| Title |
Experimental Study on the Performance Characteristics of Hot-gas Bypass and On-off Defrosting Cycle in a Showcase Refrigeration System |
| Authors |
조홍현 ; 김용찬 ; 노현일 ; 김영득 ; 박윤철 |
| Keywords |
Multi-evaporator ; 복수 증발기 ; Frosting ; 적상 ; Defrosting ; 제상 ; On-off cycle ; 단속운전 ; Hot-gas bypass defrosting ; 고온가스 제상방식 |
| Abstract |
During the defrosting process, the temperature in the cabinet of a showcase becomes high as compared to the setting point, which is not desirable for stored foods or materials. It is necessary to develop a more efficient defrosting method to prevent large temperature fluctuation. In this study, the performance of a showcase refrigeration system with three evaporators is investigated by employing a hot-gas bypass defrosting technology in the system under frosting and defrosting conditions. The operating characteristics are compared with those for the on-off defrosting method that has been widely used in current products. As a result, the hot-gas bypass defrosting method shows higher refrigerating capacity and less temperature fluctuation than the on-off method under frosting/defrosting conditions, while the power input is relatively high for the hot-gas bypass method. |