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A Study on the Methodology of Building Energy Consumption Estimation and Energy Independence Rate for Zero Energy City Planning Phase (제로에너지시티 계획을 위한 건물에너지 수요 예측 방법론 개발 및 자립률 산정에 대한 연구)

  • Bae, Eun-ji;Yoon, Yong Sang
    • Journal of the Korean Solar Energy Society
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    • v.39 no.5
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    • pp.29-40
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    • 2019
  • In response to the rapid climate change, in order to save energy in the field of buildings, the country is planning not only zero energy buildings but also zero energy cities. In the Urban Development Project, the Energy Use Plan Report is prepared and submitted by predicting the amount of energy demand at the planning stage. However, due to the activation of zero-energy buildings and the increase in the supply of new and renewable energy facilities, the energy consumption behavior of buildings in the city is changing from the previous ones. In this study, to estimate urban energy demand of Zero Energy City, building energy demand forecasts based on "Passive plans for use of energy based primary energy consumption", "Actual building energy usage data from Korea Appraisal Board" and "data from Certification of Building Energy Efficiency Rating" as well as demand forecast according to existing "Consultation about Energy Use Plan Code" were calculated and then applied to Multifunctional Administrative City 5-1 zone to compare urban total energy demand forecasts.

Renewable energy deployment policy-instruments for Cameroon: Implications on energy security, climate change mitigation and sustainable development

  • Enow-Arrey, Frankline
    • Bulletin of the Korea Photovoltaic Society
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    • v.6 no.1
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    • pp.56-68
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    • 2020
  • Cameroon is a lower middle-income country with a population of 25.87 million inhabitants distributed over a surface area of 475,442 ㎢. Cameroon has very rich potentials in renewable energy resources such as solar energy, wind energy, small hydropower, geothermal energy and biomass. However, renewable energy constitutes less than 0.1% of energy mix of the country. The energy generation mix of Cameroon is dominated by large hydropower and thermal power. Cameroon ratified the Paris Agreement in July 2016 with an ambitious 20% greenhouse gas (GHG) emission reduction. This study attempts to investigate some renewable energy deployment policy-instruments that could enable the country enhance renewable energy deployment, gain energy independence, fulfill Nationally Determined Contribution (NDC) and achieve Sustainable Development Goals. It begins with an analysis of the status of energy sector in Cameroon. It further highlights the importance of renewable energy in mitigating climate change by decarbonizing the energy mix of the country to fulfill NDC and SDGs. Moreover, this study proposes some renewable energy deployment policy-solutions to the government. Solar energy is the most feasible renewable energy source in Cameroon. Feed-in Tariffs (FiT), is the best renewable energy support policy for Cameroon. Finally, this study concludes with some recommendations such as the necessity of building an Energy Storage System as well a renewable energy information and statistics infrastructure.

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Case Study for Energy Conservation Measures of Hospital Buildings Using the Analysis of Energy Consumption Structure (의료시설 에너지절약 운영방법 도출을 위한 사례분석을 통한 에너지 영향요소 분석)

  • Lee, Sangmoon;Cho, Jinkyun
    • Journal of the Korean Solar Energy Society
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    • v.39 no.2
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    • pp.57-69
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    • 2019
  • Because the hospital building operates 24 hours a day, 365 days a year for treatment and restoration of patients, it has a different pattern of energy use than that of ordinary buildings. Hospitals contribute to energy consumption and have a negative environmental impact. This study aims to find how meaningful energy performance, reflecting good energy management and ECMs, can be operated for hospital buildings, a category encompassing complex buildings with different systems and large differences between them. In this study, we proposed the energy diagnosis & evaluation method and energy management process to verify energy saving through operation data based on system & facility characteristics, operation pattern and energy consumption characteristics of hospital building. Energy consumption structures were surveyed throughout 4 reference hospital in Seoul, Korea. Findings confirm that different hospital departments have hugely different energy-demand profiles. Energy efficiency and energy saving potentials are presented. The energy performance analysis can be applied to a wide range of problems in energy-system operation.

A Study on Energy Conservation behaviors of Consumers and Related factors (소비자의 에너지 소비 절약 행동 및 관련요인에 관한 연구 -서울시의 주부를 중심으 로-)

  • 백경미;이기춘
    • Journal of Korean Home Management Association
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    • v.5 no.2
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    • pp.29-44
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    • 1987
  • The objectives of this study were; (1)to determine if socio-demographic variables influence energy conservation attitude, energy conservation knowledge, energy conservation behavior of consumer, (2) to determine if energy conservation attitude and energy conservation knowledge influence energy conservation behavior of consumer, (3) to examine the causal relationships among variables which influence energy conservation behavior of consumer. The model for this study included following variables; (1) socio-demographic variables, which are the independent variables; (2) energy conservation behavior of consumer, which is a dependent variable; (3) energy conservation attitude of consumer, which is an intervening variable ;(4) energy conservation knowledge of consumer, which is an intervening variable. The data used in this study included 502 homemakers living in Seoul. Statistics used for data analysis were ANOVA, Pearson's Correlation and Path Analysis. The major findings were follows; (1) Energy conservation attitude and energy conservation behavior difference significantly according to the level of family income among socio-demographic variables such a age, educational level and family income. Energy conservation knowledge differenced significantly educational level, and family income. Energy conservation knowledge difference significantly educational level. (2) Energy conservation behavior differed significantly according to energy conservation attitude and energy conservation knowledge. (3) Energy conservation attitude and energy conservation knowledge had positive effects on energy conservation behavior directly and indirectly. (4) Family income had negative effects on energy conservation behavior directly and indirectly through energy conservation attitude. Education had positive effect on energy conservation behavior indirectly through energy conservation knowledge.

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Resource Assessment of Theoretical Potential of Ocean Energy in Korea (국내 해양에너지 이론적 잠재량 산정 연구)

  • HWANG, SUJIN;JO, CHULHEE
    • Transactions of the Korean hydrogen and new energy society
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    • v.30 no.5
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    • pp.465-472
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    • 2019
  • This paper describes the resource assessment of theoretical potential of ocean energy including tidal current energy, tidal range energy, wave energy and ocean thermal energy in Korea to provide reliable basis for feasible development plan of ocean energy. Because of different characteristics of each ocean energy resources, the resource assessment methods were established considering characteristics of each ocean energy resources. The coastal region of Korea has been divided into 10 regions. The results show that tidal current energy is abundant in Incheon-Gyunggi and Jeollanam-do and tidal range energy is abundant in Incheon-Gyunggi. And wave energy is abundant in Jeollanam-do, Jeju and Gyeongsangbuk-do and there is ocean thermal energy in Gangwon-do and Gyeongsangbuk-do.

Study on Economic analysis and Dessemination Policy of Unused Energy (미활용에너지의 경제적 효과 및 보급지원방안 연구)

  • An, Hyung-Jun;Baek, Sung-Kwon;Heo, Eunn-Yeong
    • 한국신재생에너지학회:학술대회논문집
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    • pp.95-98
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    • 2008
  • Temperature difference energy is a good energy source replacing the fossil fuels. In the study, we classified the temperature difference energy as 4 types by the source & using method. For the understanding economic property of temperature difference energy, we tried simle economic analysis. As the result, Pay back period of 4 case of the temperature difference energy are from 1.23 to 12.65 years. Major factors influenced economic effect are operation time and energy user distance from the temperature difference energy source. If we can select optimal capacity and look for more effient energy users, Temperature difference energy play a important role of replacing fossil energy. So, for dess emination of temperature difference energy, we suggest that temperature difference energy must be included in renewable energy. Applying the effective methods among various promotion program of renewable energy policy, utilization of temperature difference energy could be activated.

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Energy Conservation for Runoff and Soil Erosion on the Hillslope (산지사면의 유출 및 토양침식에 대한 에너지 보존)

  • Shin, Seung-Sook;Park, Sang-Deog;Cho, Jae-Woong;Hong, Jong-Sun
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.234-238
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    • 2008
  • The energy conservation theory is introduced for investigating processes of runoff and soil erosion on the hillslope system changed vegetation condition by wildfire The rainfall energy, input energy consisted of kinetic and potential energy, is influenced by vegetation coverage and height. Output energy at the outlet of hillslope is decided as the kinetic energy of runoff and erosion soil, and mechanical work according to moving water and soil is influenced dominantly by the work rather than the kinetic energy. Relationship between output and input energy is possible to calculate the energy loss in the runoff and erosion process. The absolute value of the energy loss is controlled by the input energy size of rainfall because energy losses of runoff increase as many rainfall pass through the hillslope system. The energy coefficient which is dimensionless is defined as the ratio of input energy of rainfall to output energy of runoff water and erosion soil such as runoff coefficient. The energy coefficient and runoff coefficient showed the highest correlation coefficient with the vegetation coverage. Maximum energy coefficient is about 0.5 in the hillslope system. The energy theory for output energy of runoff and soil erosion is presented by the energy coefficient theory associated with vegetation factor. Also runoff and erosion soil resulting output energy have the relation of power function and the rates of these increase with rainfall.

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Analysis of the World Energy Status and Hydrogen Energy Technology R&D of Foreign Countries (국제에너지 현황 및 수소에너지 연구개발 동향)

  • Kang, Seok-Hun;Choi, Sang-Jin;Kim, Jong-Wook
    • Transactions of the Korean hydrogen and new energy society
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    • v.18 no.2
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    • pp.216-223
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    • 2007
  • The present carbon-based energy system will not last long due to its environmental and economical drawbacks. Hydrogen energy attracts more attention recently and seems to have large ripple effect on economy providing its technical, environmental and economical problems are solved. This paper analyses the situation changed from fossil to non-fossil energy system and the R&D policies of advanced countries by reviewing the world energy status and the energy policy of foreign countries. Finally, the R&D strategy of hydrogen energy technology was developed through analyzing the present states of energy research policy and programs of major countries.

A Study on the Development of the Advanced Energy Performance Indicator for the Manufacturing Companies (제조업체의 에너지성과지표 고도화에 관한 연구)

  • Rho, Kyung-Wan;Song, Myung-Ho
    • Journal of the Korean Solar Energy Society
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    • v.35 no.5
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    • pp.31-38
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    • 2015
  • It is important to improve the energy performance in the industrial sector, and therefore most of the manufacturing companies need the energy performance indicators to identify the target and to verify the energy savings. However, the conventional energy performance indicators such as the total energy consumption and the energy intensity are not proper to use. The reason is that they do not consider adequate relevant variables including productions in the boundary of the manufacturing companies. Therefore, the study provides the advanced energy performance indicator using by the linear regression model according to each energy source to manage the target and to verify the energy performance properly.

An Analysis on CO2 Emission and Cost Effects of Hydrogen Energy in Sedan Sector (수소에너지의 승용차부문 도입에 따른 CO2 배출 감축 및 비용효과 분석 연구)

  • Hong, Jong-Chul;Kang, Seung-Jin;Choi, Sang-Jin;Park, Sang-Young;Kim, Jong-Wook
    • Transactions of the Korean hydrogen and new energy society
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    • v.20 no.1
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    • pp.9-21
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    • 2009
  • As one of the alternative solution for energy and environmental issues such as climate change, energy security, oil price, etc., hydrogen energy has been getting so much attentions these days. This paper analyzed the $CO_2$ emission, costs, and energy consumptions when the hydrogen energy was introduced to transportation, specifically in Sedan sector using the energy system model, MARKAL. As results, 21.5% of $CO_2$ emission in 2040 could be reduced and additional 76 billion dollars will be needed in the high energy price scenario. The amount of energy saving mainly due to the replacement of existing car to hydrogen vehicle was 16% of the final energy consumption in 2040.