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Pilot 규모 석탄 가스화기에서의 탄종별 가스화성능 특성
박세익,이중원,서혜경 한국수소및신에너지학회 2010 한국수소 및 신에너지학회논문집 Vol.21 No.5
The IGCC (Integrated gasification combined cycle) is known for one of the highest efficiency and the lowest emitting coal fueled power generating technologies. As the core technology of this system is the gasifier to make the efficiency and the continuous operation time increase, the research about different coal's gasification has been conducted. Our research group had set-up the coal gasifier for the pilot test to study the effect of different coals-Shenhua and Adaro coal- on gasification characteristics. Gasification conditions like temperature and pressure were controlled at a fixed condition and coal feed rate was also controlled 30 kg/h to retain the constant experimental condition. Through this study we found effects of coal composition and O2/coal ratio on the cold gas efficiency, carbon conversion rate. The compounds of coal like carbon and ash make the performance of gasifier change. And carbon conversion rate was decreased with reduced O2/coal ratio7). The optimal O2/coal ratio is 0.8 for the highest cold gas efficiency approximately. At those operating conditions, the higher coal has the C/H ratio, the lower syn-gas has the H2/CO ratio.
박세익,양영철 한국스포츠학회 2015 한국스포츠학회지 Vol.13 No.3
This study aims to understand the effect of participants' motives and continuation for yacht sports. To accomplish the goal. survey method has been carried out from 410 yacht club members in Busan and Gyeongnam. The tool for survey is questionnaire and correlation Analysis and regression analysis are conducted. The conclusion form the analysis are as follows. First, the effect of participation motive on commitment showed meaningful differences in recognition commitment, conduct commitment. External display, skill development, Enjoyment and achievement give positive effect while amotivation gives negative effect. Second, the effect of participation motive on continuation showed meaningful difference in tendency, potentiality, reinforcement. In tendency, enjoyment, skill development, display, health and fitness have positive effect and amotivation have negative effect. In potentiality, display, health and fitness, skill development have positive effect and amotivation have negative effect. In addition to these, in reinforcement, health and fitness, enjoyment, accomplishment and display have positive affect. Third, the effect of participants' immersion experience on continuance showed meaningful difference in tendency, potentiality and reinforcement. Positive effect was shown among sub factors of exercise continuance.
박세익,김현수,박희정,임수정,김현준,이상현 한국산림과학회 2018 Forest Science And Technology Vol.14 No.2
This study was carried out to investigate the potential of timber production in private forest that is typically small in size, and to schedule timber yield for sustainable forest management. The study target areas were 1424 ha of Jinan-gun pioneer forest management sites in Jeollabuk-do, Korea. To schedule the timber yield, analysis and statistical processing were conducted based on materials obtained from the Forest Resources Inventory Center of the National Forestry Cooperatives Federation. The timber yield schedule, which induced legal forest state using the concept of maturity based on resource analysis, showed that total maturity level of Quercus species was 2108.5. The total maturity level of Pinus densiflora at that time was 1335.4, which was higher than 1316, the total maturity level under legal state. By suggesting solutions of systematic management through private forest management scaling, for private forest promotion equivalent to 68.1% of Korean forest, the economic feasibility on timber yield simulation was developed. In the economic analysis, the net present value (NPV) of Quercus species was 1410 billion KRW. The benefit–cost ratio (BCR) was 2.0 and Pinus densiflora was 3150 billion KRW in NPV and had a BCR of 4.0, showing economic feasibility.
사회취약계층의 숲체험교육 질적향상 방안을 위한 중요도-만족도 분석
박세익,고병준,박희정,최용락,이상현 한국환경과학회 2023 한국환경과학회지 Vol.32 No.3
This study aimed to improve the level of satisfaction and service quality of a forest experience education program for vulnerable social groups by administering a survey problems of the program and suggested improvements. 428 participants in the program. Reliability analysis of the survey yielded values of, Cronbach’s α value was higher than 0.8 for all items, indicating very high reliability. Importance-performance analysis (IPA), a method of measuring and comparing the degree of satisfaction, found two factors: “first need for correction” which included “diversity of programs” and “professionalism of programs”; and “the need for sustained effort” which included “benefits of programs”, “the role of program instructors” and “the interest of programs”. Previously, forest experience education focused on programs involving base expansion and promotion, or quantitative expansion education. Therefore, this study is meaningful in providing basic data on forest experience education for vulnerable social groups.
합성천연가스의 수소함량 변화에 따른 가스터빈 연소특성 평가
박세익,김의식,정재화,홍진표,김성철,차동진 한국수소및신에너지학회 2012 한국수소 및 신에너지학회논문집 Vol.23 No.4
Increasing demand for natural gas and higher natural gas prices in the recent decades have led many people to pursue unconventional methods of natural gas production. POSCO-Gwangyang synthetic natural gas (SNG) project was launched in 2010. As the market price of natural gas goes up, the increase of its price gets more sensitive due to the high cost of transportation and liquefaction. This project can make the SNG economically viable. In parallel with this project, KEPCO (Korea Electric Power Corporation) joined in launching the SNG Quality Standard Bureau along with KOGAS (Korea Gas Corporation), POSCO and so on. KEPCO Research Institute is in charge of SNG fueled gas turbine combustion test. In this research, several combustion tests were conducted to find out the effect of hydrogen contents in SNG on gas turbine combustion. The hydrogen in synthetic natural gas did not affect on gas turbine combustion characteristics which are turbine inlet temperature including pattern factor and emission performance. However, flame stable region in Φ-Air flow rate map was shifted to the lean condition due to autocatalytic effect of hydrogen.
수영장의 서비스스케이프가 고객의 내적반응 및 재방문의도에 미치는 영향
박세익,김철주 한국스포츠학회 2015 한국스포츠학회지 Vol.13 No.1
The purpose of this study is examining the effect of servicescape of swimming pool on customer's internal response and revisit intention. The research subject are the 340 swimmer in 2015. The data analyses were performed via frequency analysis, exploratory factor analysis, correlation analysis, multiple regression analysis using SPSS 21.0 statistical package. Based on the study results, this study attempted to present the following suggestions. First, perimetric factor and social factor which are subfactor in servicescape of swimming pool have effect affective response. Second, perimetric factor, design factor and social factor which are subfactor in servicescape of swimming pool have effect cognitive response. Third, perimetric factor and social factor which are subfactor in servicescape of swimming pool have effect revisit intention. Forth, affective response and cognitive response which is subfactor in customer's internal response of swimming pool have effect revisit intention.