in this power point presentation... a brief overview of the locomotive boiler and major application of this boiler has given.... it is very much useful for those who wants to know that basically what is locomotive boiler..... ?

1. CREATED BY: - PANKAJ KUMAR SHARMA
DEPARTMENT : - MECHANICAL
ENROLMENT NO. : - IIU/M.E/BT-10/1596
UNIVERSITY: - INDUS INTERNATIONAL UNIVERSITY
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2. What is a Boiler basically and a general difference
between a steam generator and boiler?
What is Locomotive Boiler?
Principle of Steam Locomotives.
Construction & Working of a Locomotive Boiler.
Specification of Locomotive boiler (Made at Chitranjan
Works India).
Advantages, Features & Disadvantages of Locomotive
Boiler.
Major application & statistics of locomotive used
locomotive boiler (
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3.  Boiler or steam generator is a device used to create
steam by applying heat energy to water.
 Boilers has its own specifications like steam rated, &
rated pressure.
 Generally, boilers use external fuel, whereas steam
generator might act as a exchanger of heat.
 Although the definitions are somewhat flexible, it can
be said that older steam generators were commonly
termed boilers worked at low to medium pressure (1300 psi/0.069-20.684 bar; 6.895-2068.427 kpa) but, at
pressures above this, it is more usual to speak of a
steam generators.
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4.  Locomotive boiler is the horizontal fire tube boiler in which hot gases pass through
the tubes and water surrounds them. Transferred heat from the gases to water and
then converted into steam. It may also be used as a stationary boiler.
 A locomotive boiler is the central part of the engine for any steam-powered
locomotive train. It is also defined as a steel shell containing water which is
converted into steam, by the heat of the fire in the firebox, to energy to move the
locomotive. Its main requirement is it should produce steam at a very high rate.
Therefore, this boiler requires a large amount of heating surface and large grate
area to burn coal at a rapid rate. . In order to provide the large heating surface area,
a large number of fire tubes are setup and heat transfer rate is increased by
creating strong draught by means of steam jet.
 Locomotive-type boilers are used in traction engines, steam rollers, & portable
engines.
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5. 5
 Steam locomotives operate by
converting heat energy into
mechanical energy.
 This requires a heat source, a
locomotive boiler to generate
steam
and
cylinders
converting the thermal energy
contained in steam to
mechanical energy, which can
be used to perform work.
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 The locomotive boiler consists of a cylindrical barrel with a rectangular fire box at
one end and a smoke box at the other end.
 The fire box is entirely surrounded by water except for the fire hole and the ash pit
which is situated below the fire box which is fitted with dampers at its front and
back ends. Dampers control the flow of air to grate.
 The generated hot gases pass from the fire box to the smoke box through a series
of fire tubes and then they are discharged into the atmosphere through the
chimney. Fire tubes are placed inside the barrel.
 Some of the tubes are of larger diameter and some of the tubes are of smaller
diameter. The superheater tubes are placed inside the fire tubes of larger diameter.
 A dome shaped chamber known as steam dome is fitted on the upper part of the
barrel, from where the steam flows through a steam pipe into the chamber. A
regulator is also fitted here to regulate the flow of steam.
 Superheated steam chamber is fitted to the right of the chimney, which collects the
superheated steam.
 Exhaust steam is discharged through the blast pipe to the chimney from the
cylinders.

8.  The coal is introduced through the fire
hole into the grate which is placed at the
bottom of the fire box.
 The hot gases which are generated are
deflected by an arch of fire bricks to heat
the walls of fire box properly.
 The heat of the hot gases is transmitted
into the water through the heating
surfaces of the fire tubes. The steam
generated is collected over the water
surface.
 The steam flow through a steam pipe from
the steam dome into the chamber. The
flow of steam is regulated by means of a
regulator.
 From the chamber steam passes through
the superheater tubes and returns to the
superheated steam chamber from which it
is led to the cylinders through pipes, one
to each cylinder.
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10. 
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Dimensions and Specifications of the locomotive boiler made at Chitranjan
Works in India are given below:
Barrel Diameter --------------- 2.095m
Length of the barrel ---------- 5.206m
Size of the tubes (superheater) – 14cm
No. of superheater tubes ----- 38
Size of ordinary tubes ---------- 5.72cm
No. of ordinary tubes ----------- 116
Steam Capacity ------------------- 9000 kg/h
Working Pressure ---------------- 14 bar
Grate Area ------------------------- 4.27 m2
Heating Surface ------------------- 271 m2
Efficiency --------------------------- 70%
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11.  Large rate of steam generation per square metre of heating
surface.
 Low cost of construction.
 Portability.
 Low installation cost because It is free from brickwork, special
foundation and chimney.
 It is very compact.
Pressure of steam is limited to 20 bar.
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12.  The evaporative capacity of this boilers is high compared with
other boilers (20,000 to 40,000kg/hr). The operating pressure
lies between 11.5 to 17.5 bar.
 The draught loss is minimum compared with other boilers.
 The defective tubes can be replaced easily.
 The entire boiler rests over an iron structure, independent of
brick work, so that the boiler may expand or contract freely.
 The brick walls which form the surroundings of the boiler are
only to enclose the furnace and the hot gases.
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13.  There is more chances of corrosion and scale formation in the
water legs due to the accumulation of sediments and the mud
particles.
 Large flat surfaces need bracing.
 It cannot carry high overloads without being damaged by
overheating.
 There are practical constructional limits for pressure and
capacity which do not meet requirements.
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14.  Mostly locomotive boiler is used to move the locomotive trains. It may also
be used as a stationary boiler. One of the example of its uses is given below:
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15.  The Kitson-Still Locomotive was an attempt to combine the fuel
economy of the diesel engine with the high starting torque of the
steam locomotive, in order to remove the need for a gearbox for
the Diesel part.
 Steam from the oil-fired boiler was used in overload conditions, for
running the locomotive auxiliaries, and for train heating.
 The actual engine was a horizontally opposed 8-cylinder design; the
4 inner cylinders (nearer the crankshaft) were steam-powered,
while the 4 outside cylinders (furthest from the crankshaft) were
Diesel.
 There were many problems ; out of which poor boiler performance
is the only one when the test began in April 1928. The loco did its
last test runs in 1933.
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16.  The working pressure of this locomotive was 200 psi, but apparently this would
drop to 135psi on starting; and it is an awfully big loss of pressure. The locomotive
would change from steam to diesel operation at an engine speed of about 30rpm.
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18. FOR YOUR ATTENTION
AND FOR PATIENTLY
LISTENING …..............
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