• 한국수소및신에너지학회논문집
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• 제33권6호
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• pp.616-622
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• 2022

At the present time, interest in hydrogen is increasingly growing worldwide to tackle climate change. Korea also takes an action by announcing the first hydrogen economy implementation basic plan with the import targets of 22.9 million tons of hydrogen from oversea in 2050. To achieve this plan, it is very essential to establish an overseas hydrogen supply chain. In this paper, the study estimates the import price for hydrogen into basic scenario and comprehensive scenario, and also analyses economic feasibility considering price of the each technology.

• 한국수소및신에너지학회논문집
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• 제35권4호
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• pp.460-467
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• 2024

As the hydrogen economy receives attention, much research has been conducted on water electrolysis that can produce green hydrogen. After investigating the various risk factors that exist in the alkaline water electrolysis process through hazard and operability study and job safety analysis, which are risk assessments, measures to ensure safety were prepared and made into a manual. Possible risks that could occur during various emergency stop situations and operations were identified, and leakage of potassium hydroxide (KOH) and hydrogen used as electrolyte appeared to be the main risk. If you utilize a risk assessment for the relevant equipment when writing a manual, you will be able to prepare work procedures that substantially reduce risk factors.

• 에너지공학
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• 제22권3호
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• pp.250-261
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• 2013

현대 사회에서 우리는 주로 화석 연료 인프라 위에 구축된 화석 연료 경제 시대에 살고 있다. 그 결과 발생하는 에너지 도전문제(예: 화석 연료의 자원 고갈 문제, 환경 오염 문제, 에너지 안보 문제)로 지속가능 발전은 한계에 부딪히고 있는 실정이다. 이들 도전문제를 극복하기 위해 기존 석유-기반 리파이너리, 즉 석유 정제(ORF) 역할을 대체할 바이오에너지(예: 바이오연료, 전기, 열) 및 바이오케미컬 (예: C5 계열, C6 계열) 동시-생산 시스템으로 바이오매스를 사용한 바이오리파이너리(BRF) 개념이 새롭게 출현하였다. 이는 석유 경제에서 바이오경제로 패러다임 천이(shift)가 진행되고 있음을 가리키는 지표(indicator)가 된다. 이러한 바이오매스-기반 경제는 현재 구축되어 있는 ORF 인프라를 거의 변경 없이 그대로 활용할 수 있는 높은 호환성, 적은 폐기물 발생량, 이산화탄소 중성적 친환경성, 지역 농업/임업 경제 활성화 등과 같은 매력적인 강점들을 갖고 있다. 무엇보다도 석유 자원 빈곤국이 고 석유 수입국이며 ORF 인프라를 이미 구축한 우리나라에서는 에너지 안보 및 지속가능 발전 측면에서 고가치 BRF 시스템의 연구 개발 및 기술 사업화에 국가적 차원에서 아낌없이 투자와 지원을 제공해야 할 필요성이 높아지고 있다. 이 연구에서는 바이오에너지/바이오케미컬 동시-생산용 시스템으로 활용될 BRF 기술의 국내외 동향을 소개하고자 한다.

• 한국수소및신에너지학회논문집
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• 제34권2호
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• pp.100-112
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• 2023

This study evaluated the contribution of carbon neutrality by calculating the carbon reduction amount and reduction intensity targeting the hydrogen pilot city and applying it to the carbon neutral reduction target. In the building sector, the reduction amount for 2030 was 10.8% on average. In addition, by 2050, the contribution to carbon neutrality of plan A was 14.1% on average, and the contribution to carbon neutrality of plan B was 15.1% on average. In the 2030 reduction amount of the transportation sector, the contribution to carbon neutrality was 138.4% on average. In addition, by 2050, the contribution to carbon neutrality in plan A was 82.5% on average, and the contribution to carbon neutrality in plan B was 74.9%. From the above research results, additional carbon reduction is possible when creating a hydrogen city, so it will be used as a basis of city-level carbon neutral model. It will also be used as a basis for technology development and investment promotion for various hydrogen supply methods in the future.

• Nuclear Engineering and Technology
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• 제39권2호
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• pp.111-122
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• 2007

The current energy supply system is burdened by environmental and supply problems. The concept of a hydrogen economy has been actively discussed worldwide. KAERI has set up a plan to demonstrate massive production of hydrogen using a VHTR by the early 2020s. The technological gap to meet this goal was identified during the past few years. The hydrogen production process, a process heat exchanger, the efficiency of an I/S thermochemical cycle, the manufacturing of components, the analysis tools of VHTR, and a coated particle fuel are key areas that require urgent development. Candidate NHDD plant designs based on a 200 MWth VHTR core and I/S thermochemical process have been studied and some of analysis results are presented in this paper.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2007년도 춘계학술대회
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• pp.742-746
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• 2007

Energy environment has been changing rapidly such as high oil prices and the effectuation of UNFCCC. Oil prices have continued to rise and Dubai crude prices recorded 60 or 70 dollars per barrel in 2006. In addition, the effectuation of UNFCCC will affect Korean economy and national energy security. Korea is the 9th $CO_2$ emissions country and takes the 1st place related to the increase rate of $CO_2$ emissions globally. Energy technology development is a key breakthrough and one of the optimal alternatives to cope with national energy security. In this study, we prioritize energy technologies in the sectors of high oil prices and UNFCCC related to ETRM for well focus R&D and efficiency of finite resources allocations. We applied to the extended method of AHP, fuzzy AHP reflecting the fuzziness of human thoughts and perception, for prioritizing the relative importance among energy technologies in ETRM for the first time as we make an energy policy in Korea.

• International Journal of Air-Conditioning and Refrigeration
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• 제17권1호
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• pp.15-24
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• 2009

The energy usage and the economical feasibility of the typical two story office building in the three urban locations of South Korea are evaluated as the eight orientations. The smallest energy consume is shown at the true south. The ranges of the low energy consume are $-3l5^{\circ}{\sim}0^{\circ}\;and\;-135^{\circ}{\sim}-180^{\circ}$. There are obvious advantages of passive solar designs such as using a fully glazed facade at the true south in the building. The General Low voltage plan is the effective way for the office building when does not required the high voltage electricity. The energy cost of KEPCO is compared to that of XCEL ENERGY. The portion of the customer charge of XCEL ENERGY is about 10% but it is about 50% of the total tariff of KEPCO. The effective way to save the energy cost is by reducing the operating energy of XCEL ENERGY plane but the most effective way is reduce the contracting energy of KEPCO plane.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 추계학술대회 초록집
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• pp.165.1-165.1
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• 2010

In the past, drivers bought a fuel additives to treat a combustion chambers or injector nozzles for carbon or gum deposit at market. But, nowadays, as raised cost of fuel for a vehicle the consumers also start focusing on a function of fuel additives that increases fuel economy of one. Some fuel additive manufacturers and agents advertise that their goods make a car it's initial state. This paper shows data for 3 years that were acquired during test for registration of an additive in domestic. The data were sorted according to kind of vehicle, kind of fuel, test mode, CO, HC, NOx, PM, total emission, fuel economy and accumulated mileage. And than by using simple linear regression analysis changes according to accumulated mileage was displayed. Normal distribution and histogram of rate of increase and decrease were displayed. the analyzed data indicated that a fuel additive maintain and make a car the first state of one but can't make a car be batter than initial the one.

• 한국자동차공학회논문집
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• 제15권1호
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• pp.16-22
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• 2007

Fuel efficiency is one of the major issues in regard to energy and environment. As customers desire more comfortable vehicles, increase of accessory traction force is necessary. Air conditioning system (ACS) consumes the biggest traction force among accessories, especially during summer. This means ACS is the primary object deteriorating fuel economy among accessories. Since direct measurement of traction force and fuel consumption in practical vehicle is difficult, comparison analysis is taken between vehicle with and without ACS working. For this comparison, real time measurements are carried out to know ACS traction force and fuel consumption. As a result of the comparison, a vehicle without ACS operation was 15.92% superior to a vehicle with ACS operating. It could be used as a fundamental material for improvement ACS for better fuel efficiency.

• 동아시아경상학회지
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• 제10권1호
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• pp.11-21
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• 2022

Purpose - Beginning from the formation of the two governments, South and North Korea in 1948, North Korean collective economy as per trade in exchange strategies with right of way employed on heavy and chemical companies, against the external concerned with South Korean selling economy. This study aims to provide solutions for the joint economic prosperity of South and North Korea in the future. Research design, Data, and methodology - This study adopted a qualitative content analysis research method. This research method focuses on themes and concepts that are present in previous literature. This method seeks to derive relationships and meanings by analyzing themes and concepts within existing data. Result - According to qualitative textual analysis, the findings indicate that there are total seven solutions to lead the joint economic prosperity of South and North Korea (Technology Innovation, Energy and Construction, Construction companies and the Gulf market; Oppression via negotiation, Sports and Culture, Agenda-setting and Framing; Competition System). Conclusion - The Korean Government's association strategies outlines tackled in this study are uniform to each other because they are phased, peaceful, regular, and well-designed. But there were situations in which diminutive tenure North Korea approaches was enlisted beyond medium-to-lasting-period union strategies. North Korea should allow a free market whereby its citizens can freely trade among themselves and other people from South Korea.