• Title/Summary/Keyword: Energy Economy

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A Study on the Optimization of a Renewable Energy System in Fire Station Buildings (소방서건물의 신재생에너지시스템 최적화에 관한 연구)

  • Lee, Yong-Ho;Hong, Jun-Ho;Cho, Young-Hum;Hwang, Jung-Ha
    • Journal of the Korean Solar Energy Society
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    • v.33 no.1
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    • pp.79-88
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    • 2013
  • This study set out to evaluate the economy, environmentality, and complexity (economy+environmentality) of fire station buildings of public service facilities and propose ways to apply the optimization of renewable energy system to fire station buildings. As for economy according to life cycle costs, economy increased when the application percentage of the geothermal and solar heat system increased over the three renewable energy system types (geothermal, solar heat, and solar photovoltaic). On the other hand, economy decreased when the application percentage of the solar photovoltaic system increased. As for environmentality according to tons of carbon dioxide, environmentality decreased when the application percentage of the geothermal and solar heat system increased. Environmentality increased when the application percentage of the solar photovoltaic system increased. As for complexity (economy+environmentality) according to the weighted coefficient method, complexity increased when the application percentage of the geothermal system increased. It was highest at the combination of the solar heat system (20%) and geothermal system (80%). On the other hand, complexity decreased when the application percentage of the solar photovoltaic system increased. It was lowest at the combination of the solar photovoltaic system (80%) and geothermal system (20%).

A Study on Safety Policies for a Transition to a Hydrogen Economy (수소경제로의 이행을 위한 안전관리 정책 연구)

  • Jun, Daechun
    • Journal of Hydrogen and New Energy
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    • v.25 no.2
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    • pp.161-172
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    • 2014
  • Hydrogen, which can be produced from abundant and widely distributed renewable energy resources, seems to be a promising candidate for solving the concerns for improving energy security, urban air pollution, and reducing greenhouse gas emissions. The two primary motivating factors for hydrogen economy are fossil fuel supply limitations and concerns about global warming. But the safety issues associated with hydrogen economy need to be investigated and fully understood before being considered as a future energy source. Limited operating experience with hydrogen energy systems in consumer environments is recognised as a significant barrier to the implementation of hydrogen economy. To prevent unnecessary restrictions on emerging codes, standards and local regulations, safety policies based on real hazards should be developed. This article studies briefly the direct impact-distances from hazard events such as hydrogen release and jet fire, and damage levels from hydrogen gas explosion in a confined space. Based on the direct impact-distances indicated in the accident scenarios and consumer environments in Korea, the safety policies, which are related to hydrogen filling station, hydrogen fuel cell car, portable fuel cell, domestic fuel cells, and hydrogen town, are suggested to implement hydrogen economy. To apply the safety policies and overcome the disadvantages of prescriptive risk management, which is setting guidance in great detail to management well known risk but is not covering unidentified risk, hybrid risk management model is also proposed.

The Impact of the Introduction of Hydrogen Energy into the Power Sector on the Economy and Energy (전력부문 수소에너지 도입의 경제 및 에너지부문 파급효과)

  • Lee, Sang-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.8
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    • pp.502-507
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    • 2016
  • The transition from a carbon economy based on fossil fuels to a hydrogen economy is necessary to ensure energy security and to combat climate change. In order to pursue the transition to a hydrogen economy while achieving sustainable economic growth, a preliminary study into the establishment of the necessary infrastructure for the future hydrogen economy needs to be carried out. This study addresses the economic and environmental interactions in a dynamic computable general equilibrium (CGE) model focusing on the economic effects of the introduction of renewable energy into the Korean energy system. Firstly, the introduction of hydrogen results in an increase in the investment in hydrogen production and the reduction of the production cost, ultimately leading to GDP growth. Secondly, the mandatory introduction of renewable energy and associated government subsidies bring about a reduction in total demand. Additionally, the mandatory introduction of hydrogen energy into the power sector helps to reduce CO2 emissions through the transition from a carbon economy-based on fossil energy to a hydrogen economy. This means that hydrogen energy needs to come from non-fossil fuel sources in order for greenhouse gases to be effectively reduced. Therefore, it seems necessary for policy support to be strengthened substantially and for additional studies to be conducted into the production of hydrogen energy from renewable sources.

Government support measures and the current situation in the renewable energy sector of Kazakhstan

  • Izbassov, Kairat
    • Bulletin of the Korea Photovoltaic Society
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    • v.6 no.1
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    • pp.76-85
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    • 2020
  • The Republic of Kazakhstan is a geographically large but sparsely populated country, rich in natural resources, located in the center of the Eurasian continent. In recent years, it has begun to create a green economy, leading it among its neighbors in Central Asia. Therefore, the country has set a clear goal: by 2030, emissions should be reduced by 15-25% compared to the level of the 90s. As part of the country green economy strategy, in 2013 Kazakhstan adopted the "National Concept for the Transition to the Green Economy until 2050", which sets out the principles of the green economy as a path for future development. The goal is to bring the share of renewable energy in electricity production from zero to 3% by 2020, and then increase it to 30% by 2030 and 50% by 2050. This paper looks at what Kazakhstan has done to promote renewable energy and provider perspectives. The paper also considers Kazakhstani legislation in terms of the development of renewable energy sources and provides information on incentives and preferences for the development of renewable energy sources. Thus, it will be easier for investors to evaluate the implementation of potential projects in Kazakhstan.

Impact of Community Investment Renewable Development Project on the Local Economy: Aspects of Residential Income and Local Company Revenue (주민참여형 재생에너지 개발의 지역경제 기여효과: 주민소득과 지역기업 매출을 중심으로)

  • Kim, Yunsoung;Yun, Seonggwon;Im, Hyunji;Yun, Taewhan
    • New & Renewable Energy
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    • v.17 no.1
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    • pp.61-75
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    • 2021
  • Power generation using solar PV and wind power are more feasible to compete with fossil fuel power generation. However, residential acceptance is still a big challenge in the deployment of renewable energy. The Korean government has implemented various policies to support the development of renewable energy in which communities invest. However, there are very few cases of the commercial operation of community-invested renewable energy power plants. Renewable energy has attracted attention in the reduction of greenhouse gasses (GHG) effects and economic feasibility. However, it is also necessary to focus on socio-economic effects to overcome the economic recession while reducing greenhouse emissions. Community-invested renewable energy development projects can positively revitalize the local economy in many aspects, such as resident income, job creation, and the growth of local businesses. This study analyzes the local economic impact of renewable energy development projects on residents' income and job creation. It increased local companies' sales through community-invested development projects in Korea.

A Study on the Infrastructure of All-electric Houses in the Viewpoint of Hydrogen Economy (수소경제 관점의 전기에너지주택 보급기반 구축에 관한 연구)

  • Hwang, Sung-Wook;Lee, Hyeon-Ju;Kim, Kang-Sik;Nah, Hwan-Seon;Kim, Jung-Hoon
    • Journal of Hydrogen and New Energy
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    • v.23 no.1
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    • pp.100-109
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    • 2012
  • In this paper, some ideas are proposed to establish the infrastructure of all-electric houses which are able to reduce primary energy consumption and $CO_2$ emission by adopting heat pump systems and induction heating cookers excluding the use of fossil fuel energy. This electrification concept is based on the consumption of only one type of energy which means electricity as secondary energy and the conventional fossil fuel energy is just consumed to generate electricity as primary energy. All-electric house is laid on the extension of the hydrogen economy in a long-term viewpoint so that the effectiveness of this new conceptual house is estimated analyzing the reduction of $CO_2$ emission. In this analysis, the balance of electricity supply and demand is considered including the construction of new power plants by renewable energy such as nuclear, IGCC and fuel cell because decarbonization is an essential element of hydrogen technology and economy and this action is accomplished in both supply and demand side of electricity. The results are able to contribute to develop various useful hydrogen policies and strategies and some detail researches are required previously to make the best application of this new conceptual house.

Fuel Economy of Ultracapacitor & Battery Hybrid vehicle Using Dynamic Programing (울트라케페시터와 배터리를 보조 에너지원으로 사용하는 하이브리드 자동차의 다이나믹 프로그래밍을 이용한 최적 연비 계산)

  • Jeon, You-Kwang;Park, Young-Il;Lee, Jang-Moo
    • 한국신재생에너지학회:학술대회논문집
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    • 2005.11a
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    • pp.537-540
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    • 2005
  • A battery is the primary energy source device presently used in hybrid electric vehicle. It can store much energy, but cannot provide enough current without inefficient units. However, an ultracapcitor can provide much current, but cannot store much energy. It will have better fuel economy by combining the two energy sources in parallel. The purpose of this paper is making the simulator of the two HEV systems. The one has only battery, the other have battery and ultarcapacitor in parallel. To compare the fuel economy, dynamic programing was used for optimization and prius was used for HEV model.

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A Study on Implementation Plan of Clean Hydrogen Certification System (청정수소 인증제 시행방안 연구)

  • RHEE, HAN WOO;KIM, JIN HO
    • Journal of Hydrogen and New Energy
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    • v.33 no.4
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    • pp.301-308
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    • 2022
  • The Hydrogen Economy Promotion and Hydrogen Safety Management Act (hereinafter referred to as the "Hydrogen Economy Act") stipulates matters related to certification and cancellation of clean hydrogen by grade, and requires those who produce, import, or sell clean hydrogen to report to the Minister of Trade, Industry and Energy. In order for this system to operate smoothly, the clean hydrogen Certification system must be designed to meet international standards, and the institution operating the System must have appropriate capabilities and foundations. The clean hydrogen certification system should serve as an opportunity for Korea's domestic energy industry to take a leap forward.

A Study on World Energy Outlook and the Optimal Alternatives for Energy Technology Development: Focusing on Coal Utilization Technology (에너지자원 수급 전망 분석 및 최적 기술 개발 대안에 관한 연구: 석탄활용기술 중심)

  • Lee, Seong-Kon;Kim, Jong-Wook;Yoon, Yong-Jin
    • 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.