• The Magazine for Energy Service Companies
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• s.53
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• pp.24-27
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• 2008

축열식연소장치로 업계에서 두각을 나타내고 있는 (주)테크윈(대표 정붕익)이 태양광발전과 보안등기구 등으로 사업영역을 확대하고 있어 주목된다. 테크윈의 에너지사업부는 신재생에너지, 에너지진단, ESCO사업으로 올 상반기 매출만 100억원을 기록하는 등 급속히 성장하고 있다. 테크윈은 이를 계기로 국내 최고의 에너지 토탈 솔루션을 제공하는 기업으로 재도약을 다짐하고 있다.

• The Magazine for Energy Service Companies
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• s.2
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• pp.20-23
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• 2000

정부과천청사는 에너지 사용량이 많고 절약효과가 클 것으로 기대되어 지난 97년 정부의 국가에너지절약추진 대책의 일환인 ESCO사업 시범 대상기관으로 지정되었다. 사업추진기관인 행정자치부 과천청사관리소는 기존의 사업과는 다른 ESCO사업의 성격으로 인해 시행 이전 많은 논란과 애로사항을 겪기도 했으나, 공공기관 최초로 조명기기 교체를 통한 ESCO사업을 실시해 정부시책에 적극적으로 동참하고 에너지절약에도 앞장서고 있다는 평가를 받고 있다.

• The Magazine for Energy Service Companies
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• s.70
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• pp.34-39
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• 2011

2011년도 에너지이용합리화자금은 "2011년 에너지이용합리화사업을 위한 자금지원지침"(지식경제부공고 제2011-81호)에 근거하여 본고와 같이 추진중에 있다. ESCO투자사업 정책자금은 매월 단위로 신청가능하며 자금신청자의 공인인증서를 이용하여 에너지관리공단 홈페이지를 통해 자금추천 신청이 가능하다.

• The Magazine for Energy Service Companies
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• s.42
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• pp.26-27
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• 2006

산업자원부가 주최하고, 에너지관리공단이 주관한 '2006 에너지전시회'가 지난 9월26일부터, 5일간 서울 삼성동 코엑스(태평양홀)에서 열렸다. 에너지절약 신기술과 고효율 에너지기자재 보급을 위한 이번 전시회는 역대 사상 최대 규모인 19개국, 200개업체가 참가했으며, 전시회 기간 중 협회, 학회, 기업체 등 27개 관련기관에서 진행한 185회의 세미나가 열렸다.

• Transactions of the Korean hydrogen and new energy society
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• v.33 no.6
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• pp.786-794
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• 2022

Green ammonia is a promising renewable energy carrier. Green ammonia can be used in various energy conversion devices (e.g., engine, fuel cell, etc.). Ammonia has to be fed with hydrogen for start-up and failure protection of some energy conversion devices. Ammonia can be converted into hydrogen by decomposition and partial oxidation. Especially, partial oxidation has the advantages of fast start-up, thermally self-sustaining operation and compact size. In this paper, thermodynamics, start-up and operation characteristics of ammonia partial oxidation were investigated. O₂/NH₃ ratio, ammonia flow rate and catalyst volume were varied as operation parameters. In thermodynamic analysis, ammonia conversion was maximized in the O₂/NH₃ range from 0.10 to 0.15. Ammonia partial oxidation reactor was successfully started using 12 V glow plug. At 0.13 of O₂/HN₃ ratio and 10 LPM of ammonia flow rate, ammonia partial oxidation reactor showed 90% of ammonia conversion over commercial Ru catalyst. In addition, Increasing O₂/NH₃ ratio from 0.10 to 0.13 was more effective for high ammonia conversion than increasing catalyst volume at 0.10 of O₂/NH₃.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.39 no.5
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• pp.499-505
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• 2015

To properly design and assess a piezoelectric vibration energy harvester, it is necessary to consider the application of an efficiency measure of energy conversion. The energy conversion efficiency is defined in this work as the ratio of the electrical output power to the mechanical input power for a piezoelectric vibration energy harvester with an impedance-matched load resistor. While previous research works employed the electrical output power for approximate impedance-matched load resistance, this work derives an efficiency measure considering optimally matched resistance. The modified efficiency measure is validated by comparing it with finite element analysis results for piezoelectric vibration energy harvesters with three different values of the electro-mechanical coupling coefficient. New findings on the characteristics of energy conversion and conversion efficiency are also provided for the two different impedance matching methods.

• Journal of Korea Foresty Energy
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• v.25 no.1
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• pp.31-38
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• 2006

Quercus mongolica is the most common hardwood species distributed in Korea. This study was conducted to investigate the biomass and energy content of the belowground biomass of Q. mongolica and to obtain the regression equation for estimating root biomass using the tree height and diameter at breast height (DBH). A total of 18 sample trees ranging 20 to 60 year-old were selected in the study sites. Tree height, DBH, age, and weight of stemwood, sapwood, heartwood, stembark, branch, leaf, and root were measured for total biomass. The highly positive correlation was shown between the biomass of most of variables of aboveground components and root biomass. The regression equation of the aboveground total biomass was $log\;W_A\;=\;1.469\;+\;0.992\;log\;D^2H\;(R^2 =0.99)$. The regression equation of the belowground biomass was $log\;W_R\;=\;1.527\;+\;0.808\;log\;D^2H\;(R^2\;=\;0.97)$. The mean energy contents of sapwood, heartwood, bark, leaf, and root were 19,594 J/g DW, 19,571 J/g DW, 19,999 J/g DW, 20,664 J/g DW, and 19,273 J/g DW, respectively. The results obtained from this study can be used to estimate biomass and energy content of belowground using easily measurable variables such as DBH and tree height ranging from 20 to 60-year-old Q. mongolica stands.

• Journal of Energy Engineering
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• v.26 no.4
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• pp.92-99
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• 2017

In Korea, the zero energy building was designated as the 7 new industries in the Ministry of Land and the 8 new industries in the Ministry of Industry. In order to maximize the insulation performance of the building envelope, improve the efficiency of building equipment, We are aiming. It is necessary to analyze the energy requirements of the buildings (cooling, heating, hot water supply, lighting, ventilation) of buildings with energy efficiency level of 1++ which is equivalent to the zero energy building certification system in Korea, It is aimed to be used as basic data for the advancement of energy building certification system. Zero Energy Building certification is estimated to be 61 buildings by 2017, and the approximate reference value and the first energy requirement for each of the five loads are calculated considering passive and active aspects. It is difficult to say that it is a clear standard because there is a small sample of data for calculating the load standard. However, it is necessary to interpret various methods in order to upgrade the Zero Energy Building certification standard in the future.

• Journal of Environmental Science International
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• v.28 no.11
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• pp.983-991
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• 2019

This study investigated the use of a hydroxyl-radicals-generated microbubble/catalyst (MB/Cat) system for removing organic pollutants, nitrogen, and phosphorous from liquid fertilizer produced by livestock wastewater treatment. Use of the MB/Cat system aims to improve the quality of liquid fertilizer by removing pollutants originally found in the wastewater. In addition, a reduction effect has been reported for antibiotics classified as representative non-biodegradable matter. Samples of liquid fertilizer produced by an aerobic biological reactor for swine wastewater treatment were first analyzed for initial concentrations of pollutants and antibiotics. When the MB/Cat system was applied to the liquid fertilizer, TCOD, TOC, $BOD_5$, and $NH_3-N$, and $PO_4-P$ removal efficiencies were found to be approximately 52%, 51%, 30%, 21%, and 66%, respectively. Additionally, Amoxicillin hydrate was removed by 10%, and Chlortetracycline HCl and Florfenicol were not present at detectable levels These findings confirm that the MB/Cat system can be used with livestock wastewater treatment to improve liquid fertilizer quality and to process wastewater that is safe for agricultural re-use.

• Korea Petroleum Association Journal
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• no.3 s.73
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• pp.6-7
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• 1987

이 자료는 지난 3월 5~6일 양일간 일본 동경에서 외무성과 통산성의 공동 주최로 열린 제2회 태평양지역 에너지협력회의에서 이봉서동력자원부 차관이 행한 영문발표문을 번역한 것이다. (편집자 주)