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DIFFERENCE BETWEEN S.I AND C.I ENGINES

Criteria S.I. Engine (Petrol or Spark Ignition Engine) C.I. Engine (Diesel or Compression Ignition Engine) Working Cycle Works on Otto Cycle or Constant Volume Cycle. Works on Diesel Cycle. Mixture During Suction Stroke Takes a mixture of air and petrol during the suction stroke. Takes only air during the suction stroke. Fuel Used Uses petrol as fuel. Uses diesel as fuel. Compression Ratio Has a compression ratio that varies from 6 to 10. Has a compression ratio that varies from 16 to 20. Engine Weight and Cost S.I. engines are lighter and cheaper. C.I. engines are heavier and costlier. Initial Cost Initial cost is lower compared to C.I. engines. Initial cost is high due to high compression ratio. Starting Starting is easy. Starting is difficult, especially in cold conditions. ...
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FIRE AND WATER TUBE BOILER

Water Tube Boiler Fire Tube Boiler The rate of steam generation is high, up to 450 tonnes/hr The rate of steam generation is low, up to 9 tonnes/hr It generates steam at high pressure up to 165 bar It generates steam at low pressure, up to 24.5 bar Its overall efficiency is 90% Its overall efficiency is 70% Less water is required for steam generation More water is required for steam generation It is suitable for load fluctuations It is not suitable for load fluctuations Water flows in tubes which are surrounded by fire Fire flows in tubes which are surrounded by water Operating cost is high Operating cost is low Wall thickness is less Wall thickness is more Cost of installation is high Cost of installatio...
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LANCASHIRE BOILER

LANCASHIRE BOILER -   It is non portable fire tube type horizontal boiler. It consists of cylinder shells with two tubes A and B called Fire Tubes which are symmetrical in dimension. Each Fire Tubes Contain a furnace in front of it, there is a Grate over which fuel is burn. CONSTRUCTION - it is a stationary fire tube internally fired horizontal boiler. These boiler have a cylinder shell of 2m in diameter and it's length varies from 7.5m to 10m . It has two large internal fire tubes having diameter 80cm to 100 cm in which grate is situated. WORKING - The fuel is burn in a fire great and on burning the fuel combustion Process take place The fuel gas enter the main tube by the fire deflector. As the flue gas moves in tubes they heat up the tubes and water which is surrounded the tubes is also heated. After this process water is converted into steam. The steam is taken out from steam supply valve. Application - it is used in sugar mills and chemical industry. ADVANTAGES •  It...
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NESTLER BOILER

NESTLER BOILER:- It is a fire tube boiler Producing steam at a pressure of 12 bar and a temp of about 240° C. The rate of steam generation for this boiler is 550kg/hr. CONSTRUCTION:- IT consists of following components • Boiler sheel • Fire tubes • Centrifugal pump  • stroke box  • Burner • Flue pump The boiler consists of 12mm thick mild steel plat end is welded with one at each end.A large number of fire tubes of 50 mm diameter each are fitted the two end plate in addition to 0.5 m diameter furnace tube which extends from front end plate to real end plate. WORKING:- the burner is provided at the mid of the frunece. At each end of boiler shell, there is a smoke box. In the rear end of smoke box, a deflector arch is provided to divert the flow of flue gas . The Heat is generated by flue gas with high pressure air in burner. The heated air is supplied in fire tubes which is inside the water. This heat ,  heated the tubes and water. After this process water is c...
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BABCOCK AND WILCOX BOILER

BABCOCK AND WILCOX BOILER:- This is very popular boiler. It is water tube boiler and it is designed for stationary purposes.  CONSTRUCTION:-  It consist of following components 1.) Boiler Drum - It is cylindrical drum made up of steel plates in which water is collected and at upper portion is steam space in which steam is collected. 2.) Water Tubes - A large Number of Tubes are attached both the headers water come down to down take headers and moves up to uptake headers. These tubes are inclined at angles of 5 to 15 degree. 3.) Furnace - It is provided just below the upper header. Coal is placed on the Grate to produce heat.  This heat is placed surrounded by the water Tubes. 4.) Baffles - It is act as deflector of the gases and are placed with water Tubes. 5.) Super heater - It is also provided the path of the flue gas to heat the wet steam. To convert it into dry steam. WORKING:-     First step water is filled in BOILER DRUM . Their is two...
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DIFFERENCE BETWEEN S.I AND C.I ENGINES

Criteria S.I. Engine (Petrol or Spark Ignition Engine) C.I. Engine (Diesel or Compression Ignition Engine) Working Cycle Works on Otto Cycle or Constant Volume Cycle. Works on Diesel Cycle. Mixture During Suction Stroke Takes a mixture of air and petrol during the suction stroke. Takes only air during the suction stroke. Fuel Used Uses petrol as fuel. Uses diesel as fuel. Compression Ratio Has a compression ratio that varies from 6 to 10. Has a compression ratio that varies from 16 to 20. Engine Weight and Cost S.I. engines are lighter and cheaper. C.I. engines are heavier and costlier. Initial Cost Initial cost is lower compared to C.I. engines. Initial cost is high due to high compression ratio. Starting Starting is easy. Starting is difficult, especially in cold conditions. ...
Read more

LANCASHIRE BOILER

LANCASHIRE BOILER -   It is non portable fire tube type horizontal boiler. It consists of cylinder shells with two tubes A and B called Fire Tubes which are symmetrical in dimension. Each Fire Tubes Contain a furnace in front of it, there is a Grate over which fuel is burn. CONSTRUCTION - it is a stationary fire tube internally fired horizontal boiler. These boiler have a cylinder shell of 2m in diameter and it's length varies from 7.5m to 10m . It has two large internal fire tubes having diameter 80cm to 100 cm in which grate is situated. WORKING - The fuel is burn in a fire great and on burning the fuel combustion Process take place The fuel gas enter the main tube by the fire deflector. As the flue gas moves in tubes they heat up the tubes and water which is surrounded the tubes is also heated. After this process water is converted into steam. The steam is taken out from steam supply valve. Application - it is used in sugar mills and chemical industry. ADVANTAGES •  It...
Read more

FIRE AND WATER TUBE BOILER

Water Tube Boiler Fire Tube Boiler The rate of steam generation is high, up to 450 tonnes/hr The rate of steam generation is low, up to 9 tonnes/hr It generates steam at high pressure up to 165 bar It generates steam at low pressure, up to 24.5 bar Its overall efficiency is 90% Its overall efficiency is 70% Less water is required for steam generation More water is required for steam generation It is suitable for load fluctuations It is not suitable for load fluctuations Water flows in tubes which are surrounded by fire Fire flows in tubes which are surrounded by water Operating cost is high Operating cost is low Wall thickness is less Wall thickness is more Cost of installation is high Cost of installatio...
Read more