• Korean Journal of Computational Design and Engineering
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• 제15권4호
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• pp.289-296
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• 2010

Energy consumption by buildings accounts for a large part of the world‘s energy consumption. Methods to analyze building energy consumption before construction have been studied for decades. With BIM (Building Information Modeling) technology, architects can easily export building information to data models in order to analyze the design‘s effect on building energy efficiency. Although several BIM-based energy simulation applications are currently available, utilizing these applications for energy efficiency simulation is difficult. In this paper, by comparing existing BIM-based energy applications, the authors test the building energy efficiencies estimated by some BIM models, offer ideas and solutions to problems that appeared during the test process and propose new methods for BIM-based energy evaluation based on quantitative factors.

• Journal of the Korean Institute of Rural Architecture
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• 제19권2호
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• pp.9-16
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• 2017

The study analyzed the heat losses and the building energy efficiency grade by the energy simulation using the ENERGY# and ECO2 programs for the three types of Standard design of rural houses. It was calculated the energy efficiency rating by the ECO2 program for the rural housing standard design, and the energy demand and the energy consumption by each factor were compared and analyzed. And it analyzed energy consumption by element of each house by ENERGY # program. As a result, first in the evaluation of the energy efficiency grade of buildings by the ECO2 program, the rating for primary energy requirement for the housing newly built by the standard design of rural house is expected to range from 2 to 4 with 189.3 to $238.7kWh/m^2.a$. Second, the energy loss of each part of standard design of rural housing occurs in the order of ventilation 39%, window 33%, outer wall 14%, roof 9%, bottom 5%, and energy loss through ventilation and window occurs more than 70%. Third, the most beneficial effects on the energy efficiency grade is obtained the lowest grade of all three types by 2 when the lowering of the window and door heat transmission rate and the lowering of the light density, and the heat exchange ventilation device is not installed. Fourth, in the standard design of rural housing, the energy demand is occupied by heating > hot water > lighting order, and the order of the weight is changed in order of heating > lighting > ventilation > hot water. Fifth, building energy efficiency assessment system needs to establish policy for fixing rural housing energy as a practical device to ensure energy performance and quality.

• Korean Journal of Computational Design and Engineering
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• 제20권1호
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• pp.11-21
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• 2015

Currently, the United States, the United Kingdom, Australia etc. are actively utilizing energy simulation for efficiency evaluation of building energy. However, domestic energy efficiency assessment system doesn't use energy simulation system properly at present: parameters based architecture plans and Ashrae Standard are inputted for the evaluation, because the input parameters for the simulation haven't been established yet. This fact causes poor reliability during energy simulation, as the values of the two standards are different from each other. Therefore, the aim of the study is to set domestic standard parameter for BIM-based energy performance evaluation, focusing on possession area per person of occupants at government office in Korea. We found that the difference among the result values occurred approximately 3% in the energy simulation. As a result of the analysis, possession area per person of occupants in Government office is $31.87m^2$. Other input parameters may be set based on this. This will increase the reliability of energy simulation through a domestic standard parameter.

• Journal of Navigation and Port Research
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• 제39권6호
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• pp.465-472
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• 2015

SEEMP (Ship Energy Efficiency Management Plan) guidelines for a ship's GHG reduction include a machinery modification of hull, an installation of energy efficiency enhanced attachment in hardware methods. It is also possible to bring a ship energy efficiency improvement by fuel-efficient operations or in other software methods. Hardware modification or installation on ship can bring financial burdens to a ship company compared to its improvement expectation. On the other hand, Software based energy-saving technology can be applicable on various ship types, and it is also expected high efficiency of ship energy use compared to hardware based technology in perspective of the investment costs and efficiency. In this paper, it is described that the ship handling simulator based evaluation was carried out using representative ship model of bulk, container and VLCC. Simulation environments were separated into 6 conditions according to the sea-state and weather condition, and the operation results were compared with those before and after energy saving system applied The container ship showed the largest FOC save rate after energy saving system applied although the others also showed energy save rate after using the system.

• KIEAE Journal
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• 제12권6호
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• pp.39-47
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• 2012

Recently, the green building and energy connection system are establishing. But, National certification system for environment-Friendly Buildings is indicated hangup about energy efficiency of building. Commissioning, energy conservation, renewable energy, carbon dioxide emissions, it is determined that the energy associated with LEED and GBCC four items of the comparative analysis showed the following results. First, on the practical performance of the system after the completion of commissioning of the energy associated with the system completed until after the final performance for secure operation from the planning stage to verify and document systematically how to perform, but the domestic review and verification is incomplete. Second, the use of energy-saving and renewable energy is directly related to the energy consumption of the building, but GBCC the strengthening of standards on how to evaluate it is deemed necessary. Finally, the evaluation of the reduction of carbon dioxide emissions, LEED Unlike GBCC the life-cycle of the system without considering the global warming index only because a substantial step in the operating efficiency can not be assessed. Based on this study GBCC energy savings through efficiency to actively carry out research through a systematic analysis of the basic guidelines to proceed.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.297-297
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• 2009

EERE(Energy Efficiency and Renewable Energy)는 미국 DOE(Department of Energy)의 산하기관으로 에너지 효율화와 신재생에너지 정책 전반의 기획 및 프로그램 평가를 담당하고 있다. EERE에서 수행하는 평가 Tool중 가장 일반적으로 쓰이는 것은 General program evaluation(프로그램 일반 평가)인데 여기서는 크게 다섯 가지의 세부 평가 방법을 제시하고 있다. 이중 Impact evaluation은 기술 확산이론(diffusion of innovations)를 이론적 토대로 하고 있는 보급 및 R&D프로그램의 평가 방법론이다. 이는 프로그램 성과를 높은 수준으로 정량화 시킬 수 있으며 특히 외부효과들을 제외한 순수한 프로그램의 결과만을 도출하는 것을 평가의 목표로 하고 있어 실제 성과분석에서 매우 유용하게 사용된 다. Impact evaluation의 시행은 Impact evaluation framework라 불리는 일련의 과정을 거쳐 실시되는데 이것은 체계적인 평가를 돕고 평가 전반의 신뢰도를 높이는 역할을 한다. 본 연구는 Impact evaluation 방법론을 심도 있게 고찰하고 이를 통해 국내 신재생에너지 정책평가로의 적용가능성을 살펴보았다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.300-300
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• 2009

Outcome Evaluation은 미국의 DOE(Department Of Energy)산하 EERE(Energy Efficiency and Renewable Energy)에서 프로그램 평가를 위해 사용하는 General Program Evaluation Guide에서 언급된 5가지 평가방법 중 하나로 프로그램의 결과를 측정하여 평가하는 방법이다. 이는 프로그램을 시행한 후 일정한 기간이 지난 뒤 프로그램의 목적을 달성함으로써 얻어지는 결과를 추산하여 그 기간 동안 프로그램이 의도했던 목적을 위해 얼마나 잘 수행되었는지를 보여준다. 본 연구에서는 Outcome Evaluation을 이용하여 한국에서 진행되고 있는 신재생에너지 보급사업에 대한 평가를 하였다. 현재 한국의 신재생에너지 보급사업은 크게 보급지원제도와 기반조성사업으로 나누어져 있으나 본 연구에서는 보급지원제도에 중점을 두어 평가를 진행하였다. General Program Evaluation Guide에 따르면 Outcome Evaluation의 방법론은 engineering estimation에서 survival analysis에 이르기까지 다양한 방법론을 제시하지만 본 연구에서는 Tabulation과 Correlation을 주로 활용하였다. 먼저 평가의 대상이 되는 프로그램과 시기를 정하고 평가지표를 산정한 뒤 위와 같은 방법론을 활용해 평가를 진행했고, 그 시사점을 도출하였다.

• Journal of the Korean Solar Energy Society
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• 제25권4호
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• pp.53-60
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• 2005

The purpose of this study is to improve energy efficiency of windows in office buildings through the evaluation of their heating, cooling and illumination load. Energy efficiency is influenced by window size which is determined at the early stage of building design. The process of this study is as follows. First, energy performance is analysed according to the various rates of windows through computer simulation (ECOTECT). Then, the annual heating, cooling and illuminating loads according to the different window sizes are compared one another. Results indicated that the optimal window size considering energy efficiency is 50% of the surface area. When the window size is 50% of the surface area, annual maintenance expense is also smallest. Since the cost of cooling is larger than that of heating, too low indoor air temperature in summer is unfavorable based on the reasonable annual maintenance expenses.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.301-301
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• 2009

The General program evaluation guide is intended for use by managers of both deployment and R&D programs within the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE), although most of the examples of evaluations pertain to deployment programs(EERE,2006). It could help managers determine what kinds of timely adjustments may be needed in program design or implementation to improve the rate or quality of achievement relative to the committed resources. To consider the adaptation of the method in Korea, we have studied the evaluation case for solar america initiative using cost-benefit evaluation. The President's Solar America Initiative (SAI) was launched in January 2006 as part of the administration's Advanced Energy Initiative. The SAI has a goal of installing 5-10 GW of photovoltaic (PV) systems in the U.S. by 2015 and 70-100 GW of PV systems in the U.S. by 2030. The evaluation report presents estimates of the potential benefits should the SAI PV installation goals be achieved. For this analysis, the areas researched include energy, economic, and environmental benefits. As a result, research suggests that 500 MW of PV may have been enough to avoid lackout. The ability of PV to prevent specific blackouts will depend on very specific information on where the PV installations are installed and their ability to relieve pressure on the high stress points on the grid. While this level of detail is outside the scope of this study, it appears that there will be some potential benefit for blackout prevention should the SAI PV goals be achieved.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.285-288
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• 2009

정부는 최근 그린홈 100만호 사업을 중심으로 각종 신재생에너지 보급률 향상을 도모하는 많은 프로그램을 기획하여 현재 약 12개의 신재생 에너지 보급지원 프로그램과 R&D 프로그램을 운영하고 있다. 그러나 현재 국내 신재생에너지 정책 및 프로그램은 차후 개선 및 체계적인 운영을 위한 조직적인 프로그램 평가 체계를 갖추고 있지 않으며 평가 기관이나 평가 주기 등 평가에 필요한 기본적인 합의와 법제적 배경 역시 미비한 상황으로 신재생에너지 프로그램의 평가 제반 시스템에 대한 근본적 고민이 필요한 시점이라고 볼 수 있다. 이에 본 연구에서는 미국 DOE(Department of Energy)산하 EERE(Energy Efficiency & Renewable Energy)의 신재생에너지 보급사업평가체계를 분석하여 EERE 프로그램 평가 방법의 국내 적용 가능성을 검토해 보았다. EERE는 미국의 에너지 효율화 및 신재생에너지 전담 사무국으로 10개의 에너지효율화 및 신재생에너지 연방정부 프로그램을 운영하고 있으며 Strategic Management system을 통해 효율적인 프로그램 관리를 시도하고 있다. 특히 General program evaluation Guideline에서는 표준화된 세부 평가 방법론을 제시하여 정례적 혹은 일회적 평가를 시행하고 있는데 이 세부 평가 방법들은 프로그램의 특성에 따라 프로그램을 운영하고 프로그램의 존속 및 개선여부를 결정하는데 결정적인 도움을 주고 있어 차후 국내에서 시행되고 있는 신재생에너지 프로그램의 정성적/정량적인 평가를 시행하는 많은 시사점을 제공할 것으로 기대된다.