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건물용 연료전지 발전 건물용 연료전지 시스템 개발 현황
전희권 ( Hee Kwon Jun ),이수재 ( Soo Jae Lee ),이동활 ( Dong Hwal Lee ),최청훈 ( Choeng Hoon Choi ),김민석 ( Min Seok Kim ),배석정 ( Suck Jung Bae ) 한국공업화학회 2011 공업화학전망 Vol.14 No.2
지속적으로 증가하고 있는 에너지 수요에 대처하기 위해 신재생에너지 기술 확보를 위한 노력이 계속되고 있다. 연료전지는 풍력, 태양전지와는 달리 환경적 제약 없이 연속적인 에너지 공급이 가능하여 건물용 분산발전용으로 적합한 요건을 갖추고 있다. 최근 시작된 시범보급 사업으로 건물용 연료전지의 초기 시장 진출이 시작되었고 공공기관 대체에너지의무화와 그린홈 보급사업 시행으로 시장 확대가 기대된다. 본 논문에서는 건물용 연료전지 시스템의 기본원리와 국내외 개발 동향에 대해 살펴보았으며 핵심부품에 대한 기술개발 현황에 대해 기술하였다.
전희권(Jun, Hee-Kwon),황정태(Hwang, Jung-Tae),이갑식(Lee, Kap-Sik),최청훈(Choi, Choeng-Hoon),이동활(Lee, Dong-Hwal),배준강(Bae, Joon-Kang) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
1 kW class Polymer Electrolyte Fuel Cell(PEFC) co-generation systems have been developed from 2001 and evaluated for improvement of efficiency, durability and reliability of the system. This paper introduce new version system including with excellent reliability, durability and user friendly applications. Its electrical and overall efficiency showed 35 % and 80 %, respectively, and noise level of the system was less than 45 dB. In addition, this system have various functions such as load change, N₂ less purge, low emission and low temperature operation (-15?C) through development of operation logic. This system was designed for convenient installation in indoor and outdoor due to the compactness of size and the separation of electrical and heat recovery units, which means a user can select the size of heat recovery unit.
신동원,이상태,전희권,이덕동,임정옥,허증수,Shin, D.W.,Lee, S.T.,Jun, H.K.,Lee, D.D.,Lim, J.O.,Huh, J.S. 한국재료학회 2003 한국재료학회지 Vol.13 No.2
Nano-sized powders of Indium Tin Oxide(ITO) were synthesized by a coprecipitation method. In order to investigate the gas sensing characteristics in the nanocrystalline ITO thick films with various particle sizes, ITO powders with the average particle diameter of 15, 30, and 70 nm respectively were synthesized. And the sensitivity of ITO thick films was measured upon exposure to a target gas($C_2$$H_{5}$ /OH) and some other Volatile Organic Compounds(VOCs), such as, toluene, methanol, benzene, chloroform. As a result, ITO thick films had high sensitivity for ethanol and higher sensitivity with smaller particle size.
Impedance를 이용한 전도성고분자 센서의 에탄올 가스 감응특성
이경문,유준부,전희권,이병수,이덕동,허증수,Lee, Kyung-Mun,Yu, Joon-Boo,Jun, Hee-Kwon,Lee, Byung-Soo,Lee, Duk-Dong,Huh, Jeung-Soo 한국재료학회 2003 한국재료학회지 Vol.13 No.3
The polypyrrole and polyaniline thin film sensors which were made by chemical polymerization were employed to detect ethanol gas. With a single sensor element we can obtain characteristic patterns of behaviour across a very wide frequency range when measuring either resistance or capacitance. Impedance spectroscopy was employed to study the gas sensing behavior of both capacitance and resistance based sensors with conducting polymer as the active sensing element.
스크린 인쇄법을 이용한 NASICON 후막 SO<sub>2</sub>가스 센서의 제조 및 특성
배재철,이상태,전희권,방영일,이덕동,허증수,Bae, J.C.,Lee, S.T.,Jun, H.K.,Bang, Y.I.,Lee, D.D.,Huh, J.S. 한국재료학회 2003 한국재료학회지 Vol.13 No.2
The thick film type sensor having Pt/Na Super Ionic Conductor(NASICON) solid electrolyte/Pt/$Na_2$$SO_4$/Pt catalyst system for $SO_2$gas was fabricated by screen-print method. The phase of Na Super Ionic Conductor solid electrolyte sintered at different temperature of 1050, 1150,$ 1250^{\circ}C$ and for different time of 1.5, 2.5, 3.5 hr were investigated by XRD. The Electromotive Force variation of the sensor with $SO_2$concentrations and operating temperatures were investigated. The major phase of Na Super Ionic Conductor film sintered at 115$0^{\circ}C$ for 3.5 hr was sodium zirconium silicon phosphate($Na_3$Zr$_2$$Si_2$PO$_{12}$). The Nernst's slope of Na Super Ionic Conductor sensor for $SO_2$gas with the variation of concentration from 10 to 100 ppm was 167.14 ㎷/decade at the operating temperature of $500 ^{\circ}C$. The increase of oxygen partial pressure was not affected to the variation of Nernst's slope.e.
Methanol 가스에 대한 고분자 센서의 온도와 습도 영향 고찰
이경문,허용수,전희권,손성옥,허증수,Lee, K.M.,Hoh, Y.S.,Jun, H.K.,Sohn, S.O.,Huh, J.S. 한국재료학회 2003 한국재료학회지 Vol.13 No.12
The polypyrrole prepared with pyrrole monomer, APS and DBSA was synthesized by chemical Polymerization at $V^{\circ}C$ under atmosphere conditions. After dissolving polypyrrole powder to the chloroform including DBSA, polypyrrole film was prepared on the alumina substrate with an interdigitated electrode by using the dip-coating method. This film was soaked in methanol solvent for 1 h at room temperature and heated to $70^{\circ}C$ for 4 h in $N_2$. Initial resistance was increased with the increasing humidity and decreasing temperature. The sensitivity was increased with lower humidity and decreasing temperature. The best linearity was achieved at $25^{\circ}C$ and low humidity of 0%.
차정은(Cha, Jung-Eun),전희권(Jun, Hee-Kwon),박정주(Park, Jung-Joo),고윤택(Ko, Youn-Taek),황정태(Hwang, Jung-Tae),장원철(Chang, Won-Chol),김진영(Kim, Jin-Young),김태원(Kim, Tae-Won),김인기(Kim, In-Ki),정영식(Jeong, Young-Sik),갈한주(K 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
To extract hydrogen for stack, fuels such as LPG and LNG were reformed in the fuel processor, which is comprised of desulfurizer, reformer, shift converter, CO remover and steam generator. All elements of fuel processor are integrated in a single package. Highly active catalysts (desulfurizing adsorbent, reforming catalyst, CO shift catalyst, CO removal catalyst) and the various burners were developed and evaluated in this study. The performance of the developed catalysts and the commercial ones was similar. 1 kW, 5 kW class fuel processor systems using the developed catalyst and burner showed efficiency of 75 %(LHV, for LNG). The start-up time of the 1 kW class fuel processor was less than 50 minutes and its volume including insulation was about 30 l. The start-up time of 3 kW and 5 kW class fuel processors with the volume of 90 l and 150 l, respectively, was about 60 minutes. In the case of LPG fuel, efficiency, volume and start-up time of 1kW class fuel processor showed 73 %(LHV), < 60 l and < 60 min, respectively. Advanced fuel processor showed more highly efficiency and shorter start-up time due to the improvement of heat exchanger and operating method. 1 kW and 3 kW class fuel processors have been evaluated for reliability and durability including with on/off test of developed catalysts and burner.
김민석(Kim, Minseok),이선호(Lee, Sunho),전희권(Jun, Heekwon),배준강(Bea, Junkang) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
For stationary 1kW-class fuel cell systems to be used widely, it is essential to achieve dramatic improvements in system durability as well as cost reduction. In order to address this engineering challenge, it is important to develop innovative technologies associated with BOP components. According to this background, in 2009, the Korean Government and Korea Institute of Energy Technology Evaluation and Planning(KETEP) launched into the strategic development project of BOP technology for practical applications and commercializations of stationary fuel cell systems, named Technology Development on Cost Reduction of BOP Components for 1kW Stationary Fuel Cell Systems to Promote Green-Home Dissemination Project. The objectives of this project are to develop fundamental technologies to meet these requirements, and to improve the performance and functionality of BOP components with reasonable price. The project consortium consists of Korea's leading fuel cell system manufacturers, BOP component manufacturers which technologically specialized, and several research institutions. This paper is to provide a summary of the project, as well as the achievements made through the 1st period of the project(2009~2010). Several prototypes of BOPs - Cathode air blowers, burner air blowers, preferential oxidation air blowers, fuel blowers, cooling water pumps, reformer water pumps, heat recovery pumps, mass flow meters, valves and power conditioning systems - had been developed through this project in 2010. As results of this project, it is expected that a technological breakthrough of these BOP components will result in a substantial system cost reduction.