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

8255 Programmable Peripheral

By Ashik
8255 Programmable Peripheral Interface (PPI) Intel 8255A is a general purpose parallel I/O interface. The peripheral devices are slower than the microprocessor. PPI makes an inter-relation between microprocessor and peripheral devices. It provides three I/O port (Port A, Port B and Port C) and can be programmed as a) Simple Parallel I/O (No handshaking) b) Simple Strobe I/O (Use STB handshake) c) Single Handshake I/O (Use STB-ACK handshake) d) Double handshake I/O (Uses STB-ACK and STB-ACK) Handshaking and Handshaking Signal The making of inter relation between slower peripheral device and microprocessor is called handshaking. Before making the inter-relation between peripheral device and microprocessor the PPI send some signals to microprocessor and peripheral device to perform the process, these signals are called handshaking signal. 8255-based devices that perform handshaking support four handshaking signals: • Strobe Input (STB) • Input Buffer Full (IBF) • ...
Post a Comment
Read more

Add