The refrigerator works by using a cycle of compression and expansion on the Freon. Work is done on the Freon by a compressor, and the Freon releases heat to the air outside of the refrigerator (as it undergoes the exothermic condensation from a gas to a liquid).
How does a refrigerator work step by step?
How does a refrigerator work in thermodynamics?
How they work. According to the Second Law of Thermodynamics, heat will always flow spontaneously from hot to cold, and never the other way around. A refrigerator causes heat to flow from cold to hot by inputting work, which cools the space inside the refrigerator.
How does a refrigerator work in 3 steps?
To put it simply there are 3 steps by which a refrigerator or a fridge works: Cool refrigerant is passed around food items kept inside the fridge. Refrigerant absorbs heat from the food items. Refrigerant transfers the absorbed heat to the relatively cooler surroundings outside.
How does a fridge work simple explanation?
Refrigerators work by causing the refrigerant circulating inside them to change from a liquid into a gas. This process, called evaporation, cools the surrounding area and produces the desired effect. You can test this process for yourself by taking some alcohol and putting a drop or two on your skin.
Which law is used in refrigerator?
According to the second law of thermodynamics: “It is impossible for a self-acting machine unless energy is provided by any external agency, to transfer heat from a body having lower temperature to another at a higher temperature”. This is the basic principle used for the working of a refrigerator.
What is the first principle of refrigeration?
Compression is the first step in the refrigeration cycle, and a compressor is the piece of equipment that increases the pressure of the working gas. Refrigerant enters the compressor as low-pressure, low-temperature gas, and leaves the compressor as a high-pressure, high-temperature gas.
What type of energy is a refrigerator?
Answer and Explanation: Refrigerators use electricity, which is then turned into kinetic energy by fans.
What is the first law of refrigeration?
First law of Thermodynamics: Between any two equilibrium states, the change in internal energy is equal to the difference of the heat transfer into the system and work done by the system.
How is heat transferred in a refrigerator?
Refrigerators operate using convection by circulating the gas through the copper lines inside of the refrigerator or freezer compartment. The lines, and the gas contained within them, absorb the heat contained in the refrigerator and freezer compartments, and are circulated back outside of the unit.
Which gas is formed in refrigerator?
The ammonia is used in the refrigerator to cool the water. Ammonia is composed of one atom of nitrogen and three atoms of hydrogen.
What gas is in a fridge?
The type of F gas usually found in fridges and freezers is hydrofluorocarbon ( HFC ) gas.
What are the 5 parts of refrigerator?
The main working parts of a refrigerator include a compressor, a condenser, an evaporator, an expansion valve, and a refrigerant.
How do fridges stay cold?
Refrigerators use the principles of pressure, condensing and evaporation of a fluid in a closed circuit to remove heat and reduce the temperature inside the fridge.
Why compressor is used in refrigerator?
The compressor is used in commercial refrigeration by letting the refrigerant run the circuit. The compressor plays a role in the system like a heart in a living creature’s body. The power comes from the electric motor fixed in the system. This process eases the pressure on the refrigerant’s system.
Why the fridge is not cold but the freezer is?
The most common cause for this condition is a problem with the defrost system. If the refrigerator freezer is cold but the refrigerator is warm, the evaporator fan motor might have failed. Every refrigerator has a set of coils called an evaporator. These are the coils that get cold.
How do fridges and freezers work?
By compressing and depressurising refrigerant, fridges create cool air which is then circulated to keep food fresh. Fridges help preserve food by removing the heat from the inside of the appliance. In a similar manner to a freezer, a fridge uses the process of evaporation to keep food fresh.
What is the function of refrigerator?
The fundamental reason for having a refrigerator is to keep food cold. Cold temperatures help food stay fresh longer. The basic idea behind refrigeration is to slow down the activity of bacte- ria (which all food contains) so that it takes longer for the bacteria to spoil the food.
How does gas cool a fridge?
The sealed system of a propane-powered fridge holds water, liquid ammonia, and hydrogen gas. A propane flame heats the water and ammonia to its boiling point in what is called the generator. The now-gaseous material then rises into a condensing chamber where it cools and returns to a liquid state.
Which law of thermodynamics does a cooling system apply?
Second Law: Refrigerator Second Law of Thermodynamics: It is not possible for heat to flow from a colder body to a warmer body without any work having been done to accomplish this flow. Energy will not flow spontaneously from a low temperature object to a higher temperature object.
What are the 4 process of refrigeration?
A refrigeration cycle has four major components: the compressor, condenser, expansion device, and evaporator. Refrigerant remains piped between these four components in the refrigerant loop.
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.
What is the cycle of refrigeration?
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 energy transformation occurs in a refrigerator?
Types of energy transformation in a Refrigerator. The energy source is electrical power, which would then produce kinetic energy to work the pumps, which would circulate the refrigerant. This reduces the heat in the fridge, increasing the external heat. The wasted energy of the the fridge would be heat and sound.
Does refrigerator produce heat?
Refrigerators generate heat during the process of making cold air. In order to cool this heat down, heat dissipation pipes are installed on both outer walls of the refrigerator, so when the product is operated, heat is generated on the side walls of the refrigerator.