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Showing 1 to 19 of 19 for “"defrosting"”.
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Microwave defrosting on a metal substrate
Microwave defrosting on a metal substrate was investigated theoretically and experimentally for application to refrigerator evaporator coils. Methods to improve the intrinsically poor microwave absorptivity of frost-on-metal substrate were explored. Experimentation was done to eliminate the …
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Wetting and frosting/defrosting study on microgrooved surfaces
… 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 of the surface, on the wettability, condensation, frost formation, and frost melt-water drainage …
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Multiphase Interfacial Phenomena for Liquid Manipulation and Defrosting
… technologies for applications in health, defrosting, and omniphobic surfaces. In Chapters 1 and 2, relevant background information and goals are provided to contextualize the research being presented in this dissertation. Chapter 3 introduces a novel metal-free alternative to conventional …
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Analytical and experimental examination of microwave defrosting method on commercial refrigerator evaporators
Defrosting of domestic refrigerator evaporator coils is currently done with external electrical heaters of various designs using a combination of convection, radiation, and conduction. These designs put unnecessary heat into the refrigerators during the defrosting process and the heat must be taken …
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TRANSIENT MODELING OF TWO-STAGE AND VARIABLE REFRIGERANT FLOW VAPOR COMPRESSION SYSTEMS WITH FROSTING AND DEFROSTING
… of the heat exchanger. The frosting and defrosting models developed in the thesis are integrated into this heat exchanger model, allowing more accurate performance assessment of heat pumps. Meanwhile, an advanced low-order moving boundary heat exchanger model is developed with switched …
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Impact of heat exchanger surface wettability on condensation, frosting, and defrosting performance under practical testing conditions
… particularly problematic, as it forces frequent defrosting cycles that restore performance only at the expense of significant efficiency losses. Reducing the impact of condensation and frost on system operation is therefore critical to lowering energy demands and improving reliability across …
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Modeling and Numerical Investigation of Hot Gas Defrost on a Finned Tube Evaporator Using Computational Fluid Dynamics
Defrosting in the refrigeration industry is used to remove the frost layer accumulated on the evaporators after a period of running time. It is one way to improve the energy efficiency of refrigeration systems. There are many studies about the defrosting process but none of them use computational …
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The performance of a reversible R744 vapor compression system with an internal heat exchanger in continuous frosting/ defrosting cycles
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01
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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 …
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An air-to-air heat pump
… encountered with air-to-air heat pumps is the defrosting of the outside coil. Several methods were outlined but the best solution for defrosting the coil would depend upon the conditions pertaining to each unit. Several suggestions were outlined where research is needed for the proper …
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Energy consumption of refrigerators as affected by selected consumer practices
… the use of an energy-saver switch; and the defrosting process all increased the energy consumption of the refrigerators. Operating the refrigerator near a heat source did not affect energy consumption to the extent of the other tests. Due to inconsistent results, the effect of frost …
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Windshield Defrost and Deice Using Carbon Nanotube Composite
… conductive film heater, particularly for defrosting or deicing windshields, and can also be applied to other surface types that need instant heating. This research can replace conventional heaters, Indium Tin Oxide (ITO), which are fabricated either by dielectrophoresis or piece-wise …
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Investigation of gas engine driven heat pump systems
… of the plant. An original fluidised bed defrosting mechanism is proposed, which prevents the build-up of this frost, and also improves system performance. Criticisms have been levelled against the rotary sliding vane compressor, in particular the effects of lubrication, which is …
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Experimental Analysis of Heat Generation in Carbon
… for heating applications such as deicing and defrosting. Further, this study also discusses the limitations and improvements needed in experimentation process that could yield high performance CNT based heaters. The fabricated CNT films show fast heating and cooling rate at a low driving …
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Commercial Electric Vehicle Cabin Heating System Modelling and Optimization
… energy demands such as cabin heating and window defrosting, which draw considerable power directly from the traction battery, thereby reducing the available driving range. Heat pump (HP) systems provide an energy-efficient alternative to resistive heating by utilizing recovered waste heat. …
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Assessment of consumers' knowledge, attitudes, awareness, and beliefs of food handling and beef safety handling behaviors
… storage, refrigerator temperature knowledge, defrosting behaviors, meat washing, and meat preparation behaviors. Collectively, the mixed methods research design provided insight into specific demographic characteristics related to consumer attitudes, beliefs, and behaviors surrounding beef …
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The design of refrigeration equipment for low temperature testing rooms
… encountered, such as load determination, defrosting, lubrication, refrigerant selection, proper staging, and control selection, have been similar, but the solutions have been different. Moore, Gellalles, and Young state: "Experience has shown that research requirements change so quickly …
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Phase change phenomena on water repelling and biphilic surfaces
This Dissertation was approved for publication on 2019-04-10 at 09:54.
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Scalable manufacturing and durability characterization of functional surfaces for condensation and anti-frosting purposes
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms