• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.1781-1782
• /
• 2007

건축물의 냉방 난방 제어를 위해서 열쾌적성과 에너지 절감에 기술이 집중되어서 발생하는 실내공기 오염에 대해서 실내 냉방 난방 부하와 $CO_2$ 농도에 따라서 환기량을 조절하는 "온도 습도 $CO_2$ 검출 및 제어용 멀티캐스트 컨트롤러"(이하 "컨트롤러")를 개발하였다. 컨트롤러의 어플리케이션은 뉴런C로 프로그램 하였으며 자동제어 네트워크의 환경에 따라서 전용선, 전력선 및 무선 통신 방식을 적용할 수 있도록 모듈형태로 제작하여서 현장 적용성을 높였다. 연구 결과 온도, 습도 및 $CO_2$를 분석하여 환기량을 조절하여 낭비 에너지를 줄였고 실내 공기의 오염을 예방하게 되었고 멀티캐스트 방식으로 자동제어 네트워크의 통신트래픽이 감소되고 효율성을 높였다.

• Proceedings of the Korean Environmental Health Society Conference
• /
• 2005.11a
• /
• pp.94-97
• /
• 2005

서울, 인천, 광주, 그리고 부산지역의 대형업무용 빌딩 소재 36개 사무실을 대상으로 사무직 근로자의 실내환경에 대한 인식, 신체증상경험, 사무실환경관련 태도를 알기위한 설문조사와 그리고 실내환경에 영향을 미치는 인자에 대한 실태조사결과 자신이 근무하고 있는 사무실 환경에 대해 만족하지 못한 근로자들이 많았으며, 신체이상 증상 경험유무에 있어서도 빌딩증후군 관련 증상을 경험한 사람이 많은 것으로 조사되었다. 실내환경질에 영향을 미치는 요인에 대한 평가에 있어서도 겨울철 경우 실내의 상대습도가 매우 낮아 불편감을 초래하고 있는 것으로 조사되었고, 실내공기 오염의 지표물질인 이산화탄소 농도에 있어서도 최고치 농도가 1,000ppm을 초과하는 사무실이 33.3%인 12개 사무실로 나타나 실내환기에 있어 문제가 있는 것으로 조사되었다. 대부분의 실내공조설비는 주로 온도조절 즉 냉${\cdot}$난방 조절목적으로 주로 이용하고 있는 것으로 나타나 신선외기공급을 통한 실내환기 개념에 있어서는 인식이 낮은 것으로 평가 되었다.

• Journal of the Korean Society of Radiology
• /
• v.14 no.7
• /
• pp.881-889
• /
• 2020

The objective of this study was to quantitatively measure the changes in radon concentration due to ventilation and air purification plants in the lower and upper floors of a building. This study measured and compared radon concentration in the lower and upper floors of the building by using a radon meter when the room was closed, it was ventilated, and air purification plants were installed at a specific time. One-way ANOVA was conducted to evaluate the effect of treatment (i.e., closure, ventilation, and air purification plants) on radon concentration. The results of this study showed that ventilation and air purification plants significantly decreased radon concentration in the lower and upper floors of the building, but the effect of ventilation and that of air purification plants were not significantly different. Therefore, it will be possible to reduce radon concentration effectively when ventilation and air purification plants are used appropriately.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
• /
• v.24 no.1
• /
• pp.1-13
• /
• 1995

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
• /
• v.33 no.6
• /
• pp.24-31
• /
• 2004

국내의 경우, 2004년 5월부터 시행예정인 다중이용시설 등의 실내공기질관리법에 따라서, 학교 등의 일부 건축물을 제외하고 신축공동주택 및 대부분의 거주용 공간에 대한 실내공기질관리법이 제정되었다. 이러한, 건축물 내에는 다양한 오염원(sources)과 휘발성유기화합물(VOCs), 포름알데히드(HCHO), 라돈(Radon), 석면(Asbestos), 일산화탄소(CO), 이산화탄소($CO_2$), 이산화질소(NO$_2$), 오존(O$_3$), 미세 먼지(PM10), 부유세균 등 유해오염물질(contaminants)이 존재하고 있다. 또한, 실내공기오염은 각 오염원에서의 유해오염물질 방산정도(emission rate)가 실내외 환경조건, 적용 건축자재의 종류 및 공법 , 환기설비의 특성 및 유형 등에 따라 큰 차이를 보이고 있으므로, 이에 대한 정확한 측정방법의 정립과 그에 따른 적절한 실태조사의 실시가 필요하다. (중략)

• Journal of Advanced Marine Engineering and Technology
• /
• v.36 no.4
• /
• pp.445-450
• /
• 2012

At the limited space, the air conditioning may have difficult to control temperature or humidity for home use. Nowdays, the people reponse to temperature or humidity sensitively. This becomes the Indoor Air Quality (IAQ) is an important factor for comfortably. Heat recovery ventilator (HRV) is used for the solution of inconsistency between IAQ and power-saving. Also, the thermoelectric element is applied to HRV and compared with temperature efficiency and verifying the capacity of the system. To improve the temperature efficiency a single motor and thermoelectric element with the conductive guide vane is experimented. The results shows that it can save 23 W by using the single motor. The developed system of 250 CMH capacities with the thermoelectric element reveals the temperature efficiency improvement of 4.01% in cooling period and 2.98% in heating period compared to the conventional system.

• Transactions of the Korean Society of Mechanical Engineers
• /
• v.14 no.5
• /
• pp.1272-1281
• /
• 1990

A numerical study to predict the contamination behavior in a room being contaminated has been performed. The room with one inlet and three exits, which maintained same pressure at the ceiling, has been chosen as test model. Six sets of calculation have been performed, for one, two or three contamination sources of 1*10$^{-4}$ kg$_{c}$/s strength at two different velocities(0.2m/s, 20m/s). Numerical results show that the number the contamination concentration near the first source increased by every 20%-30% of the maximum concentration for each increase of the contamination source.e.

• Journal of the Korean Institute of Gas
• /
• v.25 no.3
• /
• pp.27-38
• /
• 2021

We devised the system to automatically shutdown the boiler and to fundamentally block the harmful gases, including carbon monoxide, into the indoor when the exhaust system swerves: (1) The discharge pressure of the exhaust gas decreases when the exhaust pipe is disconnected. The monitoring system of the exhaust pipe is implemented by measuring the output voltage of APS(Air Pressure Sensor) installed to control the amount of combustion air. (2) The operating software was modified so that when the system recognizes the fault condition of a flue pipe, the boiler control unit displays the fault status on the indoor regulator while shutting down the boiler. In accordance with the ventilation facility standards in the "Rules for Building Equipment Standards" by the Ministry of Land, Infrastructure and Transport, experiments were conducted to ventilate indoor air. When carbon monoxide leaked in worst-case scenario, it was possible to prevent poisoning accidents. However, since 2013, the number of indoor air exchange times has been mitigated from 0.7 to 0.5 times per hour. We observed the concentration exceeding TWA 30 ppm occasionally and thus recommend to reinforce this criterion. In conclusion, if the flue pipe fault detection and the indoor air ventilation system are introduced, carbon monoxide poisoning accidents are expected to decrease significantly. Also when the manufacturing and inspection steps, the correct installation and repair are supplemented with the user's attention in missing flue, it will be served to prevent human casualties from carbon monoxide poisoning.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
• /
• v.30 no.2
• /
• pp.7-11
• /
• 2001

건물이 고층화, 대형화, 고급화 됨에 따라 쾌적한 실내 공기를 유지하기 위한 욕구도 점점 증가하고 있으며 쾌적 공기조절 요소인 온도조절, 습도조절 및 환기기유지 등을 위한 전달매체인 덕트의 중요성이 점점 증대되고 있다. 본 원고에서는 공조시스템의 원활한 운영을 위하여 적용되는 덕트의 종류, 재질, 시공방법 등을 개략적으로 소개하고자 한다.

• Land and Housing Review
• /
• v.14 no.4
• /
• pp.103-110
• /
• 2023

People who spend most of their day indoors are continuously exposed to internally and externally generated indoor pollutants. According to a 2022 report from the World Health Organization (WHO), air pollution is the cause of more than 7 million deaths annually worldwide, emphasizing the seriousness of indoor air pollutants. Air pollutants include nitrogen oxides (NOx), formaldehyde (HCHO), and volatile organic compounds (VOCs), which have serious effects on the human body. Photocatalyst is a material that can remove these indoor air pollutants. Photocatalysts not only have the ability to remove dust precursors, but also have antibacterial, sterilizing, and deodorizing functions, making them effective in improving indoor air quality. This study suggests areas and methods in which photocatalysts can be applied to buildings. Fields of application include interior and exterior construction materials such as concrete, as well as organic paints and ventilation devices. If appropriate utilization plans are developed, it may be possible to improve the built environment through reduced indoor and outdoor pollutant levels.