期刊
APPLIED PHYSICS LETTERS
卷 115, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5113845
关键词
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资金
- Air Conditioning and Refrigeration Center (ACRC), an NSF
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) - Japanese Ministry of Education, Culture, Sports, Science and Technology
Frost formation and ice accretion are major problems for a plethora of industries. Common defrosting and deicing techniques utilize energy-intensive mechanical actuation to dislodge ice/frost or heating methods to melt ice/frost from surfaces. Here, we develop an ultraefficient method to defrost/deice surfaces by spatially and temporally localizing thermal energy at the substrate-ice/frost interface. To remove ice/frost efficiently, it is beneficial only to melt the interfacial layer adhering the ice/frost to the solid surface by using a localized pulse of heat, allowing gravity or gas shear in conjunction with the ultrathin lubricating melt water layer to remove the ice/frost. To probe the physics of pulse defrosting, we first developed a transient numerical heat transfer model. Experimental validation of the model was achieved via pulse ( approximate to 100ms) joule heating of indium tin oxide on glass samples. Utilizing transient heat fluxes ranging from 10 to 100W/cm(2), spontaneous melting of the interfacial ice/frost layer was achieved, leading to rapid ice removal. We employed our validated model to outline design guidelines for pulse defrosting applications, showing <1% of the energy and <0.01% of the defrosting time needed when compared to conventional thermal-based defrosting methods.
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