Experiment: Nguyen Group_20220412_None_Ammonium sulfate

Experiment

Name: Nguyen Group_20220412_None_Ammonium sulfate
Date: 2022-04-12

Organization
Nguyen Group

Chamber
Tran's big bag of air

Experiment Set
Particle wall loss experiments

Goals
Characterize wall loss of AS to dry chamber walls

Summary
Performed wall loss of dry AS for 6 hours

Experiment Details

Categories:

  • Instrument/Chamber characterization
Temperature: 22
Relative Humidity: 5
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value: 240
Seed Concentration Units: micrograms_per_cubic_meter
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 5
Reaction type:
Oxidant Name: None
Initial Oxidant Concentration Value: 0 (parts_per_million)
RO2 Main Fate: Not Sure
RO2 Lifetime: (Seconds)
Pressure: 755 Torr

Data Sets

ID Instrument File  
4507 SMPS - bulk, uncorrected 220412_bulkuncorr2.csv
4508 SMPS - size distributions 220412_numdata2.csv
4509 SMPS - particle wall loss rates 220412_walllossrate.csv

Data Set plots
Choose a file: Choose the X-Axis:

Experiment Set Details

Name: Particle wall loss experiments
Time format and units: HH:MM
Description:
Experiments to characterize the effects of various chamber parameters (light, humidity, temperature, particle liquid water content, seed aerosol chemistry, and recent chamber contents) on particle wall losses in a 10 m3 Teflon-walled atmospheric chamber.

Collaborators:

  • Kelvin H Bates

Download

Download this Experiment (52.38 KB)

Contacts

Principal investigator:

Tran B. Nguyen
Phone: 5307525987
E-mail: tbn@ucdavis.edu
OrcID: 0000-0001-9206-4359

Data Manager:

Kelvin H. Bates
E-mail: kelvinhbates@gmail.com

220412_Timeline.csv Timeline

Time (HH:MM) Action
10:29 RHT/NOx/O3 on
10:45 SMPS on
10:54 Seed injection starts
11:19 Seed injection ends (seed concentration is 240 ug/cm3)
11:21 10 mixing air bursts
11:22 Wall loss starts
16:43 Wall loss ends
16:43 RHT/Nox/O3 off
16:43 SMPS off

Citations
Publication associated with this experiment:

Characterizations
Light Flux Characterizations:
(None)
Particle Loss Characterizations:
(None)
Vapor Loss Characterizations:
(None)

Chamber Details

Name: Tran's big bag of air
Volume in cubic meters: 10
Shape: Rectangular Prism
Surface area in cubic meters: 28
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 2
Replacement date:
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on Oxidation
o3 background: < 0.5 ppb
nox background:
Particle background in micrograms per cubic meter:
Air filtration method: Custom filtration canisters to remove NOx, hydrocarbons, water, particles, ozone, SOx from pressurized ambient air.
Mixing method: 1
Mixing method material: Pulsed air jets, manually actuated
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius):
Temparature range (max degrees celcius):
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent):
Relative humidity range (max percent):
Particle experiment capability: 1
Lights: Yes
Light source type(s): UV broadband black lights (centered at 350 nm)
Supplemental information:
Additional Notes: 40-Watt, Osram/Sylvania 350nm black lights, 48” long, T12 fluorescent; 72 bulbs, 36 each on two facing walls, with UV-reflective siding on all walls. Lights are controlled via 6 panels (3 on the right wall - top, mid, bottom - and 3 equivalent on the left wall).