• Journal of Advanced Marine Engineering and Technology
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• v.21 no.3
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• pp.229-235
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• 1997

The comparison of radiative and convective heat transfer in a room air ventilation is investi¬gated by a numerical simulation. The room air temperature distributions with radiation are appeared more uniform than without radiation at Gr= 1460 and Re=50. The mean Nusselt number in the radiative heat transfer shows less value than convective heat transfer. The total mean Nusselt number is found Wall 1> Wall 3${\fallingdotseq}$Wall 2 7 Wall 4.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.32 no.11
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• pp.63-68
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• 2003

주방환기의 계획에 있어서 조리시 발생하는 오염물질을 적절히 배기시키는 것이 가장 중요하다. 기구의 배치와 발열량을 평가하고 후드의 위치와 종류 그리고 덕트직경과 경로를 결정하며 적정한 풍량을 제거하기 위한 배기팬을 선정한다. 그러나 일반적인 실내 공기밸런스 계획을 시행함에도 불구하고 배기된 체적에 해당하는 풍량을 보충 공급하는 방식에 대한 고려는 현재 상대적으로 부족한 상태이다.

• The Journal of the Korea institute of electronic communication sciences
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• v.14 no.6
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• pp.1215-1220
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• 2019

Currently, each farm bears both the outbreak of foot-and-mouth disease and the damage caused by AI. In addition, complaints about odors in the livestock industry are constantly being recovered and are expected to occur in the future. The purpose of this study is to improve the indoor air quality of enclosed facilities such as barns, houses, pigsty, and etc. This paper develops low-temperature plasma waste heat ventilation system to be installed in ventilation unit location and standardizes heat exchange element, low-temperature plasma lamp, and ballast for enhanced air cleaning function. In addition, this study intends to develop a new control system so that the farmers can connect with existing weather systems, flow fans, and other facility equipment by incorporating ICT.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.32 no.9
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• pp.46-51
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• 2003

"환기"는 생활용품 등으로부터의 오염물질 및 불특정 물질의 농도 저감이 가능하기 때문에 Sick House 대책으로서의 중요한 대책기술이다. 본 고에서는 집합주택을 대상으로 한 중앙공조 환기방식 및 배기 중앙 환기방식의 사례를 보여주고, 시스템의 구성기술과 오염물질의 농도 저감효과에 대해서 기술한다. 또한, 대표적인 오염물질인 포름알데히드의 건자재로 부터의 발산량은 온습도, 환기량 및 건자재의 표면적 비율 등의 영향인자에 따라 변화하므로, 필요 환기량은 이들의 영향요인을 고려하여야 한다는 것을 기술한다.

• Environmental engineer
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• s.61
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• pp.4-7
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• 1991

실내공기가 오염되었을 경우는 궁극적으로 환기를 강화시켜야함은 주지의 사실이다. 최근 미국의 ASHRAE에서는(1989년) 1인당 필요한 최소 외기량을 9$m^3$/hr/인에서 27$m^3$/hr/인까지 증가시키고, 흡연실과 금연실을 분리하지 않고 전체적으로 필요한 외기량을 설정하였다.

• Resources Recycling
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• v.15 no.3 s.71
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• pp.30-37
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• 2006

For keeping the indoor air quality, we develop the pulsating heat pipe(PHP) type heat recovery ventilator using an used radiator for vehicles. We compare the PHP type with existing model. There are some merits that are able to change the unit number according to heat load and show us the similar performance to existing models.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.3
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• pp.551-558
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• 2021

In this paper, we made the integrated intelligent air ventilation of the actuator module that can be remotely controlled based on IoT and sensors. we implemented a ventilation window system by configuring an algorithm design and a driving circuit to control the operation of the actuator to open and close the ventilation port based on a predetermined number of data that detects indoor gas/CO2/humidity temperature and outdoor fine dust related indoor/outdoor environment. It is difficult to store, manage, and analyze data due to the large number of sensors and conditions for the transmission data of indoor air circulation module. The remote monitoring and remote wireless control screens were constructed to automate the separation and operation conditions by extracting and managing the state. We apply MQTT to enhance big data transmission and construct the system using Rocket MQ to ensure safe transmission of operational big data against system errors.

• 보일러설비
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• no.3 s.158
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• pp.144-147
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• 2007

원자재 가격 상승과 달러화 약세 등의 영향으로 내수시장과 수출시장 모두에서 어려움을 겪고 있는 보일러 제조업체들이 일제히 환기시장으로 눈을 돌리면서 시장 쟁탈전이 뜨거워 지고 있다. 실내공기 오염악화를 이유로 공동주택과 관련 시설 등에 대한 환기시스템 설치를 의무화하는 '다중이용시설 실내공기질 관리법'이 지난해 발효되면서 주택 환기시스템 관련 수요는 매년 확대될것으로 전망되고 있기 때문이다. 실제로 환기시장 규모는 2004년 500억원대에서 2005년1000억원 규모로 성장했고 지난해에는 2200억원대를 기록했다. 업계관계자들은 올해 환기시장의 규모를 약 3500억원대로 예상하고 있고 내년에는 5500억원대까지 성장할 것으로 전망하고 있다. 이에 따라 이 시장에 진출한 보일러사들은 일제히 신제품을 발표하고 나섰고 최근에는 경동나비엔과 대성쎌틱이 새롭게 시장에 진입한 상태다. 주요 보일러사들이 출시한 환기시스템의 특장점과 마케팅 방향등에 대해 알아봤다.

• Journal of Navigation and Port Research
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• v.33 no.3
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• pp.175-180
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• 2009

In this study, the basic data were collected for improving the amenity of indoor environment of a super yacht and the performance of indoor environment was analyzed by utilizing measured data during summer period. Through the results of examination, the following conclusions are drawn. 1) It is estimated that, in case of closing the door of Saloon connected with outside, there is little inflow of exhaust gas, but when the door is open, the indoor-air might be polluted so fast. Therefore, it is necessary to make a counter plan about the method of ventilation and amount of ventilation to keep the indoor aerial environment agreeable. 2) It is urgent to conceive countermeasure against engine noise because the noise level of all rooms exceeds 60dB, which is regulation of noise for protecting crew established in ship's classification, during the sailing. 3) State cabin and Guest cabin are super cooled by operating air conditioner exceeding agreeableness extent and it is needed to prevent them.

• Journal of dental hygiene science
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• v.8 no.1
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• pp.35-42
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• 2008

This survey was compared and analyzed about the primary factor that dental office's working environment effect on physical subjective symptom and based on self-filling survey, 656 dental hygienists on July through August 2006, and analyzed using descriptive statics, ANOVA and Multiple Regression Analysis. The result of satisfaction degree of hospital working environment was pretty low about office air condition. Most people have complained that office's air quality makes it difficult to their work and mentioned that they were sore and dull all over the back, shoulder, and neck. The odor is major factor to be satisfied with office environment. Proper ventilates the way open the window more often was essential to maintain fresh indoor air quality and keep the extraction materials by separator and sealing tightly for remove the odor. Other factors were temperature, lighting fixture, ventilation facilities, and freshness of air. Dental hygienist was unsatisfied with hospital air condition and this polluted air condition was the cause of physical subjective symptom in work place. Furthermore, this research would be applied for improvement of working environment by decreasing of indoor air pollution.