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김진구 ( Jin-gu Kim ),박석호 ( Seok-ho Park ),이태석 ( Tae-seok Lee ),이재한 ( Jae-han Lee ),이충근 ( Choung Keun Lee ) 한국농업기계학회 2021 한국농업기계학회 학술발표논문집 Vol.26 No.2
본 연구는 농업시설 환기에 사용되는 환기팬의 날개 형상별 공기유동성능 차이를 알아보기 위하여 실시되었다. 동일한 환풍기에 형상이 각각 다른 날개를 설치하여 입력 주파수를 변화시키며 소비전류, 소비전력, 역률, 풍량 및 풍속분포, 소음 등을 측정하였다. 시험에는 날개 지름이 50cm로 동일하고, 날개 단면 형상에 차이가 있으며, 날개 엽수가 각각 3개, 4개 6개인 3종류의 날개를 사용하였다. 날개 구동을 위하여 3상 4극 유도전동기로 구동되고 벨마우스 타입의 덕트가 설치된 환풍기를 선정하여 날개를 교체하며 전력특성과 공기유동성능 등을 조사하였다. 전원 입력측에 슬라이닥스와 주파수변환기를 설치하여 전압과 주파수를 조절하였고 전력계와 전류계를 설치하여 역률을 계산하였다. 공기유동성능을 알아보기 위하여 환풍기 공기 유입 측에 풍량계를 설치하고 공기 배출 측에 풍속계를 설치하여 날개 형상별 공기 유량과 풍속 분포를 조사하였다. 시험 결과 6엽 날개 기준 전원 주파수를 30Hz에서 60Hz로 변화시키는 동안 날개의 분당 회전수는 920회에서 1754회로 91% 증가되었고, 풍량은 2420m3/h에서 4730m3/h 로 95% 증가되었으며, 소비전력은 122W에서 512W로 420% 증가되었다. 날개 엽수별 소비전력은 3엽, 4엽, 6엽 각각 정격 220V, 60Hz 전원 인가 시 590W, 390W, 512W가 소비되었는데 이는 서로 다르게 설계된 날개 단면 형상에 따른 공기저항에 따라 모터에 가해지는 부하량이 다르기 때문이다. 날개 엽수별 풍량은 3엽, 4엽, 6엽 각각 5710m3/h, 5070m3/h, 4730m3/h로 나타나 소비전력 대비 공기 유동량 비율은 각각 9.7, 13.0, 9.2 (m3·h-1/W) 로 나타났다.
한일우 ( Il-woo Han ) 한국산업디자이너협회 2010 산업디자인학연구 Vol.4 No.1
The time has come that have to be a basic of our economy, by making venture and a healty small and medium enterprises activity which have small capital organization of the past. Above all, it is required activity of design development that can show the biggest effect using the least coast. that has to get support of all-round help of country, political improvement and administration, or a system. In accordance with, study actively participate in new design development of the small and medium enterpries that is making a ventilationfan; and it take a design concept according to the product analysis of competition enterprises, market surveying and circumference environment surveying, grasping a problem of existing products and making a alternative plan; and we make 2kind of mock-up of this product through essential oppion and discussion with product company, taking a actual process as a idea sketch and rendering and that contribute to increase in sales of small and medium enterprise product through actual merchandize of product, at the same time we must guide participation of active design development, stimulating theirs will about design development of small and medium enterprises. At this time, in korea many small and medium enterprises hesitage about design development because of deficit of information and interests about the design, of financial reasons, and it need to more support leading goverment to political design development about small and medium enterprises that have no investment ability.
장식기능이 강화된 환풍기의 다양한 배치에 따른 실내 환풍 성능 비교
정남균 한국기계기술학회 2024 한국기계기술학회지 Vol.26 No.3
Wall-embedded ventilators, which are commonly used for ventilation of buildings, greatly damage the aesthetics of the building due to pollutants such as dust and grease sticking to the fan and gaps of the ventilator as the period of use increases. For this aesthetic reason, it is often installed in a place that is not easily visible to people, and if the ventilation fan is not properly arranged and installed, it is difficult to maintain indoor air in an optimal state. In this study, the effect of the arrangement of ventilators on indoor ventilation performance was investigated. Comparisons were made between the case where three ventilators were concentrated and the case where they were spaced apart at regular intervals. It was found that the ventilation performance was different depending on the location where the ventilators were installed.
목예주,이원섭,최우석 한국기계기술학회 2021 한국기계기술학회지 Vol.23 No.6
Recently, as interest in external environments such as fine dust has increased, the interior environment is also becoming important. The specifications for range hoods in the kitchen have been changed to improve ventilation of indoor air. Accordingly, the performance improvement through the structural design of the range hood was studied. Experiments were conducted on flow rates, pressure, temperature, and noise by A, B, and C-Type for performance analysis according to internal structure. For C-Type, the wind volume () was 223.69, 2nd stage 257.46, showing results of not less than 240 and not more than 280 within the ±1 m/s flow rate error range. Noise (dB) was an average value of 54.83 in the first stage and 60.65 in the second stage, showing results not more than 60 dB within the ±1 dB margin of error. This is the result of meeting KS C 9304:2020 Ventilation System Specification.