생물학적 위험등급 3등급 BL3용 공조기의 급배기는 밀폐 연구시설 사이의 교차오염을 막기 위하여 관계 규정에 의거 전외기 방식을 택하고 있다. 이와 같은 전외기 방식의 공조기는 에너지 소비가 많으며 게다가 BL3의 경우 하루 24시간 운전으로 인하여 에너지 소비가 매우 많으며 또한 연구시설의 대형화로 인하여 에너지 소비는 더욱 증가하게 될 것이다. BL3용 공조기에서의 에너지 절약에 관한 연구로는 국외의 경우 전외기 방식에서 급기와 배기덕트 사이에 부동액 등을 사용한 핀-튜브 열교환기를 사용하여 배기로부터 열회수를 통한 에너지 절약에 관한 연구를, 국내의 경우 생물학적 안전성을 기반으로 하는 재순환에 의한 에너지 절약에 관한 연구를 시도하고 있다. 본 연구에서는 기존의 BL3용 공조기에서 주로 사용하는 핀-튜브 열교환기와 마이크로 채널 열교환기에 대한 특성을 비교, 연구하였고 마이크로 채널 제작을 위한 열교환기 설계 프로그램을 개발하였다.

A study of temperature profiles in mixing zone of AHU(air handling unit) can contribute greatly to enhance performance of AHU system, so the study on the temperature distribution between RA(return air) and OA(outdoor air) is important to analyze the mixing characteristics in a mixing zone of AHU. Accordingly, the temperature profiles during RA(return air) and OA(outdoor air) supply process into mixing zone of AHU with an air mixer are studied numerically. The effect of air mixer, OA temperature and RA/OA flow rate are studied in detail. In this study, the results show that the mixing effect is all high for installed the air mixer. The more OA flow rate decrease, the more mixing effect is high.

Recently, the air quality issue came to the fore to the occupants of indoor areas with the detection of a large amount of indoor air pollutants such as formaldehyde that causes headache and atopic dermatitis. In order to address this issue, the use of indoor air purifying plants is considered positively as an ecological improvement option. However, the objective performance verification on indoor air-conditioning air volume has not been sufficient. This study aims to verify possible linkage with a building’s air conditioning equipment in order to optimize indoor air-conditioning effects by vegetation bio-filters. To this end, 4 different types of air filter material and AHU (Air Handling Unit) system were linked under air conditions of total wind volume of 400, 600, 800, 1,000 CMH and pressure loss by material was monitored objectively. Finally, material-specific power consumption for system operation was calculated to review energy efficiency. As for pressure loss by material, in terms of total wind volume of 800±1.8 CMH, Pre filter was lowest at –11.69 mmAq and LMF-based vegetation mat was highest at –219.94 mmAq. Based on this, as for material-specific power consumption, the Pre filter, which has the lowest pressure loss, was expected to have power consumption 94.7% lower than the LMF-based vegetation mat.

People today spend 80% of their time indoors and have been showing keen interests in air quality since 2015 due to harmful chemical issues such as humidifier disinfectants. Although plant-based air purification method is widely known to the public, its objective performance and air-conditioning efficiency have been limited. In particular, in the case of publicly used places frequented by many and unspecified persons, high air-conditioning wind volume is required and it is difficult to secure the required total wind volume with the current air purification method using plants. Therefore, in order to secure air-conditioning wind volume when linked with plants, this study aims to verify stability in using vegetation units that can be linked with building air-conditioning equipment. To this end, vegetation units and AHU were linked for 40 hours under no irrigation conditions and ecological environmental changes were monitored objectively. Pressure loss by total wind volume of vegetation units was verified, and soil moisture, Chlorophyll, and FVC were monitored. First, soil moisture was converged to 0% at a spot where wind volume is concentrated in vegetation units. In both of two types of tree species, chlorophyll showed a change of 1.2 - 2.9 SPAD and FVC showed a change of 4-29% after the experiment.