• Nuclear Engineering and Technology
• /
• v.44 no.4
• /
• pp.429-436
• /
• 2012

Critical heat flux (CHF) is the thermal limit of a phenomenon in which a phase change occurs during heating (such as bubbles forming on a metal surface used to heat water), which suddenly decreases the heat transfer efficiency, thus causing localized overheating of the heating surface. The enhancement of CHF can increase the safety margins and allow operation at higher heat fluxes; thus, it can increase the economy. A very interesting characteristic of nanofluids is their ability to significantly enhance the CHF. Nanofluids are nanotechnology-based colloidal dispersions engineered through the stable suspension of nanoparticles. All experiments were performed in round tubes with an inner diameter of 0.01041 m and a length of 0.5 m under low pressure and low flow (LPLF) conditions at a fixed inlet temperature using water, 0.01 vol.% $Al_2O_3$/water nanofluid, and SiC/water nanofluid. It was found that the CHF of the nanofluids was enhanced and the CHF of the SiC/water nanofluid was more enhanced than that of the $Al_2O_3$/water nanofluid.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.28 no.8
• /
• pp.1088-1099
• /
• 2004

This study looked into the features of the consumers who positively reuse the clothing through their actual exchanges at second-hand clothing stores. The findings indicate that it shows the features of the consumers who perform the environmental activities by treating the clothing to be actually left unused, in an environmentally-friendly way, and that it may present the programs that will be able to create more consumers on the basis of its findings. The study used the questionnaire method, and the subjects were selected among those who have the experience of buying the second-hand clothing. The findings are as follows. 1. The major users of Green stores were found to be many among the females in their forties by the age, with 2 million Won or more by the income, of the graduates of high school or higher by the educational background, or of the housekeepers with children by the job. 2. The practices for the Green store utilization showed the highest ratios in one or two times of uses a month, one to four pieces of purchases a month, female clothing by the article, or trousers by the purchasing item. 3. As for the level of satisfaction after the clothing purchase at green stores, 70 percent of the respondents were satisfied, and the high ratios were seen with "the price was very low" or "since it seemed to support the environmental issues" by the reason for the satisfaction. 4. The findings on the clothing attitudes by the green store users showed fashion and social status symbol (factor 1), feminine modesty (factor 2), convenience (factor 3), alignment (factor 4), and economy (factor 5).

• KDI Journal of Economic Policy
• /
• v.34 no.4
• /
• pp.1-26
• /
• 2012

Greenhouse gas emission policy in Korea and elsewhere is based on emissions projections, a key element of which is the projected path of structural change from high productivity growth to low productivity growth economic sectors given sector specific labor productivity growth, emissions abatement across sectors and population growth. Thus, it is important to model the source of the structural change to forecast emissions correctly. Using data for the Korean economy, this study constructs and quantitatively evaluates a model of structural change and green growth to generate policy implications for Korea and the international greenhouse gas debate.

• Proceedings of the KSR Conference
• /
• 2005.05a
• /
• pp.971-978
• /
• 2005

21century world is changing by leaps and bounds and this among one of new issue ready front environment be. Specially, the human social economy enemy, current of change is already happening even if there is in traffic industry that back activity. That is, point that railroad has competitive power and comparative advantage than other transportation until transportation system construction that is environment-friendly as part of country comparative power strengthening is embossed newly. On this time, railroad reached time that environment management that it is applied that is environment-Paradigm over management whole as well as field of technology such as construction and rolling stocks is necessary. This paper wishes to grope plan that introduce this in railroading hereafter by examining necessity introduction in railway operation through environment marketing example. It must go to Ready front Green-railway.

• Journal of the Korean Professional Engineers Association
• /
• v.42 no.2
• /
• pp.35-40
• /
• 2009

This article is summary of 'Korean Green New Deal' project which strives to revive Korea's Top 4 rivers for the next four years, between 2009 and 2012. The purpose of this project is balanced national development and recovered regional economy, creating new jobs. Details of the 'Korean Green New Deal' include means to reinforce obsolete embankments and to recover the river ecosystem by maintaining sedimentary soil, to install small- to middle-sized dams and flood control reservoirs and to establish eco-friendly reservoir for emergency water supplies. The project is expected to generate 190,000 new employee and create 23 trillion won worth production inducement effect, contributing in the revival of regional economies.

• 한국신재생에너지학회:학술대회논문집
• /
• 2009.11a
• /
• pp.289-292
• /
• 2009

This paper reviewed laws and policies of renewable energy in Japan and China. Japan has enacted laws and implemented policies of renewable energy since 1980 for their energy security and environmental problem, and nowadays renewable energy is one of solutions for UNFCCC and Kyoto Protocol. Japan plays a leading role in photovoltaic power generation. As second largest energy consumer, China generates a lot of pollution from their energy use. However Chinese government attempts to sustainable development among economy, society and environment, suggests to use renewable energy in the way to reduce pollution and improve living standards. Korea focused on renewable energy as one of motive power in Green Growth. Review for renewable energy policy of two countries gives Korean policy implication and helps "Green Growth", national theme of Korea.

• Journal of the Korean Institute of Landscape Architecture International Edition
• /
• no.1
• /
• pp.208-212
• /
• 2001

Based on the theory of characteristics and sustainable development in Kunming city, this article analyses and evaluates the development of urban tour recreation and resort in Kunming and puts forward viewpoints and blueprint for its future development in terms of culture, history; Nationality, folks-custom; three-benefit of society, environment and economy; and the urban ecology and green plants (landscape) etc.

• Journal of the Korean Professional Engineers Association
• /
• v.43 no.5
• /
• pp.35-40
• /
• 2010

The world economy is threatened by rising oil prices due to the depletion of resources, and climatic changes are intensified due to rapid increase of greenhouse gases emission. Global warming is recognized as a worldwide problem not only as national level one, collaborative efforts are in progress actively. The fact is that the development of new & renewable energy which can replace fossil fuel and preserve the environment is the key of the attention in accordance with "low carbon, green growth" policy of our government. Biogas is an energy source. And the best part of using biogas is that wastes are treated in its production process.

• Journal of Korea Port Economic Association
• /
• v.26 no.4
• /
• pp.329-353
• /
• 2010

This paper deal with government logistics policy in related low carbon in China. The government policy of promoting low-carbon way is more dependent on the top-down enforcement rather than voluntary market principles. It will succeeded in transforming the environment-friendly image, to focus on creating a mindset the company can go on voluntary carbon-reduction. The three factors of low-carbon economy and the new energy and industrial development policy is technology and funding, and that most of the government's policy has a crucial role. Due to the nature of the Chinese economy, government policies impact on the development of the industry is very important, and even for China's industrial restructuring of the logistics industry in the areas of government policy support for green economic growth, its role is expected to be very large. In Future, Chinese government will promote low carbon policies through the optimization of the logistics network to reduce energy waste, pursue the low carbon-reduction of logistics machinery and equipment, and develop an mode to appropriate demand for green low-carbon economic growth.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.7
• /
• pp.528-534
• /
• 2019

This study analyzes the factors affecting China's carbon emissions from 1985 to 2016. In recent years, the whole industries of China are in the midst of industrialization and have several problems. Now, the low-carbon economy has become the main task of China's economic development. This study analyzes the factors affecting China 's carbon emissions by selecting relevant data onto the Chinese yearbook and using a time series model. The analysis shows that related industries continue to innovate and increase the use of green energy such as electricity, but coal is still the largest share of the energy consumed. As energy use efficiency increases and industrial R&D investment increases year by year, carbon emissions are increasing every year. In addition, there is a stereotype that industry is the biggest factor affecting carbon emissions. The research found that the impact of the industry on China's carbon emissions is declining gradually. While controlling industrial carbon emissions, keeping continue to improve technology development and focusing on carbon emissions from other industries are critical to reduce overall carbon emissions. Based on the empirical results, if we can change stereotypes starting from the nature of the data, we will quickly reach a low carbon sustainable development economy.