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태양광 발전의 전기차 사용 후 배터리 적용을 위한 ESS의 최적 용량 및 배터리 최대 가격 산정
채상헌(Sang Heon Chae),김일환(Eel-Hwan Kim) 한국조명·전기설비학회 2021 조명·전기설비학회논문지 Vol.35 No.11
Jeju Island, Republic of Korea, is the most active region for electric vehicles and renewable energy sources. However, in Jeju Island, the problems of wasted batteries from electric vehicles and the curtailment of renewable energy output already appeared. To solve this problem, there is a method to install and operate SLB(Second life battery from electric vehicle) with solar power generation. From this perspective, this paper proposes the optimal capacity calculation and maximum price calculation methods for ESS(Energy storage system) based SLB applied to solar power generation. The optimal capacity and maximum price of the SLB are derived based on the capacity and price of the new ESS. The proposed method was simulated based on the weather data actually measured in the Jeju area using the MATLAB program. As a result of the simulation, the optimal capacity of SLB was calculated as 389kWh for 200kW PV farm. To Install calculated SLB, 354SLB modules were required and its maximum price was decided as 132,000KRW.
폐기물 가스화 합성가스의 고온수성가스전이반응을 위한 Fe/Al/Cu 촉매의 제조방법에 따른 활성 비교 연구
김지은 ( Jee Eun Kim ),채상헌 ( Sang Heon Chae ),전경원 ( Kyung-won Jeon ),윤조희 ( Cho-hee Yoon ),류재용 ( Jae-yong Ryu ),장원준 ( Won-jun Jang ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회 추계학술발표논문집 Vol.2019 No.-
폐기물 가스화 합성가스로부터 수소를 생산하기 위해 다양한 제조방법으로 Fe/Al/Cu 촉매를 제조하고 고온수성가스전이반응에 적용하였다. Fe/Al/Cu 촉매는 함침법, 졸겔법, 그리고 공침법으로 제조되었다. 제조된 촉매 중 공침법으로 제조된 Fe/Al/Cu 촉매가 450 ℃에서 85% 이상의 높은 CO 전환율 및 안정성을 나타내었다. 공침법으로 제조된 Fe/Al/Cu 촉매의 뛰어난 성능은 높은 표면적, 작은 Fe<sub>3</sub>O<sub>4</sub> 결정 크기, 강한 산화환원능, 그리고 많은 Cu<sup>0</sup>에 기인한 결과이다.
Analysis of Pulse Width Modulation Schemes for Electric Vehicle Power Converters
Ngoc-Thinh Quach,Sang Heon Chae(채상헌),Eel-Hwan Kim(김일환),Seung-Yong Yang(양승용),Chang-Jin Boo(부창진),Ho-Chan Kim(김호찬) 대한전기학회 2016 전기학회논문지 Vol.65 No.12
In order to overcome the problem of fossil fuel energy, electric vehicle (EV) has been used in recent years. The important issues of EV are driving distance and lifetime related to EV efficiency. A voltage source converter is one of the main components of EV which can be operated with various pulse width modulation (PWM) schemes such as continuous PWM schemes and discontinuous PWM schemes. These PWM schemes will cause the effects on the efficiency of converter system and the lifetime of EV. Therefore, this paper proposes an analysis of the PWM schemes for the power converter on the EV. The objective is to find out a best solution for the EV by comparing the total harmonic distortion (THD) and transient response between the various PWM schemes. The operation of traction motor on the EV with the PWM schemes will be verified by using Psim simulation program.
겉뿌림을 위한 오차드그라스와 톨페스큐 종자의 코팅 및 펠렛팅 기술 비교
김종덕(Jong Duk Kim),권찬호(Chan Ho Kwon),채상헌(Sang Heon Chae),김종관(Jong Kwan Kim),김병완(Byong Wan Kim),서성(Sung Seo) 한국초지조사료학회 2007 한국초지조사료학회지 Vol.27 No.4
초지조성과 개량에서 겉뿌림은 중요한 방법중의 하나이다. 오늘날 겉뿌림 초지조성에서 종자피복기술은 관심이 높아지고 있다. 따라서 본 시험은 산지초지에서 겉뿌림조성시 목초의 출현율과 정착율을 높이기 위해 화본과목초종자의 피복기술을 개발하기 위하여 실시하였다. 종자 펠렛팅은 피복시간을 단축하고 단위시간당 피복량을 증가시킴으로서 종자피복의 새로운 기술로 평가되었다. 펠렛종자의 건조시간을 단축하고 건조온도를 낮춤으로서 화본과 목초종자의 발아세와 발아율이 증가하였다. 임간초지에서 펠렛종자는 종자의 출현, 정착 및 초기 생육을 향상시켰다. 이상의 시험결과를 볼 때 임간초지에서 종자 펠렛팅 기술은 화본과목초의 정착과 초기생육 향상을 위한 새로운 기술로 평가되었다. Surface sowing method is one of the important methods to establish seeds in mountainous area. Seedcoating technique in the surface sowing method is increasing interest in the world today. An experiment was conducted to develope a technique for pelleting seeds of grass in woodland. Results showed that the seed pelleting was a useful technique than coating seeds because the pelleting reduced coating time and increased amounts of coated seeds per hour. As lowering temperature and reducing time for drying, germinating energy and germination rate of pelleted seeds were improved. And emergence, establishment and early growth of pelleted were also improved in pasture under woodland. Based on this study, we could conclude that the seed pelleting is a useful technique for the establishment and early growth of grass under woodland.