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신축 건물의 포름알데히드 노출에 의한 농도평가 및 재실자의 인식도조사
김동건 ( Dong Keon Kim ),이혜민 ( Hye Min Lee ),박제언 ( Jee On Park ),김민주 ( Min Joo Kim ),이선영 ( Sun Young Lee ),홍가연 ( Ga Yeon Hong ),우병렬 ( Byung Lyul Woo ),양원호 ( Won Ho Yang ) 대구가톨릭대학교 자연과학연구소 2011 자연과학연구논문집 Vol.9 No.1
This study progressed to survey formaldehyde (HCHO) concentration at using passive sample for 5 days and active sampler for 1 hr in new building. We selected places such as department office, lecture room, professor`s room, studio room, and hallway. The highest average concentration of HCHO was 544.13 ㎍/m3 at active sampler in studio room. Whereas lowest average concentration of formaldehyde was 4.91 ㎍/m3 at active sampler in hall way. Specially HCHO concentration of the studio room was more than 8 times on the indoor air quality standard, and concentration of the remaining places are above the standard. These results can be explained that indoor air quality of new building should be improved by installing the air cleaning device and ventilation system.
김동건 ( Dong Keon Kim ),김명수 ( Myeong Su Kim ),김순신 ( Sun Shin Kim ),홍가연 ( Ga Yeon Hong ),이석용 ( Seok Yong Lee ),양원호 ( Won Ho Yang ) 대구가톨릭대학교 자연과학연구소 2012 자연과학연구논문집 Vol.10 No.1
This study progressed to survey formaldehyde(HCHO) concentration at using passive sample and active sampler in New building. We selected places such as department office, lecture room, professor`s room, studio room, and hallway. The highest average concentration of formaldehyde was 544.13 ug/m3 at active sampler in studio room. Whereas lowest average concentration of formaldehyde was 4.91 ug/m3 at active sampler in hall way. Specially the fact of the studio room was more than 8 times on the baseline, concentration of the remaining places are above the baseline. According to analysis new building which was built should need to improvement in indoor air quality.
김동건(Dong-Keon Kim),권순홍(Soon-Hong Kwon),정성원(Sung-Won Chung),박종민(Jong-Min Park),최원식(Won-Sik Choi),김종순(Jong-Soon Kim),권순구(Soon-Goo Kwon) 한국기계가공학회 2011 한국기계가공학회지 Vol.10 No.6
The flow characteristics of unventilated dual impinging jets were experimentally investigated. Two nozzles with an aspect ratio of 20 were separated by 6 nozzle widths. The Reynolds number based on nozzle width and nozzle exit velocity was set to 5,000. A Particle Image Velocimetry (PIV) was used to measure turbulent velocity components. It was found that, when an impingement plate was installed in the converging region, there was a stagnation region in the inner area between nozzles. However, when it was installed in the combined region, both jets were merged and collided into the plate, showing single-jet characteristics. In addition, at a dual impinging jet, as the distance between a nozzle and an impingement plate decreased, the spanwise turbulent intensity at the plate increased.