http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
태양광 패널이 적용된 농업용 저수지의 안정성 및 경제성 평가
손진수(Jin-Su Son),이진영(Jin-Young Lee) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.5
대한민국의 농업용 저수지는 대부분 축조된 지 50년 이상 되었다. 농업용 저수지는 예상치 못한 자연재해로 인해 붕괴되는 것을 막기위해 유지보수와 보강이 필요하다. 본 연구에서는 태양광 패널이 적용된 농업용 저수지 사면의 안정성과 경제성 평가를 수행하였다. 태양광 패널이 설치된 사면의 안정성은 Slope/w 프로그램을 사용하여 평가되었고 보강 방법과 태양광발전 시스템의 부하를 고려하였다. 또한 RETScreen 프로그램을 사용하여 태양광 발전 시스템의 경제성 분석을 수행하였다. 경제성 분석에는 태양광 모듈의 단위 비용, 태양광 패널의 수명, 그리고 대상 저수지의 기후 환경이 고려되었다. 결과적으로, 태양광 시스템과 보강 방법의 적용으로 저수지 사면의 안정성이 향상되었다. 게다가 전기 생산 및 온실 가스 감축과 같은 경제적 이점을 기대할 수 있음을 이론적으로 확인하였다. In Korea, the majority of agricultural reservoirs have been in use for over 50 years. Hence, there is an urgent need for maintenance and reinforcement to safeguard against potential collapses caused by unforeseen natural disasters. This study assessed the stability and economic viability of applying solar panels to these agricultural reservoir embankments. The Slope/w program was used to analyze the stability of embankments fitted with solar panels, considering reinforcement techniques and the load from the photovoltaic (PV) system. The economic feasibility of the PV system was determined using the RETScreen program, factoring in the unit cost of solar modules, lifespan of solar panels, and specific climatic conditions of the target reservoir. The findings indicate that the PV system and reinforcement techniques enhanced the stability of the reservoir embankments. Furthermore, economic benefits, such as production of electricity and reduction of greenhouse gas, can be expected.
경화 지연제 혼입 콘크리트의 부착전단강도 및 부식내구성 평가
손진수(Jin-Su Son),이진영(Jin-Young Lee) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.4
본 연구에서는 경화지연제를 혼입한 콘크리트의 부착전단강도 및 부식내구성을 평가하였다. 경화지연제 혼입 콘크리트의 성능을 평가하기 위해 경사전단시험, 직접전단시험, 가속화부식시험을 수행하였다. 시험의 변수로는 경화지연제 혼입율(0, 1%), 콘크리트 타설면 처리방법(무처리, 치핑, 브러싱), 상층부 콘크리트 지연 타설 시간(8, 16, 24 h)이 고려되었으며 가속화 부식 시험의 경우 콘크리트 피복 두께 변수(20, 30, 45 mm)가 추가로 고려되었다. 시험의 결과로 경화지연제를 혼입한 시험체의 부착전단강도가 일반 콘크리트 시험체에 비해 더 높게 나타났으며 지연 타설 시간이 증가함에 따라 부착전단강도가 감소하는경향이 나타났다. 또한 경화지연제의 혼입을 통해 철근콘크리트의 부식내구성 향상을 확인하였으며 이러한 결과를 통해 경화지연제의 혼입이 지연 타설로인해 발생할 수 있는 타설 경계면의 부착강도와 내구성 저하 문제를 해결할 수 있는 적절한방안이 될 수 있다고 판단된다. In this study, the bond shear strength and corrosion resistance of concrete with setting retarders were evaluated. For this, slant shear, bi-surface, and accelerated corrosion tests were conducted. The variables considered included the proportion of the setting retarder (0 and 1%), surface treatments of concrete (as-cast, chipping, and brushing), curing hours (8, 16, and 24 h), and concrete cover depths (20, 30, and 45 mm). Consequently, the bond shear strength of concrete with the retarder showed a higher value than that of normal concrete. Moreover, an increase in curing hours resulted in a higher value of the bond shear strength. Furthermore, the addition of a retarder in concrete increased corrosion resistance. Based on the test results, the addition of a setting retarder is believed to be a suitable solution to address the bond shear strength and durability issues that may arise at the interface of delayed concrete placement.
경화 지연제 혼입 콘크리트의 부착전단강도 및 부식내구성 평가
손진수 ( Jin-su Son ),이진영 ( Jin-young Lee ) 한국농공학회 2023 한국농공학회 학술대회초록집 Vol.2023 No.0
In this study, the bond shear strength and corrosion resistance of concrete with setting retarder were evaluated. To investigate the bond shear strength and corrosion resistance of concrete with setting retarder, slant shear tests, bi-surface tests, and accelerated corrosion tests were carried out. Variables considered included the proportion of setting retarder (0, 1%), surface treatments of concrete (as-cast, chipping, brushing), curing hours (8, 16, 24h), and concrete cover depths (20, 30, 45mm). As a result, the bond shear strength of concrete with retarder showed higher value compared to normal concrete. Moreover, an increase in curing hours resulted in a higher value of bond shear strength. Furthermore, the addition of a retarder in concrete demonstrated an increase in corrosion resistance. Based on the test results, it is deemed that the addition of a setting retarder can be a suitable solution to address the bond shear strength and durability issues that may arise at the interface of delayed concrete placement.
집중적 답압 피해에서의 잔디 회복을 위한 강제 흡.호기 순환식 설비의 효과
이정호,손진수,김인철,주영규,Lee, Jeong-Ho,Son, Jin-Su,Kim, In-Chul,Joo, Young-Kyoo 한국잔디학회 2007 한국잔디학회지 Vol.21 No.2
Korea and Japan hosted the FIFA World Cup Soccer Game in 2002. Ten stadiums had been built and more than 30 soccer grounds for practice were renovated in Korea. Sport fields in both countries had problems on cool-season turfgrass growth and quality by summer decline during humid and warm climate especially followed by intensive uses. We measured the effects of air-flow system, which is designed to optimize rootzone soil gas and moisture levels to promote the growth and maintenance turfgrass. This experiment was carried out to verify the effects of the system on soil gas exchange, ground resilience, and turfgrass recovery in turfgrass rootzone. Within 1 or 2hr of operation of the system, rootzone soil gas ($CO_2$, $O_2$) levels returned to natural atmospheric levels completely Soil $CO_2$ levels began to decrease within the first 10 min of operation of the system. The levels were reduced from 1.3 to 0.06% after 30 min, and natural atmospheric levels within 1 hr. When the system was turned off, $CO_2$ levels increased to 0.36% and 0.7% after 5 and 20 hr, respectively. The application of the system did not affect the resilience of turf surface after traffic treatments. Higher traffic treatment resulted in higher surface resilience especially in zoysiagrass plots. Operation of the system had a significant beneficial impact on turf recovery by increased root dry wight and improved turf quality, as compared with the non-operated check plots.