| Title |
In-Situ Measurement of Chiller Performance andThermal Storage Density of an Ice Thermal Storage System |
| Authors |
신영기 ; 양훈철 ; 태춘섭 ; 조수 ; 김영일 |
| Keywords |
Chiller ; 냉동기 ; Ice thermal storage system ; 빙축열 시스템 ; COP ; Thermal stor-age density ; 축열밀도 ; Turbo chiller ; 터보냉동기 ; ESCO ; 에너지절약전문기업 ; Peak load ; 첨두부하 |
| Abstract |
In-situ measurement was made to evaluate chiller performance and thermal storage density of an ice thermal storage system. The system belonged to a big hotel and the measurement was conducted during late October. Owing to very small cooling load, the data logging was possible for a single thermal storage cycle. However, operation history of the chiller showed a relatively good spectrum of data for performance evaluation. COP and ther-mal storage density were calculated. The COP at full load was about 4.07, which was lower than 4.8∼6.4 of new chillers. The measured storage density was about 10.9RT-h/m3(＝152 MJ/m3), which also was lower than a criterion of normal performance(above 13.0RT-h/m3 or 181MJ/m3). The study result provides technical basis for quantitative ESCO business scenario. |