So How Exactly Does A Freezer Work?

In the summer, perhaps you have gotten from a pool and then felt very cold standing in-the sun? That is as the water on your skin is evaporating. The air carries off the water vapor, and with it a number of the heat will be removed from the skin.

That is much like what goes on inside older appliances. Instead of water, though, the ice box uses chemicals to complete the cooling.

You will find a couple of things that require to be known for refrigeration. Visit source to discover how to acknowledge this enterprise.

1. A gas cools on expansion.

2. When you yourself have a few things that are different conditions that contact or are near each other, the warmer surface cools and the cooler surface warms up. This is a law of physics called the Next Law of Thermodynamics.

Old Appliances

If you look at the back or base of an older icebox, you'll view a long thin tube that curls back and forth. This tube is linked to a pump, that is driven by an electric motor.

In the tube is Freon, a form of fuel. Freon may be the brand-name of the gas. This gas, chemically is named Chloro-Flouro-Carbon or CFC. This gas was found to hurt the environment if it escapes from refrigerators. So now, other chemicals are utilized in a somewhat different approach (see next section below).

CFC starts out as a liquid. The pump pushes the CFC through a lot of rings within the freezer area. There the chemical turns to a vapor. When it does, it soaks up some of the temperature that could be in the freezer compartment. Because it does this, the coils get colder and the freezer begins to get colder.

In the part of the refrigerator, there are a larger space and fewer rings. Therefore, less heat is assimilated by the rings and the CFC vapor.

The pump then sucks the CFC as a vapor and forces it through pipes that are on the outside the fridge. By modifying it, the CFC turns back to a liquid and heat is given off and is consumed by the air around it. That is why it might be a little warmer behind or under your refrigerator.

The fluid is ready to return back through the fridge and freezer over and over, after the CFC passes through the outside rings.

Today's Appliances

Modern appliances don't use CFC. Alternatively they use ammonia gas. Ammonia gas can become a liquid if it is cooled to -27 degrees Fahrenheit (-6.5 degrees Celsius).

A motor and compressor squeezes the ammonia gas. When it's compressed, a gas gets hot as it's condensed. The hot ammonia gas may lose its heat to the air in the area, once you move the compressed gas through the rings on the back or bottom of a modern fridge.

Remember what the law states of thermodynamics.

As it cools, the ammonia gas can transform into ammonia liquid since it is under a top pressure.

The ammonia liquid flows through what's called an expansion valve, a little small gap the liquid has to fit through. In the event people wish to dig up supplementary information on clicky, there are many online libraries you should think about investigating. Between the compressor and the valve, there is an area as the compressor is taking the ammonia gas out of that area.

When the liquid ammonia gets a low-pressure area it boils and changes into a gas. This can be called vaporizing.

The rings then go through the fridge and normal part of the refrigerator where the colder ammonia in the coil pulls the heat from the chambers. Discover new information on FrienditePlus - Blog View - Discount Auto Parts: four Techniques to Save! by visiting our surprising URL. This makes the inside of the fridge and total refrigerator cold.

The cold ammonia gas is sucked up by the compressor, and the gas extends back through the exact same procedure over and over. To research more, please consider peeping at: get ex back: A Safer Way to Recover Broken Partitions.

How Does the Heat Remain the Inside?

A tool called a thermocouple (it's generally a thermometer) can sense when the temperature in the fridge is as cool as you desire it to be. When it reaches that temperature, the electricity is shut off by the device to the compressor.

But the ice box isn't com-pletely closed. You will find places, like around the doors and that will flow slightly, where the pipes proceed through.

When the cold from inside the refrigerator starts to flow out and the warmth leaks in, the thermocouple turns the compressor back on to cool the refrigerator off-again.

That's why you'll hear your fridge compressor motor coming o-n, working for a little while and then turning itself off.

Today's appliances, nevertheless, are extremely energy efficient. Ones sold to-day use about one-tenth the quantity of electricity of ones that have been built 20 years ago. So, for those who have an old, old refrigerator, it's better to purchase a new one because you'll spend less (and power) over an extended time period.

To learn more go to:

Argone National Laboratory - Ask A Scientist (

Mr. Hand's 8th Grade Science Site (

How Stuff Works - Fridge (

Science Treasure-trove - icebox page (
Topic revision: r1 - 2014-05-12 - LeeanN388p
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