Working of Refrigerators or freezers

Refrigerator is electric machine which is intended to provide cooling.Refrigeration is process of removing heat from enclosed space.It's all based on the following physics: - a liquid is rapidly vaporized (through compression) - the quickly expanding vapor requires kinetic energy and draws the energy needed from the immediate area - which loses energy and becomes cooler.

Main Parts Of Refrigerators :

1. Compressor
2 .Heat-exchanging pipes
3. Expansion valve
4. Heat-exchanging pipes
5. Refrigerant- the liquid

Working Of Refrigerators:

1. The compressor compresses the refrigerant gas used in the refrigerator. This compression increases the refrigerant’s temperature.

2. The outside coil or the heat exchanging pipes are then used to dissipate the heat of the refrigerant.

3. As the refrigerant become cool, it condenses into liquid form and flows through the expansion valve.

4. The liquid refrigerant is then allowed to move from a high-pressure zone to a low-pressure zone as it flows through the expansion valve. This makes the refrigerant expand and evaporate. The evaporation absorbs heat from refrigerant and turn the temperature down.

5. The heat exchanging pipes allows the refrigerant to absorb heat thus making the temperature inside the refrigerator drop. 

6. The cycle goes on and the refrigerator is able to keep things cold.

The whole cycle is shown below in image.

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Home Appliance Wind Turbine

The above image shows installation of wing turbine in home appliance.
Now a days use of energy become very effective using innovative technologies.This is one of them.

Electricity at home can be produced with small-scale wind turbines.Wind turbines collects the power of the wind and use it to generate electricity.Forty percent of all the wind energy in Europe blows over the UK. A typical system in an exposed site could easily generate more power than your lights and electrical appliances use.

Wind turbines use large blades to catch the wind. When the wind blows, it strike to blades ,the blades are forced to move in round, driving a turbine which generates electricity. The stronger the wind, the more electricity produced.

There are two types of domestic-sized wind turbine:

1. Pole mounted: The wind turbine and bled are mounted on free standing pole.capacity of 5kW to 6kW.

2. Building mounted: These are smaller than most mounted systems and can be installed on the roof of a home where there is a suitable wind resource. Capacity of 1kW to 2kW.

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