2010/2011년도 한국 발생 구제역 확산에 관한 연구

황지현,오창혁,Hwang, Jihyun,Oh, Changhyuck 한국데이터정보과학회 2014 한국데이터정보과학회지 Vol.25 No.2

구제역은 전염성이 높고 치명적 결과를 유발하는 우제류 전염병이며, 2010/2011년도에 국내에서 발생한 구제역 (2010/2011 구제역)은 사회 및 경제적으로 국가에 재난 수준의 손실을 끼쳤다. 따라서 국가적 차원에서 구제역의 예방과, 발병 시 피해를 줄이려는 많은 노력을 하고 있다. 이러한 노력의 하나로 구제역의 전염 현상을 확률적으로 모형화하고 이해하려는 노력이 필요하다. 영국에서 발생한 2001년 구제역은 그 규모와 피해가 막대하여, 영국에서는 다양한 확률적 모형으로 구제역 전파 현상에 대한 이해를 통하여 미래의 발생에 대비하려는 연구가 이루어져 왔다. 그러나 2010/2011 구제역에 대하여는 확률적 모형을 활용한 연구가 미미한 편이다. 따라서 본 연구에서는 2010/2011 구제역에 대하여 시간-공간 확률 SIR 확률모형을 가정하고 시간과 공간에 따르는 전파 현상에 대하여 고찰한다. 농림수산검역검사본부에서 발표한 구제역 감염데이터와 통계청의 전국농가센서스 자료의 일부인 전체 우제류 농가의 데이터가 본 연구의 분석에 필요한 정도로 상세하지 않으므로 추정 및 보정작업을 통하여 데이터를 보완하였다. 감염데이터를 이용하여 커널함수를 추정하고, 전국 우제류 농장데이터를 이용하여 시뮬레이션을 통하여 모형의 모수를 추정하였다. Foot-and-mouth Disease (FMD) is a highly infectious and fatal viral livestock disease that affects cloven-hoofed animals domestic and wild and the FMD outbreak in Korea in 2010/2011 was a disastrous incident for the country and the economy. Thus, efforts at the national level are put to prevent foot-and-mouth disease and to reduce the damage in the case of outbreak. As one of these efforts, it is useful to study the spread of the disease by using probabilistic model. In fact, after the FMD epidemic in the UK occurred in 2001, many studies have been carried on the spread of the disease using a variety of stochastic models as an effort to prepare future outbreak of FMD. However, for the FMD outbreak in Korea occurred in 2010/2011, there are few study by utilizing probabilistic model. This paper assumes a stochastic spatial-temporal susceptible-infectious-removed (SIR) epidemic model for the 2010/2011 FMD outbreak to understand spread of the disease. Since data on infections of FMD disease during 2010/2011 outbreak of Aniaml and Plant Quarantine Agency and on the livestock farms from the nationwide census in 2011 of Statistics Korea do not have detail informations on address or missing values, we generate detail information on address by randomly allocating farms within corresponding Si/Gun area. The kernel function is estimated using the infection data and by using simulations, the susceptibility and transmission of the spatial-temporal stochastic SIR models are determined.

저비용, 고성능 건물에너지관리시스템(BEMS) 운영관리 알고리즘 개발

황지현(Jihyun Hwang),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11

For the purpose of wide spread of economical building energy management system(BEMS) field test of the starting product based on the new developed open type operating system was tried. The K-laboratory in Hwa-seong City, Gyeonggi province was selected as the demonstration site. Based on the open operating system, BEMS, which can be easily applied to anyone, was introduced as an example by allowing data collection and monitoring of control points for building energy analysis without additional costs, except for sensor purchase and installation costs. The results of building energy data operation collected through BEMS Checker and Score, a service module for analyzing and diagnosing BEMS, were analyzed, and the service module algorithm was applied to derive the results of saving about 20% of building energy in 2019 compared to 2017. In conclusion, By applying the building energy consumption analysis, management, diagnosis, integrated control system, and facility performance analysis service module to the actual site, managers can efficiently utilize it and implement an economically excellent system.

전산실 외기냉방 도입방안 및 경제성 분석 연구

황지현(JiHyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.11

Recently electric power consumption at data center has been increasing very steeply with the rapid spread of internet network and a fast evolution of information and communication technologies. Outdoor air cooling system could be used for cooling the indoor space with relatively cold outdoor air which led to save cooling energy and cost. It was considered in this study how the outdoor air cooling system could be introduced to minimize the cooling energy in the typical data center. It was analyzed BEMS data for one year from the outdoor air cooling system installed at the domestic data center. And it was to verify the economic effect. When you raise the indoor temperature setting 1 ℃, confirmed that the annual energy savings of approximately 5%.

에어컨 콤프레셔 제어가 자동차 실내 온도에 미치는 영향에 관한 연구

황지현(Jihyun Hwang),정찬세(Chanse Jeong),양순용(Soonyong Yang) 한국자동차공학회 2013 한국자동차공학회 지부 학술대회 논문집 Vol.2013 No.11

A automotive technology has been develop many kind of automotive field. Especially, HVAC system is most important system for occupants comfort. But the temperature of cabin inside different 1st line and 2nd line. In this paper described the measurement system for cabin inside temperature and the control system of air conditioning compressor using relay. Finally, analysis the effect of cabin inside temperature following air conditioning compressor control.

건물에너지관리시스템(BEMS) 현장적용 및 보급 확대방안 검토

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-

For the purpose of wide spread of economical building energy management system(BEMS), field test of the prototype based on the new developed open type operating system was carried our. The K-laboratory in Hwa-seong City, Gyeonggi province was selected as the demonstration site. We selected optimal monitoring and control points, 115 points for electric power field and 61 points for machinery and renewable energy field, to minimize investment cost. Thanks to the open type operating system, BEMS can be easily applied and operated by anyone ignorant of Information and communication technology. As results various analyses were performed with field date collected for last two years using this system. For experimental and miscellaneous purposes, energy consumption was increased by 12.4% and 6.5% respectively, while the figure was decreased 12%, 5.6% and 1.4% respectively, for air-conditioning, business and commercial applications. Based on these basic findings, we’re going to develop various service modules for building equipments and systems, for example building energy consumption and performance analysis, fault detection and diagnosis, efficient operation and management and integrated control and so on.

건물에너지관리시스템(BEMS) 현장 적용을 통한 효과 분석 연구

황지현(Jihyun Hwang),이태원(Taewon Lee) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6

Building Energy Management System(BEMS) can be summarized as two requirements: installation cost reduction and effective function. However, there is no systematic analysis of the effects of BEMS in Korea and abroad. In particular, it is uncommon to see the savings on various energy consumption factors and analysis results based on long-term measurement data. In this study, the energy saving effects were summarized, analyzed from the energy consumption information obtained from the application and operation of BEMS. The testing site was composed of 25 buildings of located in Ilsan complex of Korea Institute of Civil engineering and building Technology(KICT). The test period was five years from 2013 to 2017. We applied various energy saving techniques through analysis of energy consumption and consumption rate by buildings and usage. As a result, over 23% of electric power could be saved in this site. However, the effect obtained through this study was obtained through the analysis and the reduction technique introduced by the effort of research team, so it was considered that the development of the algorithm and software in order to get satisfactory effects applied to the building site was urgent.

BEMS 구축 현장의 전력소비량 및 절감효과 분석

황지현(Jihyun Hwang),정이랑(Erang Jeong),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.11

The interests on the Building Energy Management System(BEMS) can be summarized as two requirements, installation cost reduction and effective function. However, there is few systematic analyses on the effects of BEMS. In particular, it is uncommon to see the savings on various energy consumption factors and analyses results based on long-term measurement data. In this study, the energy saving forecast effects were summarized and analyzed from the energy consumption information obtained from the operation data with BEMS. The test site was composed of 8 buildings in Hwaseong campus of Korea Institute of Civil engineering and building Technology(KICT). The test period was one years from 2016 to 2017. Over 12 percent of electric power consumption was saved simply through the improvement of consciousness of residents from June 2016. It was also expected to reduce electric power consumption about 2% by changing control method of the dust collector and about 15% per year by changing the operation method of air conditioning system in the computer room. Additional energy saving over 5% was expected possible through the reasonable adjustment and optimal operation of the building air-conditioning system.

태양열원 · 지열원 복합냉난방시스템 현장적용 및 경제성 분석 연구

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6

Solar heat and geothermal heat are new and renewable energy sources that can significantly contribute to achieving zero-energy building mandates and reducing energy consumption in the building sector. In the case of the geothermal heat pump system, there is a problem in that the heating performance is deteriorated due to the drop in the underground temperature due to the imbalance of heating and cooling loads in domestic climatic conditions. The purpose of this study is to improve the long-term performance degradation of the geothermal heat pump system due to the imbalance in the cooling and heating load in Korea. To improve the primary side performance of the geothermal heat source heat pump through the solar heat source, we will examine the design plan of the solar heat source and geothermal heat source combined cooling and heating system. Also, It is can reduce the power consumption of the geothermal heat exchanger and the circulation pump of the underground heat exchanger. An empirical experiment was conducted on a medium-sized office building to evaluate the performance of the solar and geothermal heat and cooling system. As a result, the primary side performance improvement effect of the geothermal heat pump through the solar heat source was confirmed. In addition, it was tested that the power consumption of the geothermal heat pump could be reduced by about 15% by operating the solar heat source and the geothermal source.

태양열원 연계 지열원 히트펌프시스템의 최적 설계 및 운전 방안에 대한 연구

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6

carbon neutrality, “ZEB certification” and “mandatory installation of renewable energy systems” have ensured the inevitable introduction of renewable energy along with insulation and high-efficiency equipment systems for a reduction in building energy. Meanwhile, studies have been conducted on the use of various alternative renewable energy sources, such as sunlight, solar heat, ground heat, and fuel cells; however, it remains extremely difficult to apply them to the building sector, except for sunlight and solar heat energies, owing to regional restrictions. In the case of the geothermal source heat pump system, there is a problem of lowering heating performance due to a drop in underground temperature due to an imbalance in heating and cooling loads in domestic climate conditions. Therefore, the solar power system was selected as an auxiliary heat source to supplement the insufficient heat source during the heating period, and previous studies confirmed that the power consumption of the heat pump and the underground heat exchanger circulation pump can be reduced by improving the thermal environment of the heat source. However, since the solar power system requires a lot of initial investment costs, it is important to produce the optimal effect with the geothermal power heat pump system through efficient design and operation. Therefore, in this study, an analysis model was established based on the relational expression of the elements constituting the system for the optimal design and operation of the geothermal source heat pump system linked to solar sources, and a numerical analysis tool was prepared. The optimal design and operation conditions were derived through various parameter studies by analyzing the effect of system switching temperature from geothermal source to solar source through various numerical experiments. As a result of applying it to the target building, it was shown that it was possible to reduce power consumption by 25% compared to the case of using only a geothermal source.

태양열원 연계 지열원 히트펌프시스템의 최적 설계 및 운전 방안에 대한 연구

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6

carbon neutrality, “ZEB certification” and “mandatory installation of renewable energy systems” have ensured the inevitable introduction of renewable energy along with insulation and high-efficiency equipment systems for a reduction in building energy. Meanwhile, studies have been conducted on the use of various alternative renewable energy sources, such as sunlight, solar heat, ground heat, and fuel cells; however, it remains extremely difficult to apply them to the building sector, except for sunlight and solar heat energies, owing to regional restrictions. In the case of the geothermal source heat pump system, there is a problem of lowering heating performance due to a drop in underground temperature due to an imbalance in heating and cooling loads in domestic climate conditions. Therefore, the solar power system was selected as an auxiliary heat source to supplement the insufficient heat source during the heating period, and previous studies confirmed that the power consumption of the heat pump and the underground heat exchanger circulation pump can be reduced by improving the thermal environment of the heat source. However, since the solar power system requires a lot of initial investment costs, it is important to produce the optimal effect with the geothermal power heat pump system through efficient design and operation. Therefore, in this study, an analysis model was established based on the relational expression of the elements constituting the system for the optimal design and operation of the geothermal source heat pump system linked to solar sources, and a numerical analysis tool was prepared. The optimal design and operation conditions were derived through various parameter studies by analyzing the effect of system switching temperature from geothermal source to solar source through various numerical experiments. As a result of applying it to the target building, it was shown that it was possible to reduce power consumption by 25% compared to the case of using only a geothermal source.