Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"Frost formation."”.
-
Theory of frost formation,
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1969.
-
Effects of the hydrophobic coating on the initiation of frost formation.
… limit the growth rate of ice crystals and retard frost formation on the hydrophobic coated surfaces. Three empirical correlations for dimensionless freezing time of single water droplets with three various static contact angles were developed. The correlations can be used to predict dimensionless …
-
Wetting and frosting/defrosting study on microgrooved surfaces
… of surface wettability on the condensation and frosting processes, to minimize condensate retention and frosting penalties, and to promote effective defrosting. In the present study, the effects of microgrooved surface topography on metal substrates, fabricated without any chemical modification …
-
INVESTIGATION OF PERFORMANCE DEGRADATION OF EVAPORATOR FOR LOW TEMPERATURE REFRIGERATION APPLICATIONS
… rate and the power consumption of the electric defrost heater. The system is designed to work as a commercial refrigeration system for low temperature applications including freezing and defrost cycles. A manual and automatic defrost control has been designed and tested. The calculated values are …
-
Metal foams as novel materials for air-cooling heat exchangers
… issues related to condensate drainage and frost formation are considered. The main performance obstacle for the application of metal foams is the relatively high pressure drop occurring for velocities typical to air-cooling applications. This high pressure drop results in larger air-side …
-
Exploiting Interfacial Phenomena to Expel Matter from its Substrate
… liquids or dew, or retard ice accretion or frost formation, the physics of several dewetting and/or deicing mechanisms are yet to be fully understood. Even though we know how jumping-droplet condensation offers significantly better heat transfer performance than regular dropwise condensation …
-
Condensation Frosting: From Ice Bridges to Dry Zones
The most ubiquitous mode of frost formation on substrates is condensation frosting, where dew drops condense on a supercooled surface and subsequently freeze, and has been known since the time of Aristotle. The physics of frost incipience at a microscopic scale has, nevertheless, eluded researchers …
-
Liquid-infused slippery surfaces for air-conditioning and refrigeration applications
… 5˚ and reduces the water retention ratio after defrosting by more than 75% compared to the baseline specimen. A delay of ice formation is also observed. These LISs can effectively drain condensate, retard frost formation, and reduce frost meltwater retention. Water droplet configuration on the …
-
Impact of heat exchanger surface wettability on condensation, frosting, and defrosting performance under practical testing conditions
Condensation and frost accumulation on aluminum heat exchangers present major challenges for heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems. Both phenomena increase thermal resistance and airflow restriction, which diminish heat transfer, lower system capacity, and drive …