• Transactions of the Korean hydrogen and new energy society
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• v.33 no.6
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• pp.660-673
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• 2022

In achieving carbon neutrality and the hydrogen economy, the estimation of H₂ cost is critical in terms of CCU technologies. This study analyzes LCOH of hydrogen produced by the carbon utilization unit with methane reforming and CO₂ from thermal power plant. LCOH for H₂ made with CO is estimated in three ways of Joint Cost Allocations with financial performance risk assessment. Regarding cost analysis, the zero value of LCOH is $6,003/ton. We found that the CCU technology has economic feasibility in terms of profitability. The sensitivity analysis result shows that the input ratio is more influential to the LCOH than other variables. Risk analysis presents the baseline price of zero value of LCOH - $8,408/ton, which is higher than the cost analysis - $6,003/ton. Mainly, the price variability of natural gas primarily affects the LCOH. The study has significant value in analyzing the financial performance risks as well as the cost of H₂ produced by a Plasma-based CCU system.

• Environmental and Resource Economics Review
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• v.31 no.4
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• pp.645-668
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• 2022

Hydrogen energy is emerging as an important means of carbon neutrality in the various sectors including power, transportation, storage, and industrial processes. Fuel cell power plants are the fastest spreading in the hydrogen ecosystem and are one of the key power sources among means of implementing carbon neutrality in 2050. However, high volatility in system marginal price (SMP) and renewable energy certificate (REC) prices, which affect the profits of fuel cell power plants, delay the investment timing and deployment. This study applied the real option methodology to analyze how the dual uncertainties in both SMP and REC prices affect the investment trigger price level in the irreversible investment decision of fuel cell power plants. The analysis is summarized into the following three. First, under the current Renewable Portfolio Standard (RPS), dual price uncertainties passed on to plant owners has significantly increased the investment trigger price relative to one under the deterministic price case. Second, reducing the volatility of REC price by half of the current level caused a significant drop in investment trigger prices and its investment trigger price is similar to one caused by offering one additional REC multiplier. Third, investment trigger price based on gray hydrogen and green hydrogen were analyzed along with the existing byproduct hydrogen-based fuel cells, and in the case of gray hydrogen, economic feasibility were narrowed significantly with green hydrogen when carbon costs were applied. The results of this study suggest that the current RPS system works as an obstacle to the deployment of fuel cell power plants, and policy that provides more stable revenue to plants is needed to build a more cost-effective and stable hydrogen ecosystem.

• 월간 기계설비
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• s.229
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• pp.43-54
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• 2009

본지는 그동안 태양광을 시작으로 지열, 풍력, 바이오, 수소연료전지, 소수력, 조력, 석탄가스화 등 다양한 신재생에너지에 대해 알아봤다. 신재생에너지는 기후변화협약, 환경규제 등에 대응할 수 있고 석유나 천연가스의 고갈에 대비한 에너지의 안정적 확보 차원에서 전세계의 관심사가 되고 있다. 국내에서도 신재생에너지 관련 기술개발 및 보급이 이뤄지고 있고 관련 기업들도 우후죽순 생겨나고 있다. 하지만 신재생에너지가 상용화되기 위해선 더욱 다양한 기술개발과 정부의 정책적 지원이 뒤따라야 한다. 설비건설업계도 지금 당장 신재생에너지 분야에서 수익을 창출할 수 없겠지만 앞으로의 건설분야 트렌드가 신재생에너지를 접목하는 방향으로 갈 수밖에 없어 신재생에너지에 대한 보다 많은 관심을 가져야 할 것으로 보인다. 이번 호에서는 그동안 다양한 신재생에너지에서 세부적으로 다루지 못한 부분과 이색적인 신재생에너지 제품 및 기술에 대해 살펴본다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.139-140
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• 2019

세계경제는 인류의 지속가능한 성장을 위해 2020년을 기점으로 저탄소 경제체제에서 무탄소(에미션 제로·Emission Zero) 경제체제로 변화를 꾀하고 있는 상황이다. 이러한 변화는 해운분야에서도 예외가 아니다. 국제해사기구에서 선박온실가스 규제라고 할 수 있는 에너지효율 규정이 해양오염방지협약 부속서 6의 제4장(에너지 효율관리)으로 2011년 개정·채택된 것을 시작으로 최근 2030년까지 40%감축, 2050년까지 50% 감축이라는 온실가스 감축목표를 설정하여 본격적인 온실가스 감축을 위해 노력하고 있다. IMO는 감축목표를 달성하기 위한 단기조치, 중·장기 조치를 2023년까지 완성한다는 목표를 설정하고 장애요인 분석, 국가별 영향평가, 역량강화 및 기술지원과 연구개발에 관한 로드맵을 포함한 최종 전략 수립을 진행하고 있으나 문제는 국제해사기구(IMO) 2030 온실가스 감축목표 달성은 현재 사용되고 있는 화석연료로는 불가능하기 때문에 선박추진 연료로써 수소, 연료전지, 메탄올 등 대체에너지 개발을 대폭 지원하는 국가의 정책전환이 시급하며 이를 구체화할 수 있는 정책개발이 시급하다.

• Journal of the Korean Institute of Gas
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• v.25 no.1
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• pp.1-6
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• 2021

Based on Korea's Hydrogen Economy Activation Roadmap, an annual supply of 5.26 million tonnes of hydrogen is required by 2040. But if the hydrogen production from byproduct, extraction, and electrolysis of water is not able to meet the target which is 50% of total production, it would be necessary to increase the portion of imported hydrogen. Therefore, it is essential to secure a variety of sources for overseas production. In this technical report, hydrogen production/transportation policies, current condition, and future prospects of Canada, a major supply candidate, is examined and an example of blue hydrogen project which is considered the most realistic hydrogen supply method is introduced.

• Journal of the Korean Institute of Gas
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• v.26 no.6
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• pp.59-64
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• 2022

Currently, 787 hydrogen tube trailer are in operation as of the end of October 2022, and a maximum of 340 kg is transported in a Type 1 seamless container at a pressure of up to 200 bar. The current safety management system and facility management are in good condition, but the system and facility structure improvement are needed to strengthen safety. Accordingly, this paper simulated and analyzed an accident case that occurred on the Daejeon-Dangjin highway on December 28, 2021 during the process of expanding the supply and operation of hydrogen tube trailer according to the hydrogen energy activation policy. Based on the results, suggestions were made on how to improve the safety of hydrogen tube trailer.

• Transactions of the Korean hydrogen and new energy society
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• v.19 no.6
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• pp.552-560
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• 2008

In 1997, Korean government established the National Energy and Resources Plan, which targeted from 1997 to 2005 with strategic energy technology development. At the end of 2005, Korean government built a New National Energy and Resources Plan preparing for upcoming 10 years from 2006 until 2015 based on energy technology trees comparing with the previous plan, which based on the energy R&D projects. In this research, we prioritize the relative preferences and efficiency by an AHP/DEA CCR-I and BCC-I integrated model approach considering scale efficiency for well focused R&D and efficiency of developing Greenhouse Gas technologies as an extended research from a view point of econometrics as an extended research.

• Journal of Energy Engineering
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• v.15 no.3 s.47
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• pp.174-180
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• 2006

The trend and outlook of energy supply and demand have an crucial effect on not only energy sector but also korean economy due to the rapid change of energy environments with continuous high oil price such as dubai crude oil price of above $60 a barrel. Specifically, korea is the 9th largest energy consuming nation in the world and the 97 percentages of energy import totally depends on the import of energy resources in korea. Korean economy is influenced directly by the trend and outlook of world energy on account of that. Moreover, Should korea be the annex 1 country having responsibility for reducing its greenhouse gas emissions to 1990 levels by the year 2000, in 2013, The effectuation of united nations framework convention on climate change will affect korean economy severely. In this study, we analyze the supply and demand of primary energy resources such as petroleum, coal, and natural gas. we then suggest the optimal alternatives of energy technology development that play an important part, which will be a temporary bridge, in going forward with hydrogen economy in the aspects of energy policy.

• 월간 기계설비
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• no.11 s.220
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• pp.29-37
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• 2008

최근들어 국제 유가가 급등하고 지구 온난화 등 환경문제가 부각되면서 기존의 에너지를 대체하는 대안으로 신재생 에너지가 전 세계적으로 뜨거운 이슈로 떠오르고 있다. 더구나 온실가스 감축 등 본격적인 환경경제 시대가 도래하면서 환경친화적이고 고갈 염려가 없는 신재생에너지가 효과적인 대안으로 주목받고 있다. 또한 고유가 및 기술개발 가속화도 신재성에너지 시장 확대를 부채질하고 있어 신재생에너지에 대한 관심이 신성장동력으로 집중되고 있다. 이처럼 환경문제 해결에 대한 관심은 '선택'이 아닌 '필수'가 되었다. 우리나라도 국가 차원에서 이산화탄소 배출을 줄이기 위해 '저탄소 녹색성장' 정책을 마련하면서 신재생에너지 확대 보급을 위한 제도 및 대책이 새롭게 마련되고 있다. 건설산업은 대표적인 에너지 다소비업종에 속하기 때문에 이산화탄소 저감을 위해 에너지 저소비형 건축물 연구에 많은 투자를 하고 있으며, 신재생에너지를 이용한 생태토시 조성 등에 노력을 기울이고 있다. 특히 에너지를 다루는 기계설비는 이러한 신재생에너지와 밀접한 관련이 있기에 더욱 관심을 기울이고 있다. 태앙광을 비롯하며 지열, 풍력, 바이오 등 신재생에너지 개발은 물론 빗물이용 시스템 쓰레기 이송 설비와 같은 첨단과 환경이 조화를 이루는 아파트의 보급도 차츰 늘어나고 있는 추세다. '누구의 영역도 아닌' 곳이자 '누구의 영역도 될 수 있는' 신재생에너지가 설비건설업계에 확대, 보급되기 위해서는 설비건설업계의 관심이 집중되어야하며, 기술개발을 활발히 하여 선점경쟁에서 유리 한 고지를 접할 수 있을 것이다. 그렇다면 국내 신재생에너지의 개발 수준은 어디까지 왔을까? 이번 호는 그 현황을 집중 조명해 보고, 다음 호에는 풍력, 바이오에너지, 지열, 연료전자 수소 등을 하나씩 분석해 본다.

• Journal of the Korean Institute of Gas
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• v.25 no.2
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• pp.28-33
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• 2021

With the recent growing interest in eco-friendly cars, as interest in eco-friendly cars increases, interest and purchase of hydrogen fuel cell vehicles that do not emit pollutants are increasing. Recently, the government is supporting the expansion of hydrogen charging station and localization of core parts according to the government's hydrogen energy dissemination policy. In this study, the flow characteristics of the hydrogen flow control valve were investigated. As the differential pressure increases, the mass flow rate and flow coefficient tend to be different from the volume flow rate. And it was confirmed that it affects the hydrogen temperature due to the nozzle effect in the bottleneck section, and the change in density affects the mass flow rate.