• 월간 기계설비
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• s.239
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• pp.52-60
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• 2010

에너지 다소비 시설인 하수처리시설이 녹색기술을 도입해 에너지 사용량은 줄이고 청정에너지를 생산하는 에너지 독립시설로 탈바꿈한다. 환경부는 최근 하수처리시설에 고효율 에너지 설비 재생에너지이용 설비 등을 설치해 2030년까지 3단계에 걸쳐 에너지자립율 50% 달성 등의 내용을 골자로 하는 '하수처리시설 에너지자립화 기본계획'을 확정 발표했다. 환경부에 따르면 하수처리시설은 하수처리 과정에서 소화가스, 소수력, 하수열 등을 이용할 수 있을 뿐만아니라 하수처리시설물의 넓은 부지를 활용한 태양광 풍력발전이 가능하다는 것. 이에 따라 환경부는 올해부터 소화가스, 소수력발전, 에너지절감 설비, 태양광 풍력발전설비를 도입해 에너지 자립율을 2015년 18%에 이어 2020년 30%, 2030년 50%까지 끌어올린다는 방침이다. 본지는 지난호에 이어 이번호를 끝으로 연재를 마친다.

• Fire Science and Engineering
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• v.24 no.2
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• pp.139-144
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• 2010

An experimental study has been carried out to investigate the possibilities of an industrial $N_2$ generator that it replace Halon series as a natural extinguishing system. And this study comparison design standard of gas series extinguishing system with natural extinguishing system. We manufactured simple protected enclosure for analyzing fire-extinguishing performance of the $N_2$ generator. As a $N_2$ gas is exhausted on protected enclosure, a various of Oxygen concentration is measured to analyze fireextinguishing performance experimentally. The results, in case of $100m^3$ protected enclosure and $5m^3$/min $N_2$ flow rate, the Oxygen concentration is decreased below 15% within 3 minutes. And so, the $N_2$ generator make full use of an suffocating extinguishing system.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2002.05a
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• pp.21-29
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• 2002

With regard to the personnel safety and other safety when the gas suppressants are discharged into the area where occupants exist, the short term and long term effects to the health of people are discussed mainly with the Carbon dioxide agent and Halon Replacement agents system. To gain the benefits of CO2 extinguishing systems while minimizing risk to people serious attention must be given to personnel safety in the design, installation, and maintenance of CO2 systems. Training of personnel is essential. A major factor in the use of a clean agent fire suppressant in a normally occupied area is toxicity. While all halocarbon agents are tested for long-term health hazards, the primary endpoint is acute or short-term exposure, The primary acute toxicity effects of the halocarbon agents described here are anesthesia and cardiac sensitization. For inert gases, the primary physiological concern is reduced oxygen concentration.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2004.11a
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• pp.168-174
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• 2004

• Journal of Korean Institute of Fire Science & Engineering
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• v.1 no.1
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• pp.2-9
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• 2000

• Fire Science and Engineering
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• v.29 no.5
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• pp.51-56
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• 2015

In this study, optimal design methods were applied to the agent discharge flow of clean agent fire extinguishing systems. The methods combined optimal design theory and engineering theory for engineering analysis in a design program or coast savings in value engineering. Optimal design parameters were determined to optimize the agent discharge flow based on the design theory of the clean agent fire extinguishing systems and the theory of optimal design. The design factors were verified in regard to suitability for the performance of fire extinguishing systems. The results provide a foundation for optimal design method methods in other fire extinguishing systems. Optimization of the agent discharge flow of the discharge nozzle was confirmed by the constraints on the inner diameter of the discharge nozzle and the pipe, agent arrival time, flow, and pressure variation of the agent. The deviation of discharge pressure and agent time of the agent discharge nozzle were found to correlate with the pressure variation.

• Journal of the Korea Organic Resources Recycling Association
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• v.26 no.2
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• pp.85-93
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• 2018

Semi-dry anaerobic digestion experiment using dairy cattle manure collected from dairy cattle house was conducted to analyze efficiency of biogas production. As a first experiment, Biochemical Methane Potential (BMP) test was carried out according to certain ratio of sample mixtures: dairy cattle manure, pig slurry, and mixture of dairy cattle manure and pig slurry. The amount of methane accumulated during BMP test period was high in the experimental groups containing dairy cattle manure. As a second experiment, semi-dry anaerobic digestion experiment was carried out using only the dairy cattle manure collected from floor of the dairy cattle house. Judging from the experimental results, the optimum hydraulic retention time (HRT) of semi-dry anaerobic digestion for dairy cattle manure containing 13% of TS was 25 days. The amount biogas generated from the semi-dry anaerobic digestor with the TS of 13% of the dairy cattle manure ranged from 1.36~1.50v/v-d and the average was 1.44v/v-d. The optimum HRT of the semi-dry anaerobic digestor for dairy cattle manure containing TS of 15% and the semi-dry anaerobic digestor for dairy cattle manure containing TS of 17% was the same as 30 days. The amount biogas generated from the semi-dry anaerobic digestor with the TS of 15% of the dairy cattle manure ranged from 1.42~1.52v/v-d and the average was 1.47v/v-d. The amount biogas generated from the semi-dry anaerobic digestor with the TS of 17% of the dairy cattle manure ranged from 1.50~1.61v/v-d and the average was 1.55v/v-d.

• Journal of Korea Port Economic Association
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• v.40 no.2
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• pp.137-155
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• 2024

To achieve the national goal of "2050 Carbon Neutrality" in the era of the climate crisis, it is important to support the decarbonization of ports, which are the vital node of the global supply chain. Following the establishment of the concept of port's decarbonzation, this study reviewed the obstacles and solutions to port decarbonization through literature research. Furthermore, the goals and strategies for decarbonization implementation of world major ports were examined through case analysis, and the level of decarbonization implementation of the five Korean major ports was quantitatively evaluated using a performance-based score measurement method. As a result of the analysis, the level of decarbonization of Korean ports is generally far behind that of advanced countries. In particular, measures for environment-friendly inland transportation, future alternative fuel bunkering facilities, and various market-based incentive policies are needed. As a policy task for the decarbonization of Korean ports, first, the necessity of establishing a emission inventory, monitoring, and reporting system and the disclosure of related information, second, the mixing strategy of various greenhouse gas reduction measures, and third, the increase in the proportion of renewable energy at ports were suggested.

• 한국신재생에너지학회:학술대회논문집
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• 2010.06a
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• pp.215.2-215.2
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• 2010

지구온난화의 주범으로 알려진 $CO_2$의 대기 중 농도는 산업혁명 이전 280ppm에서 산업 혁명 이후 375ppm으로 증가하였다. 정부 간 기후변화패널(IPCC)의 기후변화 시나리오에 의하면, 지금부터 다양한 감축노력을 한다 할지라도 $CO_2$ 증가추세는 계속되어 2100년경에는 대기 중 $CO_2$농도가 600~950ppm에 이를 것으로 예측하고 있다. 현재까지 화력발전부분은 온실가스($CO_2$)의 최대 배출 원으로 알려져 있으며 이 분야의 $CO_2$ 회수기술은 연소 후 포집(Post-combustion), 순산소 연소(Oxy-fuel combustion), 연소 전 탈탄소화(Pre-combustion) 3가지로 크게 구분된다. 이중 석탄가스화복합발전(IGCC)기술과 연계하여 $CO_2$를 회수할 수 있는 방법이 연소 전 탈탄소화 기술이다. 핵심기술은 $CO_2$ 분리공정으로 적용 될 수 있는 기술로서는 흡착 흡수법, 막분리법 그리고 가스 하이드레이트가 있으나 아직까지 우리나라의 가스 하이드레이트 기술은 전무한 형편이다. 본 연구에서는 가스 하이드레이트 형성원리를 이용하여 정온 정압 조건에서 $CO_2/H_2$ 하이드레이트를 제조하였으며 특히, 하이드레이트 형성 촉진제인 TBAB(Tetra-n-butyl ammonium bromide)를 첨가하여 TBAB 농도에 따른 상평형 및 속도론 실험을 수행 하였다. 또한 라만 분석을 통하여 $CO_2$ 회수 분리에 대한 연구도 병행하였다.

• Journal of the Korea Organic Resources Recycling Association
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• v.21 no.4
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• pp.62-71
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• 2013

This study was carried out to develope a pre-treatment technology for anaerobic digestion. Breaking down large particles into smaller particles enhances the performance of anaerobic digestion by increasing the hydrolysis of particles. A degree of hydrolysis is the most important factor determining the overall efficiency of methane production. Three types of pre-treatment devices (blade-type crusher, ozonization system, cavitation system) were set up and operated to crush solids in pig slurry in order to enhance biodegradability. The effect of pre-treatment on decreasing granular size within pig slurry by three experimental devices were compared. The highest performance of granulization of pig slurry was attained in a combination of blade-type crusher and ozonization system. In batch experiment, there was an improvement of the methane potential by combined pretreatment with crusher and cavitation. In case of pre-treated slurry, biogas and methane production were 325.9 L and 59.7% respectively, while, in untreated slurry, the production were lower; 298.8 L and 55.7%, respectively. These results indicate that higher anaerobic digestion efficiency of pig slurry can be obtained through the pre-treatment.