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전자계-구조 연계해석에 의한 폐쇄배전반의 구조안전성 평가
윤진철(Jin-Chul Yun),홍윤석(Yun-Seok Hong),김진태(Jin-Tae Kim),김준연(Joon-Yeon Kim) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
An electric switchboard is a component of electricity supply system which divides the main current into smaller currents for distribution. Protective circuit breaker for abnormally excessive current is also an important role of switchboard. Metal clad switchgear is one kind of switchboard which is safe, ecofriendly and easy to achieve high voltage application. When the excessive electric current flows in conducting parts of the metal clad switchgear, large electromagnetic force would be generated and structural damage can occur to the main components. In this study, design safety of HHI metal clad switchgear is confirmed by numerical analysis method. By electromagnetic-structure coupled analysis, electromagnetic force generated in the metal components and mechanical stress due to the force are calculated consecutively. For the structural integrity evaluation, dynamic effect of the electromagnetic force is considered by applying modal analysis. From the analyses results, structural integrity of HHI metal clad switchgear is confirmed.
윤진철(Jin-Chul Yun),주정명(Jungmyoung Ju),황종현(Jong-Hyun Hwang),이수목(Soo-Mok Lee) 한국에너지학회 2014 한국에너지공학회 학술발표회 Vol.2014 No.4
CO₂ 배출 규제와 에너지 소비 절감의 요구가 늘어남에 따라, 버려지는 열을 수확하여 전기를 생산하기 위한 열전발전 연구가 최근 활발히 이루어지고 있다. 본 연구는 폐열 에너지회수장치로 사용하기 위한 열전모듈의 발전 특성을 분석하기 위해 수행되었다. Bismuth telluride로 제작된 열전모듈에 다양한 온도 조건을 부여하며 이에 따른 열전 거동을 분석하였다. 또한 다양한 온도 조건에서의 열전모듈의 발전 효율을 실험 및 이론에 의해 분석하였다. 이로부터, 열전모듈로 열에너지를 보다 효율적으로 회수하기 위한 방안을 제시하였다. Recently, due to limitation of CO₂ gas emission and increase of demand to reduce energy consumption, lots of researches are conducted to harvest wasted heat energy with thermoelectric module to produce electricity by Seebeck effect. This study was conducted to analyze characteristics of thermoelectric module to apply for heat energy harvesting device. Thermoelectric module composed of bismuth telluride was tested with various temperature conditions to analyze thermoelectric behavior of the module. Power geneation efficiency of the thermoelectric module for various temperature condition was analysed with both experimental and theoretical methods. From the results, method to harvest wasted heat energy with thermoelectric module more efficiently was proposed.
홍윤석(Yun-Seok Hong),윤진철(Jin-Chul Yun),권태훈(Tae-Hoon Kwon),서연호(Yeon-Ho Seo),배재득(Jae-Deok Bae) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Fluid catalytic cracking (FCC) is one of the most important conversion process used in petroleum refineries. It is widely used to convert the high-boiling and high-molecular weight hydrocarbon fractions of petroleum crude oils to more valuable oil products. The purpose of this study is to verify the structural integrity of integrated system including reactor, regenerator and catalyst standpipes which are the core facilities of FCC. The fundamental process design of FCC is provided by licensor and the details of reactor and regenerator are designed by using an in-house program based on the ASME Sec.Ⅷ, Div.1. To get more conservative results, a variety of load conditions such as dead weight, pressure, thermal expansion, seismic and wind loads are applied in the structural strength assessment. The structural piping analysis considering the latest design specification of the specific vendor items like expansion joint, slide valve and spring hanger is performed and its result is provided to the related vendors to confirm their performance once more. From the comprehensive analysis results, it is concluded that the analyzed system is designed to have sufficient flexibility to prevent pipe movements from the elastic failure due to the overstress of the pipe components or anchors. The analysis results meet the requirement of all applicable design codes and licensor’s specification.