• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1996.04a
• /
• pp.157-160
• /
• 1996

• Proceedings of the Korean Nuclear Society Conference
• /
• 2005.05a
• /
• pp.1140-1141
• /
• 2005

• Proceedings of the Korean Nuclear Society Conference
• /
• 2005.05a
• /
• pp.1158-1159
• /
• 2005

• Proceedings of the Korean Nuclear Society Conference
• /
• 2005.10a
• /
• pp.951-952
• /
• 2005

• International conference on construction engineering and project management
• /
• 2024.07a
• /
• pp.1314-1314
• /
• 2024

Since 2017, South Korea has been the first country in the world to implement a national certification system for Zero Energy Buildings (ZEB). This system aims to maximize the energy efficiency of buildings to reduce greenhouse gas emissions and reduce energy consumption in the building sector using renewable energy. To achieve this goal, the ZEB certification system classifies green buildings into five grades based on the energy independence rate. However, the current ZEB certification system based on the energy independence rate is only considered a requirement for building completion, losing its original intent. This study aims to highlight the problems and limitations of the ZEB certification system based on the energy independence rate and to propose an operational plan for the system that can genuinely reduce energy consumption in the building sector. For this, the actual energy consumption and the renewable energy production referenced during the certification of 10 ZEB-certified buildings were quantified and compared with the energy independence rate. The total energy consumption, energy production, life cycle cost, performance coefficient of equipment, and other key indicators were analyzed to evaluate the actual effects of ZEB certification on energy savings. As a result, the simple energy independence rate-based ZEB certification was judged to be inconsistent with the original intent of the system. The ZEB certification system needs to be re-established to reflect the design of systems that can activate and utilize energy savings and renewable energy usage in buildings. Additionally, improvements in the management and inspection systems are necessary to determine how much they contribute to actual reductions in greenhouse gas emissions and energy consumption post-certification.

• International conference on construction engineering and project management
• /
• 2009.05a
• /
• pp.276-284
• /
• 2009

As an on-going research project, Zero Net Energy Test Home (ZNETH) project investigates effective approaches to achieve whole-house environmental and energy goals. The main research objectives are (1) to identify energy saving solutions for designs, materials, and construction methods for the ZNETH house and (2) to verify whether ZNETH house can produce more energy than the house uses by utilizing Building Information Modeling (BIM) and energy analysis tools. The initial project analysis is conducted using building information modeling (BIM) and energy analysis tools. The BIM-driven research approach incorporates architectural and construction engineering methods for improving whole-building performance while minimizing increases in overall building cost. This paper discusses about advantages/disadvantages of using BIM integrated energy analysis, related interoperability issues between BIM software and energy analysis software, and results of energy analysis for ZNETH. Although this investigation is in its early stage, several dramatic outcomes have already been observed. Utilizing BIM for energy analysis is an obvious benefit because of the ease by which the 3D model is transferred, and the speed that an energy model can be analyzed and interpreted to improve design. The research will continue to use the ZNETH project as a testing bed for the integration of sustainable design into the BIM process.

• Proceedings of the Korean Nuclear Society Conference
• /
• 2005.10a
• /
• pp.93-94
• /
• 2005

• Journal of Environmental Science International
• /
• v.25 no.2
• /
• pp.281-288
• /
• 2016

After analyzing of heating value of four kinds of RDF, the RDF-D has the highest heating value, was chosen to be mixed with carbonized sludge by different ratio. The 85%:15% ratio, which has the highest efficiency, was analyzed with thermogravimetric and pyrolysis kinetics. Applying of Kissinger method, activation energy was obtained from slope which is calculated from relation of ln(${\beta}/T^2{_m}$) and $1/T_m$. The kinetic parameters obtained from Kissinger method were 46.06 kJ/mol of RDF, 55.99 kJ/mol of carbonized sludge and 40.68 kJ/mol of mixture of RDF and carbonized sludge. The mixture of RDF and carbonized sludge has the lowest activation energy and frequency factor, during thermal decomposition reaction it has the slowest reaction rate and needs the lowest energy. Although activation energy with pyrolysis of RDF was irregularly scattered, it showed that activation energy was stabilized by co-pyrolysis of RDF and additives(Carbonized Sludge).

• Geomechanics and Engineering
• /
• v.16 no.5
• /
• pp.503-512
• /
• 2018

Globally there is an increasing need to reduce the greenhouse gas emissions and increase the use of renewable sources of energy. The storage of solar thermal energy is a crucial aspect for implementing the solar energy for space heating in high latitudes, where solar insolation is high in summer and almost negligible in winter when the domestic heating demand is high. To use the solar heating during winter thermal energy storage is required. In this paper, equations representing the single U-tube heat exchanger are implemented in weak form edge elements in COMSOL Multiphysics(R) to speed up the calculation process for modelling of a borehole storage layout. Multiple borehole seasonal solar thermal energy storage scenarios are successfully simulated. After 5 years of operation, the most efficient simulated borehole pattern containing 168 borehole heat exchangers recovers 69% of the stored seasonal thermal energy and provides 971 MWh of thermal energy for heating in winter.

• Advances in Energy Research
• /
• v.3 no.1
• /
• pp.11-30
• /
• 2015

The covenant of Mayors initiative includes the commitment of the municipalities-signatories to reduce voluntarily the greenhouse gas emissions over 20--- by 2020 within their boundaries and obligates them to develop and submit an energy consumption analysis and a sustainable energy action plan within a year from the adhesion. The present paper discusses the energy profile of three medium-sized north-eastern Greek Municipalities (Kavala-MoK, Alexandroupolis-MoA, Drama-MoD) through the analysis of their municipal energy balance. The results of the total final energy consumption per capita include 14.10MWh/capita, 14.24MWh/capita and 12.91MWh/capita for MoK, MoA and MoD respectively. The analysis highlighted the increased energy consumption of the private sectors, namely residential and tertiary building sand private transport. The assessment of the municipalities' energy profiles along with examination of national regulations and action plans and investigation of best available practices within the Covenant of Mayors shaped the development of the sustainable energy action plans of the examined municipalities that is presented in this paper. The proposed pathway towards low-carbon municipalities can be considered a representative case study and a starting point for other municipalities with similar characteristics.