- Based on the energy transformation process:
- Turbine impulse
- Turbine reaction
- Under pressure steam turbine
- Back pressure
- Condensing.
- Under the pressure of steam into the turbine
- Super critical pressure (225 bar)
- Very high pressure (170 bar and above)
- High pressure (above 40 bar).
- Pressure medium (s / d 40 bar).
- Low pressure (1.2 - 2bar abs)
- Based on the steam setting in.
- Constant pressure with throttle control.
- Constant pressure with Nozzle control.
- Sliding pressure
a) The speed of the steam out nozzle Ct = 192.6 m / s, then the magnitude of thrust force P1 = m (C1t-C2) = 1/9, 81 (196.2-0) = 20kg.
b) P2 = 1/9, 81 (196.2 +196.2) = 40kg
c) P3 = 1/9, 81 (196.2 + cos300
196.2 cos300) = 34.7 kg.
Relative velocity steam strikes the blade because the blade moves C1t w1 =-U, and if U = 98.1 m / s the thrust
a) P1 '= 1/9, 81 (196.2 to 98.1) = 10kg
b) P2 '= 2/9, 81 (196.2 to 98.1) = 20kg
c) P3 '= 2/9, 81 (196.2 cos300 -
98.1 cos300) = 34.7 kg.
Cold start-bin that is if the tour has stopped more than 120 hours. To start this kind requires the longest time: 360 minutes
Warm start when the turbine stopped between 24 -72 hours. Start-up time full load: 160 minutes
Start the heat if turbine stopped less than 6 hours. Start time to 30 minutes at full load
Make sure that the temperature and vapor pressure are in accordance with the type of start before the steam is inserted into the turbine.
Slowly open the throttle valve slowly and manually note langkah2 accretion rate and rotation relative to the current state adjusted in accordance with the user expansionnya
Rapidly through the critical rotation.
Do a test protective device when rotation reaches sinkroon round.
Do a test overspeed if the unit runs out overhaul
Immediately add the flow of steam after sinkroon.
Do a manual trip if the unit runs out overhaul.
Loading the next match with the user.
internal losses are losses associated with making the steam in the turbine.
• Losses in the valve pe-
ngatur steam turbine entry ΔH
• Losses in the nozzle or
fixed blade hn
• Losses didlm blade path hb
• Losses due to increased steam
hl blade left behind
• Losses due to friction steam
with disc blade holder
• Losses in sealing an-
tar levels of blade (labirint).
• Losses caused by wet steam
external losses are losses that are not related to the course of the steam in the turbine as mechanical losses and losses in the steam turbine shaft sealing.
Lubrication of turbine generator system it functions:
Establish intermediate layer (with a certain thickness) so that no direct contact between the shaft and bearings, and dirt do not hurt the oil carried by the bearing surface.
Throw away the heat arising from friction in the bearings or the other.
Condition so that the lubricant must be guaranteed not to damage the parts in its path, because it is equipped with a turbine lubrication system cleaning system known as the "oil condtioner"
Wet steam or vapor containing water will cause erosion on turbine blades, because the grain must be removed from the grains of water vapor passes through the extraction channel and especially in the last fixed blades pengkap given channel and waster water.
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