This study, the urban energy used office building green roof type composition of the target by analyze building energy reductions. Green roof is total 6 types(type A~F) were selected, EnergyPlus the energy simulation programs were used. Top floor of green roof types evaluation, the reduction of the cooling peak load type E(1.26%), type D(1.30%), type C(1.37%), type B(1.45%), type F(1.49%), and heating peak load is type D(1.32%), type E(1.40%), type C(1.47%), type F(1.69%), type B(2.13%) order. Annual cooling load of heating load is reduced more than about 1% effect. The heating load reduction ratio for a maximum of 9% respectively. Cooling peak load of the building energy performance evaluation of type F ＞type B ＞type C ＞type D ＞type E in the order and in the case of peak loads heating type B ＞type F ＞type D ＞type E ＞type C order. Annual total energy use reduction of 1.07 to 1.22% and earn, type B in the best good. In primary energy use reductions in the presence of a green roof were in the 4249~4876 kWh/yr. Annual CO2 emissions reductions of unapplied type A were analyzed on average 469.78 kg.

Abstract
 1. 서 론
 2. 연구범위 및 방법
  2.1. 식재기반조성
  2.2. 건물에너지성능 시뮬레이션 개요 및 해석 프로세스
  2.3. 적용 건물 모델링 및 설정 조건
 3. 연구결과 및 고찰
  3.1. 옥상녹화 유형별 최상층 에너지성능평가
  3.2. 옥상녹화 유형별 총 건물 에너지성능평가
  3.3. 1차에너지 사용량 및 연간 이산화탄소 배출량
 4. 결 론
 참고문헌

• 김정호(건국대학교 녹색기술융합학과) | Jeong-Ho Kim (Department of Green Technology Convergence, Konkuk University)
• 권기욱(건국대학교 녹색기술융합학과) | Ki-Uk Kwon (Department of Green Technology Convergence, Konkuk University)
• 윤용한(건국대학교 녹색기술융합학과) | Yong-Han Yoon (Department of Green Technology Convergence, Konkuk University)
• 주창훈(산림조합중앙회) | Chang-Hun Joo (Forest Inventory Center, National Forestry Cooperatives Federation) Corresponding author