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변동비반영 발전경쟁시장에서 LNG-복합 화력발전소의 경제성 분석에 관한 연구
李天豪(Cheon-Ho Lee),韓錫萬(Seok-Man Han),鄭求亨(Koo-Hyung Chung),姜東周(Dong-Ju Kang),金發鎬(Balho H. Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.8
Since Cost Based Pool markets has been continued to power markets, Genco. needs economic analysis about investment in power plants. Particularly most Private Genco.s have presently a construction plan about LNG combined cycle thermal power plants. In this paper, we propose a economic analysis method of LNG combined cycle thermal power plants using Economic Dispatch and Optimal Power Flow in CBP markets. Also we develope computation model using it for decision making to build a plant. This method can consider a variation of power facility like power plants and transmission lines in CBP markets. Finally, this dissertation provides a relevant case study to confirm the effect of cost factor to economical efficiency.
지구성 운동 시 운동자각도 및 피로물질에 미치는 L-arginine의 효과
이천호(Lee Cheon-Ho),최성근(Choi Sung-Keun),정승삼(Joung Seung-Sam),최승욱(Choi Seung-Wook) 한국체육과학회 2010 한국체육과학회지 Vol.19 No.1
The purpose of this study was to investigate the effect of administration of L-arginine on rating of perceived exertion and fatigue material during endurance exercise. Methods : The subjects of this study were six elite swimmer. All six swimmer were performed to do cycle ergometer exercise in the laboratory and it has been measured repetitively in 6 weeks of interval. Each experimental exercise were monitored and analyzed the change of fatigue material. Rating of perceived exertion decreased significantly in L-arginine administration group than in placebo group at 50 min and 60min(p<.05). The amount of lactate concentration decreased significantly in L-arginine administration group than in placebo group at 45min and 60min(p<.05). The amount of ammonia concentration decreased significantly in L-arginine administration group than in placebo group each time blood sample was collected(p<.05). therefore, These results show that L-arginine administration could increase exercise performance and decrease fatigue material in endurance exercise.
VO₂max로 본 수영선수의 저 수온 환경적응에 관한 연구
이천호(Lee Cheon-Ho),최승욱(Choi Seung-Wook),김현경(Kim Hyun-Kyung) 한국체육과학회 2003 한국체육과학회지 Vol.12 No.2
??The temperature of the body is determined by the temperature of the water, the swimming speed and the percentage of the subcutaneous fat. For this specific experiment, we asked the testee bring out the maximum exercise of their own and as a result, the load swimming speed and the percentage of the subcutaneous fat remained constant. Therefore the main factor that determines the temperature of the body is the temperature of the water. So to speak, the temperature of the body for the testee group and the controller group went down as the temperature of the water went to 33℃~23℃.<br/> ??As the temperature of the water went down, it slowed down the muscular movement and decreased the consumption of air below to the maximum. The skin, however, deemed to prevent the lowering of the temperature of the body. As a result of this experiment, it is assumed that the primary factors for the changes in VO₂nax were caused by the coordination of breathing, circulation, and the muscles.
규칙적인 운동과 F1, 6DP의 투여가 유산소지구력 및 항산화능에 미치는 영향
이종우(Lee Jong-Woo),하민수(Ha Min-Soo),이천호(Lee Cheon-Ho),박석(Park Sok) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.3
This study investigated effects of regular exercise and F1, 6DP supplement on endurance exercise capacity and antioxidant capacity in rats. Male Sprague-Dawley rats were randomly assigned to one eight groups(n=8): sedentary control group, exercied control group, F1, 6DP supplemented group and exercised F1, 6DP supplement group. F1, 6DP supplemented group, and exercsied F1, 6DP supplement group. Rats were fed experimental diets supplemented with F1, 6DP at the level of 10 ㎎/㎏/day for 4 weeks. Rats of exercised control group, F16-DP supplemented group and exercised F1, 6DP supplement exercised groups performed swimming exercise training at 60 min/day for 4 weeks. Exhaustive swimming time(endurance exercise capacity) was significantly increased in exercised control group, F1, 6DP supplemented group, and exercised F1, 6DP supplement group compared to the value for sedentary control group. Total antioxidant capacity was significantly higher in exercised control group, F1, 6DP supplemented group, and exercised F1, 6DP supplement group than sedentary control group. Free radical release was significantly lower in exercised control group FI, 6DP supplemented group, and exercised F1, 6DP supplement group than sedentary control group, These results indicate that F1, 6DP appear to be effective in enhancing enduranced exercised performance and antioxidant capacity of trained rats.
The Study of Fuel Properties for Biodiesel Derived from Duck's Oil
임영관(Lim, Young-Kwan),이천호(Lee, Cheon-Ho),정충섭(Jung, Choong-Sub),임의순(Yim, Euisoon) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
Biodiesel was well known for eco-friendly alternative fuel for petrodiesel. But biodiesel have disadvantage such like it was derived from food resource which was high price. In this study, We synthesized the biodiesel from duck's oil which was food trash via transesterification under base catalyst. After analytic result of density, kinematic viscosity, cold temperature characteristics, lubricity and cetane number which were main fuel characteristics, this duck's biodiesel have enough to fuel specification for except of domestic winter season.
임영관 ( Young Kwan Lim ),이천호 ( Cheon Ho Lee ),정충섭 ( Choong Sub Jung ),임의순 ( Eui Soon Yim ) 한국공업화학회 2010 공업화학 Vol.21 No.6
바이오디젤은 기존석유디젤을 대체할 수 있는 친환경적인 연료로 알려져 있다. 하지만 원료물질이 대부분 가격이 높은 식량자원을 이용한다는 단점을 지니고 있다. 본 연구에서는 음식쓰레기로 생긴 오리기름을 전처리 한 후, 염기촉매를 이용하여 전이에스테르화 반응을 통해 바이오디젤을 합성하였다. 합성되어진 바이오디젤의 대표적 연료특성으로 밀도, 동점도, 저온특성, 윤활성, 세탄가를 분석한 결과, 국내에서 동절기 외에는 충분히 석유대체연료로 사용 가능하다는 결과를 얻었다. Biodiesel is well known for an eco-friendly alternative fuel for petrodiesel. But biodiesel has a disadvantage since it is derived from expensive food resource. In this study, we synthesized the biodiesel from duck`s oil which was food trash via transesterification under base catalyst. After analytic result of density, kinematic viscosity, cold temperature characteristics, lubricity and cetane number which were main fuel characteristics, this duck`s biodiesel has enough potential to use as fuel except only domestic winter season.
김종혁(jong-hyuk Kim),이천호(cheon-ho Lee),한석만(seok-man Han),정구형(koo-hyung Chung),강동주(dong-joo Kang),김발호(bal-ho Kim) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
전력산업의 효율성 증가를 목적으로 경쟁적 선력시장의 도업을 활발히 추진하고 있다. 이와 관련하여 계통운영의 효율성 확보, 합리적인 요율체계의 확립 등을 필요로 함에 따라 송전비용 산정방법에 관한 정확하고 공정성을 확보한 기준정립이 필요하다. 게임이론의해 중에서 비용배분방법으로 주목받고 있는 샤플리밸류와 중핵을 송전비용 산정방법으로 제시하고, 전력산업의 특성을 고려하여 계통을 두 가지 사례로 나누어 사례 연구하여 보았다.