Numerical assessment of mixing of humid air streams in three-way junctions and impact on volume condensation

2021 ◽  
pp. 117676
Author(s):  
J. Galindo ◽  
A. Gil ◽  
R. Navarro ◽  
G. García-Olivas
Keyword(s):  
Humid Air ◽  
Numerical Assessment ◽  
Volume Condensation ◽  
Air Streams

Dynamic behavior of single glycerol droplets in humid air streams

Langmuir ◽  
1989 ◽  
Vol 5 (1) ◽  
pp. 133-140 ◽  
Author(s):  
A. K. Ray ◽  
R. D. Johnson ◽  
A. Souyri
Keyword(s):  
Dynamic Behavior ◽  
Humid Air ◽  
Air Streams

scholarly journals Development and verification of an in-flow water condensation model for 3D-CFD simulations of humid air streams mixing

2018 ◽  
Vol 167 ◽  
pp. 158-165 ◽  
Author(s):  
J.R. Serrano ◽  
P. Piqueras ◽  
R. Navarro ◽  
D. Tarí ◽  
C.M. Meano
Keyword(s):  
Cfd Simulations ◽  
Humid Air ◽  
Water Condensation ◽  
Condensation Model ◽  
Air Streams

Concomitant Adsorption and Desorption of Organic Vapor in Dry and Humid Air Streams using Microwave and Direct Electrothermal Swing Adsorption

2008 ◽  
Vol 42 (24) ◽  
pp. 9317-9322 ◽  
Author(s):  
Zaher Hashisho ◽  
Hamidreza Emamipour ◽  
Mark J. Rood ◽  
K. James Hay ◽  
Byung J. Kim ◽  
...  
Keyword(s):  
Humid Air ◽  
Adsorption And Desorption ◽  
Organic Vapor ◽  
Electrothermal Swing Adsorption ◽  
Air Streams

Selective Removal of Methanol from Humid Air Streams Using a Water-Vapor-Purged Membrane Separator

2001 ◽  
Vol 40 (12) ◽  
pp. 2685-2692
Author(s):  
Arto Klug ◽  
Peter H. Pfromm ◽  
Mary E. Rezac ◽  
Peter Czermak
Keyword(s):  
Water Vapor ◽  
Selective Removal ◽  
Humid Air ◽  
Membrane Separator ◽  
Air Streams

scholarly journals Accurate measurements of carbon monoxide in humid air using the cavity ring-down spectroscopy (CRDS) technique

2012 ◽  
Vol 5 (5) ◽  
pp. 6493-6517 ◽  
Author(s):  
H. Chen ◽  
A. Karion ◽  
C. W. Rella ◽  
J. Winderlich ◽  
C. Gerbig ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Water Vapor ◽  
Near Infrared ◽  
Infrared Region ◽  
Humid Air ◽  
Cavity Ring Down Spectroscopy ◽  
Carbon Dioxide Co2 ◽  
Air Streams ◽  
Line Interference ◽  
Cavity Ring Down

Abstract. Accurate measurements of carbon monoxide (CO) in humid air have been made using the cavity ring-down spectroscopy (CRDS) technique. The measurements of CO mole fractions are determined from the strength of its spectral absorption in the near infrared region (∼1.57 μm) after removing interferences from adjacent carbon dioxide (CO2) and water vapor (H2O) absorption lines. Water correction functions that account for the dilution and pressure-broadening effects as well as absorption line interferences from adjacent CO2 and H2O lines have been derived for CO2 mole fractions between 360–390 ppm. The line interference corrections are independent of CO mole fractions. The dependence of the line interference correction on CO2 abundance is estimated to be approximately −0.3 ppb/100 ppm CO2 for dry mole fractions of CO. Comparisons of water correction functions from different analyzers of the same type show significant differences, making it necessary to perform instrument-specific water tests for each individual analyzer. The CRDS analyzer was flown on an aircraft in Alaska from April to November in 2011, and the accuracy of the CO measurements by the CRDS analyzer has been validated against discrete NOAA/ESRL flask sample measurements made on board the same aircraft, with a mean difference between integrated in situ and flask measurements of −0.6 ppb and a standard deviation of 2.8 ppb. Preliminary testing of CRDS instrumentation that employs new spectroscopic analysis (available since the beginning of 2012) indicates a smaller water vapor dependence than the models discussed here, but more work is necessary to fully validate the performance. The CRDS technique provides an accurate and low-maintenance method of monitoring the atmospheric dry mole fractions of CO in humid air streams.

scholarly journals Accurate measurements of carbon monoxide in humid air using the cavity ring-down spectroscopy (CRDS) technique

2013 ◽  
Vol 6 (4) ◽  
pp. 1031-1040 ◽  
Author(s):  
H. Chen ◽  
A. Karion ◽  
C. W. Rella ◽  
J. Winderlich ◽  
C. Gerbig ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Water Vapor ◽  
Near Infrared ◽  
Infrared Region ◽  
Humid Air ◽  
Cavity Ring Down Spectroscopy ◽  
Carbon Dioxide Co2 ◽  
Air Streams ◽  
Line Interference ◽  
Cavity Ring Down

Abstract. Accurate measurements of carbon monoxide (CO) in humid air have been made using the cavity ring-down spectroscopy (CRDS) technique. The measurements of CO mole fractions are determined from the strength of its spectral absorption in the near-infrared region (~1.57 μm) after removing interferences from adjacent carbon dioxide (CO2) and water vapor (H2O) absorption lines. Water correction functions that account for the dilution and pressure-broadening effects as well as absorption line interferences from adjacent CO2 and H2O lines have been derived for CO2 mole fractions between 360–390 ppm and for reported H2O mole fractions between 0–4%. The line interference corrections are independent of CO mole fractions. The dependence of the line interference correction on CO2 abundance is estimated to be approximately −0.3 ppb/100 ppm CO2 for dry mole fractions of CO. Comparisons of water correction functions from different analyzers of the same type show significant differences, making it necessary to perform instrument-specific water tests for each individual analyzer. The CRDS analyzer was flown on an aircraft in Alaska from April to November in 2011, and the accuracy of the CO measurements by the CRDS analyzer has been validated against discrete NOAA/ESRL flask sample measurements made on board the same aircraft, with a mean difference between integrated in situ and flask measurements of −0.6 ppb and a standard deviation of 2.8 ppb. Preliminary testing of CRDS instrumentation that employs improved spectroscopic model functions for CO2, H2O, and CO to fit the raw spectral data (available since the beginning of 2012) indicates a smaller water vapor dependence than the models discussed here, but more work is necessary to fully validate the performance. The CRDS technique provides an accurate and low-maintenance method of monitoring the atmospheric dry mole fractions of CO in humid air streams.

Cryo-TEM of amphiphilic polymer and amphiphile/polymer solutions

1993 ◽  
Vol 51 ◽  
pp. 876-877
Author(s):  
Yeshayahu Talmon
Keyword(s):  
Microstructural Characterization ◽  
Building Blocks ◽  
Quantitative Information ◽  
Physical Models ◽  
Specimen Preparation ◽  
Time Resolved ◽  
Temperature Changes ◽  
Temperature And Humidity ◽  
Microstructured Fluids ◽  
Air Streams

To achieve complete microstructural characterization of self-aggregating systems, one needs direct images in addition to quantitative information from non-imaging, e.g., scattering or Theological measurements, techniques. Cryo-TEM enables us to image fluid microstructures at better than one nanometer resolution, with minimal specimen preparation artifacts. Direct images are used to determine the “building blocks” of the fluid microstructure; these are used to build reliable physical models with which quantitative information from techniques such as small-angle x-ray or neutron scattering can be analyzed.To prepare vitrified specimens of microstructured fluids, we have developed the Controlled Environment Vitrification System (CEVS), that enables us to prepare samples under controlled temperature and humidity conditions, thus minimizing microstructural rearrangement due to volatile evaporation or temperature changes. The CEVS may be used to trigger on-the-grid processes to induce formation of new phases, or to study intermediate, transient structures during change of phase (“time-resolved cryo-TEM”). Recently we have developed a new CEVS, where temperature and humidity are controlled by continuous flow of a mixture of humidified and dry air streams.

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