Case Study on Energy Saving Effects through Application of Green Remodeling Signature Project to Public Buildings in Chungbuk Province

Purpose: Starting in 2020, the Ministry of Land, Infrastructure and Transport of KOREA has implemented a green remodeling support project that provides government subsidies for remodeling construction of old public buildings. In addition, a signature project was prepared to invest a large amount of project cost among buildings subject to green remodeling. In this study, we aim to compare the energy saving effects of the S Public Health Center in North Chungcheong Province through the signature project and analyze cost-effectiveness compared to the amount saved. Method: An energy evaluation was conducted before and after green remodeling of S Public Health Center using the building energy consumption evaluation program (ECO2-OD). Actual energy usage data was investigated and compared with simulation results. In addition, the amount of energy reduction resulting from the application of green remodeling construction elements was evaluated and a cost-effectiveness analysis was conducted accordingly. Result: Among the elements applied to green remodeling, the change element that showed a high impact on energy savings was the replacement of heating equipment, which showed a reduction of about 60% compared to the previous one. When green remodeling element construction was carried out for KRW 127 million, the cost benefit (cost-effectiveness) of the annual energy consumption reduction of 83.6 kWh/㎡·a was found to be KRW 22,936/kWh·a.