To develop technology for extracting energy resources from seawater, we first investigated the research experiences of domestic experts. The survey items included the types of adsorbents that can adsorb dissolved resources in seawater, the subjects of experiments, and the scope of research. We divided the types of adsorbents into organic and inorganic categories and compared their adsorption performance. We also examined how adsorption experiments were conducted using simulated solutions and confirmed whether there were any experiences of conducting experiments in actual seawater. A total of 14 domestic research papers on extracting dissolved resources from seawater were reviewed, excluding topics such as removing dissolved resources from seawater and seawater desalination. This review provides an understanding of domestic research trends and will be helpful in setting directions for future research and development.

Seawater containing metals such as lithium and manganese is a “treasure trove” of infinite energy resources. Numerous domestic and foreign institutions are developing technologies to economically extract these resources from seawater. One method for extracting metal ions dissolved in seawater is the development of adsorbents with negative functional groups. Generally, adsorbents have adsorption performance that depends on factors such as seawater pH and temperature, but controlling the pH and temperature of seawater is practically impossible. On the other hand, thermal effluent discharged from power plants tends to be slightly higher in temperature than the surrounding environment. Therefore, this study investigates the potential for utilizing power plant effluent to extract dissolved resources in seawater. Results of investigations into several items related to the effluent from the Gori, Wolsong, Hanbit, and Hanul power plants are presented.

본 연구는 육상풍력 입지지도를 고도화하기 위하여 초고해상도 풍력이용률 자원지도와 풍력시장 경제성 모델을 활용하여 풍력자원 분류지도를 개발하였다. 풍력자원 분류는 경제성의 유무에 따라 적합성을 상, 하로 구분하되 적합성 상내에서도 우수지역을 추가 분류하여 우선 검토대상지역을 제시하였다. 국내 풍력입지를 분석한 결과, 전국의 25.1%는 경제성이 있었으며 이중에서 1.7%는 우수지역에 해당하였다. 풍력자원의 경제적 적합성 평가 결과는 이용률 지도의 정확도, 설비설치비용(Capital expenditure, CAPEX), 그리고 계통한계가격의 변동성에 따라 적합성 상 지역은 –7.6%p ~ 12.6%p(적합성 우수 지역은 –1.1%p ~ 2.7%p)까지 변화하였다. 풍력 자원은 보조금, 이용률에 가장 크게 영향을 받는 반면, CAPEX의 변화는 경제성 없는 지역이 경제성 있는 지역으로 바뀔 수 있는 확률이 크다는 것도 확인했다.

본 연구는 에너지 인력양성사업을 중심으로 국가의 R&D 사업의 성과를 분석 하고, 성과지표 개선방안을 찾는 데 주목적이 있다. 주요 분석대상은 2010년 이래 지원된 86 개 에너지인력양성사업이다. 에너지인력양성사업의 성과지표는 연구역량이나 배출인원, 산 학연계 정도, 고용창출 등과 관련되어 있는데 KPI index로 지칭되는 11개 항목의 인력양성 성과지표를 많이 활용해 분석하였다. 과제별로 제시된 목표치의 달성 수준을 분석한 결과 평 균적으로 달성도가 가장 높은 지수는 기업연계율이며, 달성도가 가장 낮은 지수는 참여기업 취업인원인 것으로 나타났다. 기업연계활동의 핵심 고용창출효과를 살펴본 결과 인턴십의 횟수가 많을수록 에너지 분야 고용창출효과가 큰 것으로 나타났으며, 전문가강의의 수가 많 을수록 참여기업 취업인원이 증가하는 것으로 나타났다. 이상의 분석결과는 다음과 같은 시사점을 제시하고 있다. 첫째, 사업운영 과정에 대한 지표인 기업연계 활동 자체보다 이를 통 해 나타나는 취업 등 핵심 성과에 더 초점을 맞춘 성과지표 재설계와 관리가 필요하다. 둘째, 사업의 질적 성과를 표현할 수 있는 지표와 실제적인 기업연계를 표현할 수 있는 성과지표를 추가하는 방안을 고려할 필요가 있다. 셋째, 정책적 성과목표 및 주요 목표 집단 등에 따라 차별화된 성과관리가 필요하다. 마지막으로 성과지표의 정비와 더불어 정보입력 및 축적 시 스템 개선이 필요하다.

Importance of alternative energy has been increasing due to environmental issues and lack of fossil fuels. In addition, heating cost that occupies from 30 to 40 % of the total production cost in Korean protected cultivation needs to be reduced for profitability and global competition. Therefore, this study was conducted to develop energy model and regional resource for recycling of resource in greenhouse. Based on the results of the theoretical and statistical investigations, energy model of regional resource was developed. This results was shown with a new standard 2,000 heads of pigs. Livestock manure was originated 8.6 kg/day/one head, and the average biogas yield was 1.23 Nm3/day occurred. The biogas reactor and engine showed that scale of 300 m3 was 25kW respectively. Agricultural and Forest Residual-products Biomass quantity in heating road of 200,000kcal/h were 1,224 kg, 912 kg respectively.

Bioenergy is classified to one of the renewable energy resources such as solar, wind, hydro and tidal energies. It should be noted that all the renewable energies contribute to the reduction of greenhouse gases emission. In some cases, energy from wastes was also categorized as a renewable energy in our country even though it has only negligible effect on the emission reduction. In this paper, we tried to identify the bioenergy in order to follow the global indices of the renewable energy. The indices evaluated here were whether a resource is renewable, iogenic, biodegradable, combustible and organic. Biogenic and combustible were selected as the indices to identify the bioenergy. It was also suggested that combustible as an index can be exchangeable to organic.

최근 관심을 받는 풍력자원개발에 대한 기초적, 실용적인 연구를 수행하고 자료를 확보하기 위해서는 실제 그 지역 주위 유동특성에 대한 지식이 매우 중요하다. 두 개의 초음파 유속계와 널리 사용되고 있는 컵유속계와 풍향기를 유동방향에 수직하게 설치하여 높이가 약 4.5m에서 풍속의 평균과 변동성분을 측정하였다. 실험 결과 레이놀즈 수는 약 6.7×105, 그리고 마찰유속, u*는 약 0.32m/s로 측정되었다. 수평 및 수직 평면 풍속에 대한 파워 스펙트럼 분석은 다양한 주파수 범위의 값들을 조합하여 넓은 주파수 범위에 대해 분석 할 수 있었다. 스펙트럼 분석 결과 4개의 지배적인 와류 에너지 피크 값을 관찰 할 수 있는데, 각각의 피크 값들은 약 1~2분, 8시간, 24시간 그리고 100시간의 주기로 나타나는 것을 확인하였다. 또한, 이 피크들 사이에 넓은 스펙트럼 갭이 0.2~10 cycle/hour 주파수 범위에 걸쳐 나타나고 있다.

This study examined the potentials for greenhouse gas reduction by material recovery and energy recovery from municipal solid waste between 2017 and 2026 in Daejeon Metropolitan City (DMC), which is trying to establish a material-cycle society by constructing a waste-to-energy town by 2018. The town consists of energy recovery facilities such as a mechanical treatment facility for fluff-type solid refuse fuel (SRF) with a power generation plant and anaerobic digestion of food waste for biogas recovery. Such recycling and waste-to-energy facilities will not only reduce GHGs, but will also substitute raw materials for energy consumption. The emissions and reduction rate of GHGs from MSW management options were calculated by the IPCC guideline and EU Prognos method. This study found that in DMC, the decrease of the amount of MSW landfilled and the increase of recycling and waste-to-energy flow reduced GHGs emissions from 167,332 tonCO2 eq/yr in 2017 to 123,123 tonCO2 eq/yr in 2026. Material recycling had the highest rate of GHG reduction (-228,561 tonCO2 eq/yr in 2026), followed by the solid refuse fuels (-29,146 tonCO2 eq/yr in 2026) and biogas treatment of food waste (-3,421 tonCO2 eq/yr in 2026). This study also shows that net GHG emission was found to be -30,505 tonCO2 eq in 2017 and -105,428 tonCO2 eq, indicating a great and positive impact on future CO2 emission. Improved MSW management with increased recycling and energy recovery of material waste streams can positively contribute to GHGs reduction and energy savings. The results of this study would help waste management decision-makers clarify the effectiveness of recycling MSW, and their corresponding energy recovery potentials, as well as to understand GHG reduction by the conversion.

Environmental pollution is the major problem associated with rapid industrialization, urbanization and rise in living standards of people. In order to reduce environmental pollution, therefore, shielding materials using industrial waste resources were developed and the radiation shielding performance was evaluated.

지속 가능한 신재생 에너지에 대한 수요는 전 세계적으로 증가하는 반면 공급은 제한적인 상황이다. 본 논문에서는 대전광역시 내에서 발생하는 가연성 생활폐기물로부터 생산되는 고형연료(SRF)를 전용 소각로에서 소각하여, 생산된 스팀을 터빈 발전기를 이용하여 전기를 생산하고 잉여스팀을 대덕산업단지에 공급하고, 음식물류폐기물 및 음식물 쓰레기 침출수의 혐기성 소화로 인해 발생기는 바이오가스를 대전열병합발전(주)에 공급하는 방안에 대한 경제적 타당성을 분석하였다. 잉여 바이오가스 공급의 경우 음식물류폐기물 및 음식물 침출수 재활용 과정에서 발생하는 바이오가스 26,300m³/day 가운데 23,200m³/day를 대전열병합발전(주)에 공급하도록 하고 잉여스팀 공급의 경우 2023년에 약 204,000ton/yr까지 수요가 꾸준히 증가할 것으로 예상되므로 25.7ton/hr의 증기를 155day/yr 기준으로 공급할 것으로 예상된다. 대덕산업단지의 추가 증기 수요는 연간 101,537ton으로 추정된다. 바이오가스 구매 비용은 생산 단가의 30%로 계획하고 잉여 바이오가스의 예상 공급량은 23,200m³/day로 대전열병합발전(주)의 기존 소비량인 18,627m³/day보다 많으나, 대덕산업단지에 공급되는 잉여스팀의 연간 예상 공급량은 96,000ton/yr로 대덕산업단지의 추가 증기 수요인 101,537ton/yr보다 적다. 이것은 잉여 자원의 순환이 대전의 에너지 수요의 균형을 이룰 수 있는 가능성을 나타낸다. 이를 통해, 잉여스팀 활용 측면에서 대전광역시는 50%의 매출 발생, 대전열병합발전(주)은 40%의 부가적 이윤 창출, 대덕산업단지와 인근 지역사회는 10% 비용 절감 효과를 기대할 수 있으며, 잉여 바이오가스 활용 측면에서 대전광역시는 30%의 매출 발생, 대전열병합발전(주)은 60%의 부가적 이윤 창출, 대덕산업단지와 인근 지역 사회는 10%의 비용 절감 효과를 기대할 수 있다. 또한 화석연료 사용 절감을 통하여 그에 대한 에너지 의존도를 줄이고 온실가스 감축 효과로 인한 국가 환경에너지 정책에 기여하여 환경적인 측면으로 우수한 성과를 얻을 수 있으며, 지역 기업의 경쟁력 강화를 도모하고 에너지 자금 사용에 따른 법인세 감면 및 온실가스 감축 사업을 통한 수익창출을 기대할 수 있다. 본 연구는 지역난방을 지역 사회에 공급하고 스팀을 에너지원으로 대덕산업단지에 공급하기 위한 에너지 네트워크를 구축하기 위해 수행되었다. 잉여스팀 및 바이오가스의 사용과 관련된 초기 투자비용, 운영 및 유지 보수비용이 계산되었고 NPV 및 IRR 분석 결과 경제적으로 실현 가능함이 밝혀졌다.

This study aims to discuss measures to combat climate change pertaining to the waste sectors in the EU and Japan.The EU aims to secure 20% of its total energy consumed from renewable sources and to reduce the emission of greenhousegases by 20% by 2020. This study investigated the amount of waste-based energy produced and confirmed that it makesa significant contribution to renewable energy sources. The amount of energy produced differs according to the type ofwaste utilized and the size (population) of the country and these factors should be taken into account when establishingresponse measures. In Japan, policies have been introduced to promote the recovery of energy and to reduce the greenhousegases emitted by incinerators. In particular, the country has been promoting a high level of efficiency by differentiatingthe government subsidy funding according to the energy recovery rate. This study confirmed that the utilization of wasteresource energy has made a significant contribution to reducing the emission of greenhouse gases in the member countriesof the EU and in Japan. Korea needs to establish similar policies to increase the contribution of energy from wasteresources in the future.

The Ministry of Trade, Industry and Energy is now placing emphasis on the importance of a new and renewable energy resource map service as an essential means of promoting the dissemination and adoption of renewable energy and other related industrial activities. To raise satisfaction with the new and renewable energy resource map service and promote its utilization, a survey was conducted on a sample group with an academic research background, i.e. employees of the Korea Institute of Energy Research (KIER) who have a thorough understanding of the technological concepts behind the new and renewable energy resource map. Statistical analysis of the survey results showed a high level of overall satisfaction with the web service for the new and renewable energy resource map. Therefore, it was concluded that the development of practical contents rather than the enhancement of web service convenience is required. A statistically significant trend was also observed whereby, the longer the professional career of the survey respondents, the greater their perception and utilization of, and satisfaction with, the enhanced service, which indicates that their level of understanding and utilization of technological concepts corresponds to their research experience record. In addition, the results obtained from the questionnaires regarding the evaluation of the utilization value of the resource map service indicated that use of the service was equally high in terms of political, business and academic applications. The results confirmed the need to develop multidimensional resource map contents that can be applied to as many fields as possible, rather than focusing on a specific terrain.

According to the change of waste management policy, the focus of product-oriented environmental management has been moved from follow-up management to advanced prevention since early 2000s. For achieving advanced prevention, assessment models to evaluate environmental performance of goods need to be established which can be used at design and manufacture stage for analyzing expected environmental loads and promoting recycling of resources. In this study resource recyclability assessment model for non-energy goods was developed. The model mainly consists of assessment items and instructions of each item. Assessment items are composed of 6 common items and 1 individual item for each group of target goods.

Biomass resources might be recognized as a promising way to alter fossil fuels, such as petroleum oil, natural gas and coal and to prevent the emission of greenhouse gases which will bring about global warming. Therefore many countries have tried to identify and secure available biomass resources. In this study, the energy potential of Korean biomass resources, such as agricultural biomass wastes, municipal solid wastes, and livestock wastes, was analyzed and calculated by using various data. The available energy potential in 5 major cities in Korea was over 3.5 M TOE. Especially the municipal solid wastes was over 1.5 M TOE, so the conversion of municipal solid wastes might be easily adopted.