High-speed tunable diode laser absorption spectroscopy for sampling-free in-cylinder water vapor concentration measurements in an optical IC engine

2012 ◽  
Vol 109 (3) ◽  
pp. 521-532 ◽  
Author(s):  
O. Witzel ◽  
A. Klein ◽  
S. Wagner ◽  
C. Meffert ◽  
C. Schulz ◽  
...  
Keyword(s):  
Water Vapor ◽  
Diode Laser ◽  
Absorption Spectroscopy ◽  
High Speed ◽  
Tunable Diode Laser ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Ic Engine ◽  
Laser Absorption ◽  
Diode Laser Absorption

Optical Remote Sensing of Oxygen and Water Vapor Concentration in PEMFC Channel by Using Tunable Diode Laser Absorption Spectroscopy Techniques

2007 ◽  
Author(s):  
Yoshinobu Fujii ◽  
Shohji Tsushima ◽  
Shuichiro Hirai
Keyword(s):  
Remote Sensing ◽  
Water Vapor ◽  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Tunable Diode Laser ◽  
Vapor Concentration ◽  
Optical Remote Sensing ◽  
Water Vapor Concentration ◽  
Laser Absorption ◽  
Diode Laser Absorption

In this study, we present optical remote sensing of oxygen and water vapor concentration in gas flow channels in an operating polymer electrolyte membrane fuel cell (PEMFC) by using Tunable Diode Laser Absorption Spectroscopy (TDLAS). Wavelengths of the diode laser are 1392nm for measurement of water vapor concentration and 760nm for measurement of oxygen concentration, respectively. We demonstrated that the optical remote sensing based on TDLAS techniques could detect variation of oxygen and water vapor concentration in the PEMFC channel.

Measurements of the temperature and water vapor concentration in a hot zone by tunable diode laser absorption spectrometry

2010 ◽  
Vol 100 (2) ◽  
pp. 397-407 ◽  
Author(s):  
M. A. Bolshov ◽  
Y. A. Kuritsyn ◽  
V. V. Liger ◽  
V. R. Mironenko ◽  
S. B. Leonov ◽  
...  
Keyword(s):  
Water Vapor ◽  
Diode Laser ◽  
Absorption Spectrometry ◽  
Tunable Diode Laser ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Laser Absorption ◽  
Diode Laser Absorption ◽  
Hot Zone

Evaluation of tunable diode laser absorption spectroscopy for in‐process water vapor mass flux measurements during freeze drying

2007 ◽  
Vol 96 (7) ◽  
pp. 1776-1793 ◽  
Author(s):  
Henning Gieseler ◽  
William J. Kessler ◽  
Michael Finson ◽  
Steven J. Davis ◽  
Phillip A. Mulhall ◽  
...  
Keyword(s):  
Water Vapor ◽  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Mass Flux ◽  
Freeze Drying ◽  
Tunable Diode Laser ◽  
Laser Absorption ◽  
Flux Measurements ◽  
Diode Laser Absorption ◽  
Vapor Mass
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