Working of Stirling Engines

Stirling Engine is engine which operates on heat.In figure as shown it can operate on heat of our hand.It produces energy by temperature difference of upper plate and lower plate. It also runs in bright sun light. Amaze your friends...........

Ads : eBay ebay.com ebay.de

        Amazon 

Hydraulic Disk Brake

The Hydraulic Disk brake is an arrangement of braking mechanism which uses brake fluid, which is ethylene glycol,for transferring pressure from the controlling mechanism to the braking mechanism.

In 1914 Fred Duesenberg started hydraulic brakes on his racing cars. In 1918 Malcolm Lougheed developed a hydraulic brake system.

WORKING :

1. In Disk Break System, It uses the wheel disc with the inner arrangement of master cylinder and brake pad as well as return spring arrangement.

2. The air from the compressor is used to operate the master cylinder at the certain pressure, here the solenoid valve is used to operate the master cylinder and it is controlled by the control unit.

3. when ever the brake apply the control unit will activate the solenoid valve to supply the sir from the compressor and it passed through the master cylinder then it will ex tern the piston rod which is inside of the master cylinder after releasing the control unit activate the solenoid valve to stop the supply from the compressor, then the master cylinder will released the piston rod to the original position.

IMAGE OF HYDRAULIC DISK BRAKE :

                       

 Ads :

 eBay Store for shopping India 
 ebay.fr for france

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.

 Advertisement :

 eBay store ebay
 ebay.co.uk for UK 
 ebay.fr for france

Working of chimaney

Chimney :

All chimneys work on principle of something called an updraft. Some are as small as a two-inch pipe and others are so large.

Updraft is an airflow that rises bottom to top. A pressure difference creates this updraft. This pressure difference is created by the inside of the chimney being sealed from the outside air.

These are some conditions that chimney configuration has to met:

1. All chimneys must extend a certain distance above the roof line of a house or building. If this does occur a wind will cause the chimney to downdraft back into the house and create a reverse flow of the exhausting gas. 

2.This can be seen when a fireplace blows smoke out of the front of the opening or when a wood stove puffs back smoke. 

3.If the chimney is properly constructed and you still notice a small downdraft it may be clogged. 

4.This is also a very good indication that it may be time to have the chimney cleaned or swept as the creosote is building up inside and impeding the airflow.

Ads : eBay lets buy somthing