http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
황석호 ( Seuk-ho Hwang ),박제철 ( Je-chul Park ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.4
In this study, the organic matter of effluents from sewage treatment plants, located in the Nakdong watershed was investigated. Regression equations were computed using treated sewage data to convert the chemical oxygen demand(COD) concentrations, which are mostly available from an open database, into total organic carbon(TOC) concentrations. The average concentration of organic matter in the sewage treatment plant effluents were 2.2 16.8 mg/L for COD and 3.4 14.3 mg/L for TOC. The concentrations of COD were positively correlated with the TOC concentrations. The correlation between COD and TOC was relatively high, at 0.865(p<0.01). Based on these results, regression analysis was conducted. The regression equation for TOC was 1.651×COD<sub>Mn</sub>-0.084 (R<sup>2</sup>=0.84). Furthermore, organic matter-related databases for more sewage treatment plants need to be built in order to establish TOC standards and manage the water quality.
현장타설형 건물 기초를 이용한 지중열 공조시스템의 성능평가에 관한 연구
황석호(SuckHo Hwang),남유진(Yujin Nam) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.9
Ground-source(Geothermal) heat pump(GSHP) systems can achieve a higher coefficient of performance than conventional air-source heat pump(ASHP) systems. However, GSHP systems are not widespread because of their expensive installation costs. The authors have developed a GSHP system that employs the cast-in-place concrete pile foundations of a building as heat exchangers in order to reduce the initial cost. In this system, eight U-tubes are arranged around the surface of a cast-in-place concrete pile foundation. The heat exchange capability of this system, subterranean temperature changes and heat pump performance were investigated in a full-scale experiment. As a result, the average values for heat rejection were 186~201 W/m(per pile, 25 W/m per pair of tubes) while cooling. The average COP of this system was 4.6 while cooling; rendering this system more effective in energy saving terms than the typical ASHP systems.
4,4`-Thiodibenzenethiol을 이용한 광경화형 에폭시 아크릴레이트 합성과 굴절률에 관한 연구
황석호(Seok Ho Hwang),백승석(Seung Suk Baek),이상원(Sang Won Lee) 한국고분자학회 2013 폴리머 Vol.37 No.1
4,4`-Thiodibenzenethiol을 기반으로 이관능 에폭시 수지인 4,4`-thiodibenzenethiol diglycidyl ether를 직접합성 법으로 합성하였다. 합성된 에폭시 수지가 광경화가 가능하도록 acrylic acid와 반응시켜 광경화형 고굴절 이관능 에 폭시 아크릴레이트인 4,4`-thiodibenzenethiol diglycidyl ether diacrylate를 합성하였으며 1H NMR과 FTIR을 이용하 여 화학구조를 확인하였다. 이관능 에폭시 아크릴레이트와 함께 반응성 희석제인 2-phenoxythiol ethyl acrylate를 5, 10, 15, 20, 30 wt% 희석하여 점도와 굴절률과의 상관관계를 확인하였으며 광경화 후 경화필름의 굴절률 변화를 고 찰 하였다. 반응성 희석제의 농도가 증가함에 따라 경화물의 경화도가 낮아졌으며, 경화도가 클수록 경화 후 굴절률 은 높아지는 경향을 확인하였다. UV-curable high refractive index di-functional epoxy acrylate, 4,4`-thiodibenzenethiol diglycidyl ether diacrylate, was synthesized from acrylic acid and 4,4`-thiodibenzenethiol diglycidyl ether that was obtained by reacting 4,4`- thiodibenzenethiol and epichlorohydrin using a direct method (Taffy process). Its chemical structure was identified by 1H NMR and FTIR. After its dilution with a reactive diluent, 2-phenoxythiol ethyl acrylate as 5, 10, 15, 20, and 30 wt% content, the relationship between their viscosity and refractive index was investigated. Their degree of cure decreased with increasing the amount of reactive diluent, and the refractive index of UV-cured film increased with increasing the degree of cure.
도시가스 사용량을 활용한 공동주택의 난방에너지 소비량 예측에 관한 연구
황석호(Hwang, Seok-Ho) 한국건축친환경설비학회 2016 한국건축친환경설비학회 논문집 Vol.10 No.4
The purpose of this paper is to predict heating energy consumption by using estimated balance point temperature and internal heat gain. To estimate balance point temperature and internal heat gain, variable heating degree day method and generalized reduced gradient method(GRG) using amount of city gas consumption of a apartment housing for 4 years are applied. As increasing internal heat gain due to solar heat gain, the balance point temperature is lowed. If U-value of building envelope(external wall and window) is reinforced by 2015 standard, average 59% of heating energy consumption is reduced. In particular, increasing internal heat gain, effect of heating energy saving is greater.
지표면 열평형방정식을 기반으로 한 지중온도 예측기법에 관한 연구
황석호(Hwang, Seok-Ho) 한국건축친환경설비학회 2017 한국건축친환경설비학회 논문집 Vol.11 No.2
The underground temperature distribution is important to design of geothermal system. Temperature is directly related to the energy resources in the ground and it influences the efficiency of geothermal system. Especially, low-depth ground temperature profile is critical parameter to design horizontal ground heat exchanger. In this paper, ground surface energy balance equation is modified function of surface temperature to calculate ground temperature. This model is based on a transient heat conduction differential equation with the energy balance at the soil surface as a boundary condition. The boundary condition involves both short and long wave radiation energy, convection and latent evaporation energy. To solve surface and ground temperature, Newton-Raphson iteration method and Crank-Nicholson implicit method are utilized, respectively. And, the accuracy of the prediction model was verified by comparing with the weather data(Pusan, 2015).