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다양한 집진필터의 적용에 따른 열회수형 환기장치의 성능 변화에 대한 연구
강영모(Young Mo Kang),김종원(Jong Won Kim),서정섭(Jung Sub Seo),전병헌(Byung Hun Jeon),안영철(Young Chull Ahn) 대한설비공학회 2020 설비공학 논문집 Vol.32 No.4
Today, we live in a world where serious environmental problems exist such as ultrafine dust. Ultrafine dust ha many health risks and can cause various diseases and allergies. Thus, the role of the ventilation system as an air cleaning technology is becoming crucial. In this study, the performance evaluations of the total heat exchanger using several types of HEPA grade filters were conducted for total heat exchange efficiency, valid total heat exchange efficiency, leakage rate, noise, energy coefficient, and particle capturing efficiency. The H13 grade filter shows the highest total heat exchange efficiency. Also, the H13 grade shows the greatest decrease in total heat exchange efficiency considering the leakage rate. The results of the particle cleaning capacity test shows that the H12 grade filter has the best particle cleaning efficiency.
원자력발전소 철근콘크리트 공종의 작업조 생산성 및 영향요인 분석
허영기(Huh, Young-Ki),손창백(Son, Chang-Baek),임진호(Lim, Jin-Ho),안영철(Ahn, Young-Chull),오재훈(Oh, Jae-Hun) 대한건축학회 2014 大韓建築學會論文集 : 構造系 Vol.30 No.12
Few studies on crew productivity has been conducted, although the data is significant for time and cost estimation. Crew productivity data was collected for over 9 months from a nuclear power plant and analysed in order to identify factors driving the productivity. It was revealed that the crew productivity of form work and rebar work was 45.64(㎡/crew·day), 2.93(t/crew·day) on average respectively. The study also found that ‘nightwork’ and ‘total work amount completed’ were identified as drivers for the both works. Moreover, ‘complexity of daywork’ can lead to crew productivity deduction of about 77% for form-work and 81% for rebar-work. The productivity data collected and factors affecting the productivity will help managers to plan and control their similar works. This study will also be beneficial for those performing related studies.
정현재,정군식,안영철,Jeong. Hyeon-Jae,Jeong. Gun-Sik,Ahn. Young-Chull 한국방재학회 2010 한국방재학회논문집 Vol.10 No.6
대학 기숙사는 고시원과 유사한 재난취약성을 가진 시설로서, 특히 일정시간 출입문이 폐쇄된다는 점은 화재 등 재난의 발생 시 많은 인명피해를 초래할 수 있는 위험성을 내포하고 있어, 시급한 제도적, 계획적 대책마련이 요구된다. 본 연구는 대학기숙사의 피난 안전성 향상에 유효한 피난계획 기법의 형태학적 기준 제시를 목적으로, 대학 기숙사를 대상으로 방재적 특징을 고찰하고, 평면 형태별 피난 안전성 평가를 네트워크 해석법을 통하여 실시하였다. 결과에 대한 고찰을 통하여 대학 기숙사의 방재적 취약성을 명확히 하였고, 양방향 피난의 유효성을 정량적으로 확인 할 수 있었으며, 본 연구의 모델에 한해서 피난 안전성향상에 가장 효과적인 평면계획의 형태는 회로형임을 확인 하였다. 본 연구의 성과는 피난 안전성 향상에 유효한 피난계획 기법의 형태학적 기준마련을 위한 기초자료로써의 활용이 기대된다. University dormitory has some weaknesses against disaster such as fire because of high population density and strict control of access in night time. The purpose of this study is suggestion of a guide of effective floor plan for improvement of evacuation safety. Plans for preventing disasters are studied and evacuation safeties are analysed using network model analysis method according to plan types. The weakness of disaster prevention is quantified, and effectiveness of bidirectional evacuation is confirmed. The circuit type floor plan shows best evacuation characteristics and this result is anticipated to be adopted to design process of new dormitories and will contribute to improvement of evacuation safety.
정현재(Jeong Hyoun-Jea),안영철(Ahn Young-chull) 한국건축친환경설비학회 2010 한국건축친환경설비학회 학술발표대회 논문집 Vol.2010 No.10
University dormitory has some weaknesses against disaster such as fire because of high population density and strict control of access in night time. The purpose of this study is suggestion of a guide of effective floor plan for improvement of evacuation safety. Plans for preventing disasters are studied and evacuation safeties are analysed using network model analysis method according to plan types. The weakness of disaster prevention is quantified, and effectiveness of bidirectional evacuation is confirmed. The circuit type floor plan shows best evacuation characteristics and this result is anticipated to be adopted to design process of new dormitories and will contribute to improvement of evacuation safety.
가정용 고분자 전해질 연료전지 열병합 발전시스템의 급탕 적용을 위한 온수 저장조의 최적 설계에 관한 실험적 연구
황유진(Yujin Hwang),안영철(Young-Chull Ahn),정성일(Seong-ir Cheong),진근호(Keun-ho Jin),이재근(Jae-keun Lee) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.6
There are many attempts to use a fuel cell system as a residential power generation system. The purpose of this study is to investigate the optimal design of a water tank for a hot water system when the fuel cell co-generation system is combined with a domestic hot water supply system. The demands of hot water supply per month per home are investigated in Busan for a year. It showed somewhat large differences between the actual demand and the designed demand of hot water, but the actual capacity of hourly averaged hot water demands is analyzed as 60 ℓ/h in this study based on the actual demand. The experiments are performed in the various inlet and outlet locations of nozzles, and the hot water consumption rates. The experimental results are showed that the optimal capacity of the water tank is 200 f when the thermal efficiency, the storing capacity of hot water and the space for installation are considered.
박성출(Park, Sung-Chul),안영철(Ahn, Young-Chull),이경희(Lee, Kyung-Hee) 한국건축친환경설비학회 2012 한국건축친환경설비학회 논문집 Vol.6 No.2
TAB(Testing, Adjusting, and Balancing) processes are very common in building construction for matching the designed conditions and the actual conditions of mechanical systems. The TAB process can verify the performance of mechanical system and make a building efficiently in energy consumption. TAB processes are used in private sector usually due to the demand of owner for increasing the value of the building. However in public sector, such as a government office building and a public office building, TAB processes are seldom performed. Therefore the main reasons of low adoption of TAB process are investigated by questionnaire collected from professional engineers and public officers. Also possible ways to promote the TAB process especially in public sectors are investigated and suggested. The most important factor to promote the TAB process is the concern and the responsibility of a public officer who is in charge of the building construction project. And also it should be regulated regally by government.