| Title |
Cost Efficiency Analysis of Design Elements for an Energy-efficient Apartment Complex and Establishment of Design Models |
| Authors |
Song Seung-Yeong ; Lee Soo-Jin |
| Keywords |
Apartment Complex ; Energy ; Building Energy Efficiency Rating System ; Cost Efficiency |
| Abstract |
The demand for sustainability capable of coping with worldwide climate changes has been increasing. In korea, the building sector is responsible for over 25% of the total energy consumption, and 68% of the energy consumption in the building sector comes from residential use. Therefore, energy efficient residential buildings are essential for maintaining sustainability. Meanwhile, the improvement of energy efficiency may lead to the rise of construction cost. Consequently, if cost-efficient design models for improving energy efficiency are suggested, they will contribute to the spread of energy efficient buildings. For this reason, the aim of this study is to establish cost-efficient design models for developing the energy efficiency of an apartment complex, which is the most common type of residential building in Korea, by using the assessment method of the Building Energy Efficiency Rating System. First, the baseline model was set up, based on an actual apartment complex. Alternatives for selected items among all the assessment items in the Building Energy Efficiency Rating System were then set up to increase the energy efficiency of the baseline model. After estimating the construction and energy costs of alternatives and the baseline model, the Life cycle cost, the Net present value, the Internal rate of return and the payback period of all alternative and their priority orders were presented. Finally, the easily applied first grade design model, the Life Cycle Cost minimized design model and the energy cost minimized design model were established. |