| Title |
An Experimental Study on the Frost Prevention using Micro Liquid Film of an Antifreezing Solution |
| Keywords |
Frost prevention ; 착상방지 ; Antifreezing solution ; 부동액 ; Micro liquid film ; 마이크로 액막 ; Porous layer ; 다공물질층 |
| Abstract |
The effect of antifreezing solution liquid film on the frost prevention is experimentally investigated. It is desirable that the antifreezing solution spreads widely on the heat exchanger surface forming thin liquid film to prevent frost nucleation and reduce the thermal resistance across the film. A porous layer coating technique is adopted to improve the wettedness of the antifreezing solution on a parallel plate heat exchanger. The antifreezing solution spreads widely on the heat exchanger surface with 100m thickness by the capillary force resulting from the porous structure. It is observed that the antifreezing solution liquid film prevents a parallel plate heat exchanger from frosting. The reductions of heat and mass transfer rate caused by thin liquid film are only 1～2% compared with those for non-liquid film surface. |