| 논문명 |
BEMS 데이터를 활용한 축열 시스템의 운전 성능 및 효율 저하 평가에 관한 연구 / An Evaluation on the Operation Performance and Reduced Efficiency of Thermal Storage System via BEMS Data |
| 저자명 |
박성철(Park, Seong-Cheol) ; 김유진(Kim, Yu-Jin) ; 김환용(Kim, Hwan-Yong) ; 송영학(Song, Young-Hak) |
| 수록사항 |
한국건축친환경설비학회 논문집, Vol.13 No.6 (2019-12) |
| 주제어 |
축열시스템; BEMS; 지열히트펌프; 설계오류; 운전효율 ; Thermal Storage System; BEMS; Geothermal Heat Pump; Design Error; Operation Efficiency |
| 요약2 |
This study summarized and analyzed the operation status of heating, ventilation, and air conditioning (HVAC) in buildings using the data acquired by a building energy management system (BEMS) and identified the operation performance. The target building was a library where energy efficiency grade, passive buildings, and passive and active elements were applied such as Grade 5 zero energy building (ZEB). The main components of the HVAC system was composed of thermal storage tank system utilizing the mid-night electric power and geothermal heat pump. The analysis results verified that the mean Coefficient of Performances (COP) of the heat pump device and the system during heating operation were 3.7 and 3.2, which were decreased in operating efficiency by -2.9% and -4.5%, and 4.5 and 3.4 during cooling operation, which were improved in operating efficiency by 5.7% and -5.0%. In the middle of the process that checked the loss of heat storage during cooling operation, the design errors occurred in the pipe system in the thermal storage tank were verified. The temperature stratification inside the thermal storage system was not made because the 3-way valve was not implemented in the sections of the heat pump and thermal storage tank. The comparison results based on the assumption of normal design showed that the heat storage loss for 22 days in a month of July in 2019 was 31,228 kWh. Considering the daily loss and system COP, the entire power loss of heat storage in July was 9,281 kWh, which incurred additional cost of KRW 514,161 accordingly. |
