controlled/ stable/accurate dynamic dilution ratio
• Easy to use: Integrated control of PTT and EEPS spectrometer from single user interface

Applications

• Sub-23 nm solid particle emissions for post Euro 6/VI engines
• Cold start engine emissions in Gasoline Direct Injection (GDI) engines
• Exhaust after-treatment (DPF or GPF) characterization
• Pre-DPF/GPF sampling with optional Pressure Reducing Module (PN 3098-PR)
• Non-exhaust nanoparticle emissions (brake and tire wear)
• Measurement of non-volatile particulate matter (PM) emissions from aircraft turbine engines
• Non-road mobile machinery emissions

Technical specifications of TSI 3098

Particle Size Range

• 5 to 560 nm

Particle Concentration Range

• Up to 1×109 P/cc at inlet of primary diluter with 500:1 total dilution ratio

Inlet Sample Flow Rate

• 0.25 to 5 L/min (determined by dilution ratio and temperature/pressure conditions)

Diluted Flow Rate

• 10 L/min

Dilution Ratio Range

• 10:1 to 500:1

Differential Pressure

• +100 to -80 mbar without pressure reducing accessory < 3 bar with optional pressure reducing module

Raw Gas Temperature Range

• 0 to 500°C (consult with factory for higher temperatures)

Response Time

• < 1.8 sec T10 to T90 (complete system; response time based on total number concentration response)

Output Data Rate

• 10 Hz

Heated Sample Line Temperature

• OFF to 200°C (default is 150°C)

Particle Penetration

• Size dependent penetration determined experimentally from 5.6 nm to 560 nm for the complete system at nominal operating conditions (heated sample line at 150°C and catalytic stripper at 350°C). Particle penetration correction applied to EEPS spectrometer size distribution.

Volatile Particle Remover

• > 99% removal at 30 nm with tetracontane

Operating Temperature

• 0 to 40°C

Operating Ambient Pressure

• 70 to 103 kPa

Humidity

• 0-90% RH (non-condensing)

Dilution Air Supply Requirements

• Air or N2 @ 80 psi and 25°C; ~30 SLPM

Communications

• Diluter to PC: RS232 with serial commands. AK protocol via Ethernet EEPS to Diluter: RS232 serial commands

Size at Base (H x W x D)

• 1.65 m x 0.55 m x 0.82 m

Weight

• 140 kg (308 lb)

Sample Inlet

• 1/4-in for raw undiluted gas

Power Requirements

• 100-120 VAC, 50/60 Hz or 200-240 VAC, 50/60 Hz; < 1500 W