A refrigerator is
an open system that dispels heat from a closed space to a warmer area
, usually a kitchen or another room. … Refrigerators appear to violate the Second Law of Thermodynamics, but the key reason they do not is because of the work needed as input to the system.
What is refrigeration thermodynamics?
Refrigeration systems operate on a
series of consecutive thermodynamic processes
that form a cycle that returns the working substance to the same state. A thermodynamic refrigeration cycle removes heat from a low-temperature object (refrigeration) and rejects it at a higher temperature.
What is a refrigerator?
A refrigerator is one of our most valuable household appliances. It
keeps food and drinks cool
, by pushing a liquid refrigerant through a sealed system, which causes it to vaporize, and draw heat out of the fridge. The vaporized refrigerant then is passed through coils outside the fridge (at the back or the bottom).
What is refrigerator and its function?
The Purpose of Refrigeration. 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.
What is refrigerator Short answer?
A refrigerator (colloquially
fridge
) is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature.
What is COP formula?
COP (Coefficient of Performance)
The Co-efficient of performance (COP) is an expression of the efficiency of a heat pump. When calculating the COP for a heat pump, the heat output from the condenser (Q) is compared to the power supplied to the compressor (W).
COP =
|Q| W
.
What are the four stages of refrigeration?
The refrigeration cycle contains four major components:
the compressor, condenser, expansion device, and evaporator
.
What’s the difference between fridge and refrigerator?
Fridge is just a smaller name for a
refrigerator
that is a cooling device used in households all over the world. Though fridge can be referred to as slang and a casual word, it has become so popular that more people make use of this word than those who take pains to call out refrigerator which is a rather long word.
What are the basic parts of refrigerator?
The main components of a refrigeration system are
the condenser, the compressor, the evaporator and the expansion valve
.
What are the disadvantages of refrigerator?
- Energy Requirements. Perhaps the biggest disadvantage of the refrigerator is the cost to run it. …
- Disposal Concerns. One of the disadvantages of refrigerators is that they are environmentally unfriendly and dangerous if not disposed of properly. …
- Common Repairs.
What are the 5 parts of the refrigerator?
In the refrigeration cycle, there are five basic components:
fluid refrigerant
; a compressor, which controls the flow of refrigerant; the condenser coils (on the outside of the fridge); the evaporator coils (on the inside of the fridge); and something called an expansion device.
Why is it called refrigerator?
The word refrigerator
originates from the Latin verb refrigerare
which was derived from the Latin adjective frigus, meaning cold.
Why is the refrigerator so important?
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 bacteria (which all food contains) so that it takes longer for the bacteria to spoil the food.
What is the first refrigerator?
1913. The first electric refrigerator for domestic use was invented by American Fred W. Wolf and was called
the Domelre
, or the DOMestic ELectric REfrigerator.
What is the working principle of refrigerator?
The main principle behind the refrigerator’s working is that
a gas or a liquid changes its temperature when forced through a capillary tube or an expansion valve, separately kept in an insulated system where no external heat transfer occurs
.
