• Title/Summary/Keyword: Indoor air environment

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Evaluation on comfort in P.C. Apartment (공업화 주택의 쾌적성에 대한 거주자 반응)

  • 이지숙
    • Journal of the Korean housing association
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    • v.8 no.2
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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 .

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Management Policy and Control Technology for Indoor Air Quality in Korea (국내 실내공기질 관리정책의 변천 및 제어기술의 현황)

  • Bae, Gwi-Nam;Ji, Jun-Ho
    • Journal of Korean Society for Atmospheric Environment
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    • v.29 no.4
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    • pp.378-389
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    • 2013
  • In Korea, studies on the indoor air quality have been conducted since mid of 1980s. The turning point occurred in 2003 by establishing the act of the indoor air quality management for public facilities. According to the law, the basic plan for indoor air quality management is prepared by government every five years, affecting greatly governmental policy and related academia and industries. Indoor air quality survey was mostly carried out among indoor air quality researches. After then, assessment of health effect and air cleaning technology were studied. Although various control technologies for particle, bioaerosol, odor, and hazardous chemicals have been applied to indoor environments, breakthrough technologies are needed to solve real problems facing at the applied environments. In the future, issue of indoor air quality is more interested and both management policy and control technology are key factors in order to realize comfort and healthy indoor environments.

Present and Future Perspectives of Studies on Indoor Air Quality (室內空氣質 硏究의 現況과 展望)

  • 김윤신
    • Journal of Korean Society for Atmospheric Environment
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    • v.15 no.4
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    • pp.371-383
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    • 1999
  • This paper discusses the importance of indoor air quality based on literaure review of domestic and foreign studies. A number of international efforts to propose standards and guidelines for indoor environmental quality are also reviewed. The pattern of major studies on indoor air quality focussed on characterizaton of gaseous pollutants, particulates, and other specific pollutants during the past decades, whereas VOCs, specific carcinogen, and microbiological agents might be good target pollutants to investigate the effects of human health in recent years. Management of indoor air quality requires a different approach than that adopted for outdoor air. Adequate ventilation of the indoor environment is essential, and a balance between energy conservation and the need for good air quality is required. The ways for managing indoor air quality that will be of great importance are discussed a role of control policy for guidance on how to achieve good indoor air quality.

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Sensitivity Analysis of Indoor Environment Factors along with Changes of Outdoor Air Condition (외기상태의 변화에 따른 실내 환경인자의 민감도 분석)

  • Cho, Seok-Ho
    • Journal of Environmental Science International
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    • v.19 no.2
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    • pp.125-136
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    • 2010
  • The most important factors relating to the indoor air environment are temperature, airflow, humidity, and contaminant concentration. A sensitivity analysis of indoor environment factors was carried out to grasp influences along with changes of atmospheric conditions. An integrated multizone model was used to predict these sensitivities. This model was applied to an apartment with six zones. Airflow rates are influenced very seriously by changes of wind direct or wind velocity, but are influenced very slightly by changes of outdoor air temperature and are not influenced at all by changes of outdoor air humidity or contaminant concentration. Indoor air temperatures are influenced very directly by changes of outdoor air temperature, but are influenced very slightly by wind direction or wind velocity and are not influenced at all by changes of outdoor air humidity or contaminant concentration. Indoor air humidities are influenced very directly by changes of outdoor air humidity, but are not influenced at all by changes of outdoor air contaminant concentration and have little or no influence by changes of wind direction, wind velocity, or outdoor air temperature. Indoor air contaminant concentrations are influenced very seriously by changes of wind direct or wind velocity, but are influenced somewhat by changes of outdoor air contaminant concentration and are influenced very slightly by changes of outdoor air temperature and are not influenced at all by changes of outdoor air humidity.

A Study on the Assessment of the IAQ during Nightime (공동주택에서 취침 시 실내공기환경 평가에 관한 연구)

  • Kim, Dong-Gyu;Kim, Sam-Uell;Kim, Se-Hwan
    • KIEAE Journal
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    • v.7 no.5
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    • pp.93-98
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    • 2007
  • Effort has been performed for latest 20 years to improve resident's comfort and indoor environment in building. And interest and effort to improve indoor air environment among various indoor environment elements have continuously increased since 1990s, because it is examined scientifically that various contaminants generated indoor affect human body. Specially, indoor air contaminants generated from apartments are those exhausted from resident's indoor environment, closing materials and household. Indoor air environment in buildings is different according to pollution degree, existence availability of pollution source, ventilation amount, and meteorology. It is known that other contaminants more than about 900 kinds generate according to a kind of work or action in a room. Specially, nowadays buildings are well insulated and confidentiality-centered for environment protection and economical side. So indoor air contaminants are generated from indoor air pollution sauces of unprepared ventilation, human body carbon dioxide emissions, and various building materials. when these are accumulated in long term human body, it is harmful to resident's health, but awareness for this is very insufficient. Because bedroom is space that people inhabit for a long time by unconscious state and indoor environment occupies important part for resident's health and quality of life at sleep, the actual condition of air quality is investigated, improvement countermeasure is considered, and ventilation amount is analyzed. In this study, putting case that the most longest stayed time is sleeping time when people inhabit in the apartment, the air quality according to volume of bedroom space at sleep was measured and analyzed, and the data acquired will be the basis for improvement on this.

A Study on the Perception Level and Proper Management of Indoor Air Quality Recognition in Elderly Care Hospital Workers

  • Choi, Mi-Suk
    • Journal of the Korea Society of Computer and Information
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    • v.24 no.11
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    • pp.171-178
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    • 2019
  • In this paper, we proposed a plan for a indoor air quality management in elderly care hospital by measuring the indoor air quality level of elderly care hospital and conducting a survey the workers' awareness of indoor air quality. The measurement items were Temperature, Humidity, CO2, CO, PM10, VOC and were taken on April 26, 2019. The survey found that the lower the satisfaction level with indoor air quality, the better outdoor air quality and odor items were analyzed to be the lowest among the indoor environmental factors. When the satisfaction level of indoor air quality is high, the satisfaction level of indoor environment factor is high. The result of the multiple response analysis was "lack of ventilation" and the regression analysis was the lower the "relevance of indoor air quality" category. To provide the best indoor air quality environment for elderly care hospital workers the installation of additional ventilation equipment to remove odors, the increase in the number of natural ventilation and the designation of regular ventilation personnel will be necessary. By establishing such a plan, it is possible to provide indoor air quality environment to provide the best services for elderly care hospital workers.

A Study on the Indoor Environment of school classrooms in Seoul area (서울지역 학교 교실의 실내환경 조사연구)

  • 최한영
    • Journal of environmental and Sanitary engineering
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    • v.18 no.2
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    • pp.67-74
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    • 2003
  • In 15 schools where were chosen each location (East, West, South, North, Central) of Seoul area, 9 items were measured such as thermo circumstance(temperature, relative humidity, air current, intensity of illumination) particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide being based on the school indoor environment standard. It was showed that indoor temperature, relative humidity and air movement were suitable in comparison with school indoor environment standard. Intensity of illumination was suitable in comparison with all schools, only exception 2 schools. In all investigated schools were adequate for carbon monoxide, sulfur dioxide and nitrogen dioxide, in which each indoor environment standard (10ppw, 0.25ppm/hr, 0.15ppm/hr), but in 5 schools the carbon dioxide were exceeded for standard limit 1,000ppm of Korea. Indoor concentration of dust(PM-10) induced from respiration dust the standard of Korea ($150{\mu}g/m^3$) at all schools.

A Study on Evaluation of IAQ in Dwelling House (주거건축의 IAQ에 관한 연구)

  • 박미진
    • Journal of the Korean Society of Safety
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    • v.12 no.1
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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.

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Evaluation of Indoor Air Quality Improvement by Formaldehyde Emission Rate in School Indoor Environment Using Mass Balance (물질수지를 이용한 학교 실내환경의 포름알데히드(HCHO) 배출량 산정에 의한 실내공기질 개선 평가)

  • Yang, Won-Ho;Son, Bu-Soon;Kim, Dae-Won;Kim, Young-Hee;Byeon, Jae-Cheol;Jung, Soon-won
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.15 no.3
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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.

The Influence of Air Pollution Level on Resident's Evaluation and Cognition for Indoor Environment in Ulsan (울산지역의 대기오염 환경의 차이가 거주자의 실내환경 평가 및 인식에 미치는 영향)

  • Yoo, Bok-Hee
    • Journal of the Korean housing association
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    • v.21 no.3
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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.