The refrigeration cycle basically involves the movement of refrigerant from one place to the next and in different forms with the ultimate goal of pulling down temperatures whether in a cabinet, counter or even cold room format.
What is meant by refrigeration cycle?
a reverse thermodynamic cycle whereby heat is transferred from a body with a lower temperature to a body with a higher temperature owing to the expenditure of work. Refrigeration cycles are used in refrigerating machines and in gas refrigerators.
What is the basic refrigeration system?
Mechanical refrigeration is accomplished by continuously circulating, evaporating, and condensing a fixed supply of refrigerant in a closed system . ... Evaporation occurs at a low temperature and low pressure while condensation occurs at a high temperature and high pressure.
What are the 4 cycles 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 is the most common refrigeration cycle?
The vapor-compression refrigeration cycle has four components: evaporator, compressor, condenser, and expansion (or throttle) valve. The most widely used refrigeration cycle is the vapor-compression refrigeration cycle.
What are the main components of a refrigerator?
- The compressor.
- The condenser.
- The expansion device.
- The evaporator.
Is refrigerant liquid or gas?
The refrigerant, a chemical compound that changes easily from liquid to a gas . When the refrigerant is pushed into the compressor, it is a low pressure gas.
What is the process of refrigeration?
Refrigeration, or cooling process, is the removal of unwanted heat from a selected object, substance, or space and its transfer to another object, substance, or space . Removal of heat lowers the temperature and may be accomplished by use of ice, snow, chilled water or mechanical refrigeration.
How many types of refrigeration cycle are there?
4 Types of Refrigeration Systems.
What are the three major refrigerant lines?
The suction line connects the evaporator to the compressor , the discharge line connects the compressor to the condenser, and the liquid line connects the condenser to the expansion device.
Why is the refrigeration cycle called a cycle?
It has the maximum efficiency for a given temperature limit . Since it is a reversible cycle, all four processes can be reversed. This will reverse the direction of heat and work interactions, therefore producing a refrigeration cycle.
What is COP formula?
COP = |Q| W . COP is defined as the relationship between the power (kW) that is drawn out of the heat pump as cooling or heat, and the power (kW) that is supplied to the compressor.
What are the basic components of a refrigerator and their functions?
- Condenser. Condensation changes gas to a liquid form. ...
- Compressor. The compressor’s use is to pull the low-temperature and low-pressure vapour from the evaporator, through a suction line. ...
- Evaporator. ...
- Expansion Valve.
What is the function of the 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.
Which gas is used in fridge?
The ammonia is used in the refrigerator to cool the water. Ammonia is composed of one atom of nitrogen and three atoms of hydrogen. Sulfur dioxide and non-halogenated hydrocarbons are some of the common refrigerants used.
Which refrigerants are banned?
The hydrocarbon refrigerants propylene R1270 and R443A have been banned for new residential and light commercial air conditioning and heat pumps, cold storage warehouses, centrifugal chillers, and positive displacement chillers.
