Classification of refrigerants ppt
What are the classification of refrigerants?
There are four main groups of refrigerants and they are determined by their chemical constituents but are generally classified as Chlorofluorocarbons (CFCs), Hydro chlorofluorocarbons (HCFCs), Hydro fluorocarbons (HFCs) and Natural Refrigerants [7]. …
What are the 4 stages of refrigerant?
The Four Stages of Your Refrigerant Cycle
- Stage 1: Evaporator Coil. Your refrigerant’s journey begins at your evaporator coil, which is located inside the indoor unit in your home. …
- Stage 2: Compressor. …
- Stage 3: Condenser Coil. …
- Stage 4: Expansion Chamber.
What are the 3 types of refrigeration?
Here are the different types of refrigeration systems:
- Evaporative Cooling. Evaporative cooling units are also referred to as swamp coolers. …
- Mechanical-Compression Refrigeration Systems. Mechanical compression is used in commercial and industrial refrigeration, as well as air conditioning. …
- Absorption. …
- Thermoelectric.
What is refrigerant PPT?
“Refrigerant is the media (fluid) used for heat transfer in a refrigerating system that absorbs heat during evaporation from the region of low temperature and pressure, and releases heat during condensation at a region of higher temperature and pressure.” Read more. ANKIT SAXENA Asst. Prof. @
What is the basic principle of refrigeration?
The absorption of the amount of heat necessary for the change of state from a liquid to a vapor by evaporation, and the release of that amount of heat necessary for the change of state from a vapor back to the liquid by condensation are the main principles of the refrigeration process, or cycle.
What is basic refrigeration cycle?
Principles of Refrigeration
For this reason, all air conditioners use the same cycle of compression, condensation, expansion, and evaporation in a closed circuit. The same refrigerant is used to move the heat from one area, to cool this area, and to expel this heat in another area.
What is the meaning of R-22?
R-22 (also known as HCFC-22) is an ozone-depleting refrigerant which has been widely used in home air conditioning systems and its supply is now being phased out in response to the Montreal Protocol.
What are inorganic refrigerants?
Inorganic refrigerants consists of inorganic compounds (which does not contain carbon-hydrogen bond) used primarily as refrigerants such as R718, 717, and 744. Majority of these refrigerants are non-toxic and are environment friendly, inexpensive & non-flammable.
What are the 4 stages of vapor compression refrigeration cycle?
The Vapor Compression Refrigeration Cycle involves four components: compressor, condenser, expansion valve/throttle valve and evaporator. It is a compression process, whose aim is to raise the refrigerant pressure, as it flows from an evaporator.
How refrigerant flows through the system?
Refrigerant flows through the compressor, which raises the pressure of the refrigerant. Next the refrigerant flows through the condenser, where it condenses from vapor form to liquid form, giving off heat in the process.
How does refrigerant change states through each of the four major components of the refrigeration cycle?
The refrigerant enters the compressor as a low pressure superheated gas. The compressor compresses the gas, changing it to a high pressure superheated gas. Inside the condenser the gas begins to cool and change state in to a vapour.
What are the most commonly used refrigerants?
The most common type of refrigerants used today across the world are hydrofluorocarbons (HFCs). Previously, chlorofluorocarbons (CFCs) were more widely used, but were phased out following the introduction of the Montreal Protocol in 1987.
Why are refrigerants used?
Refrigerant is a chemical compound used in your air conditioner. It absorbs environmental heat and provides cool air once it runs through compressors and evaporators.
Is refrigerant a liquid or gas?
Refrigerant is a liquid chemical that has an amazing ability to absorb heat once converted from a gas to a liquid state. When the refrigerant changes from one state to another through pressurization and compression, it can then absorb the heat inside your home and expel it outside.
Which refrigerant is used in AC?
What type of refrigerant is used in air conditioning systems? There are many different types of refrigerant used in a variety of refrigeration products, but for air conditioning systems, there are two main types; R-22 or more commonly known as Freon, and R410A, also known as Puron.
Which refrigerant is good for AC?
R32 is quickly becoming the refrigerant of choice for many AC manufacturers, including Perfect Aire. While there are many reasons for this switch, the main benefits of R32 are: R32 has a GWP of 675, roughly 30% lower than that of R410A.
Which gas is used in AC?
Freon is a non-combustible gas that is used as a refrigerant in air conditioning applications. This freon undergoes an evaporation process over and over again to help produce cool air that can be circulated throughout your AC system.
Why R134a is not used in AC?
R134a has been found to have a lot of greenhouse gas potential, as it can end up in the atmosphere and take forever to break down. For that reason, all new vehicles sold in America after the year 2021 can no longer use this type of refrigerant.
Is CFC used in refrigerator?
CFCs have recently been phased out and newer refrigerators will not contain CFCs. In the 1980s it was a concern that fridges and freezers containing chlorofluorocarbons were destroying the ozone layer. The use of CFCs was phased out by 2000 under the Montreal Protocol.
Which gas is used in fridge?
-Tetrafluoroethane
Modern refrigerators usually use a refrigerant called HFC-134a (1,1,1,2-Tetrafluoroethane), which does not deplete the ozone layer, unlike Freon.