Journal of Korean Institute of Architectural Sustainable Environment and Building SystemsISSN:1976-6483(Print) 2586-0666(Online)한국건축친환경설비학회

The study proposed a method of improving the energy performance of a building in the development of a large-scale complex. In this study, a specific energy-saving method is proposed based on the case of a building in a large complex in Japan, which accomplished a high-efficiency energy performance by conducting energy management consistently from the planning stage to the operating stage. Specifically, the major energy-saving features of this facility are as follows. 1) High-efficiency district heating and cooling (DHC) energy system. 2) Energy data collection system for energy management. 3) Construction of energy management system based on the coordination between the building group and DHC business operators. 4) Energy management through energy data analysis using Building Energy Management System. Based on energy management, the achieved annual primary energy coefficient of performance (COP) was 1.35, which was the third highest among the DHCs in Japan. Furthermore, the COP has been continuously increasing after the completion of construction, and the cooling energy system showed an improvement of 10% over five years. This study quantitatively examined the energy management methods in the design and operating stages and their effects on a large-scale complex building, and demonstrated the significance of the energy management of energy savings for an entire building.