Bpp Section 13

Front 1

1884 / Charles Parsons

Back 1

Steam turbine invented in what year? Who's the inventor?

Front 2

Hp, Ip and Lp turbines

Back 2

3 classification of steam turbines by the steam pressure that operates them.

Front 3

Steam pressure, Arrangement, Steam flow and Reheat/Non reheat

Back 3

4 Turbine Classification

Front 4

Tandem and Cross Compound

Back 4

2 types of turbine arrangement

Front 5

Tandem compound

Back 5

It is the name used when all of the turbines are joined end to end to each other on one shaft.

Front 6

Cross Compound

Back 6

It is the name given when all of the turbines are not joined on the same shaft.

Front 7

Single, Double and Triple flow turbines

Back 7

Turbines are also classified by their steam flow, what are they?

Front 8

Reheat turbine

Back 8

If they send steam back to the boiler for reheating after it has been partially used and then readmit it to the turbine, it is called _____.

Front 9

Double Reheat

Back 9

When reheat happens twice it is called ____.

Front 10

Main steam header

Back 10

It contains and guides the flow of the superheated, high pressure steam from the boiler to the turbine.

Front 11

Basket Strainer

Back 11

It prevents any large solid materials from reaching and damaging the turbine internals.

Front 12

Main stop valve

Back 12

Its function is to admit steam to the turbine for normal operation or shut off the flow of steam quickly if emergency conditions require it.

Front 13

Steam Chest

Back 13

It is a manifold that contains the control valves.

Front 14

Control valves or Governing valves

Back 14

These valves are located in the steam chest and control the flow of steam to the high pressure turbine.

Front 15

Inlet Bends

Back 15

It connects the steam chest with nozzle block in the HP turbine.

Front 16

Nozzle Block

Back 16

It is the first row of the stationary nozzles

Front 17

Full Arc Steam Admission

Back 17

It is a procedure in most modern turbines that is being used to start up turbines from cold or relatively cool conditions.

Front 18

Nozzle

Back 18

Another term for stationary blades.

Front 19

Buckets

Back 19

Another term for rotating blades.

Front 20

Cold Reheat System

Back 20

The exhaust from the H.P turbine is piped back to the boiler to become reheated.

Front 21

Hot Reheat System

Back 21

The steam returning from the boiler goes to I.P turbine is called _____.

Front 22

Reheat Stop Valve and Intercept Valve

Back 22

They are placed in series in the hot reheat steam line to the I.P turbine to protect it from dangerous overspeeds in an emergency.

Front 23

Reheat Stop Valve

Back 23

It is the Main stop valve counter part valve.

Front 24

Intercept Valve

Back 24

It is the counter part of Control or Governing Valve.

Front 25

Intercept Valve

Back 25

Valve that is placed close to the I.P turbine in the hot reheat steam line. It is usually a steam strainer in the reheat steam line to stop foreign material from entering the I.P.

Front 26

Crossover

Back 26

It is the pipe of duct that contains and guides the steam from I.P turbine to the L.P turbine. It is the largest pipe on the entire turbine.

Front 27

Impulse and Reaction Turbines

Back 27

Two fundamental types of steam turbines

Front 28

Impulse type turbine

Back 28

It may be compared to a child's pinwheel. The energy to rotate this turbine comes from the velocity of energy of a steam jet.

Front 29

Curtis Stage

Back 29

Another term for Velocity Compounded Impulse Stage

Front 30

Curtis Stage

Back 30

It is used in turbines to make use of the very high velocity steam that comes from the first stage nozzle.

Front 31

Velocity Compounded Impulse Stage

Back 31

It is the most common first stage used in turbines today.

Front 32

Reaction Type Turbine

Back 32

It may be compared to the force from the kick of a shotgun, or force that moves a toy balloon when it is inflated, left open and released.

Front 33

Sealing

Back 33

Its main purpose is to stop steam leakage past the blading or diaphragms to get top efficiency from the unity.

Front 34

Reaction Blade Rows

Back 34

It uses seals at the blade tips to avoid the leakage of steam over the blade tips.

Front 35

Impulse Blade rows

Back 35

They are sealed between the diaphragm and the rotor to avoid leakage past this point.

Front 36

H.P TURBINE CASINGS

Back 36

They are made of high grade alloy steel to withstand the initial high pressure and temperatures of the steam.

Front 37

I.P Turbine Casings

Back 37

It is usually made of the same quality steel as the HP turbine. But it has thinner wall sections on the casings.

Front 38

L.P Turbine Casings

Back 38

They are made of fabricated low carbon steel plates.

Front 39

Turning Gear

Back 39

It is a motor driven combination of gears that engages and turns the turbine shafts at very slow speeds.

Front 40

Breakable Diaphragm

Back 40

Another name for Atmospheric Relief.

Front 41

Atmospheric Relief/ Breakable Diaphragm

Back 41

It is a safety device that protects the exhaust hood and condenser from excessive steam pressure. It consists of a thin lead or copper Diaphragm across an opening in the exhaust hood.

Front 42

Shaft Seals or Glands

Back 42

They are required on turbines to prevent steam leakage out of the turbine and air leakage into the turbine.

Front 43

Carbon, Water, and Steam Labyrinth

Back 43

Three common types of shafts seals

Front 44

Carbon Seals

Back 44

Seals that are used on only the very small turbines.

Front 45

Steam Labyrinth Seals

Back 45

Seals that are used on large turbines today.

Front 46

Tribology

Back 46

Study of friction

Front 47

Lube Oil

Back 47

It is supplied to bearings to allow the turbine shaft to rotate without touching the bearings.

Front 48

Control Oil

Back 48

It is the same oil used to lubricate the bearings except it is at a higher pressure.

Front 49

Main Oil Tank

Back 49

It is located below and away from the heat of the turbine to reduce the fire hazard.

Front 50

Main Shaft Pump

Back 50

It is usually a centrifugal pump mounted directly on the turbine shaft in the front standards.

Front 51

Auxiliary Oil Pump

Back 51

This pump provides oil to the system during Start ups and shutdowns when the main shaft pump is not up to speed.

Front 52

Oil Driven Booster Pump

Back 52

It is located in the oil tank to supply the main shaft pump with oil.

Front 53

Ejector

Back 53

Another type of primer for the main shaft pump. It makes use of a small quantity of high pressure oil from the oil tank to the suction of the main shaft pump.

Front 54

Hydrogen Seal Oil Pump

Back 54

Seals that are maintained by oil at reduced pressures from the main oil system.

Front 55

Turning Gear Oil Pump

Back 55

This is the small pump that can supply oil to the bearings and turning gear while the unit is on turning gear.

Front 56

Oil Coolers

Back 56

Reduces the oil temperature before it goes to the bearings.

Front 57

Welded Steel Pipes

Back 57

Pipe that is used extensively to make up the oil system.

Front 58

Vapor Extractor

Back 58

Another name for Oil tank exhauster

Front 59

Vapor Extractor

Back 59

It is a motor driven fat that removes oil vapors and hydrogen vapors on hydrogen cooled units from the main oil tank and exhausts them to the atmosphere in a fire safe area.