Development of technology for visualization of hydrogen flame and hydrogen gas

Hydrogen Flame Visualization System

Fig.1 Hydrogen Flame Visualization System

Hydrogen Gas Visualization System

Fig.2 Hydrogen Gas Visualization System

Hydrogen Concentration Meter

Fig.3 Hydrogen Concentration Meter

Technology for visualization of hydrogen flame and hydrogen gas, which are colorless and transparent, was developed, and prototypes suited for practical use were constructed. Hydrogen flame is invisible, and judgement of ignition in outdoor environments is difficult. In this research, technology for visualization of hydrogen flame by selective imaging of the optical emission from the OH radical, which is present in hydrogen flames, was developed. A compact, portable device was constructed. In addition, experimental investigation on differential imaging using two wavelengths for suppression of the effect of background light was conducted, and the effects due to solar radiation and its reflection were successfully eliminated. Hydrogen gas does not possess absorption bands from the near ultraviolet to near infrared, so absorption spectroscopy, which is the conventional optical gas detection method, is not applicable. In this research, technology for visualization of hydrogen gas using Raman scattering was developed. Experimental investigation was also conducted on coherent anti-Stokes Raman scattering, which is applicable in the case in which a reflective object exists behind the hydrogen gas. Visualization of minute hydrogen gas leaks of 2 ml/min was achieved. Moreover, by simultaneous measurement of Raman scattering from atmospheric nitrogen and hydrogen gas, remote measurement of hydrogen gas concentration was achieved. A compact prototype of weight 10 kg, width 47 cm, depth 60 cm, and height 30 cm was developed.

Hydrogen energy is gaining attention as a clean energy source for the realization of a low carbon emission society. Safety measures for accidental troubles such as gas leaks are necessary and indispensable in hydrogen handling facilities. Methods for hydrogen flame detection include ultraviolet and infrared light imaging, and those for hydrogen gas detection include contact hydrogen sensors. However, there are issues such as false alarms due to reflection of solar radiation, low sensitivity, and dependence on the installed position of the sensors. The authors have developed the technology for remote detection and location of hydrogen flames, remote location of hydrogen gas leaks, remote measurement of hydrogen gas concentration, and constructed compact prototypes for each of the above purposes. This technology is innovative, and several reviewed papers have been published, which indicates its usefulness. The technology for visualization of hydrogen flames is useful for safety and accident prevention for extinguishing flames in the case of ignition. The technology for visualization of hydrogen gas is useful for safety monitoring of facilities, such as location of gas leakage detection in hydrogen fuel cells, hydrogen production facilities, and hydrogen fueling facilities. These technologies can be expected to be used effectively in the near future, with the introduction of hydrogen energy and the importance of safety measures in associated facilities.

In view of this progress, the Insitute of Electrical Engineers of Japan has awarded the IEEJ Academic Promotion Award (IEEJ Technical Development Award) in 2010 to Tetsuo Fukuchi (Central Research Institute of Electric Power Industry), Hideki Ninomiya and Kouji Ichikawa (Shikoku Research Institute).



Publications

[1] H. Ninomiya, S. Yaeshima, K. Ichikawa, T. Fukuchi、Raman lidar system for hydrogen gas detection、2007、Optical Engineering, Vol. 46, No. 9, 094301
[2] T. Fukuchi and H. Ninomiya、Visualization of Hydrogen Flame by Differential Imaging of OH Emission、2007、IEEJ Transactions on Electronics, Information and Systems, Vol. 127, No. 5, pp. 692-698.
[3] H. Ninomiya, S. Yaeshima, K. Ichikawa, and T. Fukuchi、Rama lidar system for hydrogen gas detection、2007、Optical Engineering, Vol. 46, No. 9, 094301
[4] T. Fukuchi and H. Ninomiya、Leak Detection of Hydrogen Gas Using Anti-Stokes Raman Scattering、2008、IEEJ Transactions on Electronics, Information and Systems, Vol. 128, No. 7, pp. 1192-1196.
[5] H. Ninomiya, I. Asahi, S. Sugimoto, and Y. Shimamoto、Development of Remote Sensing Technology for Hydrogen Gas Concentration Measurement Using Raman Scattering Effect、2009、IEEJ Transactions on Electronics, Information and Systems, Vol.129, No.7, pp.1181-1185.
[6] H. Ninomiya、Development of Remote Sensing System for Hydrogen Gas Concentration Distribution Measurement、2009、The Journal of Fuel Cell Technology, Vol.8, No.4, pp.97-102.
[7] H. Ninomiya、Development of Technology for Remote Detection of Hydrogen Gas Concentration、2009、Denki Genba Gijutsu, Vol.48, No.561, pp.33-37.
[8] I.. Asahi, H. Ninomiya, and S. Sugimoto、Remote Sensing of Hydrogen Concentration by Low Power Laser、2010、IEEJ Transactions on Electronics, Information and Systems, Vol.130, No.7, PP.1145-1150.

Related Researches

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Electricity & Electric Power
(New Technology for Energy)
Electricity & Electric Power
(Power System)

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