So How Exactly Does A Freezer Work?
De BISAWiki
So How Exactly Does A Freezer Work?
In the summertime, perhaps you have gotten out of a pool and then felt cold standing in the sun? That is as the water in your skin is evaporating. The air carries off-the water vapor, and with it a few of the heat has been taken away from the skin.
That is much like what goes on inside older refrigerators. Rather than water, though, the refrigerator uses chemicals to accomplish the cooling.
There are a couple of things that need to be known for refrigeration.
1. If you have an opinion about reading, you will perhaps fancy to learn about Jimmy Does That! » Keyless Door Lock Batteries. A gas cools o-n expansion.
2. When you have two things that are different conditions that contact or are near one another, the hotter surface cools and the surface warms up. It is a law of physics called the Next Law of Thermodynamics. This tasteful official site encyclopedia has a myriad of ideal suggestions for the purpose of it.
Old Refrigerators
If you look at the back or base of an older refrigerator, you'll see a long thin tube that loops back and forth. This tube is connected to a pump, which will be driven by an electric motor.
Inside the tube is Freon, a form of fuel. Freon could be the brand of the fuel. This fuel, chemically is named Chloro-Flouro-Carbon or CFC. This gas was found to harm the environment if it leaks from appliances. So now, other chemicals are utilized in a slightly different process (see next section below).
CFC starts as a fluid. The pump pushes the CFC via a lot of circles in the freezer area. There the substance turns into a vapor. When it does, it soaks up a number of the heat that could be in-the freezer compartment. Since it does this, the rings get colder and the fridge begins to get colder.
In the part of your icebox, there are fewer rings and a more substantial room. So, less heat is soaked up by the circles and the CFC vapor.
The pump then sucks the CFC as a vapor and makes it through finer pipes that are on the beyond the fridge. Get further on this related use with by navigating to fiore capture his heart: Buying an Automatic Share Cleaner. By modifying it, the CFC turns back in a liquid and temperature is given off and is absorbed by the air around it. That is why it may be a little hotter behind or under your refrigerator.
When the CFC passes through the outside rings, the fluid is able to go back through the freezer and fridge over and over.
Today's Appliances
Modern appliances don't use CFC. Alternatively they use ammonia gas. Ammonia gas turns into a liquid when it is cooled to -27 degrees Fahrenheit (-6.5 degrees Celsius).
A motor and compressor pushes the ammonia gas. A gas gets hot as it is condensed, when it's compressed. The hot ammonia gas may lose its heat to the air in the room, whenever you go the compressed gas through the coils on the back-or bottom of a contemporary ice box.
Remember what the law states of thermodynamics.
As it cools, the ammonia gas can alter into ammonia water since it's under a high pressure.
The ammonia liquid flows through what's called an expansion valve, a tiny little hole the liquid must squeeze through. Between the compressor and the valve, there's a low-pressure area because the compressor is pulling the ammonia gas from that part.
It boils and changes into a gas once the liquid ammonia strikes a low pressure area. This is called vaporizing.
The rings then undergo the freezer and regular part of the freezer where the ammonia in the coil pulls the heat from the chambers. This makes the interior of the fridge and total refrigerator cold.
The compressor sucks up the cool ammonia gas, and the gas dates back through the same process over and over.
How Does the Heat Remain the Sam-e Inside?
A tool called a thermocouple (it's generally a thermometer) can sense if the temperature in the refrigerator is as cold as you would like it to be. When it reaches that temperature, the system shuts off the energy for the compressor.
Nevertheless the fridge is not completely sealed. You will find places, like round the doors and where the pipes proceed through, that can flow a little bit.
Then when the cold from inside the refrigerator begins to the warmth leaks in and flow out, the thermocouple turns the compressor back onto cool the refrigerator off-again.
That's why you'll hear your ice box compressor engine coming on, working for a little while and then turning itself off.
Today's refrigerators, nevertheless, are extremely energy-efficient. Ones sold to-day use about one-tenth the amount of energy of ones that have been built two decades ago. So, for those who have an old, old icebox, it is better to buy a new one since you'll spend less (and power) over an extended time period.
To find out more go to:
Argone National Laboratory - Ask A Scientist (http://newton.dep.anl.gov/newton/askasci/1993/eng/ENG30.HTM)
Mr. I discovered details by browsing the Miami Guardian. Hand's 8th Grade Science Site (www.mansfieldct.org/schools/mms/staff/hand/heatrefrig.htm)
How Stuff Works - Refrigerator (www.howstuffworks.com/refrigerator.htm)
Technology Treasure Trove - fridge page (www.education.eth.net/acads/treasure_trove/refrigerator.htm).
