공기청정 겸용 전열교환 환기유니트 적용시 실내공기환경 CFD 시뮬레이션

이정재,이시환,김용경,박성관 대한건축학회 2005 대한건축학회논문집 Vol.21 No.3

Recently, indoor air pollution problem is happening in apartment housing due to the use of new building materials that emit poisonous chemical such as Volatile Organic Compounds (VOCs) and Formaldehyde (HCHO) etc. Therefore, the issues about security of healthy dwelling environment is becoming important. There are the methods to reduce indoor air contaminant. First, source control which is the method to control the emission of contaminant from building materials. Second, adopting the air cleaning and ventilation system which is the method to dilute the concentration of contaminant and exhaust the contaminant to outside of the building quickly. In this research, we evaluated the improvement effect of the indoor air quality quantitatively by using CFD(Computational Fluid Dynamics) simulation on the assumption that air cleaning and ventilation system is installed.

PHI기술을 이용한 신축공동주택 베이크아웃 실험 및 적용성 검토

이정재,문성민,최석용 東亞大學校 建設技術硏究所 2007 硏究論文集 Vol.31 No.1

Building materials which are not properly verified their harmful chemical emission have been widely used in architecture. The fact has caused air pollution and become a big issue in Korea. As living environment for human body became a concern, many studies about reducing air pollution in living areas are going on nowadays. This study analyzed the resisting effect of HCHO and VOCs based on data obtained from experimentation on newly built apartments by PHI cell, which has been used in developed countries(like the usa), and by bake-out, also analyzed about energy expenditure of bake-out and PHI operation. The result of this experiment shows that PHI is more efficient than bake-out as considering the contaminate density reduction rate and energy expenditure. However, it doesn’t exactly coincide with the standard indoor air quality of Korea. For practical use of PHI system, we need to continue studying how to multiply the size of PHI cell and the fan adhered to unit.

경남지역의 신축공동주택 실내공기질 실태조사에 관한 연구

이정재,최석용,김상희 東亞大學校 建設技術硏究所 2006 硏究論文集 Vol.30 No.1

Recently, there has been growing concern regarding Indoor Air Quality(lAQ) so that IAQ problems from insufficient ventilation and emission of toxic substance have become increasingly important issue. Although "regulation for air quality in the public buildings" was passed in May 2004, there are no criteria for IAQ of the new apartment housings in that rule however it is difficult to indicate the correct judgement grounds about IAQ to residents and to limit using building material which causes Sick House Syndrome(SHS). The government has been making "IAQ criteria of the new apartment buildings" since 2004, in order to determine properness of IAQ and present it to residents. For the purpose of grasping status on IAQ levels of the new apartment housings in this study, IAQ of approximately new eighty apartment buildings in Gyeungnam area was measured and The result of field survey of IAQ will be used to make Data Base for criteria about "IAQ of the new apartment housings".

傳統家釀酒에 利用된 起酒에 관한 文獻的 考察

錢精日 동아시아식생활학회 2000 동아시아식생활학회지 Vol.10 No.3

Information about the processing method of additional starter can be found in the 39 traditional kinds of classical literature. The traditional of Yakju, was analysed and classified according to classical literature consist of 105 items relating to starters on those compounded alcoholics, 105 selected items were distributed among 5 groups of alcoholic beverages: processing methods of starter, additional starters for sweet and alcoholics, additional starters for Kwahaju, and those additional function for quality and quantity to the periodical conversion of the processing method through four centuries.

서모 사이펀식 히트파이프를 이용한 건식 바닥난방시스템의 제안 및 성능평가

이정재,김용경,최석용 대한건축학회 2005 대한건축학회논문집 Vol.21 No.3

This research proposes a prefabricated floor heating panel system which is optimized through the real-scale model experiment. This system is alternated Cross Linked Poly-ethylene Pipe (XL pipe) by using thermo siphon type heat pipe that is used for a heat transfer tool in machine field. When applied this system to floor heating, floor surface and room temperature, operation form of boiler etc. are enough scope to apply to floor heating. Merely, the change of temperature of floor surface is serious because of no heat storage layer. This is the point to supplement through the optimization research hereafter. When we examine the data which is gained through the operating for 37days in winter, energy consumption characteristic between two systems turned at below zero 1.5℃. That is, heat pipe system was construed that energy expenditure of XL system is much more in lower than below zero 1.5℃.

三日酒와 三日 基以內로 빚어지는 우리나라의 速成酒 : Ⅱ. 찹쌀로 빚은 速成酒 Ⅱ. About Brewing from Glutinous Rice

錢精日,申敏子,崔榮辰,金賢淑,李惠靜,鄭在洪,白淑殷 동아시아식생활학회 1999 東아시아食生活學會誌 Vol.9 No.3

This study was carried out to understand the brewing and processing methods of rapid-brew alcoholic beverage. In the contents of 45 classical records, there were 68 items about rapid-brew alcoholic beverage and single and double brew alcoholic beverage. Those alcoholic beverage of 68 items above, were made from green grown at that time-rice, glutinous rice, regular rice. Selected 38 items among those brewages, alcoholics from glutinous rice, were distributed into 4 patterns. Four patterns, grounded on rapid-brewing and processing methods, were set one thing to another and analyzed.

Task-ambient 공조세스템의 온열환경 및 에너지 절약성에 관한 실험적 연구

이정재,김용경,김동한 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2

Generally, the proportion of energy consumption in office building is approximately 3094 for air-conditioning and 30% for lighting. Therefore, reduction of energy related air-conditioning is the point of energy saving in building. However, because reduction of energy for air-conditioning is closely concerned occupant s health and pleasantness, the design of improving the second side on air-conditioning is the best plan to satisfy energy saving and pleasantness in the room. In addition to, change of temperature set up is the simplest energy saving method. Take notice of this point, we proposed task-ambient air-conditioning system as a new concept of personal air-conditioning system in office building, and actually made it and quantitatively investigated it s thermal environment and efficiency of energy saving through experimentation on this study.

주택용 환기시스템의 덕트설계를 위한 분배기 적용성 검토

이정재,최진혁,주성용 東亞大學校 建設技術硏究所 2007 硏究論文集 Vol.31 No.1

Although these days application of heat recovery ventilation and improved kitchen ventilation system came into wide use in mixed-use residential Buildings and exclusive residences, there are not enough ventilation systems except the local ventilation of kitchens and rest rooms. It is very important part to regulate and distribute correct air flow rate for controlling air change rate. The purpose of this study is to investigate the application of distributor at house ventilation system by comparing a duct system without distributor and with distributor. The results of this study are as follows. (1) When using distributor though the size of duct diameter is reduced rapidly, the pressure loss doesn’t rise largely. The pressure loss without distributor is 4.08 mmAq, the pressure loss with distributor 4.10 mmAq. (2) To use distributor can reduce materials of duct and secure enough ceiling space by reducing duct diameter. (3) Diameters and air flow paths of distributor on the design stage are important part for accurate air flow rate. 21 세기는 환경에 대한 고려 없이는 쾌적한 삶과 지속가능한 경제발전이 불가능한 시대 이다. 특히 요즘 건축물에서 고기밀, 고단열 을 강조하고 있으며,근래 건축기술의 발달과 토지이용의 효율화에 따라 20층 이상의 초고층 공동주택의 건설이 늘어나고 있으나 (Moon, J.S, 2004), 고충부분에서는 환기의 어려움이 발생하는 실정이다. 동시에 새 건축물의 자재나 도료에서 발생되어 호흡계 증상 및 신체의 부조화를 일으키는 새집증후군의 원인물질인 포름알데히드, 휘발성 유기 화합물질 등에 대해서는 대책이 미비한 실정이다. 때문에 국내 건축법의 환기기준이 강화되어 기존의 자연환기에만 의존했던 것과는 달리 2006년 l 월부터 건축법령에서 정한 신축되는 공동주택의 필요환기횟수는 0.7회이며, 이 기준을 충족하지 못할 경우 기계 환기 설비의 설치가 필요하게 되었다. 기존의 공동주택에서 환기시스템이 적극적으로 도입되기 어려웠던 이유는 설치비용의 경제성 문제뿐만 아니라 천장부분의 공간 부족으로 덕트 설치의 어려움이 있었으나 2005 년 l 월부터 시행되어진 소방법에 의해 11 층 이상의 공동주택에서는 전층에 스프링클러를 설치해야함에 따라 천장공간이 확보되어 덕트 설치 또한 가능하게 되었다. 환기시스템이 공동주택에 적용될 경우, 일반적으로 환기유나트 본체에서 각 실까지는 덕트를 통하여 신선한 공기가 공급된다. 주택환기시스템 덕트 설계의 경우, 소 풍량 으로 운전되므로 정확한 치수의 덕트 설계가 요구되며 24시간 가동을 전제로 하기 때문에 덕트내의 압력손실감소와 적절한 팬의 선정은 에너지 손실방지를 위해 반드시 고려되어야 할 부분이다.

환경친화건축을 위한 기후맵 작성방안에 관한 연구 : 부산·경남지역 기후존 설정을 중심으로 Focused on Setting Climate Zone in Busan·Gyeongnam Area

이정재,조용수,도근영 대한건축학회 2003 대한건축학회논문집 Vol.19 No.12

Recently the ecological building design has been considered to be very important as the interest has been gathered on environmental problems of the earth. For the ecological building design, it is essential to understand regional climatic characteristics correctly. But as no architect can ever study all of microclimate found in the specific region, architects must use the available published data and modify it to fit their specific site. For this purpose, long term weather data on the broad area are necessary but in Korea weather data can be collected from only sixty nine weather station. In this paper, therefore, the climate regions are divided and climate map(climate data table) is framed using the AWS(Automatic Weather monitoring System) data of 43 station and the data of 11 meterological observatories and weather station in Busan·Cyeongnam area.

신축아파트에서의 환기량 변화에 따른 실내공기질 개선효과

이정재,최석용,김상희 東亞大學校 建設技術硏究所 2006 硏究論文集 Vol.29 No.2

The recent indoor air quality problem in a newly-built apartment house is resulted from the improvement of airtightness performance and the use of the building material contained harmful chemical substances. As a result, these cause indoor air quality gradually to become worse and the harmful effect on occupant health called Sick House Syndrome. The most effective solution to improve the indoor air quality is to encourage the use of green building material. However, if the house is built with general building material, ventilation with outdoor air is alternative to dilute the pollutant concentration. The purpose of this research is to find optimum ventilation time in a newly-built apartment house at which the ventilatoris installed. It is found that the HCHO and toluene concentrations are remarkably decreased with the elapse of ventilation time and the concentration reduction rate is increased with increment of air change rate after one hour after operating the ventilator.