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. … When you release the contents into the lower pressure open space, it turns from a liquid to a gas.
How does a fridge work step by step?
- 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.
What is domestic refrigeration?
A domestic refrigerator is essentially
a small cold storage where
several food products such as ice cream, meat, fish, milk, fruits, vegetables, water etc. … The condenser of small refrigerators are of natural convection type, while larger refrigerators may have a fan for forced air circulation over the condenser.
Which cycle is used by domestic refrigerator?
The most widely used refrigeration cycle is
the vapor-compression refrigeration cycle
. In an ideal vapor-compression refrigeration cycle, the refrigerant enters the compressor as a saturated vapor and is cooled to the saturated liquid state in the condenser.
What is the basic principle of refrigerator?
The basic principle of refrigeration is simple.
You simply pass a colder liquid continuously around the object that is to be cooled
. This will take heat from the object. In the example shown, a cold liquid is passed over an apple, which is to be cooled.
What is the purpose of domestic 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.
What do you call a fridge for drinks?
A beverage refrigerator, also known as a beverage cooler or beverage center
, is smaller than a traditional refrigerator. Because of the smaller size, the unit uses less energy which can save you money on your electrical bill. It is usually designed explicitly for holding cans and bottles.
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
What cycle does a fridge work?
The
refrigeration cycle
What are the four stages of refrigeration?
The refrigeration cycle
What are the two types of refrigeration?
- Mechanical-Compression Refrigeration Systems. The most widely used refrigeration cycle method is mechanical compression. …
- Absorption Refrigeration. …
- Evaporative Cooling. …
- Thermoelectric Refrigeration.
How are refrigerators classified?
Methods of refrigeration can be classified as
non-cyclic, cyclic, thermoelectric and magnetic
.
What is the precaution of refrigerator?
Refrigerate prepared food and leftovers within 2 hours of cooking
. Divide leftovers into small, shallow containers for quick cooling in the refrigerator. Cover when food is cooled. Don’t overload the refrigerator.
Which refrigerant are used in domestic refrigerator?
The
refrigerant R600a (Isobutane)
is widely used in domestic refrigerators and freezers.
What can damage a refrigerator?
- Overstocking/Understocking Causing Refrigerator Damage. …
- Forgetting to Clean the Coils. …
- Storing Leftovers Improperly. …
- Placing Your Fridge Too Close to the Wall. …
- Leaving the Door Open Too Long. …
- Not Checking the Drainage Hole.
Why food is kept in refrigerator?
Refrigeration slows bacterial growth
. Bacteria exist everywhere in nature. They are in the soil, air, water, and the foods we eat. When they have nutrients (food), moisture, and favorable temperatures, they grow rapidly, increasing in numbers to the point where some types of bacteria can cause illness.
