• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.588-591
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• 2009

Ground source heat pump system; GSHPs is close to most practical use for early stage investment cost and energy efficiency in new renewable energies, and currently considered utilizing to the heat and cooling system of a building. Particularly, the case to utilize 'Standing Column well heat source gathering method' in the open standards process to have the excellent capability of gathering geothermal source is increased. But the research for the optimal design technology and the assessment of a pollution level of the ground to utilize a single well for gathering geothermal is insignificant and the design is insufficient. The heating and cooling system and the equipment to utilize a large size residential development to have over 1000 households have not developed yet. Therefore, our company developed 'geothermal hybrid system' which can construct the heat and cooling system using geothermal energy for a large size residential development of over 1000 households and conducted the evaluation of economic feasibility. Moreover we developed automatic equipment for gathering geothermal source and PLC (Programmable logic controller) to have optimal efficiency and FCU (fan coil unit) considering the floors of large size apartments.

• Journal of the Korean Solar Energy Society
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• v.35 no.5
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• pp.49-56
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• 2015

In this study a hybrid heating system based on geothermal source and solar heat was developed in order to save energy for greenhouse heating and its field performance was evaluated. Developed system are composed of following parts: water tank, heat exchanger, heat pump, fan coil unit and heat storage unit. The working performance test was carried out in a greenhouse cultivating oriental orchids being managed by $23^{\circ}C$. Field performance test results showed that average heating coefficient of performance ($COP_h$) was 3.4 for the period from mid-January to mid-March 2013. Heating coefficient of performance ($COP_h$) of developed hybrid heat pump system was more sensitive to water tank temperature than outside air temperature. This study showed that developed hybrid heat pump system has a potential to save the heating costs up to 91% compared to conventional agricultural oil heaters.

• 한국태양에너지학회:학술대회논문집
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• 2012.03a
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• pp.331-336
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• 2012

Nowaday the conventional solar collector material prices are rising up because of pricy metal material over the world. The solar collector is too expensive to recycle to save the earth. Advanced polymer research is founded a high thermal resistant polymer and also it has high sun energy transmission. It also has cheaper material and easy manufacturing process, compare with conventional solar collector material. This paper is focussing on glazing simulation of polymer solar collector against wind pressure. The modeling geometry of polymer solar glazing are purposed by single layer, double layer hollow, zig-zag and tower. A simulation by using the Finite Volume was conducted to get Factor of Safety (FoS). The purpose of this paper is to find the best polymer glazing design, which can be as reference for the solar collector company to build Polymer. Hope fully new model of polymer solar collector has cheap, light, high sun energy transmitter, easy to be made and strong against wind force characteristics.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.338-343
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• 2009

Promoting policy to involve plant EPC companies for package deal has been studied to acquisite overseas energy resources. The effectiveness of the package deal with the plant EPC companies has not been successful because participation of the plant EPC companies is very low. It is difficult for the plant EPC companies to join the packaged deal due to the lack of the whole responsibility organization to support that plant EPC companies participate in package deal. The followings are suggested as the ways to promote the participation of the plant EPC companies for package deal in this study. 1) financial and policy support of governmen 2) specialization of the advanced countries.

• Plant Journal
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• v.5 no.2
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• pp.50-55
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• 2009

Promoting policy to involve plant EPC companies for package deal has been studied to acquire overseas energy resources. The effectiveness of the package deal with the plant EPC companies has not been successful because the participation of the plant EPC companies is very rare. It is difficult for the plant EPC companies to join the package deal due to the lack of the fully responsible organization to support the plant EPC companies participating in a package deal. The followings are suggested as the ways to promote the participation of the plant EPC companies for package deal in this study; 1) financial support of the government for plant EPC companies 2) political support of the government for plant EPC companies 3) specialization of the advanced countries for public-private cooperation.

• 한국신재생에너지학회:학술대회논문집
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• 2009.11a
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• pp.418-421
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• 2009

Renewable energy or green energy is a hot issue in theses days. Since wind resource can be endlessly supplied by nature, researchers and common people are interested in study how to use that resource at home or company. Especially, many architects have tried to integrate wind power generator for a part of building. So in this paper, three buildings installed wind power turbine are targed to CFD analysis and these buildings are Bahrain trade center, Discovery tower, and Pearl river tower. Bahrain trade center is the first builidng installed real wind turbine, Discovery tower is constructing at Texas, and Pearl river tower is designed and proved by china researchers. These buildings have very different type of wind power turbine and each turbine has different conditions for best power generation. Therefor this paper will focus on characteristic shape of buildings, wind power turbine type, and expected purpose of construction. Moreover, CFD analysis will show wind flow pattern and wind speed while wind is passing through wind turbine of three tall buildings. CFD analysis for three buildings make comparison the wind flow patterns with experimental result.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.149.1-149.1
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• 2011

신재생에너지 산업의 인수합병은 2010년, 전년 대비 70%가 증가하였고 이런 추이는 2011년에도 계속되고 있어 신재생에너지 인수합병 효과에 대한 심도 있는 분석과 이를 바탕으로 한 적절한 정책과 전략이 요구되고 있다. 본 연구에서는 인수합병 유형이 신재생에너지 기업의 가치에 미치는 영향을 주가를 이용하여 한 사건이 기업의 가치에 미치는 영향을 평가하는 통계학적 방법인 사건연구(event study) 방법을 통해 분석하였다. 인수합병 유형의 구분은 (1) 같은 신재생에너지원 산업 내 인수합병(수직형 기업결합), (2) 다른 신재생에너지원 산업의 기업 간 인수합병(수평형 기업결합), (3) 대형에너지 기업과 신재생에너지 기업 간 인수합병(수평형 기업결합), (4) 관련이 없는 이종 기업 간 이루어지는 인수합병(혼합형 기업결합) 총 네 유형으로 구분하였다. 분석결과 수평형 기업결합 ( horizontal merger)은 두 경우 모두 인수합병의 효과가 통계적으로 유의하지 않은 것으로 파악되었으며 혼합형 기업결합(conglomerate merger)과 수직형 기업결합(vertical merger)이 유의한 효과가 있는 것으로 나타났다. 특히 에너지산업 외부의 기업이 신재생에너지 기업을 인수하였을 때 그 효과가 가장 큰 것으로 나타났는데 이는 변동성이 매우 큰 신재생에너지 산업에 특성이 반영된 결과인 것으로 판단된다.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.1123-1127
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• 2008

The public-private cooperation in package deal has been studied for the overseas energy resources acquisition. The effectiveness of the package deal has not been successful because the deal has led by the government organizations. It is difficult for the plant EPC companies to join the packaged deal due to the lack of the whole responsibility organization to support the participation of the package deal. The followings are suggested as the ways to strengthen of the public-private cooperation in this study. 1) the relevant public enterprise privatization 2) establishment of the joint model for leading the plant EPC companies to the package deal 3) establishment of the whole responsibility organization for the public-private cooperation.

• Plant Journal
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• v.4 no.2
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• pp.73-78
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• 2008

The public-private cooperation in package deal has been studied for the overseas energy resources acquisition. The effectiveness of the package deal has not been successful because the deal has led by the government organizations. It is difficult for the plant EPC companies to join the packaged deal due to the lack of the whole responsibility organization to support the participation of the package deal. The followings are suggested as the ways to strengthen of the public-private cooperation in this study. 1) the relevant public enterprise privatization 2) establishment of the joint model for leading the plant EPC companies to the package deal 3) establishment of the whole responsibility organization for the public-private cooperation.

• Industrial Engineering and Management Systems
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• v.15 no.4
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• pp.307-317
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• 2016

According to most of energy sector experts, at least in the next two decades, fossil energy plays important role in fulfilling required energy in the world. Based on these conditions, the investigation of the conditions of major countries providing natural gas in the world can be useful in analysis of future development of this clean fuel. According to the latest estimations of British Petroleum Company, Iran with 18.2% natural gas reservoirs has the first natural gas reservoirs in the world. The main purpose of this paper is developing scenarios of gas industry in Iran. To achieve the mentioned goals, besides investigation of existing methods of scenario design and existing production scenarios, natural gas export and consumption in Iran and the world in 2035, the most important scenarios of gas industry in Iran are formulated by critical uncertainty analysis approach using quantitative advanced time based impact analysis in 2035 horizon.