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Refrigerators, freezers, air conditioners, heat pumps(air and ground source) all work on the principles of refrigeration. Modern refrigerators don't use Chlorofluorocarbons because CFCs are harmful to the atmospheric ozone layer when released. Instead they use various other refrigerants that are now primarily Hydrofluorocarbons. In new refrigerators a gas called HFC-134a, also called tetrafluoroethane is used. HFC-134a turns into a liquid when it is cooled to -15.9 degrees Fahrenheit (-26.6 degrees Celsius).
A motor and compressor squeezes the gas (refrigerant). 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.
According to the laws of thermodynamics:
1) As it cools, the refrigerant will change into a liquid when it is under enough high pressure.
2) Something that is hot will give up its heat to its colder surroundings.
The liquid flows through what's called an expansion valve, a small hole that regulates how fast the liquid refrigerant squeezes through. Between the valve and the compressor, there is a low-pressure area because the compressor is pulling the gas out of that side (while compressing it on the other).
When the liquid HFC hits a low pressure area it boils and changes into a gas. This is called vaporizing. Remember that the refrigerant boils (or vaporizes) at minus 15.9 degrees F. That is always going to be colder than the surrounding air temperature in the fridge and even the freezer. Therefore, as the refrigerant within the coils (evaporator) passes through the freezer and regular part of the refrigerator, the colder liquid in the coils 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 to the compressor to start the process over. A thermostat regulates when the desired temperatures in the cold compartments have been reached by turning the compressor on or off.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoThe freezer absorbs heat energy in the freezer and dumps it outside of the freezer.
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∙ 12y agoit simply works on the phenomenon of joule's law of cooling....................
Wiki User
∙ 13y agoRefrigerator keep the food cool and fresh by convectional process.Due to conventional the rapid moving of hot and cool air is kept maintain.
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∙ 13y agofreon (a liquid) is evaporated, and when liquid evaporates, it takes heat from wherever it is.
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∙ 9y agoThe multiplication of microorganisms is reduced at low temperatures.
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∙ 15y agocuz it does
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Can you use ice to keep your room cold?
No. But if u have a freezer or fridge in ur room that would work
How can you keep a glow stick glowing?
put them in the freezer for an hour and then take them out and crack them
Could storing dead batteries in the freezer cause batteries to work for a short time?
No. If you took two batteries that were dead. Placed one in the freezer and one on a shelf. Waited a day and then took both of them out and put in a flash light. Both would show some life for a time and both would die about the same time. Its the chemical reaction that makes this happen not the cold. If you store good batteries in a cold area they are less likely to loose their charge than if you keep them in a warm drawer.
What keep things cold plastic wrap or aluminum foil?
Me personally I would say that plastic wrap keeps things colder because it keeps things better contained than aluminum foil. See aluminum foil rips easily than plastic wrap. So I would say plastic wrap.
Which container keep a drink cold for the longest period of time?
it is ice chest
What is the function of the freezer?
To keep things cold.
Why is freezer colder than the refrigerator?
The freezer is colder then the fridge because the freezer is to keep things frozen and the fridge is to keep things just cold. Somethings are meant to be frozen and if not then they get spoiled or ruined and same with the fridge.
Do frozen mice to to be in a freezer or a just a cold place?
I would assume a freezer since they're meant to keep things frozen. Also, "a cold place" is subjective.
How does a refrigerator of freezer work to keep things cold?
This gas in your refrigerator draws heat away and makes the objects cold
Keeping Things Cool with Refigerator Repair?
If you have a refrigerator that needs to be repaired, look at the simple things before getting a new refrigerator. Make sure there is enough coolant in the system to keep it cold and from not freezing up. If the freezer will not keep things frozen, take everything out clean the inside as well as the door of the freezer. Then set the temperature to the middle. In the summer condensation builds up on the door and will not keep the freezer cold.
What can keep a block of ice cold?
A freezer
How do you keep ice cold?
by putting it in the freezer...that makes it freeze and get cold...
Would a horizontal freezer keep cold air in better or a vertical freezer?
ues
How cold is the inside of a freezer?
The inside of a freezer is very hard to calculate! Although, I have calculated that it is about 15 to 31 degrees Celsius.
How do you keep a bag of ice cold?
put it in the fridge or freezer.
How do you keep eggplant fresh longer?
to keep it fresh longer you have to put it in the refrigarator
How does the refrigerator or freezer work yo keep things cold?
Refrigeration works by drawing heat away from the unit. It does this through a process of evaporation.
