• 제목/요약/키워드: Environmental noise standard

검색결과 140건 처리시간 0.026초

화력발전소의 소음분포 해석 및 방음벽 대책 (Noise distribution analysis and noise barrier measures of thermal power plant)

  • 윤준호;김원진
    • 한국음향학회지
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    • 제39권2호
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    • pp.105-112
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    • 2020
  • 발전소 소음을 저감하기 위해서는 여러 가지 설비요소의 소음원에 대해 설계단계에서부터 정확한 소음예측을 수행하고, 과도한 소음에 대해서는 효과적이고 경제적인 방음대책의 수립이 필요하다. 이에 본 논문에서는 발전소 지역 및 주변 주택지역을 포함한 소음분포 해석 가능 모델을 제안하고, 주택지역의 소음저감 방법을 수립하였다. 발전소의 주요 소음원에 대한 소음레벨의 측정을 통하여 음향파워레벨을 평가하고, 설계도면 및 지형정보를 이용하여 소음전달에 영향을 주는 지형 및 지물 등을 최대한 상세히 모델에 포함함으로써 발전소 및 주택 지역의 소음분포를 효과적으로 해석할 수 있는 모델을 수립하였다. 수립된 소음 해석 모델의 신뢰성은 주요 위치에서의 소음레벨 해석 결과와 측정 결과를 비교하여 검증하였으며, 이를 바탕으로 신규호기의 증설에 의한 인근 주택지역에서의 소음 영향도를 평가하고, 발전소의 가동 시에 소음환경기준을 만족시키는 방음벽을 제안하였다.

함정운용 유도탄 전기체(全機體)의 진동충격 환경시험 (A Vibration and Shock Environmental Tests for the Missile Installed in the Naval Vessels)

  • 권병현;권종화;안성우;이호준
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 춘계학술대회논문집
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    • pp.809-812
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    • 2005
  • This paper explains environmental tests of vessel-launched missiles, verifying if a fully assembled missile performs properly from disturbance on delivery by vehicles or naval vessels. We also have operated vibration tests by ground and naval transportation as well as shock tests by naval transportation before firing. The environmental tests have adopted Military Standard Specification and confirmed missile's reliability by performance tests, followed by missile's development. However, this significant testing which have meaning was dong by the missile's body and not with parts.

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서울시 일부 학교의 실내 공기질 조사 및 인식도 평가 (Assessment of Conscious Coginition Degree and Survey on the Indoor Air Quality at a public School in Seoul)

  • 손종렬;변상훈;김영환;김종혁;조윤수;이재영;박윤주
    • 환경위생공학
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    • 제18권3호통권49호
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    • pp.100-109
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    • 2003
  • Recently, Indoor air quality(IAQ) in workplace, residential environments and schools has been concern of people, scientists and related the public. And so in Seoul has recognized the healthy effect related to IAQ in schools. Therefore, the objective of this study reported in this article were to measure and compare the perception of IAQ of selected air pollutants at three different schools in Seoul. We performed a questionnaire survey of 400 students about their awareness for the importance of IAQ in our school. And we measured the IAQ of 3 schools considering as site region, construction year and studying level. The indoor air pollutants and parameters such as temperature, relative humidity, respirable particulate matter(PM10), formaldehyde(HCHO), total bacteria counts(TBC), carbon dioxide(CO$_2$), and noise were monitored in indoors. In results, all most response of occupant has recognized the awareness of IAQ at schools. The PMIO, TBC and Noise level of all schools were higher than the standard of the public 150 ${mu}$g/m$^3$ and 500CFU/m$^3$, the level formaldehyde(HCHO) was below 0.1 ppm of the healthy guideline of Korea And the concentration of CO$_2$ were investigated below 1,000 ppm of the standard implying ventilation in 2 schools except for 1 school(c school). Finally, the control of most important pollutants of IAQ in school were PM10, TBC and Noise. Therefore, it can be concluded that the indoor air quality of selected 3 schools studied was perceived as acceptable, it is recommended that the government related IAQ was suggested the guideline and control of IAQ problems in schools, and all member relating school need to be effort to reduce the exposure of sources to undesirable indoor pollutants such as Particlate and Noise.

국내소음지도 표준화를 위한 현황 평가 (Evaluation of Present Status for the Korean Noise Map Standardization)

  • 박인선;박상규
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 춘계학술대회논문집
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    • pp.517-520
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    • 2005
  • Noise mapping covers the whole mapping process from the collection of raw data, storage and retrieval of the data for computation/modeling, to the presentation of information related to outdoor sound levels, sound exposure, noise effects or numbers of affected person. This presentation can be in either a graphical or numerical form. In Europe, the Directive 2002/49/EC of the European Parliament and of the Council relating to the assessment and management of environmental noise is now being implemented in the EU Member States. Here, The first maps for major areas are required by mid 2007, and action plans required one year later. These activities are repeated at five yearly intervals and all defined areas are incorporated in the following round of deadlines starting in 2012. The above are minimum requirements and some countries are expected to go further and faster. In this study, present status of domestic and international noise maps has been introduced to implemente the Korean noise map standard. This will help to get more convenient and, more fair result, and produce correct map at domestic level.

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소음지도를 이용한 소음노출인구 산정방법별 비교 (A Comparison of Estimation Method for Population Exposed to Noise Using Noise Map)

  • 최성규;이병찬
    • 한국소음진동공학회논문집
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    • 제24권10호
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    • pp.802-808
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    • 2014
  • The purpose of this study is to suggest efficient methods for estimating population exposed to noises by analyzing differences of population exposed to noises estimated by each method through comparing exposed population estimated by utilizing existing methods and those estimated by using census output areas reflecting the actual population information of each address. For population exposed to noises, the error of exposed population estimated by using the per capita living space turned out to be the biggest, and other estimation methods had no significant difference. For population exposed to excess noises, as a result of analyzing population estimated by each method based on census output areas, the error of the method using a grid noise map turned out to be the biggest. For the method to estimate population exposed to noises by using a noise map, the estimation methods using census output areas and total ground area are considered to be more rational than the grid noise map estimation method or the method to estimate the living space per capita.

전력선 통신을 이용한 plant 감시 제어 시스템 (Spread Spectrum Method based Power Line Communication for Plant Monitoring and Control System)

  • 서민상;성석경;안병규
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1997년도 전력전자학술대회 논문집
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    • pp.211-215
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    • 1997
  • Localized communication networks for office automation, security monitoring, environmental management of buildings, computer communications, and other applications enjoy every increasing demand. This paper proposes a direct sequence spread spectrum communication system for use in power line data transmission. Advantages of power distribution circuits include reasonably universal coverage and easy access vis a standard wall plug. Disadvantages include limited communication bandwidth, relatively high noise levels, and varying levels of impedance, noise, and attenuation. Spread spectrum signalling provides immunity to narrow-band signal impairments and multiplexing capability. Our prototype power line communication module supports completely physical and data link layers based on the international standard ISO 10368 for reliable high-speed power line communication system. Moreover it provides useful functions to compose a plant monitoring and control system. All the circuits of the communication module are included in one compact circuit. Thus a functional communication system for the power line plant monitoring and control is implemented.

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성능 기준값 도출을 위한 재래식 도로절단기의 현장 절단성능 분석 (On-Site Cutting Performance Analysis of Conventional Pavement Cutter for Deriving Performance Standard Value)

  • 김균태
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2023년도 봄 학술논문 발표대회
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    • pp.243-244
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    • 2023
  • Noise, dust, etc. caused by road pavement cutting work, which frequently occurs in new construction or reconstruction of buildings, construction of complexes, etc., are environmental hazards and cause civil complaints. Recently, an eco-friendly pavement cutter is being developed to make the work low in noise and dust, however, the on-site cutting performance of the equipment has not been quantified. In this study, in order to derive a standard value for comparing the cutting performance of the eco-friendly cutter under development, a conventional pavement cutter was applied to four residential sites in Seoul and Gyeonggi-do, and the cutting data was collected. As a result of analyzing the collected data, the conventional pavement cutter showed a cutting performance of 12.3 to 20.2 sec/m, and the average was 27.2 sec/m. In the future, additional cutting experiments with various mixing ratios, materials, and depths are planned to confirm the performance of conventional pavement cutter in more detail.

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지하철 차내 소음 판별모형 개발에 관한 연구 - 서울시 지하철 5호선을 중심으로 - (The Development of Discriminant Models for Subway Inner Noise)

  • 김태호;도화용;원제무;윤상훈
    • 한국철도학회논문집
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    • 제10권6호
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    • pp.678-684
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    • 2007
  • 본 연구에서는 새로운 환경 문제로 인식되고 있는 지하철 운행시 차내소음 문제해결을 위해서 차내 소음에 영향을 미치는 요인들을 규명하였다. 또한 환경부 소음 규제 진동법 시행규칙에서 규정된 철도소음 규제값(70dB)을 기준으로 70dB이상, 이하의 두 집단으로 분류한 다음 측정된 359여개의 소음 및 기하구조, 운영요소 자료를 이용하여 소음규제 기준 및 심각도 기준에 대한 판별분석을 수행하였다. 그에 대한 결과 및 시사점은 다음과 같다. 첫째, 지하철 운행시 차내소음의 심각도를 판별할 때 기하구조에서는 궤도형태가, 운영요소에서는 속도가 영향을 미치는 것으로 나타났다. 따라서 향후 지하철 노선 건설 시에는 궤도형태에 대한 고려가 필요하며 건설 후 운영적인 부분에서도 적절한 속도유지에 대한 방안마련이 필요하다. 둘째, 본 연구에서 구축된 판별모형은 비교적 높은 예측률을 보여 향후 지하철에 대한 개선대안 수립 시 활용할 수 있다. 결론적으로 지하철 차내소음 심각도가 높을 경우 판별값이 소음의 규제기준을 최대한 넘지 않도록 기하구조 및 운영요소들에 대한 재조정이 필요하다. 본 연구의 판별모형은 소음 심각도에 대한 예측을 가능하게 하여 쾌적하고 안락한 지하철 환경을 만들어 줄 수 있는 기초자료로 활용될 수 있을 것이다.

교사환경기준에 관한 연구 (A Study on Environmental Standards of School Building)

  • 홍석표;박영수
    • 한국학교ㆍ지역보건교육학회지
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    • 제1권1호
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    • pp.11-43
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    • 2000
  • The purpose of this study was, through analyzing the previous researches, to grasp the present status of environment of school building(ESB), research the sundry records of each element and, through comparative analysis of the standard of ESB in Korea, the United States, and Japan, select the normative standard of ESB, to clarify the point at issue presented in Regulation of Construction & facility Management for Elementary and and Secondary School in Korea, and to suggest an alternative preliminary standard of ESB. To carry out a research for this purpose, these were required: 1. to investigate the existing present status of ESB, 2. to make a comparative analysis of the standard of ESB in each country, 3. to suggest the normative standard of preliminary standard of ESB, 4. to analyze the controversial points of the standard of ESB in Korea, 5. to suggest an alternative preliminary standard of ESB. The conclusions were as follows: 1. Putting, through analyzing the previous researches, the existing present status of ESB together, it seemed that lighting environment, indoor air environment and noise environment were all in poor conditions. 2. In the result of a comparative analysis of the standard of ESB in Korea, Japan and the United States, in Korea the factors of each lighting and indoor air environment were not presented properly, in Japan, in lighting environment aspect, the standard on natural lighting and the factors on brightness were not presented., and in the USA the essential factors of each environment were throughly presented. In the comparison of the standards on each factor, Korea showed that the standard level presented was less properly prescribed than those of the USA and Japan but it also showed that the standard levels prescribed in the USA and in Japan were mostly similar to the standard levels in records investigated. 3. With the result of the normative standard selection on School Builiding environment factor of prescribed in this study, the controversial points of the standard of ESB in Korea were analyzed and the result was utilized to suggest new preliminary standard of ESB. 4. As the result of the analysis of the controversial points of the standard of ESB in Korea, it was found that the standard of ESB in Korea should be established on a basis of School Health Act and be concretely presented in School Health Regulation and School Health Rule. The factors of each environment was improperly presented in the existing standard of ESB in Korea. Moreover the standard of them was inferior to that of the records investigated and those of in the USA and in Japan and it also showed that the standard of it in Korea was improper to maintain Comfortable Learning Environment. 5. A suggested preliminary standard of ESB acquired through above study as follows: 1) In this study a new kind of preliminary standard of ESB is divided into lighting environment, indoor air environment, noise environment, odor environment and for above classification, reasonable factor and standard should be established and the controling way on each standard and countermeasures against it should be considered. 2) In lighting environment, the factors of natural lighting are divided into daylight rate, brightness, glare. In the standard on each factor, daylight rate should secure 5% of a mean daylight rate and 2% of a minimum daylight rate, brightness ratio of maximum illumination to minimum illumination should be under 10:1, and in glare there should not be an occurrence factor from a reflector outside of the classroom. And the factors of unnatural lighting are illumination, brightness, and glare. In the standard on each factor, illumination should be 750 lux or more, brightness ratio should be under 3 to 1, and glare should not occur. And Optimal reflection rate(%) of Colors and Facilities of Classroom which influences lighting environment should be considered. 3) In indoor air environment factors, thermal factors are divided into (1) room temperature, (2) relative humidity, (3) room air movement, (4) radiation heat, and harmful gases (5) CO, (6) $CO_2$ that are proceeded from using the heating fuel such as oval briquettes, firewood, charcoal being used in most of the classroom, and finally (7) dust. In the standard on each factor, the next are necessary; room temperature: $16^{\circ}C{\sim}26^{\circ}C$(summer : $E.T18.9{\sim}23.8^{\circ}C$, winter: $E.T16.7{\sim}21.7^{\circ}C$), relative humidity: $30{\sim}80%$, room air movement: under 0.5m/sec, radiation heat: under $5^{\circ}C$ gap between dry-bulb temperature and wet-bulb temperature, below 1000 ppm of ca and below 10ppm of $CO_2$, dust: below 0.10 $mg/m^3$ of Volume of dust in indoor air, and ventilation standard($CO_2$) for purification of indoor air : once/6 min.(about 7 times/40 min.) in an airtight classroom. 4) In the standard on noise environment, noise level should be under 40 dB(A) and the noise measuring way and the countermeasures against it should be considered. 5) In the standard on odor environment, odor level under Physical Method should be under 2 degrees, and the inspecting way and the countermeasures against it should be considered.

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