• Advances in materials Research
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• 제4권2호
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• pp.63-76
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• 2015

The energy crisis involving depletion of fossil fuel resource is not the sole driving force for developing renewable energy technologies. Another driving force is the ever increasing concerns on the air quality of our planet, associated with the continuous and dramatic increase of the concentration of greenhouse gas (mainly carbon dioxide) emissions. The internal combustion engine is a major source of distributed $CO_2$ emissions caused by combustion of gasoline derived largely from fossil fuel. Another major source of $CO_2$ is the combustion of fossil fuels to produce electricity. New technologies for generating electricity from sources that do not emit $CO_2$, such as water, solar, wind, and nuclear, together with the advent of plug-in hybrid electric vehicles (PHEV) and even all-electric vehicles (EVs), offer the potential of alleviating our present problem. Therefore, the relevant technologies in $LiFePO_4$ as cathode material for Li-ion batteries suitable to the friendly environment are reviewed aim to provide the vital information about the growing field for energies to minimize the potential environmental risks.

• 대한전기학회논문지:전력기술부문A
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• 제48권4호
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• pp.358-364
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• 1999

The auxiliary transformers or start-up/stand-by transformer(s) are installed against the start-up and shut-down of generator and emergency status in fossil power plant. The on-site power supply configuration using these transformers must be determined, considering configuration requirements, site characteristics, reliability and availability severely because it is remarkably important for safety and ecfonomy of plant. The auxiliary or start-up/stand-by power supply configuration has been determined considering only safety requirements and construction cost until now in Korea. This paper presents general theorems for the reliability estimation and proposes 2-unit based 4 alternatives for the start-up power supply stystem of 500㎿ standardized fossil power plant. The reliability and unavailability of equipment, system and configuration are determined using minimal cut-set methodology. The optimized plan of 4 alternatives is determined based on this ultimate reliability and unavailability.

• Advances in Energy Research
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• 제6권1호
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• pp.1-15
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• 2019

The objective of the study is to examine the relationship between water resources, energy demand, food production, and environmental pollutants in selected SAARC nations, namely, Bangladesh, India, Pakistan, and Sri Lanka, during the period of 1990-2016. The results show that water, energy, and food (WEF) resources substantially affected air quality in the form of high mass carbon emissions, fossil fuel energy demand, methane discharges, nitrous oxide emissions, and greenhouse gas emissions in these countries. Food production and food deficit largely increase $CO_2$ emissions due to unsustainable production and malnutrition, while land use under cereal production increases $CH_4$ and $N_2O$ emissions. Electricity production escalates $CO_2$ emissions and fossil emissions across countries. The results support the carbon EKC hypothesis, while monotonic increasing function exists in case of fossil fuel energy. The study emphasizes the need to ensure environmental sustainability agenda by adopting cleaner production technologies in WEF resources.

• 대한공간정보학회지
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• 제24권1호
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• pp.51-59
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• 2016

전 세계 화석 에너지의 사용량은 지속적으로 증가하고 있다. 기존의 화석 에너지 사용 국가뿐만 아니라 개발도상국의 화석 에너지 사용량 또한 증대되면서 유한한 화석 에너지의 고갈에 대한 불안감은 커지고 있다. 또한 화석에너지로 인한 환경오염, 경제적 사회적 문제는 해결해야 할 과제로 남아있다. 태양광은 환경을 해치지 않는 청정에너지이지만, 태양광 발전소를 설치하는 과정에서 여러 문제가 발생한다. 이러한 문제점들을 해결하기 위해 수상 태양광 발전소가 대안으로 떠오르고 있다. 하지만 아직까지 수상 태양광 발전소에 대한 입지 분석이 이루어지지 않고 있다. 본 연구에서는 수상 태양광 발전소의 입지 조건을 지형 및 기후 인자를 이용한 계층분석법을 통해 결과를 분석하였다. 그리고 적합분류표에 따라 각각 인자들의 속성정보에 점수를 부여하고, 여기에 가중치를 곱한 뒤 점수를 시각화하여 분석하였다. 그 결과 경상북도 북부지역의 점수 분포가 남부지역보다 높게 나왔다. 특히 안동시의 안동호와 영양군의 저수지가 최적입지로 추출되었다. 낮은 점수가 나온 곳은 강, 하천의 중심부가 아닌 하천의 경계면이었다. 본 연구를 통해 더욱 정확한 수상 태양광 발전소 입지 분석이 될 것이라고 기대한다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집D
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• pp.721-725
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• 2001

The main reason for applying pulverizer classifier-rotary type in fossil power plant is boiler high efficiency and energy saving movement in the government. This study intends to analyze the boiler efficiency through the pulverizer classifier-rotary type improvement in thermal power plant and makes its comparison to that of the used fixed type.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집D
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• pp.715-720
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• 2001

The main reason for applying positive pressure variable clearance packing in fossil power plant is high efficiency and energy saving movement in the government. This study intends to analyze the turbine efficiency through the shaft packing improvement in thermal power plant and makes its comparison to that of the used packing.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.204-204
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• 2000

This paper describes the development of training simulator for Hadong fossil Power Plant. The simulator was developed to train operator, test new control Logic and evaluate alternative operating procedure for expert engineer of control system. The most control logics such as Siemens TELEPERM ME and GE Mark V are translated directly from microprocessors. Those HMI are also directly emulated. The simulation was performed by ProTRAX modeling software. The paper discusses the configuration of simulator and the simulation results of 30%, 50%, 75% and 100% normal rate load test.

• 한국지구과학회지
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• 제34권5호
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• pp.402-406
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• 2013

Since 1984, the author has been studying the Daedong flora and has collected a large number of fossil plants from the Amisan Formation of Nampo Group distributed in Chungnam Coal-Field. One of the fossil plants was bennettitalean male flower, which was collected in 1986. The author described it as Weltrichia sp. The occurrence of Weltrichia sp. is the first record in the Early Mesozoic Daedong flora of Korea.

• 기술사
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• 제37권1호
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• pp.43-47
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• 2004

The purpose of this article is to introduce ocean energy and its application. In recent years, the energy consumption and requirement of fossil resources are increased due to the advanced life style. But, the amount of fossil fuels have limitation. Also, it is difficult to construct new large power plant facilities for the production of electric energy. Therefore, the necessities to study and to find out other energy resources are increased more and more. In the ocean, the efforts of using tide, wave, tidal current and thermal energy are should be attempt. To satisfy the needs, corporation is required among the government, research institute, university and company.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.782-783
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• 2007

Exhaustion of fossil fuel resources and high oil price, and furthermore environmental crisis due to emission of carbon dioxide from fossil fuel are serious problems in these days. In order to overcome these problems it is necessary to find and utilize the every energy saving measures and to make maximum utilization of renewable energy resources. The objective of this paper is to develop an instrument to verify the feasibility of Co-Generation System application in an Apartment Complex.