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Effect of Glass Fiber-Reinforced Connection on the Horizontal Shear Strength of CLT Walls
( Hongju Jung ),( Yojin Song ),( Soonil Hong ) 한국목재공학회 2020 목재공학 Vol.48 No.5
The connection performance between cross-laminated timber (CLT) walls and support has the greatest effect on the horizontal shear strength. In this study, the horizontal shear performance of CLT walls with reinforced connection systems was evaluated. The reinforcements of metal bracket connections in the CLT connection system was made by attaching glass fiber-based reinforcement to the connection zone of a CLT core lamina. Three types of glass fiber-based reinforcement were used: glass fiber sheet (GS), glass fiber cloth (GT) and fiber cloth plastic (GTS). The horizontal shear strength of the fabricated wall specimens was compared and evaluated through monotonic and cyclic tests. The test results showed that the resistance performance of the reinforced CLT walls to a horizontal load based on a monotonic test did not improve significantly. The residual and yield strengths under the cyclic loading test were 38 and 18% higher, respectively, while the ductility ratio was 38% higher than that of the unreinforced CLT wall. The glass fiber-based reinforcement of the CLT connection showed the possibility of improving the horizontal shear strength performance under a cyclic load, and presented the research direction for the application of real-scale CLT walls.
Development of A Power Conditioning System for A 100kW MCFC Generation System
Hongju Jung,Hyoungnam Kwon,Joonmo Chung,Inyoung Suh,HeeCheon Lim,KyoSang Ahn 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
This paper presents the development and testing of a power conditioning system (PCS) for application to a 100kW Molten Carbonate Fuel Cell (MCFC) generation system. The MCFC generation system is a part of a four year government funded research project that began in 2001. This paper presents the results of various tests and performance verification of the 100kW PCS using a DC power system that simulates the DC output of the MCFC fuel cell. Performance of the DC/DC, DC/AC converters were verified, and basic<br/> control functions such as grid connection, protection and characteristics of each component were tested. The tests were<br/> performed under light load and rated load conditions to verify the operation efficiency, power quality effects, and stability of the PCS.
정홍주(Jung HongJu),이정민(Lee JeongMin),정준모(Chung JoonMo),서인영(Suh InYoung) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
본 논문은 신 발전 방식들 중 하나인 용융탄산염형 연료전지 발전시스템의 국산화연구와 관련하여, 연료전지로부터 생성된 전력을 전력계통에 안정되게 변환, 주입하기 위한 계통연계형 전력변환기를 제작하고 단위기기별 성능 시험을 수행한 결과이다. 250㎾급 전력변환기의 구조 설계와 단위기기 설계는 250㎾급 용융탄산염형 연료전지 시스템의 정격 사양 및 스택의 운전 형태를 시뮬레이션 하여 진행되었으며, 크게 DC/DC 컨버터부와 DC/AC 인버터부의 회로로 구성된다.
정홍주(HongJu Jung),신현진(HyunJin Shin),여상민(SangMin Yeo),박정수(JungSoo Park),이정민(JeongMin Lee),서인영(InYoung Suh) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.11
다양한 신재생에너지의 발전원 확보를 위해서는 발전원의 출력 안정화가 필수적으로 수반되어져야 한다. 본 논문은 다양한 신재생에너지 발전원의 안정화를 위한 핵심기기 중 하나인 STATCOM의 설계 및 제작에 관한 내용이다. 개발 진행 중인 1MVA STATCOM은 제주도 행원 풍력발전의 전력품질을 개선하기 위해 설치될 예정으로 3-Level 인버터로 구성된 Stack과 LC 필터 그리고 변압기와 수배전반으로 구성되어 있다.