• 설비공학논문집
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• 제13권2호
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• pp.115-121
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• 2001

Recently, the requirement of healthier and more comfortable environment makes the zoning domain more details. However, it has limitation to satisfy the thermal comfort of an individual because of the effect of the heat generation from the OA machine and partitions in indoor room. In this paper, we certify the validity of task-ambient air-conditioning system that has been developed as a new concept of personal air-conditioning system, and specify design strategies for more efficient task-ambient air-conditioning system with a specification guided by indoor environmental characteristics analyzed through experiment data. In this experiment, we changed the temperature and the quantity of air-flow in task domain to understand characteristic behavior of the thermal environment and investigate the possibility of energy saving. The experiment result is that the environment of the task area depends on the condition of supply air, and though the airflow of the low temperature is supplied with the ambient area, the personal environment and the efficiency of energy saving are improved by controlling the temperature and the quantity of the air shot around the task domain.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.291-296
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• 2006

The purpose of this study were to make clear the present condition of indoor thermal and air environment by air-conditioning in school classrooms and to analyze the relation of the living conditions with indoor environment. The measurements on physical elements and observations on living conditions were carried out in 6 classrooms of 3 middle or high schools. Measuring elements were indoor temperature, relative humidity, $PM_{10}$ and $CO_2$ concentration. As results, the averages of indoor temperature each classrooms were 24.9${\sim}$26.6 . Most of classrooms were lower than the Maintenance standard(26${\sim}$28 ) of School Health Law. The means of relative humidity were 51.3${\sim}$72%, all classrooms were ranged within the standard(30${\sim}$80%). The means of $PM_{10}$ concentration were 3.5${\sim}$23.1 ${\mu}g/m^3$, all classrooms were kept within the standard(100 ${\mu}g/m^3$). The means of $CO_2$ concentration were 1218.7${\sim}$4705.4 ppm, all classrooms were exceed the standard(1,000ppm). The results of analysis on relations of living conditions with the physical elements are as follow; the air conditioner set of temperature, windows and doors opening elapsed time, the number of students in classrooms and activities of students had certain effect on indoor environment.

• 한국주거학회논문집
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• 제18권4호
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• pp.49-58
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• 2007

The purpose of this study were to make clear the present condition of indoor thermal and air environment by cooling in school classrooms and to analyze the relation of the living conditions with indoor environment. The measurements on physical elements and observations on living conditions were carried out in 6 classrooms of 3 middle or high schools. Measuring elements were indoor temperature, relative humidity, PM10 and $CO_2$ concentration. As results, the averages of indoor temperature each classrooms were $24.9{\sim}26.6^{\circ}C$. Most of classrooms were lower than the Maintenance standard $(26{\sim}28^{\circ}C)$ of School Health Law. The means of relative humidity were $51.3{\sim}72%$, all classrooms were ranged within the standard $(30{\sim}80%)$. The means of PM10 concentration were $3.5{\sim}23.1{\mu}g/m^3$, all classrooms were kept within the standard $(100{\mu}g/m^3)$. The means of $CO_2$ concentration were $1218.7{\sim}4705.4ppm$, all classrooms were exceed the standard (1,000ppm). The results of analysis on relations of living conditions with the physical elements are as follow; the air conditioner set of temperature, windows and doors opening elapsed time, the number of students in classrooms and activities of students had certain effect on indoor environment.

• 정보학연구
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• 제8권4호
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• pp.1-7
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• 2005

Investigations of high frequency current transformer(HF-CT) waveform characteristics of the surface leakage on kaolin polluted EPDM polymer insulators have been performed. This work is part of a program aimed at examining the potential for HF-CT waveform characteristics analysis to provide information about the environment contaminants and environment condition of polymer insulators. The investigation reported examined the HF-CT waveform characteristics at high frequencies. The use of high frequency measurements for on-line applications reduces electrical inference. This work was peformed utilizing HF-CT to monitor of surface polluted discharge. It was found that HF-CT waveform frequency spectrum, magnitude depend on importantly the duration of the surface discharge activity.

• 해양환경안전학회지
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• 제6권1호
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• pp.57-67
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• 2000

All crude oil carries a little of water, sand, and mineral sediment molecules tightly bounded with hydrocarbons. The result is the gradual precipitation of these heavier elements into thick, granular petroleum by products known as crude oil sludge. The oily sludges in ship tanks and in storage facilities have to be treated efficiently in order to keep the security and the capacity of storage facilities, to protect a serious environmental pollution, and to retrieve lost resource. The oily sludge treatment system should be designed to satisfy requirements mentioned in safe work condition. As a basic study, in this paper, an oily sludge treatment system by ultrasonic waves was proposed. Then, the features of ultrasonic energy and recovery of sludge with ultrasonic waves are investigated by experiments. As results, we found that ultrasonic waves are a new energy to flow oil sludge environment-friendly in safe work condition. In addition, it was shown that ultrasonic energy is more efficient than thermal energy in treating oil sludge, and that the volume of wastes for disposal is reduced remarkably.

• 태양에너지
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• 제13권2_3호
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• pp.22-29
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• 1993

건물의 실내 온열환경과 에너지 소비량은 건물 주변에 형성되는 미기후에 의해 일차적인 영향을 받게 된다. 따라서 미기후의 조건을 완화 혹은 순화시켜 가능한 건물 실내조건과의 차이를 줄이는 것이 건물의 에너지절약효과를 향상시키는 첫단계이며 자연에너지를 이용한 쾌적한 거주 환경조성에 기여하는 방법이 된다. 이와같은 관점에서, 본고에서는 대지내 경관을 아름답게 해주면서 또한 미기후 형성에 그 영향도가 매우 높은 조경요소들에 대해 그 종류 및 기후조절기능을 분석하고 조경계획의 주안점을 건물 열부하에 영향을 주는 항목별로 나누어 조사, 정리하여 바람직한 조경 계획을 수립하는데 기초자료를 제시하였다.

• Journal of Nutrition and Health
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• 제19권6호
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• pp.392-401
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• 1986

Various types of restaurants in Seoul city are a were assessed in terms of facilities equipped, and dining and kitchen space allocation. Facilities checklist was developed to evaluate the facilities condition of sampled restaurants. Subjective sample were randomly selected based on the distribution factors of areas, types and sizes. The facilities for the sanitary working environment were assessed as the insufficient condition. Also basic kitchen equipments and facilities, and restroom facitilities of restaurants were within the kitchen or dining room space allowance level. Space requirement and facilities standard models were developed for the guideline to improve the working environment.

• 디자인학연구
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• 제15권4호
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• pp.215-222
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• 2002

본 연구에서는 지금까지 단지 교통광장으로서 사용되고 있는 역전 광장들의 기능을 통하여 시민들이 적극적으로 이용할 수 있는 도시내의 시민 광장으로서의 사용 가능성을 타진하고자한다. 그 노력의 일환으로 본 연구에서는 광장에 대한 일반적인 고찰, 역전광장에 대한 현황분석, 역전광장의 물리적 환경을 분석하고 그에 따른 문제와 현황을 파악하여 도심속 시민휴식공간으로서 역전광장의 가능성을 찾는데 기초자료 추출을 목적으로 한다.

• 한국주거학회논문집
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• 제14권1호
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• pp.61-66
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• 2003

Considering the present outdoor environment of city landscapes, the improvement of well-formed street landscapes is a very important issue in Korea. At this point of time, it is very meaningful to understand the sign design and the planning condition of buildings and examine various problems about this and the possibilities for improvement. Thus the purpose of this study is to accumulate basic data to establish design guideline and visual factors for the sign design for useful environment. The conclusions of this study are as follows: to understand the factors of sign designs is through survey and analysis of building condition and city landscape. Planning factors for outdoor advertising design should be developed systematically and more fit to the street environment and designers in the aspect of control and guidance.

• Fibers and Polymers
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• 제4권4호
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• pp.215-221
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• 2003

A vertical skin model with two detachable environmental chambers was developed to simulate a Human-Clothing-Environment system and to evaluate heat and moisture transport properties of textile materials under severe conditions and during transient states. The construction of the system was described and data reproducibility and accuracy of the instrument were verified by using PEG treated nonwovens. Also advantages over a traditional static type experiment were demonstrated based on a series of experiments.