• 설비공학논문집
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• 제5권3호
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• pp.226-233
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• 1993

Thermosyphons are simple devices that can passively transport thermal energy over relatively large distance with little temperature degradation. Especially, the thermosyphon system requires no costly energy input and is completely maintenance free. These attributes permit the use of low grade thermal energy for thermal control of structures including the stabilization of highway foundations. This paper presents the experimental results of the snow melting system in which thermosyphon was utilized to ransfer the earth energy to the pavement to remove snow and ice. The test facility, three earth heated and one unheated test panels, is designed to investigate the variables associated with removing snow and ice from pavement surfaces. The results of these test show that the earth heated panel surface temperature is higher $2{\sim}6^{\circ}C$ than unheated panel when the ambient air temperature is $-7^{\circ}C$. The thermal performance of this earth source thermosyphon system for road heating showed that there was no snow on the heated test panels when the snowfall was 5cm average for the region.

• 대한토목학회논문집
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• 제32권6B호
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• pp.355-361
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• 2012

광동댐 유역은 융설에 의한 봄철 유출량 변화가 두드러지게 나타나는 유역으로서, 융설을 고려하지 않고 유출량을 산정할 경우 결과에 대한 신뢰성이 저하될 밖에 없다. 본 연구에서는 K-DRUM 모형에 융 적설 모듈을 포함하여 광동댐 유역을 대상으로 최근 4년간 봄철 유출량 모의를 수행하였다. 또한 융 적설 효과를 비교하기 위해 융 적설 모의기능이 적용되지 않은 경우와 적용한 경우의 결과를 비교하였다. 모의기간은 전년도 10월부터 해당연도 4월까지로 약 7개월간이고, 시단위 강우자료와 기상자료를 입력자료로 사용하였다. 유출량 모의 결과에 대한 모형의 성능을 평가하기 위하여 NSE, PBIAS, RSR 지수로 평가하였다. 신뢰성 평가 결과, 융 적설 모듈을 적용한 K-DRUM 모형은 봄철 융설에 의한 유출모의에 적용성이 우수한 것으로 나타났다.

• 대한산업공학회지
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• 제37권4호
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• pp.415-420
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• 2011

Snow removal system is named for machinery which manages roads for passing of pedestrians and automobiles when snow is piled up on the road. This paper studies configuration design of snow removal system that has several functions-melting snow in the street without moving it to other place, transferring snow to the melter and cleaning road by spraying water for cleaning road. These sorts of functions are analyzed by function decomposition method of Kirshman and Fadel and, based upon which, machine parts are selected. Layout design would follow functional design to testify if the selected component satisfies space which is allowed by constraints.

• 수산해양기술연구
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• 제44권4호
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• pp.362-369
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• 2008

The snow melting system by electric heating wires which is adopted in this research is a part of road facilities to keep surface temperature of the road higher than freezing point of water for melting the snow accumulated on it. The electric heating wires are buried under paved road at a certain depth and operated automatically and manually. Design theory, amount of heating, and installation standard vary according to economic situation, weather condition, installation place and each country applying the system. A main purpose of this study is figuring out the appropriate range of required heat capacity and installation depth and pitch for solving snowdrifts and freezing problems with minimum electric power consumption. This study was performed under the ambient air temperature($-2^{\circ}C$, $-5^{\circ}C$), the pitches of the electric heating wires(200 mm, 300 mm), heating value($250\;W/m^2$, $300\;W/m^2$, $350\;W/m^2$).

• 한국방재학회 논문집
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• 제10권3호
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• pp.45-52
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• 2010

기후변화와 교통의 관계는 크게 기후변화가 교통에 미치는 영향과 교통이 기후변화에 미치는 영향으로 나눌 수 있다. 본 연구에서는 전자의 관점에서 폭설이 도시교통에 미치는 영향을 파악하였으며, 통행자의 불편익에 대한 방안을 제시함으로 폭설에 대해 효과적으로 대처하고자 하였다. 예기치 못한 기후변화의 파급효과는 통행시간과 운행비용, 사고비용 등으로 분석되었으며, 이를 기반으로 해당구간의 융설시스템(Snow Melting System) 도입에 따른 사업의 효과성을 분석하였다. 본 연구의 결과는 기후변화로 인한 교통불편익을 최소화하는 방재시설물 설치를 위한 평가기준으로 적용될 수 있을 것이다.

• 한국지형학회지
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• 제19권2호
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• pp.187-195
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• 2012

일본 홋카이도의 다이세츠산 국립공원은 지형 조건상 삼림한계를 넘는 고산대가 광범위하며, 지표지질은 침식에 취약한 화산쇄설물로 이루어져 있다. 또한 등산 성수기와 융설기가 시기적으로 겹치므로 답압, 융설수, 서릿발에 의한 토양침식이 등산로를 따라 활발하게 일어난다. 특히 융설수에 의한 노면 세굴과 서릿발에 의한 측벽 후퇴가 결합하여 등산로 단면이 크게 확대될 수 있으며, 세굴로 인하여 걷기 불편해진 등산로를 벗어나 걸음으로써 노면분기도 빈번하게 일어난다. 비탈면 구간에서 발생한 토사는 등산로 아래쪽으로 흘러내려와 노면뿐 아니라 주변 초지까지 매몰시키며 2차적인 훼손을 일으키고 있다.

• 한국도로학회논문집
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• 제15권2호
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• pp.19-27
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• 2013

PURPOSES : This study aims to investigate the snow-melt effects of an underground electric heater's snow-melt system via a field performance test, for evaluating the suitability of the system for use on a concrete pavement. The study also investigates the effectiveness of dynamic measures for clearing snow after snowfall events. METHODS : In order to check the field applicability, in November 2010, specimens were prepared from materials used for constructing concrete pavements, and underground electric heating meshes (HOT-mesh) were buried at depths of 50 mm and 100 mm at the site of the Incheon International Airport Construction Research Institute. Further, an automatic heating control system, including a motion sensor and pavement-temperature-controlled sensor, were installed at the site; the former sensor was intended for determining snow-melt effects of the heating control system for different snowfall intensities. Pavement snow-melt effects on snowy days from December 2010 to January 2011 were examined by managing the electric heating meshes and the heating control system. In addition, data on pavement temperature changes resulting from the use of the heating meshes and heating control system and on the dependence of the correlation between the outdoor air temperature and the time taken for the required temperature rise on the depth of the heating meshes were collected and analyzed. RESULTS : The effects of the heating control system's preheat temperature and the hot meshes buried at depths of 50 mm and 100 mm on the melting of snow for snowfalls of different intensities have been verified. From the study of the time taken for the specimen's surface temperature to increase from the preheat temperature ($0^{\circ}C$) to the reference temperature ($5{\sim}8^{\circ}C$) for different snowfall intensities, the correlation between the burial depth and outdoor air temperature has been determined to be as follows: Time=15.10+1.141Depth-6.465Temp CONCLUSIONS : The following measures are suggested. For the effective use of the electric heating mesh, it should be located under a slab it may be put to practical use by positioning it under a slab. From the management aspect, the heating control system should be adjusted according to weather conditions, that is, the snowfall intensity.

• 한국지하수토양환경학회지:지하수토양환경
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• 제16권5호
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• pp.82-89
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• 2011

Understanding snowmelt movement to the watershed is crucial for both climate change and hydrological studies because the snowmelt is a significant component of groundwater and surface runoff in temperature area. In this work, a new energy balance budget algorithm has been developed for melting snow from a snowpack at the Central Sierra Snow Laboratory (CSSL) in California, US. Using two sets of experiments, artificial rain-on-snow experiments and observations of diel variations, carried out in the winter of 2002 and 2003, we investigate how to calculate the amount of snowmelt from the snowpack using radiation energy and air temperature. To address the effect of air temperature, we calculate the integrated daily solar radiation energy input, and the integrated discharge of snowmelt under the snowpack and the energy required to generate such an amount of meltwater. The difference between the two is the excess (or deficit) energy input and we compare this energy to the average daily temperature. The resulting empirical relationship is used to calculate the instantaneous snowmelt rate in the model used by Lee et al. (2008a; 2010), in addition to the net-short radiation. If for a given 10 minute interval, the energy obtained by the melt calculation is negative, then no melt is generated. The input energy from the sun is considered to be used to increase the temperature of the snowpack. Positive energy is used for melting snow for the 10-minute interval. Using this energy budget algorithm, we optimize the intrinsic permeability of the snowpack for the two sets of experiments using one-dimensional water percolation model, which are $52.5{\times}10^{-10}m^2$ and $75{\times}10^{-10}m^2$ for the artificial rain-on-snow experiments and observations of diel variation, respectively.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회(2)
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• pp.1086-1087
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• 2005

• 한국과학기술학회:학술대회논문집
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• 한국과학기술학회 2005년도 동계 학술대회
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• pp.1-9
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• 2005