Saturday, 27 June 2020

Full Forms of Bank Names



Full Form
Indian Banks
Reserve Bank of India
National Bank for Agriculture and Rural Development
State Bank of India
DCBDevelopment Credit Bank
ING Vysya Bank
Punjab & Sind Bank
Shamrao Vitthal Co-operative Bank
Industrial Development Bank of India
Housing Development and Finance Corporation
Industrial Credit and Investment Corporation of India Limited
Punjab National Bank
Bank of India
United Bank of India
Bharatiya Mahila Bank
Union Bank of India
Bank of Baroda
Bank of Maharashtra
Indian Overseas Bank
United Commercial Bank
Central Bank of India
Oriental Bank of Commerce
Bank of Rajasthan
City Union Bank
Catholic Syrian Bank
Karur Vysya Bank
Lakshmi Vilas Bank
South Indian Bank
Tamilnad Mercantile Bank
Export-Import Bank
Industrial Investment Bank of India
Small Industries Development Bank of India
National Housing Bank
Telangana State Cooperative Apex Bank Ltd
TGBTelangana Grameena Bank
APGUBAndhra Pradesh Grameena Vikas Bank
Foreign Banks
Bank of America
American Express
Hong Kong and Shanghai Banking Corporation
The Development Bank of Singapore
Asian Development Bank
Royal Bank of Scotland
Bank of Ceylon
Abu Dhabi Commercial Bank
Bank of Bahrain and Kuwait
Deutsche Bank
Standard Chartered Bank
Royal Bank of Scotland

On the call of Prime Minister, Culture Ministry to celebrate “Sankalp Parva” to plant trees from 28th June to 12 July 2020

On the call of Prime Minister, Culture Ministry to  celebrate “Sankalp Parva” to plant trees from 28th June to 12 July 2020

Culture Minister urges all to participate in the Sankalp parv and plant trees to create healthy environment in our country

Posted On: 27 JUN 2020 4:38PM by PIB Delhi
Prime Minister of India Shri Narendra Modi has called for planting at least five trees either in Officecampus or wherever it is possible, to ensure clean and healthy environment of the country. Union Minister of State for Culture and Tourism (Independent charge)Shri Prahlad Singh Pateltoday called for successful organizing of “Sankalp Parva” and plant trees as desired by our Prime Minister.

Shri Patel informed that the Ministry of Culture has decided to celebrate Sankalp Parva from 28th June to 12 July 2020, wherein Ministry expects all its Subordinate Offices, Academies, Attached Institutions, Affiliated Institutions to plant trees in its campus or at the surroundings wherever it is possible. He added that the Ministry of Culture recommends to plants five trees which have been identified by our Prime Minister and which represent the herbal heritage of our country. These trees are (i) “Bargad” (ii) “Awla” (iii) “Pepal” (iv) “Ashok” (v) “Bel”. He further said that if sapling of these trees are not available then people may do plantation of any other sapling of their choice.

Shri Patel also said that the organizations must ensure that each employee should plant at least one tree of his/her choice and over and above these five trees which should be planted as per the call of thePrime Minister.The Institutions must also ensure that the employee takes care of plant planted by them during the year so that it survives and flourishes .

Shri Patel hasurged all to participate in the Sankalp Parv and share the photo of plantation with #?????????? #SankalpParv with Ministry of Culture. He said that  monsoon season has started , which is right time for plantation. We have seen the importance of clean and healthy environment during this Pandemic and we are proud of our Herbal Wealth which hasenough strength to enable us to sail through safely in the period of Pandemic. I urge everybody to participate in this Sankalp Parv and plant and take care of at least one plant, so we can create healthy environment and a flourishing “Bharat”.

Thursday, 25 June 2020

Gas Turbine Combustion Section

Gas Turbine Combustion Section

The combustion system is of the reverse-flow type with 14 combustion chambers arranged around the periphery of the compressor discharge casing. This system also includes fuel nozzles spark plug ignition system, flame detectors, and crossfire tubes. Hot gases, generated from burning fuel in the combustion chambers, are used to drive the turbine. High pressure air from the compressor discharge is directed around the transition pieces and

into the combustion chambers liners. This air enters the combustion zone through metering holes for proper fuel combustion and through slots to cool the combustion liner. Fuel is supplied to each combustion chamber through a nozzle designed to disperse and mix the fuel with the proper amount of combustion air.

Orientation of the combustion chambers around the periphery of the compressor is shown on figure next page. Combustion chambers are numbered counter-clockwise when viewed looking down-stream and starting from the top of the machine. Spark plugs and flame detectors locations are also shown.
Combustion Chamber and Crossfire Tubes

 Combustion wrapper
The combustion wrapper forms a plenum in which the compressor discharge air flow is directed to the combustion chambers. Its secondary purpose is to act as a support for the combustion chamber assemblies. In turn, the wrapper is supported by the compressor discharge casing and the turbine shell.

Combustion chambers
Discharge air from the axial flow compressor flows into each combustion flow sleeve from the combustion wrapper (see figure). The air flows up-stream along the outside of the combustion liner toward the liner cap. This air enters the combustion chamber reaction zone through the fuel nozzle swirl tip, through metering holes in both the cap and liner and through combustion holes in the forward half of the liner.

The hot combustion gases from the reaction zone pass through a thermal soaking zone and then into a dilution zone where additional air is mixed with the combustion gases. Metering holes in the dilution zone allow the correct amount of air to enter and cool the gases to the desired temperature. Along the length of the combustion liner and in the liner cap are openings whose function is to provide a film of air for cooling the walls of the liner and cap as shown in figure. Transition pieces direct the hot gases from the liners to the turbine nozzles. All fourteen combustion liners, flow sleeves and transition pieces are identical.

Crossfire tubes
All fourteen combustion chambers are interconnected by means of crossfire tubes. These tubes enable flame from the fired chambers to propagate to the unfired chambers.

1 comment:

  1. please uplod the clear pic with same as reality thank u so much

Gas Turbine Lubrication System

Gas Turbine Lubrication System

NOTE: Lubricating oil recommendations are included in the "Gas turbine subcontractor’s Literature chapter".

The lubricating requirements for the gas turbine power plant are furnished by a common forced-feed lubrication system. This lubrication system, complete with tank, pumps, coolers, filters, valves and various control and protection devices, furnishes normal lubrication and absorption of heat rejection load of the gas turbine. Lubricating fluid is circulated to the three main turbine bearings, generator bearings, and to the turbine accessory gear and fuel pump. Also, lubricating fluid is supplied to the starting means torque converter for use as hydraulic fluid as well as for lubrication. Additionally, a portion of the pressurized fluid is diverted and filtered again for use by hydraulic control devices as control fluid.

Major system components include:
  • Lube reservoir in the accessory base;
  • Main lube pump (shaft driven from the accessory gear);
  • Auxiliary lube pump and emergency lube pump;
  • Pressure relief valve VR-1 in the main pump discharge;
  • Lube fluid heat exchanger;
  • Lube filters;
  • Bearing header pressure regulator VPR-2-1.
Lube fluid temperatures are indicated on the thermocouples which may be located in the bearing header, bearing drains, and the oil tank. For turbine starting, a maximum of 800 SSU is specified for reliable operation of the control system and for bearing lubrication. A thermocouple, LT_OT-1A, prevents turbine start-up if the temperature of the lubricant is lower than the switch setting (only if applicable).

Lubricating fluid for the main, auxiliary and emergency pumps is supplied from the reservoir, While lubricating fluid used for control is supplied from the bearing header. This lubricant must be regulated to the proper, predetermined pressure to meet the requirements of the main bearings and the accessory lube system, as well as the hydraulic control and trip circuits.

Regulating devices are shown on the Lube System Schematic Diagram Figure LS-1. All lubricating fluid is filtered and cooled before being piped to the bearing header.

The reservoir for the lubrication system is the 3300 gallon (i.e. 12 491 l) tank which is fabricated as an integral part of the accessory base. Lubricating fluid is pumped from the reservoir by the main shaft driven pump (part of the accessory gear) or auxiliary or emergency Pumps at a pressure of 25 psig (i.e. 1.75 bar) to the bearing header, the accessory gear and The hydraulic supply system. After lubricating the bearings the lubricant flows back through various drain lines to the lube reservoir.

All lubricant pumped from the lube reservoir to the bearing header flows through the lube fluid heat exchanger(s) to remove excess heat and then through the cartridge type filters providing five micron filtration. The dual heat exchangers are connected in parallel.

Filtration of all lube oil is accomplished by a 5 micron, pleated paper filter installed in the lube system just after the lube oil heat exchanger. Two filters are used with a transfer valve installed between the filters to direct oil flow through either filter and into the lube oil header.

 Lubricating Oil Pumps 

Lubrication to the bearing header is supplied by three lube pumps:

1-The main lube supply pump is a positive displacement type pump mounted in and driven by the accessory gear.

2 -The auxiliary lube supply pump is a submerged centrifugal pump driven by an A.C. motor.

3 -The emergency lube supply pump is a submerged centrifugal pump driven by a D.C. motor.

Main Lube Pump
The main lube pump is built into the inboard wall of the lower half casing of the accessory gear. It is driven by a splined quill shaft from the lower drive gear. The output pressure to the lubrication system is limited by a back-pressure valve to maintain system pressure.
Auxiliary Lube Pump
The auxiliary lube pump is a submerged centrifugal type pump driven by an A.C. motor. It provides lubricant pressure during start-up and shut-down of the gas turbine when the main pump cannot supply sufficient pressure for safe operation. Operation of this pump is as follows:

The auxiliary lube pump is controlled by a low lube oil pressure alarm switch (63 QA-2). This low pressure level alarm causes the auxiliary pump to run under low lube oil pressure conditions as is the case during start-up or shut down of the gas turbine when the main pump, driven by the accessory drive device, does not supply sufficient pressure. At turbine start-up, the A.C. pump starts automatically when the master control switch on the turbine control panel is turned to the START position.

The auxiliary pump continues to operate until the turbine reaches approximately 95 per cent of operational speed.

At this point, the auxiliary (cooldown) lube pump shuts down and system pressure is supplied by the shaft-driven, main lube pump.

During the turbine starting sequence, the pump starts when the start signal is given. The control circuit is through the pressure level of pressure switch 63 QA-2. The pump will run until the turbine operating speed is reached (operating speed relay 14 HS picks up), even though the lube oil header is at rated pressure and the discharge pressure level (63 QA-2) is above alarm level setting.

When the turbine is on the shut-down sequence, this pressure transmitter will signal for the auxiliary pump to start running when the lube oil header pressure falls to the point at which pressure level alarm setting is reached.
Emergency Lube Pump
The emergency lube pump is a D.C., motor-driven pump, of the submerged centrifugal type. This pump supplies lube oil to the main bearing header during an emergency shutdown In the event the auxiliary pump has been forced out of service because of loss of A.C. power, or for other reasons. It operates as follows:

This pump is started automatically by the action of pressure transmitter 96 QA-2 whenever the lube pressure in the main bearing header falls below the pressure switch set ting.

Should the auxiliary pump fail during the shut-down sequence, because of an A.C. power failure or any other cause, the emergency lube pump will be started automatically by the action of low lube oil pressure transmitter 96 QA-2 and continue to run until the turbine shaft comes to rest.


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