• Environmental and Resource Economics Review
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• v.24 no.3
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• pp.463-488
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• 2015

A more detailed design of offset system is needed according to the emission trading system started in 2015. This study aims to estimate the supply of potential offset that can be secured by expanding high-efficiency household electric appliances. The target commodities for analysis are three different householding electric appliances: TV, washing machine, electric fan, refrigerator and air conditioner. By using the ARDL model, we estimated the coefficients of diffusion of these high-efficiency appliances from 2016 to 2022. Then, the potential supply of offset was drawn by calculating the amount of electricity saving by efficiency improvement and by applying the rates of carbon exchange. Supposing that the electricity savings rates of high-efficiency appliances are each 10% and 20%, the accumulated carbon decrement in 2022 was respectively $361,899CO_2t$ and $723,797CO_2t$. The appliance that showed the biggest carbon decrement was air conditioner, and the second biggest was refrigerator and the next was TV, followed by washing machine, electric fan.

• Tunnel and Underground Space
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• v.28 no.6
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• pp.609-619
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• 2018

This study was carried out at a local limestone mine to analyze the ventilation efficiency of the shaft equipped with a main fan. The results show that its ventilation efficiency is clearly verified for the natural as well as the mechanical ventilation. The airflow rate of $11.7m^3/s$ was induced by the natural ventilation force and the maximum quantity is almost same as the airflow rate estimated by monitoring the average temperatures in the upcast and downcast air columns. Meanwhile, the airflow rate exhausted by the main fan through the shaft was $20.3{\sim}24.8m^3/s$; variation of the quantity was caused by the upward shift of the mine ventilation characteristic curve due to the frequent movement of the equipment. This indicates efforts are required to reduce the ventilation resistance and raise the quantity supplied by the main fan. The turbulent diffusion coefficients along the 1912 m long airway from the portal to the shaft bottom was estimated to be $15m^2/s$ and $18m^2/s$. Since these higher coefficients imply that contaminants will be dispersed at a faster velocity than the airflow, prompt exhaust method should be planned for the effective air quality control. The ventilation shaft and main fan are definitely what local limestone mines inevitably need for better working environment and sustainable development.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.5
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• pp.99-105
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• 2007

This paper describes the investigation on the spot in relation to electrical safety of electrical installation in elementary middle high school. The investigation was carried out for power receiving system, classroom, chemistry room, music hall and so on. The investigation on the spot was performed by researcher, the related expert, engineer with over fifteen years of industry experience all over the country. As a result of investigation on the spot to 41 schools, common grounding methods at power receiving system were dominant. The risk factors include absence of control box of electric fan, non-installation of earth leakage circuit breaker to power source of experiment stand, use of non-grounding outlet.

• Journal of KIISE:Computer Systems and Theory
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• v.27 no.8
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• pp.701-709
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• 2000

Real world wind can be classified into two categories: natural wind and artificial wind. Artificial wind can be generated by human beings, air conditioners, electric fans, etc. In this paper, a model for artificial wind is presented. We also present methods to efficiently calculate the forces applied to the objects under influence of the artificial wind. Our model is designed for real-time applications such as virtual environments. A general wind generating system can be established through integrating our model with previous wind models those are concentrated on the natural wind generation.

• Journal of the Korean Society of Safety
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• v.29 no.3
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• pp.20-27
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• 2014

Cooling equipment is the frequent occurrence of fire despite the absence of the heating element. National fire statistics in 2013 show that a total of 263 fires occurred in the cooling equipment and the number of electric fan has 145 fire cases. This is accounted for 55.1% of the whole. Electric fan is the electrical appliance that the heat is generated on the winding wire and the iron core. If such characteristic is not controled properly, fire would break out at the electric fan. also there is a gap filled with an insulator between connection terminals of the capacitor in the electric fan. But in case that the gap on the capacitor is covered with some conductive material such as dust, there would be a fire as well caused by electrical heating locally. Although many studies related with those have been conducted, electric fan fire is continuously occurred. In this study, thermal characteristics and current signal in various conditions such as the heat generation of windings including iron cores of the motor and the dielectric breakdown of terminals on the capacitor connected to the motor were detected. In order to measure the maximum temperature, "third level" wind velocity button was pushed and the time selection switch to "continuation" was set. Analyzed data would be available for the fire safety of the electric fan.

• The Magazine for Energy Service Companies
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• s.73
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• pp.52-55
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• 2011

'2011 대한민국 녹색에너지대전'이 지식경제부 주최, 에너지관리공단 주관으로 지난 10월 19일 서울 삼성동 코엑스(A,B홀)에서 개최되었다. 올 해로 31회를 맞이한 대한민국 녹색에너지대전은 '세이브 에너지, 스마트 라이프(Save Energy, Smart Life)라는 주제로 13개국, 247개 업체가 참가하였으며, 에너지절약 및 효율 향상 분야, 신재생에너지분야, 기후변화대응분야 등 녹색에너지 분야 전반을 총망라한 최신 녹색기술 제품들이 전시되었다. 이번 전시회는 코트라 주관의 수출상담회, 신재생에너지 유공자 포상이 열렸으며, 일반인 대상의 '신재생에너지 체험관'을 전시기간 내내 운영해 일반 관람객들이 태양광 선풍기 풍력자동차 등을 직접 조립해 보도록 해 관람객들의 호응을 얻었다. 21일 개최된 ESCO투자 사례 발표회에서는 산업체 건물에서 추진된 ESCO 투자 사례 정보를 제공해 주는 뜻 깊은 시간이 되었다. 특히 이번 전시회에는 대내외적으로 에너지절약에 대한 뜨거운 관심이 고조되는 가운데 롯데, LG전자, 삼성전자를 비롯해 효성, 삼천리 등 대기업이 대거 참가, 에너지효율 및 온실가스 저감 최신 기술을 선보였다. 이번 전시회에서는 에너지효율과 신재생에너지에 관심이 많은 관람객들과 최신에너지 기술을 도입하고자 하는 산업체 임직원, 신재생에너지 및 기후 변화대응분야 신규 사업에 관심이 있는 투자자 등 전시장을 찾는 모두에게 유익한 정보를 제공하는 뜻깊은 시간이 되었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.1122-1125
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• 2014

본 연구에서는 전신마비 환자들이 안구 마우스를 사용하여 전등, 선풍기, 창문 제어 및 침대 각도 조절을 할 수 있고, 보호자에게 소변통 알림과 응급메시지 알림을 보낼 수 있는 홈 네트워크 시스템을 설계하고 구현한다. 또한 전신마비 환자들뿐만 아니라 일반 사용자들도 이용할 수 있도록 동일한 기능을 모바일 어플리케이션으로 구현한다. 본 연구의 입력장치인 안구 마우스는 삼성전자 창의개발연구소에서 개발한 eyeCan을 사용하였다. 전체적인 시스템은 Arduino를 사용하여 제어하고, 무선 통신은 Xbee모듈을 사용하여 구현하였다. 기존의 홈 네트워크 시스템은 일반 사용자들만 이용할 수 있지만, 본 연구에서는 루게릭 환자처럼 전신을 움직이지 못하는 환자들에게 최적화된 홈 네트워크 시스템을 구축하여 소외계층의 스마트 기기에 대한 접근성을 높이고, 자립심을 키울 수 있도록 도와준다는 점에서 의의가 있다.

• Resources Recycling
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• v.6 no.2
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• pp.47-59
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• 1997

Thc paper points oul ever increasing amounts of plastics used in dex, clopmg countries and the prohlelns associated with such increase. Tl~e current status of the production and usc of plaslic materials is reviewed. Also reviewed lncludc thc pahcicies and gu~dclmcs canccrning the treatment of used plastics which have already bccn mstitutcd.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.5-8
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• 2019

Recently, we have been demanding the comfort of the indoor environment due to environmental problems such as fine dust and yellow dust. In addition it is pursuing the most pleasant indoor environment for humans. In this study, we designed and implemented monitoring systems and mobile applications to enable information such as room temperature and humidity. Open source software and open source hardware are required to design and implement the systems proposed in this study. In this study, the systems implemented used a bluetooth module, a light sensor, and a temperature and humidity sensor. In the future, we expect to be a basic study of systems that can operate dehumidifiers, warm-air fans, fans and humidifiers using motors and optimize indoor environment.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.5
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• pp.147-154
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• 2009

Lately, superhigh speed network infra is developing with the fast speed, is evolved by step that existent appliances are digitalised and appliances are become remote control by being gear to network. Also, gearing in Home network and superhigh speed network infra, control appliances in Internet and research that do monitering is proceed. Therefore, describe about indoor environment automatic control system that use Wireless sensor and Microcontroler in this paper. Because using that electric power, Zigbee sensor and Wireless module, embodied system that measured in the room temperature and use ATmega128 Microcontroler and use each device (temperature, illumination, humidity) back in house and control humidifier, electric fan etc. Can use variously in Home network field by this Wireless sensor and Microcontroler base, and also can apply variously to several industry fields as well as Home network field.