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Jeong Euy Park,Tae Hong Hwang,Jin A Chu,Seon Woo Kim,Yoon Ho Choi,Sang Hoon Lee,Jung Don Seo,Won Ro Lee,Won Ha Lee 대한내과학회 2000 The Korean Journal of Internal Medicine Vol.15 No.1
Objectives: The aging process affects responsiveness and other functions of endothelium and vascular smooth muscle cells, predisposing the old vessels to the development of atherosclerotic lesions. Endothelial nitric oxide synthase (ecNOS) gene polymorphis
活性炭에 의한 크롬(Cr^(+6)) ion의 吸着〔I〕
조철형,신성의,최형일 조선대학교 생산기술연구소 1983 生産技術硏究 Vol.1983 No.-
The use of domestic activated carbon for removal of the heavy metal was studied by the adsorption characteristics of chromium ion on domestic activated carbon, the adsorption of chromium ion on activated carbon from the effect of pH, velocity of adsorption, isothermal adsorption and removal of chromium ion has been studied. The adsorption characteristic of absorbent used was followed by Freundlich's adsorption isotherm theory, Freundlich constant k, 1/n was 4.5, 0.63 respectively, The adsorption velocity of chromium increased untill zero to 2hr., but after that it was almost come to the equilibrium in an hour. The result showed that removal efficiency of pollution matters was about 70 percent.
Tae Hong Hwang,Jin A Chu,Yoon Ho Choi,Sang Hoon Lee,Jung Don Seo,Won Ro Lee,Won Ha Lee,Jeong Euy Park,Seon Woo Kim 대한내과학회 2000 The Korean Journal of Internal Medicine Vol.15 No.1
Objectives: The aging process affects responsiveness and other functions of endothelium and vascular smooth muscle cells, predisposing the old vessels to the development of atherosclerotic lesions. Endothelial nitric oxide synthase (ecNOS) gene polymorphis
A STUDY ON THE EXPLOSION SAFETY ASSESSMENT OF HYDROCARBON REFRIGERANT REFRIGERATOR
Oh,Kyu-Hyung,Kim,Min-Kyu,Chu,Euy-Sung,Lim,Byung-Han,Kim,Man-Hoe,Park,Yoon-Ser 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-
This paper discribes an experimental explosion risk assessment study on refrigerators containing flammable hydrocarbon refrigerant. A refrigerator used in this study is a larder fridge type, 215 liter in volume. The hydrocarbon refrigerant used in the refrigerator is iso-butane(C<TEX>$_4$</TEX>H<TEX>$_{10}$</TEX>). For the explosion safety assessment of the refrigerator, temperature of compressor, cooling air circulation fan motor, defrost heater and inner lamp were measured during the operation. And to confirm the ignitablity of flammable gas by the electric spark of the switches of the refrigerator, ON-OFF test of all switches were conducted with compulsorily near the stoichiometric concentration atmosphere of iso-butane-air mixture. As the result of experiment above mentioned and another experiment for the explosion safety assessment, we can conclude that explosion hazard in connection with the use of hydrocarbon refrigerant was few.w.
향 연기 누적에 따른 HEPA 필터 성능 변화의 실험적 연구
이종범(Jong Beom Lee),김무중(Moo joong Kim),김관택(Gwan Taek Kim),임병한(Byung Han Lim),주의성(Euy Sung Chu),김권진(Kwon Jin Kim),윤백(Baek Youn) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
It is known that the ultra-fine dust is fatal to human health, and HEPA filter is one of the efficient ways to remove it at home, office and etc. The present work studied the variation of HEPA filter performance(pressure drop, dust collection efficiency and etc.) as ultra-fine dust under 0.3μ was accumulated on the filter and the characteristic difference from the results of the regular test dust whose diameter ranges from 0 to 100μ. Incense smoke was used to generate the ultra-fine dust for the test. Generally it is known that as the regular test dust is accumulated on a filter pressure drop increases and dust collection efficiency of the filter remains constant or increases. However It was fount that the accumulation of ultra-fine dust on HEPA filter resulted in a considerable reduction in the dust collection efficiency while the pressure drop remains almost constant, which is quite different from the results of regular test dust.
Economizer cycle을 채용한 전열교환형 환기시스템의 에너지 절감 효과 분석 : 국내 학교를 대상으로
김주욱(Joo Wook Kim),박재형(Jae Hyung Park),송두삼(Doo Sam Song),주의성(Euy Sung Chu),권영철(Young Chul Kwon) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Maintaining an IAQ with fresh in school building is very important because the good IAQ can be possible to improve the academic performance. Since school buildings are very dense and require a lot of fresh air, the need for ERV(Energy Recovery Ventilator) has become obvious. While opening a window does provide ventilation, the building's heat and humidity will then be lost in the winter and gained in the summer, both of which are undesirable for the indoor climate and for energy efficiency. ERV technology offers an optimal solution: fresh air, better climate control and energy efficiency. However, when the outdoor air condition is favorable to control the indoor environment such as spring and autum in Korea, heat exchange in ERV would rather increase the cooling load than diminish. Economizer cycle control which using the outdoor air in controlling the indoor thermal environment has many benefit in terms of energy saving and IAQ control. In this study, the ERV with economizer cycle control will be suggested. And then the system control characteristics and energy saving effect will be analyzed through the TRSNSYS Simulation.
남현규(Hyun-Kyu Nam),배철호(Cheol-Ho Bai),권영철(Yong-Chul Kwon),김성우(Sung-Wool Kim),주의성(Euy-Sung Chu) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
An experimental study was performed to reduce the condensation during the winter operation. The hydrochromic ink was used to detect the condensation in the total heat exchanger. The condensation within the total heat exchanger during the winter operation occurs at the cold wall of the exhaust air. When the air flow rate of the exhaust air is decreased, the condensation temperature of the exhaust air becomes lower and therefore, the condensation is reduced. While the decreasing air flow rate of the supplied air promotes the condensation by raising the condensation temperature of the exhaust air within the total heat exchanger.