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Freezers use the Second Law of Thermodynamics. Firstly, modern refrigerators don't use CFC because CFCs are harmful to the atmosphere if released. Instead they use another type of gas called HFC-134a, also called tetrafluoroethane. HFC turns into a liquid when it is cooled to -15.9 degrees Fahrenheit (-26.6 degrees Celsius). A motor and compressor squeezes the HFC. When it is compressed, a gas heats up as it is pressurized. When you pass the compressed gas through the coils on the back or bottom of a modern refrigerator, the warmer gas can lose its heat to the air in the room. Remember the law of thermodynamics. As it cools, the HFC can change into a liquid because it is under a high pressure. The liquid flows through what's called an expansion valve, a tiny small hole that the liquid has to squeeze through. Between the valve and the compressor, there is a low-pressure area because the compressor is pulling the ammonia gas out of that side. When the liquid HFC hits a low pressure area it boils and changes into a gas. This is called vaporizing. The coils then go through the freezer and regular part of the refrigerator where the colder liquid in the coil pulls the heat out of the compartments. This makes the inside of the freezer and entire refrigerator cold. The compressor sucks up the cold gas, and the gas goes back through the same process over and over.
What else can I help you with?
Can I keep my freezer in the garage in the winter?
Your freezer operates on the basic principles of the refrigeration cycle. Your freezer does not make cold, it removes heat from the cabinet space. That heat is then discharged to the outside of the unit via a set of coils (either on the back or bottom of the unit). This cycle should keep the operating components of your freezer operating well throughout the winter months.
What is the purpose of the defrost cycle in a freezer?
The purpose of the defrost cycle in a freezer is to prevent the buildup of ice and frost on the evaporator coils, which can reduce the efficiency of the freezer and make it harder for it to maintain a consistent temperature.
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What is the purpose of the freezer defrost cycle and how does it help maintain the efficiency of the appliance?
The purpose of the freezer defrost cycle is to remove ice buildup inside the freezer. This helps maintain the efficiency of the appliance by preventing excessive ice from forming, which can reduce the freezer's ability to cool properly and increase energy consumption.
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What component is used to control the defrost cycle in a domestic freezer?
A defrost timer is typically used to control the defrost cycle in a domestic freezer. This timer switches the freezer from cooling mode to defrost mode at set intervals to prevent ice build-up.
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Operating cycle is the time which required by the business from acquiring inventory to production and selling of products and generating revenue.
What is the operating cycle of a merchandising business?
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Explain what is meant by the fetch-execute cycle and describe its action in RLT?
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