What is the principle used in the working of a refrigerator?

How a refrigerator system works. 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.

What are the principal parts of refrigerator?

The 4 Main Refrigeration Cycle Components

• The compressor.
• The condenser.
• The expansion device.
• The evaporator.

Which thermodynamics process is present in refrigerator?

The convection is the most present process in the refrigeration equipment you may deal with. It occurs mainly in the fluids (Liquids and Gas). It is the result of a fluid circulation, which can happen either naturally, due to differences on the temperature of the fluid, or forced way.

What are 3 parts of a refrigerator?

Guide to the parts of a refrigerator

• Compressor. The compressor is essentially an engine.
• Condenser coils.
• Expansion Device.
• Evaporator coils.

How do refrigerators save electricity?

Follow these tips, and your refrigerator will be working smarter, not harder.

1. Choose or upgrade to an energy-efficient model.
2. Give your fridge a cool place and some room to breathe.
3. Keep the door closed.
4. Keep your fridge organised.
5. Keep your fridge full.
6. Store Food Properly.
7. Don’t put hot food in your refrigerator.

What cycle does a refrigerator work on?

Refrigerators and heat pumps are essentially the same device; they only differ in their objectives. Reversing the Carnot cycle does reverse the directions of heat and work interactions. A refrigerator or heat pump that operates on the reversed Carnot cycle is called a Carnot refrigerator or a Carnot heat pump.

Which law is used in refrigerator?

Second law of thermodynamics
Figure 1: According to the Second Law, all refrigerators must have work done on them in order for heat to flow from a cold body to a hot body.

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 used in refrigerator?

In modern refrigerators, Tetrafluoroethane R-134a, and Freon R-438A are the most common refrigerant gas used in India.

What is refrigerator compressor?

At its most basic level, a compressor is like a pump. Its job is to increase the pressure of the liquid refrigerant. It pulls in air and increases the pressure of the refrigerant that is driven through the system. The other two key pieces of the refrigerator system are the condenser coils and the evaporator coils.

What is refrigerator efficiency?

The efficiency of a refrigerator is based on the energy consumed per year for a given size. The efficiency of a refrigerator is expressed in volume cooled per unit electric energy per day. Volume is measured in cubic feet and electrical energy is measured in kilowatt hours.

What is the working principle of an ammeter?

The working principle of an ammeter depends on the current flowing along with its resistance. Very little impedance is used inside the ammeter as it must drop the least amount of voltage attached to it. The ammeter is connected to the series of circuits as the current in the series circuit is the same.

What is the difference between a voltmeter and an ammeter?

The voltmeter is connected in parallel to measure its voltages while the ammeter is connected in series to measure its amperage. In the heart of most analog meters is a galvanometer, an instrument that measures current flow using the movement or bend of a needle. 2. What are the applications of an ammeter?

What is the resistance of an ammeter?

This is also known as ammeter or ampere meter as it measures the current. The internal resistance of this device is usually ‘0’ which is also practically correct as it has a small amount of internal resistance. The measurement range of this instrument depends mainly on the resistance value.

Why is very little impedance used in ammeter?

Very little impedance is used inside the ammeter as it must drop the least amount of voltage attached to it. The ammeter is connected to the series of circuits as the current in the series circuit is the same. The main function of this tool is to measure the flow of current with the help of a set of coils.