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Showing 1 to 11 of 11 for “"defrost"”.
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Cost Minimization for Hot Gas Defrost System
… the efficiency of refrigeration systems. Many defrost methods have been used and hot gas defrost is the most common for industrial refrigeration applications. However, it is not a simple task to run an efficient hot gas defrost system. The duration and frequency of the defrost cycle should be …
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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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Dynamic modeling and simulation of frost and defrost conditions for refrigeration systems
… capacity achievable, resulting in the need for defrost cycles. Much work has been done to date to establish strategies aimed at improving defrost decision making and allow for improved operational efficiency. Nonetheless, some of the most common methods still permit defrost to run when …
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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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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 …
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Energy consumption of refrigerators as affected by selected consumer practices
… a heat source were each performed on a manual-defrost refrigerator, a cycle-defrost refrigerator-freezer, and a no-frost refrigerator-freezer. A test involving the use of an energy-saver switch was performed on a no-frost refrigerator-freezer, and two tests related to the effect of frost …
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Microwave usage patterns among college students at Virginia Polytechnic Institute and State University
… a minute timer, variable power, automatic defrost, and touch controls. Students who would purchase a microwave in the future desired an average of 7.2 features, minute timer, variable power, automatic defrost, touch controls, clock, and delay start. The tasks that are currently being …
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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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Performance standards for walk-in coolers and freezers in the United States as a function of local weather conditions
… design, high efficiency lighting, hot gas defrost, evaporator fan controllers, etc. However, minimum efficiency standards for walk-in coolers and freezers have not yet been developed. Development of performance based standards for walk-in coolers and freezers is tantamount to establishing …
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The effect of surface wettability on frost growth and densification on flat plates
… after 2 hours of frosting. Repeated cycles of defrost and re-frost show the same behavior. As part of the effort to more fully understand wettability effects on frost growth, a mathematical model is developed. The coupled heat and mass diffusion equations are solved numerically, with special …
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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 …