Skip to main content

300x250 Ads

Steam-Boilers

By Ashik
Boiler:
A boiler or steam generator is a device used to create steam by applying heat energy to water.
Fuel used in Boiler:
The source of heat for a boiler is combustion of any of several fuels, such as wood, coal, oil, or
natural gas. Electric steam boilers use resistance- or immersion-type heating elements. Nuclear
fission is also used as a heat source for generating steam. Heat recovery steam generators
(HRSGs)use the heat rejected from other processes such as gas turbines.
Types of Boiler:
There are several types of boiler. Among, few of them given below;

Fire tube boiler:In this type of boiler, boiler/ vessel is partially filled with water. The boiler is
equipped by the large no. of tubes through which fuel is being passed. During the fuel burning,
huge amount of heat generate and passes through the water and water vaporized. The following
figure is a fire tube boiler.







 Water tube boiler:This type of boiler is exactly same with fire tube boiler except that water is
passing through the pipes and fuel is burned into the vessel.









Download the pdf file

Labels:

Comments

Post a Comment

Popular posts from this blog

Propagation-Radio-Waves

By Ashik
Radio Wave Propagation types
Post a Comment
Read more

Armature Winding ,Pole Pitch, Coil Span, Commutator Pitch

By Ashik
Now we are going to discuss about armature winding in details. Before going through this section, we should understand some basic terms related to armature winding of dc generator . Pole Pitch Definition of Pole Pitch The pole pitch is defined as peripheral distance between center of two adjacent poles in dc machine. This distance is measured in term of armature slots or armature conductor come between two adjacent pole centers. This is naturally equal to the total number of armature slots divided by number of poles in the machine. If there are 96 slots on the armature periphery and 4 numbers of poles in the machine, the numbers of armature slots come between two adjacent poles centers would be 96/4 = 24. Hence, the pole pitch of that dc machine would be 24. As it is seen that, pole pitch is equal to total numbers of armature slots divided by total numbers of poles, this can alternatively referred as armature slots per pole . Coil Span or Coil Pitch Coil of ...
Post a Comment
Read more

Control Systems/Gain

By Ashik
What is Gain? Gain is a proportional value that shows the relationship between the magnitude of the input to the magnitude of the output signal at steady state. Many systems contain a method by which the gain can be altered, providing more or less "power" to the system. However, increasing gain or decreasing gain beyond a particular safety zone can cause the system to become unstable. Consider the given second-order system: We can include an arbitrary gain term, K in this system that will represent an amplification, or a power increase: In a state-space system, the gain term k can be inserted as follows: The gain term can also be inserted into other places in the system, and in those cases the equations will be slightly different.   Example: Gain Here are some good examples of arbitrary gain values being used in physical systems: Volume Knob On your stereo there is a volume knob that controls the gain of your amplifier circuit. Higher levels of v...
Post a Comment
Read more

Add