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RISS 인기검색어
- 검색키워드
- 저자 : Shu-San Hsiau (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Effect of Electrolyte Concentration Difference on Hydrogen Production during PEM Electrolysis
Sun, Cheng-Wei,Hsiau, Shu-San The Korean Electrochemical Society 2018 Journal of electrochemical science and technology Vol.9 No.2
Proton exchange membrane (PEM) water electrolysis systems offer several advantages over traditional technologies including higher energy efficiency, higher production rates, and more compact design. In this study, all the experiments were performed with a self-designed PEM electrolyser operated at 1 atm and $25^{\circ}C$. Two types of electrolyte were used: (i) potassium hydroxide (KOH), and (ii) sulfuric acid ($H_2SO_4$). In the experiments, the voltage, current, and time were measured. The concentration of the electrolyte significantly affected the electrolyser performance. Overall the best case was with 15 wt% $H_2SO_4$ at the anode channel and 20 wt% at the cathode channel with. In addition, increasing the difference in concentration of the sulfuric acid had an effect on the diffusion. The diffusion flux became larger when the difference in concentration became larger, increasing electrolyser efficiency without the addition of extra energy.
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SAFE TECHNOLOGY WITH A NOVEL REAR COLLISION AVOIDANCE SYSTEM OF VEHICLES
Yi-Shun Chen,Sheng-Chien Chiu,Shu-San Hsiau 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.4
This study aims to reduce the severity of injuries caused by and the frequency of rear-end vehicle collisions. A better collision prediction method is proposed by means of millimeter-wave radar sensors able to rapidly detect potential collisions and alert drivers. Implementation of the system would bring about a reduction in accidents and potentially reduce the severity of the accidents that cannot be avoided. The proposed collision avoidance system adopted millimeter-wave radar sensors to collect information on vehicle’s rear surroundings. The designed experimental device has several unique features. The device has a wide monitoring range, incorporates a continuous detection process, and contains a rapid warning system. A series of real-world experiments were performed on cars (Model: Tercel 1.5, Toyota) to demonstrate the monitoring efficiency and warning frequency of this device under several operating conditions. This study furthered the development of a safe technology for avoidance of rear-end collisions, and this offers a novel system which can be used in a variety of vehicles to reduce the frequency of rear-end vehicle collisions.
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