• Title/Summary/Keyword: Heat Island Effects

검색결과 119건 처리시간 0.025초

지열히트펌프의 도심 열섬 저감 효과의 검토 (Effect of the Geothermal Heat-pump on alleviation of the Urban Heat Island)

  • 손원득
    • 한국태양에너지학회 논문집
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    • 제36권3호
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    • pp.45-52
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    • 2016
  • Remarkable air temperature increases in urban areas are known as heat island phenomenon. In this study, we analyzed the effects of renewable energy on the heat island phenomenon in urban area by numerical method. The results showed that the use of renewable energy reduces the building energy use in urban area and contributes the alleviation of the Urban Heat Island Effects.

신재생에너지 사용이 도시열섬방지에 미치는 영향에 대한 연구 (A Study on the Effects of prevention of the Urban Heat Island by Using New & Renewable Energy)

  • 손원득;최영식
    • 한국산업융합학회 논문집
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    • 제12권3호
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    • pp.157-162
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    • 2009
  • Significant air temperature increases in urban areas are known as the heat island phenomenon in a global scale. Therefore, we use numerical model in order to analyze quantitative effects by using new & renewable energy on the heat island phenomenon in urban area. The present study quantitatively analyzes the Urban Heat Island Effects, Energy-Saving Effects, and Environmental Load Decrease Effect along New and Renewable Energy Application which is 10% of the Building Energy Consumption.

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신재생에너지 적용이 도시열섬방지에 미치는 기여도 분석 (A Study on Quantitative Estimation for prevention of Heat Island by Using New & Renewable Energy)

  • 손원득;박정한;박경순
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2009년도 하계학술발표대회 논문집
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    • pp.508-513
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    • 2009
  • Significant air temperature increases in urban areas are known as the heat island phenomenon in a global scale. Therefore, we use numerical model in order to analyze quantitative effects by using new & renewable energy on the heat island phenomenon in urban area. The present study quantitatively analyzes the Urban Heat Island Effects, Energy-Saving Effects, and Environmental Load Decrease Effect along New and Renewable Energy Application which is 10% of the Building Energy Consumption.

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도심지의 온열성상에 관한 연구 - 공조배열량의 감소에 따른 도심지 온열환경의 변화 - (Study on Thermal Property in Urban Area - Quantitative Estimation of Heat Island in Urban area using the Simple Urban Canopy Model -)

  • 손원득;이성
    • 설비공학논문집
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    • 제16권12호
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    • pp.1190-1196
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    • 2004
  • Significant air temperature increases in urban areas are known as the heat island phenomenon in a global scale. Therefore, we propose numerical model in order to analyze quantitative effects of building environmental factors on the heat island phenomenon in urban area. In this paper, we propose a predicting model to analyze the heat island phenomenon quantitatively. Using this model, numerical simulation is performed in order to analyze quantitative effects of many factor on the heat island phenomenon.

통합모델을 활용한 이류와 도시비율이 서울 수도권 지역의 도시열섬강도에 미치는 영향 분석 (Analysis of the Effects of Advection and Urban Fraction on Urban Heat Island Intensity using Unified Model for Seoul Metropolitan Area, Korea)

  • 홍선옥;김도형;변재영;박향숙;하종철
    • 대기
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    • 제29권4호
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    • pp.381-390
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    • 2019
  • This study investigates the impacts of urban land-use fraction and temperature advection on the urban heat island intensity over the Seoul metropolitan area using the UM (Unified Model) with the MORUSES (Met Office Reading Urban Surface Exchange Scheme) during the heat wave over the region from 2 to 8, August 2016. Two simulations are performed with two different land-use type, the urban (urban simulation) and the urban surfaces replaced with grass (rural simulation), in order to calculate the urban heat island intensity defined as the 1.5-m temperature difference between the urban and the rural simulations. The land-use type for the urban simulation is obtained from Korea Ministry of Environment (2007) land-use data after it is converted into the types used in the UM. It is found that the urban heat island intensity over high urban-fraction regions in the metropolitan area is as large as 1℃ in daytime and 3.2℃ in nighttime, i.e., the effects of urban heat island is much larger for night than day. It is also found that the magnitude of urban heat island intensity increases linearly with urban land-use fraction. Spatially, the estimated the urban heat island intensities are systematically larger in the downwind regions of the metropolitan area than in the upwind area due to the effects of temperature advection. Results of this study indicate that urban surface fraction in the city area and temperature advection play a key role in determining the spatial distribution and magnitude of urban heat island intensity.

Mapping and Analyzing the Park Cooling Intensity in Mitigation of Urban Heat Island Effect in Lahore, Pakistan

  • Hanif, Aysha;Nasar-u-Minallah, Muhammad;Zia, Sahar;Ashraf, Iqra
    • 대한원격탐사학회지
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    • 제38권1호
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    • pp.127-137
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    • 2022
  • Urban Heat Island (UHI) effect has been widely studied as a global concern of the 21st century. Heat generation from urban built-up structures and anthropogenic heat sources are the main factors to create UHIs. Unfortunately, both factors are expanding rapidly in Lahore and accelerating UHI effects. The effects of UHI are expanding with the expansion of impermeable surfaces towards urban green areas. Therefore, this study was arranged to analyze the role of urban cooling intensity in reducing urban heat island effects. For this purpose, 15 parks were selected to analyze their effects on the land surface temperature (LST) of Lahore. The study obtained two images of Landsat-8 based on seasons: the first of June-2018 for summer and the second of November-2018 for winter. The LST of the study area was calculated using the radiative transfer equation (RTE) method. The results show that the theme parks have the largest cooling effect while the linear parks have the lowest. The mean park LST and PCI of the samples are also positively correlated with the fractional vegetation cover (FVC) and normalized difference water index (NDWI). So, it is concluded that urban parks play a positive role in reducing and mitigating LST and UHI effects. Therefore, it is suggested that the increase of vegetation cover should be used to develop impervious surfaces and sustainable landscape planning.

도시열섬 현상에 의한 기온차이가 흰줄숲모기(Aedes albopictus) 부화율에 미치는 영향 (The Impact of Urban Heat Island-induced Temperature Differences on the Hatching Rates of Aedes albopictus)

  • 류지훈;최광식
    • 한국응용곤충학회지
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    • 제63권1호
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    • pp.77-80
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    • 2024
  • 한국에서 흰줄숲모기(Aedes albopictus)는 일반적으로 매우 흔한 종으로 여기지지만, 해외에서는 주요 질병 매개체로 인식되고 있으며, 도시 환경에 잘 적응하는 특징을 가지고 있다. 최근 도심 지역의 기후변화와 열섬 현상에 따른 곤충의 대발생이 보고되면서, 이러한 환경 변화가 모기의 부화율에 미치는 영향에 대한 연구의 필요성이 증가하고 있다. 본 연구를 위해 서울시 내 25개의 기상청 자동관측장비(AWS)에서 수집된 기후 데이터를 분석하여, 열섬 현상이 강한 도심 지역과 열섬 현상이 약한 교외 지역을 선정하였으며, 이를 통해 임의의 사이구간을 생성하여 총 9개의 열섬 조건에서 흰줄숲모기의 부화율을 분석하였다. 분석 결과, 열섬 현상이 강할수록 부화율이 증가하였으며, 회귀분석을 통해 열섬 강도가 높아질수록 이러한 추세가 더욱 빨라질 수 있음을 확인하였다. 이러한 연구 결과는 도시열섬 현상에 따른 기온 변화가 흰줄숲모기의 부화율에 중요한 영향을 미칠 수 있음을 시사한다.

A Preliminary Analysis of the Impact of Urban Green Spaces on the Urban Heat Island Effect Using a Temperature Map

  • Myeong, Soo-Jeong
    • 대한원격탐사학회지
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    • 제26권6호
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    • pp.675-680
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    • 2010
  • Temperature is one of the main issues in climate change, and the urban heat island effect in highly developed urban areas is an important issue that we need to deal with. This study analyzed the extent of the cooling effects of urban green spaces. The study used a surface temperature map of Seoul. It found that the cooling effects of green space was observed within limited distances, although it varied a little depending on the parks investigated. The cooling effect distance ranged from 240m to 360m, averaging about 300m. It also found the size of an urban green space does not make much difference in cooling the surrounding areas. Although further investigation with diverse urban areas should be conducted on this matter, the results did imply that many small green spaces in the neighborhood are more effective than a single big green space in mitigating the heat island effects of cities.

도시 지표면 온도분포 특성 및 열섬완화방안 (A Study on the Distribution Characteristic of Urban Surface Temperature and Urban Heat Island Effects)

  • 도후조;이정민;나정화
    • 한국환경과학회지
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    • 제16권5호
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    • pp.611-622
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    • 2007
  • The purpose of this research was to three-criteria landuse-pattern, developing density, NDVI which were related to the heat island and find the distribution characteristic of urban surface temperature and urban heat island effects. The results of this study were as follows. According to the analysis of surface temperatures, the first grade was the outside-city like a mountain and its temperature was less than $12.18^{\circ}C$. The fifth grade was the downtown industrial area and its temperature was more than $23.54^{\circ}C$. It means Daegu-Metropolitan-City has the serious heat-island effect. the results of landuse pattern analysis, in case of fifth and forth grade, city area was occupied over 90% with residential, commercial and industrial areas, but in case of third grade, openspace was occupied over 70%. The results of developing density analysis, the temperature had high correlation with building ratio, road ratio, vegetation ratio and etc. To plan for the decrease of heat island effect needed the extension of green space, decrease of paving, but there was a limit to get the objective method for grade classification because of lacking in the basic data, the research of criteria will be accomplished continuously.

도시가로공간의 공공디자인 개선사업에 따른 열환경 개선 효과 평가 (Evaluation of Thermal Environment Improvement Effect from Public Design Improvement Project on the Urban Street Space)

  • 백상훈;시미즈아키;김학윤;정응호
    • 한국환경과학회지
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    • 제20권9호
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    • pp.1105-1114
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    • 2011
  • In this study, thermal environment improvements throughout public design improvement project on the urban street space were compared and evaluated. Thermo-Render 3.0, 3D-CAD based thermal environment simulation program, had been used for thermal environment improvement evaluations. Followings are the results. First, clayey blocks which have low heat transfer rate and cool island effect by trees and roof gardens brought cooling effects for buildings and surface of streets. Seconds, MRT values showed low levels because of low radiant mulching materials. Thirds, roof gardens contributed to reduce heat island effect since HIP levels were affected by decreasing heat storage effect of buildings from roof gardens. As a result, reducing heat storage effect throughout selecting and arranging proper materials which would not increase heat island potentials should be performed to improve heat island effects.