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한국조경학회 / v.34, no.1, 2006년, pp.21-36 
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투.보수성 시멘트 콘크리트 포장의 열물성 및 수분보유특성이 표면온도에 미치는 영향
( Effects of Thermal Properties and Water Retention Characteristics of Permeable Concrete Pavement on Surface Temperature ) |
| 류남형;유병림; 진주산업대학교 조경학과;서울대학교 환경대학원;
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| 초 록 |
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| This study was undertaken to analyze the effects of pavement thermal properties and water retention characteristics on the surface temperature of the gray permeable cement concrete pavement during the summer. Following is a summary of major results. 1) The hourly surface temperature of pavement could be well predicted with a heat transfer model program that incorporated the input data of major meteorological variables including solar radiation, atmospheric temperature, dew point, wind velocity, cloudiness and the evaporation rate of the pavements predicted by the time domain reflectometry (TDR) method. 2) When the albedo was changed to 0.5 from an arbitrary starting condition of 0.3, holding other variables constant, the peak surface temperature of the pavement dropped by 11.5%. When heat capacity was changed to $2.5;kJm^{-3}K^{-1};from;1.5;kJm^{-3}K^{-1}$, surface temperature dropped by 8.0%. When daily evaporation was changed to 1 mm from 2 mm, temperature dropped by 5.7%. When heat conductivity was changed to $2.5;Wm^{-1}K^{-1};from;1.5;Wm^{-1}K^{-1}$, the peak surface temperature of the pavement fell by 1.2%. The peak pavement surface temperature under the arbitrary basic condition was $24.46^{circ}C$ (12 a.m.). 3) It accordingly became evident that the pavement surface temperature can be most effectively lowered by using materials with a high albedo, a high heat capacity or a high evaporation at the pavement surface. The glare situation, however, is intensified by raising of the albedo, moreover if reflected light is absorbed into surrounding physical masses, it is changed into heat. It accordingly became evident that raising the heat capacity and the evaporative capacity may be the moot acceptable measures to improve the thermal characteristics of the pavement. 4) The sensitivity of the surface temperature to major meteorological variables was as follows. When the daily average temperature changed to $0^{circ}C;from;15^{circ}C$, holding all other variables constant, the peak surface temperature of the pavement decreased by 56.1 %. When the global solar radiation changed to $200;Wm^{-2};from;600;Wm^{-2}$, the temperature of the pavement decreased by 23.4%. When the wind velocity changed to $8;ms^{-1};from;4;ms^{-1}$, the temperature decreased by 1.4%. When the cloudiness level changed to 1.0 from 0.5, the peak surface temperature decreased by 0.7%. The peak pavement surface temperature under the arbitrary basic conditions was $24.46^{circ}C$ (12 a.m.) |
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| 키워드 |
| Pavement Surface Temperature Prediction Model;Sensitivity Analysis;Albedo;Heat Capacity;Daily Evaporation;Meteorological Variables; |
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한국조경학회지 / v.34, no.1, 2006년, pp.21-36
한국조경학회
ISSN : 1225-1755
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200624717941812)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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