BHARAT HEAVY ELECTRICALS LIMITED
General Awareness in steam Turbine Manufacturing.
PRESENTATIONONPresentation By:-ADITYA SHARMA12ME126HCST, Farah, Mathura
OVERVIEW OF BHELBHEL was established in 1964.BHEL is one of the only 7 Public Sector Undertakings (PSUs) of India clubbed under the esteemed 'Maharatna'status.On 1st February 2013, theGovernment of IndiagrantedMaharatnastatus toBHEL.BHEL has a share of 59% in Indias total installed power generating capacity.BHEL is engaged in the design, engineering, manufacture, construction, testing, commissioning and servicing of a wide range of products and services for the core sectors of the economy, viz. Power Transmission, Industry, Transportation (Railway), Renewable Energy, Oil & Gas and defence.BHEL has 15 manufacturing divisions, two repair units, four regional offices, eight service centers and 15 regional centers and currently operate at more than 150 project sites across India and abroad.
MAIN MANUFACTURING UNITSBHEL Bhopal (Madhya Pradesh )BHEL Ramachandrapuram, Hyderabad (Andhra Pradesh)Transformer Plant, BHEL Jhansi(Uttar Pradesh)High Pressure Boiler Plant and Seamless Steel Tube Plant, Tiruchirapalli(Tamil Nadu) Boiler Auxiliaries Plant, Ranipet (Tamil Nadu)ElectronicsDivision and Electro Porcelain Division, Bangalore(KarnatakaJagdishpur (Uttar Pradesh)Rudrapur (Uttrakhand)Industrial ValvesPlant, Goindwal (Punjab)BHEL Ranipur, Haridwar (Uttarakhand) Bharat Heavy Plates and Vessels Limited(Vizag)
BHEL HARIDWARIt is divided in 2 units i.e. Heavy Electrical Equipment Plant (HEEP) and Central Foundry Forge Plant (CFFP).I did my training at HEEP plant.HEEP plant is divided into 8 blocks.Steam turbines are manufactured at HEEP plant in block 3.
BHEL HEEP PLANT, HARIDWAR
HEAVY ELECTRICAL EQUIPMENT PLANT:BLOCK-1: Electrical Machine ShopBLOCK-2: Heavy Fabrication ShopBLOCK-3: Turbine Manufacturing ShopBLOCK-4: CIM (Coils & Insulation Manuf.)BLOCK-5: Condenser Fabrication & Forge ShopBLOCK-6: Fabrication Shop & Die ShopBLOCK-7: Carpentry & Heat Treatment ShopBLOCK-8: Heat Exchanger Shop
BLOCK-3: TURBINE MANUFACTURING SHOP HMS (Heavy Machine Shop)Assembly SectionTurbine SectionBlade Section
BLOCK 3 LAY-OUT Advance auto.
A turbine is a device that converts chemical energy into mechanical energy, specifically when a rotor of multiple blades or vanes is driven by the movement of a fluid or gas. In the case of a steam turbine, the pressure and flow of newly condensed steam rapidly turns the rotor. This movement is possible because the water to steam conversion results in a rapidly expanding gas. As the turbines rotor turns, the rotating shaft can work to accomplish numerous applications, often electricity generation.
IMPULSE TURBINEREACTION TURBINE
IMPULSE TURBINE :The principle of the impulse steam turbine consists of a casing containing stationary steam nozzles and a rotor with moving or rotating buckets. The steam passes through the stationary nozzles and is directed at high velocity against rotor buckets causing the rotor to rotate at high speed.The following events take place in the nozzles :1. The steam pressure decreases.2. The enthalpy of the steam decreases.3. The steam velocity increases.4. The volume of the steam increases.TYPES OF STEAM TURBINES
REACTION TURBINE :A reaction turbine has rows of fixed blades alternating with rows of moving blades. The steam expands first in the stationary or fixed blades where it gains some velocity as it drops in pressure. It then enters the moving blades where its direction of flow is changed thus producing an impulse force on the moving blades. In addition, however, the steam upon passing through the moving blades again expands and further drops in pressure giving a reaction force to the blades. This sequence is repeated as the steam passes through additional rows of fixed and moving blades.
WORKING OF STEAM TURBINE:Impulse Turbine:-steam is expanded only in nozzles.Blade passage of constant cross-section area.Reaction Turbine:-Pressure drop in fixed & moving blade.Blade passage of varying cross-section area.
TURBINES MANUFACTURED AT BHELThe various types of turbines are :-High pressure turbinesLow pressure turbinesIntermediate pressure turbines.
H.P TURBINE BLADES
Aturbine bladeis the individual component which makes up theturbine section of agas turbine. The blades are responsible for extracting energy from the high temperature, high pressure gas produced by the combustor.Size of its blades are smaller than IP & HP turbines.
LOW PRESSURE TURBINE BLADE Titanium alloys offer high strength to intermediate temperatures at a density almost half that of steel and nickel-based superalloys. As a result, they have been adopted widely in the fan and compressor stages of the gas turbine for both disc and blade applications.LP blade is larger than HP & IP.
INTERMEDIATE PRESSURE TURBINEIntermediate pressure turbine having more pressure then L.P turbine and less than the high pressure turbine(H.P) . Its blade is larger than high pressure turbine.
BLADE OF INTERMEDIATE PRESSURE TURBINEThe size of blades of I.P steam turbine is larger than H.P steam turbine , but smaller than L.P steam turbine.
GAS TURBINE:Gas turbine have been used for electricity generation.The gas turbine obtains its power by utilizing the energy of burnt gases & air which are at high Pressure and Temperature.
For electricity generation, it is known as power turbine.For propulsion unit in aircraft, it is called aircraft turbine.
CONCLUSION:-BHEL is the largest engineering and manufacturing enterprise in India .BHEL is a major contributor of equipment and systems to industries.At the all, till now BHEL is best in supply and manufacturing products.Summer Training gives the idea of general awareness in steam turbine manufacturing, & its process. Its provides practical idea to manufacturing several components of turbine.
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