Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Energy Performance and Operating Cost Assessment for Implementing Green Remodeling Technologies in a Detached House

단독주택 건물 그린리모델링에 따른 건물 에너지 성능과 운전비용 절감 효과 평가

  • Byonghu Sohn (Department of Building Energy Research, KICT) ;
  • Su-In Lee (Department of Building Energy Research, KICT) ;
  • Jae-Sik Kang (Department of Building Energy Research, KICT)
  • 손병후 (한국건설기술연구원 건축에너지연구소) ;
  • 이수인 (한국건설기술연구원 건축에너지연구소) ;
  • 강재식 (한국건설기술연구원 건축에너지연구소)
  • Received : 2023.11.06
  • Accepted : 2023.11.30
  • Published : 2023.12.01
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Abstract

The Government the Republic of Korea is showing a lot of interest in net zero-energy buildings (NZEBs) to reduce energy consumption of buildings and to promote green growth policy in construction sector. The application of building passive technologies and renewable energies is essential to achieving NZEBs. Green remodeling reinforced the insulation of the exterior walls and roofs of the buildings and replaced high-efficiency windows and doors. In this study, the energy performance before and after green remodeling applied in a detached house was comparatively analyzed for baseline scenario and three different ones, ALT 1, ALT 2 and ALT 3. A building modeling and simulation software (DesignBuilder V7.0) with EnergyPlus (V9.4) calculation engine was used to calculate the energy demand and energy consumption for each scenario. Based on the calculation results of the building's energy demand for baseline, it was determined that the target building required more heating energy than cooling energy. The simulation results also showed that the implementation of building envelope performance improvement technologies (ALT 1) could notably decrease the heating energy consumption of the building. After the remodeling (ALT 1), the source energy consumption per unit floor area was assessed to be reduced by 65.2%, compared to prior remodeling of 338.7 kWh/m2 -y. Meanwhile, ALT 2 can achieve energy savings of 67.7% and ALT 3 can achieve savings of 73.1%. Following completion of the remodeling project, actual construction costs, and on-site measurements and verification results will be gathered and compared with the simulation results. Additionally, economic analysis including construction costs and payback period will be conducted using actual site data.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(과제번호 RS-2022-00141900, 그린리모델링 활성화를 위한 건축물 에너지 디지털 진단 및 설계 자동화 기술개발).

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