Why the shape of gas cylinder is cylindrical?
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Why the shape of gas cylinder is cylindrical?
Gas bottles are cylindrical or spherical because circular hoops can withstand internal pressure by pure tension in the tank material instead of bending. If the shape were not circular, then there would be bending stresses in the tank wall and it would not be able to withstand as much pressure without breaking.
What is the firing condition of water tube boiler?
A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.
What are the characteristics of fire tube boiler?
Types of Packaged Boilers
| Characteristic | Fire-tube (Scotch Marine) |
|---|---|
| Pressure range | Hot Water Low Pressure Steam HPS to 350 psig |
| Typical sizes | To 1500 hp |
| Typical applications | Heating Process |
| Best for | Most applications with steam pressures less than 350 psig |
Why are large boilers water tubes?
Larger heating surface can be achieved by using more numbers of water tubes. Due to convectional flow, movement of water is much faster than that of fire tube boiler, hence rate of heat transfer is high which results into higher efficiency.
Why are cylinders round?
As you might expect, pistons are subjected to more heat, pressure and movement than nearly any other engine part. Pistons that are elliptical, or shaped like ovals, become more circular when heat is applied. This allows for improved sealing when the cylinder meets the combustion chamber for greater efficiency.
What is the shape of a cylinder?
A cylinder is a three-dimensional shape in geometry. A cylinder is round and has a top and bottom in the shape of a circle. The top and bottom are flat and always the same size.
What is the difference between fire tube boiler and water tube boiler?
The firetube boiler passes combustion gas inside a series of tubes surrounded by water in a vessel to produce steam, while a watertube instead sends water through a series of tubes surrounded by combustion gas used to transfer heat energy and produce steam.
Why do fire tube boilers explode?
When fire tube boilers run low on water, the metal in the boilers shrinks. In such an instance, if cold water is sent into the boiler, the metal could quickly expand, causing an explosion.
Is generally used in locomotive boiler?
An artificial steam jet draught is present in this boiler for increasing the heat transfer rate. Generally used in railway locomotive engines and in Submarines.
What type of boiler is a Benson boiler?
water tube boiler
Benson Boiler is a water tube boiler. This is a drum-less and high-pressure boiler.
Why water tube boiler is more efficient?
Between the two types of boiler designs, water tube boilers are remarkably more efficient than their fire tube counterparts. This stems from a number of factors: Water turns to steam more quickly. When the water flows through the tube, it is surrounded by the heat source, rather than the other way around.
What are the advantages of water tube boilers?
Advantages of water-tube boilers:
- They have a small water content, and therefore respond rapidly to load change and heat input.
- The small diameter tubes and steam drum mean that much higher steam pressures can be tolerated, and up to 160 bar may be used in power stations.