• 한국산업보건학회지
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• 제15권3호
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• pp.160-165
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• 2005

Schools have significant and serious indoor environmental health problem, of which indoor air quality (IAQ) in school building may affect the health of the students and indirectly affect learning performance. Schools are of special concern when regarding indoor exposure to air pollutants, because students are particularly sensitive to pollutants and spend a significant amount of time in that environment. Therefore researches for improvement of indoor air quality have been developed such as installation of air cleaning device, ventilation system, titanium dioxide(TiO2) coating and so on. However, it is difficult to evaluate the magnitude of improvement of indoor air quality in field study because indoor air quality can be affected by source generation, outdoor air level, ventilation, decay by reaction, temperature, humidity, mixing condition and so on. In this study, evaluation of reduction of formaldehyde emission rate in school indoor environments by far-Infrared ray coating material was carried out using mass balance model in indoor environment. we proposed the evaluation method of magnitude of improvement in indoor air quality, considering outdoor level and ventilation. Since simple indoor concentration measurements could not properly evaluate the indoor air quality, outdoor level and ventilation should be considered when evaluate the indoor air quality.

• 한국주거학회논문집
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• 제21권3호
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• pp.87-94
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• 2010

The aim of this study was to evaluate the influence of air pollution level in industrial and residential district of Ulsan on resident's evaluation and cognition for indoor environment. The evaluation of air pollution materials (as $SO_2$, $NO_2$, $O_3$, CO, PM10) were investigated to understand the distributional characteristics in survey area, and air quality monitoring data from 2007 to 2009 were used. The data was applied in a realtime measurement of industrial and residential area respected to difference of the pollution level in Ulsan. The questionnaire of this survey for resident's cognition was to find out characteristics on perception of indoor environment and outdoor air quality recognition based on the distinct characteristics of the areas. The results of this study shows that resident's satisfaction at clean level outdoor air and indoor environment were different whether it was residential area or industrial area and outdoor air pollution level has direct influence on resident's satisfaction in indoor environment.

• 대한가정학회지
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• 제35권5호
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• pp.213-219
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• 1997

The purpose of this study is to propose a model for evaluating comfort of indoor environment based on residents' subjective respones. The questionnaire survey was given to the residents at apartment complex located in Ilsan, Kyunggi-Do. The following are the results obtained in this thesis. The results of path analysis on comfort revealed that direct effects to comfort were the satisfaction on thermal environment, indoor air environment and sound environment, and the cognition on indoor air environment and sound environment. An evaluation formula of comfort by the factors of direct effects was given. This formula is recommended to evaluate comfort for pp.O.E(post occupancy evaluation)by residents.

• 한국환경과학회지
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• 제15권10호
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• pp.913-918
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• 2006

Despite the wide distribution of air pollutants, the concentrations of indoor air pollutants may be the dominant risk factor in personal exposure due to the fact that most people spend an average of 80% of their time in enclosed buildings. Researches for improvement of indoor air quality have been developed such as installation of air cleaning device, ventilation system, titanium dioxide$(TiO_2)$ coating and so on. However, it is difficult to evaluate the magnitude of improvement of indoor air quality in field study because indoor air quality can be affected by source generation, outdoor air level, ventilation, decay by reaction, temperature, humidity, mixing condition and so on. In this study, evaluation of reduction of formaldehyde and nitrogen dioxide emission rate in indoor environments by $TiO_2$ coating material was carried out using mass balance model in indoor environment. we proposed the evaluation method of magnitude of improvement in indoor air quality, considering outdoor level and ventilation. Since simple indoor concentration measurements could not properly evaluate the indoor air quality, outdoor level and ventilation should be considered when evaluate the indoor net quality.

• 설비공학논문집
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• 제17권5호
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• pp.397-403
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• 2005

The thermal comfort of occupants is directly related to several environmental factors such as velocity of air flow, turbulence intensity and temperature distribution of indoor air. The purpose of this study is to evaluate the indoor air flow and temperature distribution in office area using under-floor air-conditioning system (UFAC System) based on the results from physical measurements and to perform a Computer Fluid Dynamics (CFD) under the same condition of inlet and outlet as field measurement. The results from the CFD simulation are similar to those from the field measurement. The results show that UFAC system is provide proper indoor condition for occupants.

• 한국안전학회지
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• 제12권1호
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• pp.108-112
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• 1997

Recently, the use of Dwelling House has been expanded due to the rapid urbainzation and congestion of population in City. Indoor Air Quality in apartment houses was investigated by measuring pollutants such as $CO_2$ gas, dust concentration. In this study, the mesurements of indoor air environment were performed in Dwelling house in Seoul area to investigate indoor air environment and the relation of air contaminative and the response level. Indoor air contamination and living environment of the occupants have been compared & analyzed with practical investigation of IAQ in Seoul, Korea and Tokyo, Japan.

• 한국주거학회논문집
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• 제8권2호
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• pp.107-112
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• 1997

This thesis is dealt with the thermal environment, the indoor air environment, the sound environment and the light environment in P.C apartment house. The purpose of this study is to analyze degrees of 'the cognition'. 'the importance', and ‘the satisfaction' on indoor environmental factors and to evaluate comfort of indoor environment based on residents' responses. The questionnaire survey was given to the residents at P.C apartment complex in Rowon-Gu, Seoul. The following are the results obtained in this thesis. The results of Path analysis on comfort revealed that factors of direct effect to comfort were the satisfaction on indoor air environment and sound environment and the cognition on indoor air environment and sound environment. The satisfaction on indoor air environment was the biggest variable which decided the comfort. By the survey of P.C apartment residents' responses, the level of P.C apartment indoor comfort was found uncomfortable. It is meaningful to su99est the model evaluating comfort by residents' responses .

• KIEAE Journal
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• 제10권3호
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• pp.3-10
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• 2010

As indoor air quality directly affects health and comforts of the residents, researchers from different countries have continued to explore criteria by which indoor air quality can be indicated in a scientific and quantitative manner over the past several decades. However, there are many possibilities that can deteriorate indoor air quality. Due to the uncertainty of influence factors, it is quite difficult to develop a correct evaluation model and quantitative method. Furthermore, the effects from the indoor air pollutants have different levels, leading to the difficulties to apply the regular standard. This study aims to propose evaluation criteria by using the FD-AHP analysis. Obtained findings will be beneficial to construct apartment buildings, commercial buildings and others health performance evaluation framework.

• 한국생활과학회지
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• 제19권4호
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• pp.745-760
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• 2010

The purposes of this study were to investigate the state of indoor thermal and air environment during winter in the one-room type multi-family houses occupied by university students and to analyze factors which influenced this environment. Field survey was conducted in 10 houses between 30th January, 2009 and 13th February, 2009 which measured indoor thermal and air elements as well kept records of interviews with residents and other related factors. Measured elements were air temperature, relative humidity, as well as concentrations of $CO_2$, CO, TVOC, and PM-10. The results can be summarized as follows. 1) The mean air temperature in each house ranged from 19.3 to $25.3^{\circ}C$, so most houses were not suitable for evaluation criteria($20-22^{\circ}C$). The average $CO_2$ concentration in each house was 965~3259ppm, so most houses exceeded evaluation criteria(1000ppm). The average TVOC concentration in each house were 0.00~1.17ppm, 5 houses exceeded evaluation criteria(0.12ppm). 2) Relative humidity, CO concentration, and PM-10 concentration were suitable for evaluation criteria. Therefore, indoor thermal and air environment during winter in one-room type multi-family housing occupied by university students was found to be generally uncomfortable. Important factor which were found to influence air temperature and the concentration of $CO_2$ were smaller space capacity than general house. Other factors which were found to influence the environment of these houses were the existence of a balcony as well as factors relating to the behavior of occupants such whether or not heating were operated, whether windows were opened, whether fans used, whether occupants smoked or used cosmetics, and whether the space was dusted.

• International Journal of Air-Conditioning and Refrigeration
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• 제9권3호
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• pp.36-45
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• 2001

During the last decade, an increasing interest in Underfloor Air-Conditioning (UFAC) systems has emerged. The purpose of this paper is to evaluate the indoor environmental performance of office buildings with UFAC system in order to develope the design prototype of this system. The physical measurements and the Interviewing survey of occupant's sensation responses to the environment were carried out. Measurements and survey were made of the thermal environmental factors such as air temperature, relative humidity, air velocity, globe temperature, and the other several environmental factors such as the sound level and the illuminance of working plane, etc. And, the air quality was evaluated by measuring the concentration of suspended particles, carbon monoxide, and carbon dioxide in the room. Furthermore, the paper appraises the various indoor environmental factors of the room by using post-occupancy evaluation (POE) method in office building with UFAC system, and thus, it suggests the basic data for assessing the indoor comfort based on field measurements and survey .