| Title |
The Frost and Defrost Performances of Fin-and-Tube Exchangers with Different Surface Characteristics |
| Keywords |
Fin-and-tube heat exchanger ; 핀-관 열교환기 ; Surface characteristics ; 표면특성 ; Frost ; 착상 ; Defrost ; 제상 ; Hydrophilicity ; 친수성 ; Contact angle ; 접촉각 |
| Abstract |
The effects of different surface hydrophilicity on frosting and defrosting characteristic were experimentally investigated. Mass of frost and water hold-up was measured. Results showed that no significant difference in the frost mass was found between the two different surfaces while the water hold-up of heat exchanger could be reduced by the enhancement of surface hydrophilicity. Also, the defrosting efficiency on hydrophilic surface was improved by 76%. It was expected that hydrophilic heat exchanger could provide the improvements in both thermal-hydraulic performances and system reliability during frost/defrost operating in refrigeration systems. |