• 연구논문집
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• 통권31호
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• pp.45-51
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• 2001

One of emerging technologies under development in the advanced countries is considered as RDF(Refuse Derived Fuel) power generation, which could meet both the requirement of an alternative energy resource utilization and $CO_2$ reduction. This paper deals with the effect to the thermal effiency and CO2 reduction of RDF firing power generation. The statistical data of domestic MSW generation in last year in small and medium cities for evaluating the merits of the RDF power generation were used. The analysis for RDF power generation compared to the existing incinerator w/o(or w/) power generation shows around 20.6%(10.0%) up in the total thermal efficiency and 57.0%(31.4%) up in the $CO_2$ reduction respectively.

• 한국태양에너지학회 논문집
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• 제29권5호
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• pp.20-27
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• 2009

The effect of borehole thermal resistance on the borehole length is studied. In performing this work a new concept BLRR(borehole length reduction rate) is developed based on the line source model. The solution of line source model is shown to be valid through the comparison with the data of thermal response test. It is shown that BLRR is a function of soil thermal conductivity(k) and borehole thermal resistance($R_b$). The value of BLRR increases with increasing k, which means reducing $R_b$ is more effective when k is high. The reduction of borehole length with change of $R_b$ is easily estimated with BLRR. The validity of BLRR is also examined with EED analysis.

• Nuclear Engineering and Technology
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• 제42권2호
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• pp.183-192
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• 2010

An electrochemical reduction of a mixture of metal oxides was conducted in a LiCl molten salt containing 3 wt% $Li_2O$ at $650^{\circ}C$. The oxide reduction was carried out by applying a current to an electrolysis cell, and the $Li_2O$ concentration was analyzed during each run. The concentration of $Li_2O$ in the electrolyte bulk phase gradually decreases according to Faraday's law due to a slow diffusion of the $O^{2-}$ ions. A hindrance effect of the unreduced metal oxides was observed for the reduction of the uranium oxide. Cs, Sr, and Ba of high heat-load fission products were diffused into and accumulated in the salt phase as predicted with thermodynamic consideration.

• 대한건축학회논문집:구조계
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• 제34권8호
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• pp.13-18
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• 2018

The purpose of this study was to study on the estimation of green remodeling energy reduction tool in building construction. Green Remodeling Decision System that can predict the energy reduction effect in green remodeling is developed as a tool for simple remodeling of green remodeling considering users' convenience, so that it can quickly and comprehensively determine power peak load reduction factor technology. A preliminary simulation result of a short preliminary remodeling evaluation is DB. It will be developed as a tool that can be easily accessed by users such as web and apps.

• 한국대기환경학회지
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• 제24권1호
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• pp.55-62
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• 2008

This study is aimed at substantially reducing the particulate matter (dust) emission during the combustion of heavy fuel in boilers by addition of combustion improver. The combustion improver used were the oil-soluble organometallic compounds that were found to be more effective than the dispersing agents that are generally used for reducing the particulate emission. The dust reduction effect was found to depend on the active materials (metals) as well as on the organic ligand part of organometallic compounds. Acetylacetonoate and naphthenate of Fe and Ca were found to be most effective for dust reduction. Addition of Fe and Ca organometallic compounds as combustion improver in concentration of 30 ppm (metal basis) to heavy fuel oil, caused dust reduction by 50 wt% to 80 wt%.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2017년도 춘계학술논문요약집
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• pp.94-95
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• 2017

• 신재생에너지
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• 제19권4호
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• pp.20-26
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• 2023

Emitted CO₂ is an attractive material for microbial electrochemical CO₂ reduction. Microbial electrochemical CO₂ reduction (i.e., microbial electrosynthesis, MES) using biocatalysts has advantages compared to conventional CO₂ reduction using electrocatalysts. However, MES has several challenges, including electrode performance, biocatalysts, and reactor optimization. In this study, an MES system was investigated for optimizing reactor types, counter electrode materials, and CO₂-converting microorganisms to achieve effective CO₂ upcycling. In autotrophic cultivation (supplementation of CO₂ and H₂), CO₂ consumption of Rhodobacter sphaeroides was observed to be four times higher than that with heterotrophic cultivation (supplementation of succinic acid). The bacterial growth in an MES reactor with a single-chambered shape was two times higher than that with a double chamber (H-type MES reactor). Moreover, a single-chambered MES reactor equipped with titanium mesh as the counter electrode (anode) showed markedly increased current density in the graphite felt as a working electrode (cathode) compared to that with a graphite felt counter electrode (anode). These results demonstrate that the optimized conditions of a single chamber and titanium mesh for the counter electrode have a positive effect on microbial electrochemical CO₂ reduction.

• 자원ㆍ환경경제연구
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• 제31권4호
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• pp.825-848
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• 2022

이 논문은 국내 제조업부문의 에너지소비 증가 요인을 LMDI(Log mean divisia index) 분해 분석방법을 이용하여 분석하였다. 1999년부터 2019년까지 20년간의 에너지소비 변화를 분석하였다. LMDI 분해 분석방법 중 에너지소비 증가량을 분석한 가법적 요인분해 분석과 에너지소비 증가율을 분석한 승법적 요인분해 분석 모두를 사용하였다. 분석결과, 국내 제조업의 에너지소비를 증가시킨 요인은 생산효과이며, 구조효과와 집약도 효과는 에너지소비를 감소시키는 요인으로 나타났다. 특히 구조효과에 의한 에너지소비 감소가 집약도 효과에 의한 에너지소비 효과보다 더 크게 나타났다. 시기별로 보면, 2011년까지는 에너지소비가 생산효과에 의해 급속히 증가한 반면 그 이후에는 생산효과에 의한 에너지소비 증가가 둔화된 것을 알 수 있다. 이에 반해 그 이후에는 구조효과와 집약도효과에 의한 에너지 감소효과가 두드러지고 있는데 이는 2011년부터 실시된 온실가스·에너지목표관리제와 2015년 이후 실시된 배출권거래제의 효과가 나타난 결과로 보인다. 향후 제조업부문의 에너지절약을 위해서는 EMS(Energy management system), FEMS(Factory energy management system) 등을 통한 에너지진단과 관리가 더욱 필요해 보인다. 아울러 에너지저소비형 산업으로의 구조조정도 더 필요해 보인다.

• 환경정책연구
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• 제8권4호
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• pp.51-73
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• 2009

오늘날 환경교육의 중요성이 대두되고 있음에도 불구하고 환경교육이 에너지 절감 또는 쓰레기 절감에 미치는 정량적 효과에 대한 연구는 거의 전무한 실정이다. 본 연구는 환경교육이 집중적으로 행해지는 집단과 일반적으로 행해지는 집단의 에너지 및 쓰레기 절감 효과를 정량적으로 분석한다. 본 연구의 분석결과, 환경교육의 강화는 에너지 절감 및 쓰레기 절감에 부분적으로 긍정적인 영향을 미치는 것으로 나타났다. 구체적으로 환경교육이 집중적으로 이루어진 학생들 가정에서의 제 요금 및 학교에서 남기는 음식의 양이 일반적인 환경교육이 이루어지는 학생들 가정에서의 제 요금 및 학교에서 남기는 음식의 양보다 유의하게 낮은 것으로 나타난다. 본 연구의 결과는 에너지 절감 및 쓰레기 절감을 위해 환경시범학교 등과 같은 다양한 환경교육 정책의 강화가 필요하다는 것을 보여준다고 할 수 있다.

• 대한금속재료학회지
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• 제47권5호
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• pp.304-310
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• 2009

Recently, manganese nodule has been focused on alternative resources because of its high grade of noble metallic elements such as Co, Ni, and Cu etc. From the viewpoint of an optimization the operating variables for energy efficiency of smelting reduction process, thermodynamic model for smelting reduction process of Manganese nodule was developed by using energy and material balance concept. This model provided that specific consumption of pure oxygen and coke was strongly depended on post combustion ratio (PCR) and heat transfer efficiency (HTE). The dressing and dehydrating process of low grade manganese can be proposed an essential process to minimize the specific energy consumption with decreasing slag volume. The effect of electricity coal base smelting reduction process was also discussed from the energy optimizing point of view.