• Advances in Energy Research
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• 제8권4호
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• pp.243-252
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• 2022

The hybrid wind-solar energy concept has a big influence on the spread of wind and solar power projects in India since it combines the benefits of both industries while also providing extra benefits such as resource sharing such as land, infrastructure, and power evacuation systems. Furthermore, while the hybrid policy may reduce certain barriers to the installation of wind and solar energy in India, there are still some issues that must be resolved rapidly in order to ensure a sustainable installation. According to the study's findings, the installation of wind and solar power plants is significantly influenced by energy policy. The wind-solar hybrid energy strategy will also be crucial in the near future for growing the usage of renewable energy sources. Aside from that, the establishment of Green Energy Open Access (GEOA) and the restart of the trading of Renewable Energy Certificates (REC) would promote the quick deployment of standalone and hybrid renewable power projects throughout the nation, enabling it to reach 500 GW of installed non-fossil energy capacity by 2030.

• 기술혁신학회지
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• 제7권2호
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• pp.325-349
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• 2004

This paper tried to evaluate an economic analysis about research and development far areas of renewable resource in Korea. To evaluate this validity, we tried to calculate the spillover effect of R＆D investment through input-output table. In the first stage of spillover effect, we simply calculate the rate of return on R＆D investment for renewable energy resources in Korea through the input-output model, which can calculate the value added as well as output based upon the price of 2000 year. According to the first stage calculation, the rate of return on R＆B investment in solar heat is higher than any other renewable energy. In the second stage we tried to calculate the second round of spill over effect, which derives from the additional amount of supply of renewable resources due to the R＆D investment. The overall evaluation of R＆D invesment including the first stage as well as second stage spillover effect shows that bio-energy and waste energy generate 14 times as well as 2.5 times in the rate of return respectively.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권1호
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• pp.97-115
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• 2022

Smart power grid is a user friendly system that transforms the traditional electric grid to the one that operates in a co-operative and reliable manner. Demand Response (DR) is one of the important components of the smart grid. The DR programs enable the end user participation by which they can communicate with the electricity service provider and shape their daily energy consumption patterns and reduce their consumption costs. The increasing demands of electricity owing to growing population stresses the need for optimal usage of electricity and also to look out alternative and cheap renewable sources of electricity. The solar and wind energy are the promising sources of alternative energy at present because of renewable nature and low cost implementation. The proposed work models a smart home with renewable energy units. The random nature of the renewable sources like wind and solar energy brings an uncertainty to the model developed. A stochastic dual descent optimization method is used to bring optimality to the developed model. The proposed work is validated using the simulation results. From the results it is concluded that proposed work brings a balanced usage of the grid power and the renewable energy units. The work also optimizes the daily consumption pattern thereby reducing the consumption cost for the end users of electricity.

• 신재생에너지
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• 제2권2호
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• pp.108-117
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• 2006

This paper focus on power development options for remote islands. Recently, in accordance with progress in distributed generation technologies including renewable energy sources, many options are possible as power development option for island. At first we estimate generation cost by generation technology then recommend and suggest some countermeasures and implementation for institutional improvement.

• 기술혁신학회지
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• 제14권4호
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• pp.736-760
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• 2011

신 재생에너지 인력은 신 재생에너지 산업의 지속적인 성장을 위한 필수 요소이다. 본 연구에서는 신 재생에너지 산업의 인력 현황을 파악하고, 신 재생에너지 산업성장전망을 반영하여 2015년 신 재생에너지 인력수요를 전망하였다. 정량 분석방법론으로는 미국 노동통계국(BLS)의 저량접근법(stock approach)을 응용하였다. 또한 설문을 통하여 신 재생에너지 인력 수급 및 인력양성 프로그램에 대한 전문가들의 의견을 수렴하였다. 연구결과 신 재생에너지 산업 부문의 인력수요증가가 2010년에 1.4만 명에서 2015년에 3.3만 명으로 증가하여 연평균 20%에 가까운 증가율을 보일 것으로 분석되었다. 전문가 설문에서는 현재 신 재생에너지 인력 공급량 부족으로 앞으로 우리니라 신 재생에너지 보급 및 산업 성장 목표달성을 위하여 인력 공급대책이 조속히 마련되어야 함을 알 수 있었다. 또한, 적절한 신 재생에너지 인력 양성 프로그램 수준 결정을 위한 노력이 필요한 것으로 분석되었다. 본 연구결과는 향후 지속적인 신 재생에너지 산업 발전을 위한 인력 양성 방안에 활용될 수 있을 것이다.

• Current Research on Agriculture and Life Sciences
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• 제32권4호
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• pp.215-223
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• 2014

This study examines the contribution level of greenhouse gas(GHG) emission reduction and installation costs of renewable energy facilities. The GHG emission forecasts and industrial structures in the 16 regions of Korea are then analyzed to identify the proper supply of renewable energy sources for each region. The results show that water power is the most effective and efficient renewable energy source to reduce GHG emissions, followed by sunlight, wind power, geothermal heat, and solar heat, respectively. The 16 regions are then categorized into 4 groups based on their GHG emission forecast and industrial structure: high emission and manufacturing group, low emission and manufacturing group, low emission and service group, and high emission and service group. The proper supply of renewable energy sources for each group is then determined based on the contribution level and cost efficiency of GHG emission reduction.

• Nuclear Engineering and Technology
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• 제51권6호
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• pp.1689-1695
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• 2019

This study suggests a simple economic model to analyze electricity grid that consists of different power sources. The substitutability of renewable energy for nuclear power in Korean electricity transmission network is investigated by suggested model. The monthly data from January 2006 to December 2013 reported by Electricity Power Statistics Information System (EPSIS) of Korea Power EXchange (KPX) are used. To estimate the elasticities of substitution among four power sources (i.e. coal, natural gas, nuclear power, and renewable energy), this paper uses the trans-log cost function model on which local concavity restrictions are imposed. The estimated Hicks-Allen and Morishima elasticity of substitution shows that renewable electricity and nuclear power are complementary. The results also evidenced that renewable electricity and fossil fueled thermal power generation are substitutes.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.216-216
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• 2006

A special group of polymers, those from renewable resources, has attracted an increasing amount of attention over the last two decades, due to two major reasons: environmental concerns and the limitations of our finite petroleum resources. Generally, polymers from renewable resources (PFRR) can be classified into three groups: (1) natural polymers, such as starch, protein and cellulose; (2) synthetic polymers from natural monomers, such as polylactic acid (PLA); and (3) polymers from microbial fermentation, such as polyhydroxybutyrate (PHB). Like many other petroleum based polymers, various properties of PFRR are also vastly improved through blending and composites formation.

• 자원ㆍ환경경제연구
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• 제25권2호
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• pp.229-253
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• 2016

기후변화 대응 및 에너지 안보를 위해 세계 각국에서는 다양한 재생에너지 보급 정책을 수립, 시행하고 있다. 재생에너지 정책이 재생에너지 확산에 미치는 영향을 분석하는 많은 선행연구들에서는 종속변수로 재생에너지 발전량을 사용하고 있는데 자기상관(autocorrelation) 문제의 발생 가능성에도 불구하고 정태적 모형을 쓰고 있다는 점, 기술채택에 선행되어야 하는 기술혁신의 영향을 고려하지 않았다는 점에서 한계점을 지닌다. 본 연구에서는 동적 패널 모형(dynamic panel model)을 이용하고 기술혁신 변수를 추가함으로써 위의 두 한계점을 극복하고자 하였다. 분석 결과 FIT가 RPS보다 재생에너지 보급에 보다 효과적임을 알 수 있고, 재생에너지 기술혁신 또한 재생에너지 확대에 긍정적으로 기여한다는 사실을 밝혀내었다. 또한 이 결과를 바탕으로 기존 선행연구에서 공통적으로 직관과 어긋난 결과를 도출한 데에는 위의 두 한계점이 원인일 수 있다는 가능성을 확인하였다.

• 분석과학
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• 제37권4호
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• pp.251-260
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• 2024

As polymers became very important in our lives, their negative impact on general health and the environment raised a serious issue. Here, enhancing their life term is presented as a compromise solution between the need and harm. In the study, six PVC films, the plain and five filled with improvers, underwent radiation exposure for 300 hours at room temperature to investigate their photodegradation rates. The modified films were embedded with organotin(IV) complex derivatives (Ph₃SnL, Ph₂SnL₂, Bu₃SnL, Bu₂SnL₂, and Me₂SnL₂ (where L is levofloxacin)), and their effectiveness was evaluated. The PVC films were compared before and after exposure to various tests including UV-Vis spectroscopy, gel content analysis, theoretical calculations, and EDX microscopy. Findings indicated that the presence of organotin(IV) complex derivatives, particularly Ph3SnL, notably decreased UV light absorbance and the amount of gel content in PVC sheets in comparison to untreated PVC. Furthermore, EDX analysis showed that the PVC-Ph₃SnL blend exposed to radiation exhibited the highest chlorine content, reaching 30 %. This blend demonstrated superior efficacy in stabilizing the polymeric materials.