In the summer, have you ever been in a swimming pool and felt very cold standing in the sun? This is because the skin is the evaporation of water. The air by water vapor, and with him some of the warmth of the skin.
This is similar to what happens in older refrigerators. Instead of water, but the refrigerator uses chemicals to raffreddamentomento.
There are two things that must COanerkannt gecools.
1. A gas is cooled by the expansion.
2. When there are two things that are different temperatures that are on or in close proximity to one another, the surface cools and heats hotter the surface cold. E 'a law of physics, the second law of thermodynamics.
Old Refrigerators
Look on the back or underside of an old refrigerator, you will see a long, thin tube that bouclesretour. Or quest line with a pumpBe issued by an electric motor.
Inside the tube is Freon, a type of gas. Freon is the trade name of the gas. This gas, chemically is Floure-chloro-carbon or CFC. This gas is harmful to the environment in case of loss of refrigeration. So, now, other chemicals, in a slightly different (see next section).
CFC starts as líquido. Lepompe pushes the CFC through a lot of roll surface in the freezer. It is a chemical vapor. If er doing that absorbs the heat may be some in the freezer compartment. As here, the coils are cold and the freezer starts to cool.
In the regular part of the refrigerator, the number of coils and a larger room. Therefore, less heat is dissipated by the coils and the CFC sipaura.
Pompesuce CFC as a vapor and forces through the thin tubes are on the outside of the refrigerator. InKompression the CFC in a liquid and the heat, and from the air around them. Therefore könnte a po 'di guerramer behind or under the fridge.
Once the CFC through the outside coils, the liquid is ready to go back through the freezer and the refrigerator again and again.
Oggiourd'hui, refrigerators
Modern refrigerators do not use CFCs. Instead they use ammonia. Ammonia is a liquid, währendund cooling to -27 degrees Fahrenheit (-6.5 degrees Celsius).
A gas engine and compressor pushes the ammonia. When heateding compressed gas under pressure. Once the gas through the coils on the back or underside of a modern refrigerator, the hot ammonia gas can lose its heat to the air.
Remember the law of thermodynamics.
As it cools, the ammonia gas can be in liquid ammonia, because they are under pressure.
The liquid ammonia flows through a so-called governor, a small hole, which is the liquid that passes. Between the valve and the compressor, givet is an area of low pressure by compression Deo, to the ammonia on the page.
If leammoniac liquicolpisce a zone of depression, returns and changes in the gas. This is called spraying.
The coil then passes through the freezer and refrigerator, in which the ammonia in the cold bobina pulls the heat from the departments. This makes the inside of the fridge freezer and all the cold.
Inhalation of Ammonia Refrigeration Compressor, gas and from the GLEument procedure again and again.
Since the temperature inside durester?
UNF called thermocouple (it's basically a thermometer) is useful when the temperature of the refrigerator is cold you want it. When it reaches this temperature, the device turns off the compressor Stromfür.
But the refrigerator is not completely closed. There are places, such as ports and through the pipes, which are lost. "
So if the cold in the fridgeand begins to lose ade filtracionsil heat the thermocouple, the compressor turns on again, the refrigerator door.
For this reason, your refrigerator compressor motor coming on, running for a while and then the time for themselves.
Today, KühlschrankITERATUR however, are very energy efficient. Today, approximately one tenth of the amount of electricity, built 20 years ago. So if you mêmeJan is an old, old refrigerators, and better to buy a new, as it m.Ney saves (and energy) for a long period of time.
Further information can be found at:
• Argon National Laboratory - Ask a question (http://newton.dep.anl.gov/newton/askasci/1993/eng/ ENG30.HTM)
• Mr. Hand's 8th Science Class Site (www.mansfieldct.org / schools / mms / staff / main / heatrefrig.htm)
• How Stuff Works - Refrigerator (www.howstuffworks.com / refrigerator.htm)
• Science Treasure - refrigerator page (www.education.eth.net / Acad / treasure_trove / refrigerator.htm)
This is similar to what happens in older refrigerators. Instead of water, but the refrigerator uses chemicals to raffreddamentomento.
There are two things that must COanerkannt gecools.
1. A gas is cooled by the expansion.
2. When there are two things that are different temperatures that are on or in close proximity to one another, the surface cools and heats hotter the surface cold. E 'a law of physics, the second law of thermodynamics.
Old Refrigerators
Look on the back or underside of an old refrigerator, you will see a long, thin tube that bouclesretour. Or quest line with a pumpBe issued by an electric motor.
Inside the tube is Freon, a type of gas. Freon is the trade name of the gas. This gas, chemically is Floure-chloro-carbon or CFC. This gas is harmful to the environment in case of loss of refrigeration. So, now, other chemicals, in a slightly different (see next section).
CFC starts as líquido. Lepompe pushes the CFC through a lot of roll surface in the freezer. It is a chemical vapor. If er doing that absorbs the heat may be some in the freezer compartment. As here, the coils are cold and the freezer starts to cool.
In the regular part of the refrigerator, the number of coils and a larger room. Therefore, less heat is dissipated by the coils and the CFC sipaura.
Pompesuce CFC as a vapor and forces through the thin tubes are on the outside of the refrigerator. InKompression the CFC in a liquid and the heat, and from the air around them. Therefore könnte a po 'di guerramer behind or under the fridge.
Once the CFC through the outside coils, the liquid is ready to go back through the freezer and the refrigerator again and again.
Oggiourd'hui, refrigerators
Modern refrigerators do not use CFCs. Instead they use ammonia. Ammonia is a liquid, währendund cooling to -27 degrees Fahrenheit (-6.5 degrees Celsius).
A gas engine and compressor pushes the ammonia. When heateding compressed gas under pressure. Once the gas through the coils on the back or underside of a modern refrigerator, the hot ammonia gas can lose its heat to the air.
Remember the law of thermodynamics.
As it cools, the ammonia gas can be in liquid ammonia, because they are under pressure.
The liquid ammonia flows through a so-called governor, a small hole, which is the liquid that passes. Between the valve and the compressor, givet is an area of low pressure by compression Deo, to the ammonia on the page.
If leammoniac liquicolpisce a zone of depression, returns and changes in the gas. This is called spraying.
The coil then passes through the freezer and refrigerator, in which the ammonia in the cold bobina pulls the heat from the departments. This makes the inside of the fridge freezer and all the cold.
Inhalation of Ammonia Refrigeration Compressor, gas and from the GLEument procedure again and again.
Since the temperature inside durester?
UNF called thermocouple (it's basically a thermometer) is useful when the temperature of the refrigerator is cold you want it. When it reaches this temperature, the device turns off the compressor Stromfür.
But the refrigerator is not completely closed. There are places, such as ports and through the pipes, which are lost. "
So if the cold in the fridgeand begins to lose ade filtracionsil heat the thermocouple, the compressor turns on again, the refrigerator door.
For this reason, your refrigerator compressor motor coming on, running for a while and then the time for themselves.
Today, KühlschrankITERATUR however, are very energy efficient. Today, approximately one tenth of the amount of electricity, built 20 years ago. So if you mêmeJan is an old, old refrigerators, and better to buy a new, as it m.Ney saves (and energy) for a long period of time.
Further information can be found at:
• Argon National Laboratory - Ask a question (http://newton.dep.anl.gov/newton/askasci/1993/eng/ ENG30.HTM)
• Mr. Hand's 8th Science Class Site (www.mansfieldct.org / schools / mms / staff / main / heatrefrig.htm)
• How Stuff Works - Refrigerator (www.howstuffworks.com / refrigerator.htm)
• Science Treasure - refrigerator page (www.education.eth.net / Acad / treasure_trove / refrigerator.htm)
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