• Journal of Environmental Policy
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• v.8 no.4
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• pp.75-94
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• 2009

The process of obtaining third-party financing contacts was analyzed via a two-stage game model: a "signaling game" for the first stage,and a "principal-agent model" for the second stage. The two-stage game was solved by a process of backward induction. In the second stage game, the optimal effort level of the energy saving company (ESCO), the optimal compensation scheme of the energy user, and the optimal payoffs for both parties were derived for each subgame. The optimal solutions forthe different subgames were then compared with each other. Our main finding was that if there is some restriction on ESCO's revenue (e.g. a progressive sales tax) that causes ESCO's revenue toincrease at a decreasing rate, then the optimal sharing ratio is uniquely determined at a level of strictly less than one under a linear compensation scheme, i.e. a unique balance exists. Subgames have a unique equilibrium arrived at separately for each situation,. Within this equilibrium, energy users accept energy audit proposals from H-type ESCOs with high levels of technology, but reject proposals from L-type ESCOs with low levels of technology. While L-type ESCOs cannot attain profits in the third-party financing market, H-type ESCOS can pocket the price differential between L-type and H-type audit fees. Accordingly, revenues in an H-type ESCO equilibrium increase not only in line with the technology of the ESCO inquestion, but also faster than in an L-type equilibrium due to more advanced technology. At the same time, energy users receive some positive payoff by allowing ESCOs to perform third-party financing tasks within their existing energy system without incurring any extra costs.

• 월간 기계설비
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• no.4 s.201
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• pp.30-36
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• 2007

ESCO란 에너지 절약회사(Energy Saving Company) 또는 에너지 서비스 회사(Energy Service Company)를 뜻하는 용어로 지난 1992년 정부에서 에너지 절약을 촉진하기 위해 정책자금을 도입하면서 등장했다. 이들 기업은 정부에서 정책자금을 빌려 공장이나 아파트 등 에너지 사용자에게 에너지 절약시설을 지어주고 에너지를 줄인양만큼 투자비를 회수해 간다. 고유가가 계속되면서 에너지절약 전문기업인 ESCO 단위 사업규모가 점차 대형화되고 있다. ESCO 투자실적은 1998년 이후 에너지절약 시설 개체 사업의 급속한 증가에 힘입어 매년 급격히 성장하고 있다. 최근에는 2천억원대의 시장규모를 가지고 2005년에는 건당 평균 9.1억원이 지원된 것으로 나타났다. 에너지관리공단 자금지원팀의 자료에 의하면 ESCO투자사업 자금지원은 1993~1998년 197건에 480억원이 지원됐으나 2005년에는 202건에 1,829억원이 지원된 것으로 나타났다. 지난 2006년 9월 말 현재 ESCO투자사업 자금지원은 106건에 1,020억원이 대출 은행에 추천된 것으로 알려졌다. 또한 에스코 사업분야가 조명기기·보일러 등 단순설비 교체에서 열병합발전소·냉난방설비, 공정개선 및 폐열회수 등 복합설비 쪽으로 확대되고 있는 것으로 나타났다. 따라서 에너지 소비가 큰 화학 철강 제지 등 산업체, 대형병원, 산업단지 등이 새 에너지 절감 시스템을 도입하면 에너지 효율성 개선에 효과적인 사업이다. 본지는 지난호에 ESCO사업 현황과 투자사례를 게재하고, 이번호에는 ESCO사업 지원시책과 외국의 ESCO활동 현황 및 국내의 ESCO 투자사례를 게재할 계획이다.

• 월간 기계설비
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• no.1 s.198
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• pp.35-42
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• 2007

ESCO란 에너지 절약회사(Energy Saving Company) 또는 에너지 서비스 회사(Energy Service Company)를 뜻하는 용어로 지난 1992년 정부에서 에너지 절약을 촉진하기 위해 정책자금을 도입하면서 등장했다. 이들 기업은 정부에서 정책자금을 빌려 공장이나 아파트 등 에너지 사용자에게 에너지 절약시설을 지어주고 에너지를 줄인양만큼 투자비를 회수해 간다. 고유가가 계속되면서 에너지절약 전문기업인 ESCO 단위 사업규모가 점차 대형화되고 있다. ESCO 투자실적은 1998년 이후 에너지절약 시설 개체 사업의 급속한 증가에 힘입어 매년 급격히 성장하고 있다. 최근에는 2천억원대의 시장규모를 가지고 2005년에는 건당 평균 9.1억원이 지원된 것으로 나타났다. 에너지관리공단 자금지원팀의 자료에 의하면 ESCO투자사업 자금지원은 1993~1998년 197건에 480억원이 지원됐으나 2005년에는 202건에 1,829억원이 지원된 것으로 나타났다. 지난 2006년 9월 말 현재 ESCO투자사업 자금지원은 106건에 1,020억원이 대출 은행에 추천된 것으로 알려졌다. 또한 에스코 사업분야가 조명기기·보일러 등 단순설비 교체에서 열병합발전소·냉난방설비, 공정개선 및 폐열회수 등 복합설비 쪽으로 확대되고 있는 것으로 나타났다. 라서 에너지 소비가 큰 화학 철강 제지 등 산업체, 대형병원, 산업단지 등이 새 에너지 절감 시스템을 도입하면 에너지 효 율성 개선에 효과적인 사업이다. 지는 이번호에 ESCO사업 현황과 투자사례를 게재하고, 다음호에는 ESCO사업 지원시책과 외국의 ESCO활동 현황 및 국내의 ESCO 투자사례를 게재할 계획이다.

• 한국태양에너지학회:학술대회논문집
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• 2012.03a
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• pp.286-292
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• 2012

In recent years, building energy has received much attention and there are many support system to reduce building energy consumption. In addition, It is clear that encouraging to energy efficiency investments can be beneficial to our society, because of the energy supply instability and higher energy price in Korea. Nevertheless, ESCO business, represent the existing building energy retrofit business, hardly has not expanded in Korea. besides, in the case of existing building, it is more difficult to achieve the energy retrofit measures than new building, due to the existing buildings have attributes such as a long life and a lots of energy factor, etc. Therefore, for activate ESCO business and expand ESCO bussiness target to small-to-medium building, it is needed to optimization of retrofitting methods for existing small-to medium buildings in Korea. this research was to derive energy retrofit methods through the energy audit and analysis performed for a small-to-medium building located in Suwon, Korea.

• Journal of Mechanical Science and Technology
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• v.19 no.8
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• pp.1670-1681
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• 2005

In-situ diagnosis of chiller performance is an essential step for energy saving business. The main purpose of the in-situ diagnosis is to predict the performance of a target chiller. Many models based on thermodynamics have been proposed for the purpose. However, they have to be modified from chiller to chiller and require profound knowledge of thermodynamics and heat transfer. This study focuses on developing an easy-to-use diagnostic technique that is based on adaptive neuro-fuzzy inference system (ANFIS). The effect of sample data distribution on training the ANFIS is investigated. It is found that the data sampling over 10 days during summer results in a reliable ANFIS whose performance prediction error is within measurement errors. The reliable ANFIS makes it possible to prepare an energy audit and suggest an energy saving plan based on the diagnosed chilled water supply system.

• The KSFM Journal of Fluid Machinery
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• v.19 no.2
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• pp.43-48
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• 2016

This study proves successes of Energy Service Company (ESCO) business by heat pump performance test. The purpose of ESCO business is recover investment costs through saving energy from installation of energy reduction facility. The most important technology assessment items are heat recovery and generator output. Experimental result shows that increase quality of heat recovery (11.52Gcal/h), while decrease generator output (0.234kw). In its final analysis, the ESCO business is successful according to our data.

• KIEAE Journal
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• v.12 no.6
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• pp.85-92
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• 2012

The Korean government has introduced building regulations with improved energy conservation measures, including higher insulation levels for building envelope. However, there are many existing buildings that tend to consume more energy for heating and cooling than new buildings, as they were built under the former regulations with relatively higher U-values of walls and glazing. In order to improve energy efficiency in existing buildings, green remodelling of building envelope and building services are required. For existing buildings, building services improvements have been achieved through energy service company(ESCO), but much attention has not been paid to building envelope improvements with various reasons, such as uncertainty of energy saving effect design issues and costs. The aim of this study is to evaluate the impact of building envelope improvements in a typical commercial building on its heating and cooling energy loads. The results show that the improvement of glazing with lower U-values has the highest energy saving effects, followed by wall, roof and floor, under the condition of same level of insulation improvements. However, high insulated glazing increased LCC because of higher initial investment costs.