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In large turbines, a valve controls steam flow to groups of nozzles. The number of open valves controls the number of nozzles in use according to the load. A bar-lift or cam arrangement operated by the governor opens and closes these valves in sequence. Such a device is a multi-port valve. Using nozzles at full steam pressure is more efficient than throttling the steam.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agofunction of governor in steam turbine is to maintain the constant speed of turbine shaft by controlling the steam discharge through the turbine
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How working the governor during steam turbine operate?
governor senses the speed of spindle of engine and controls the mechanism of opening and closing of throttle valve
What causes steam turbine governor hunting?
inconsistent load will cause steam turbine hunting.
Nozzle clearance how to steam turbine?
Steam turbine nozzle clearance is the total energy content available in steam. This is through a valve.
What is actuator in turbine?
Which actually Actuates the Steam Control Valve
What is main steam stop valve?
Used in power generation. When steam turbine is on-line the Main Steam Stop Valve is fully open. When offline it is closed. Steam to turbine is controlled thru control valves after Main Steam Stop Valve
How working the governor during steam turbine operate?
governor senses the speed of spindle of engine and controls the mechanism of opening and closing of throttle valve
What causes steam turbine governor hunting?
inconsistent load will cause steam turbine hunting.
Nozzle clearance how to steam turbine?
Steam turbine nozzle clearance is the total energy content available in steam. This is through a valve.
What is actuator in turbine?
Which actually Actuates the Steam Control Valve
What is main steam stop valve?
Used in power generation. When steam turbine is on-line the Main Steam Stop Valve is fully open. When offline it is closed. Steam to turbine is controlled thru control valves after Main Steam Stop Valve
How ESV in turbine works?
The Emergency Stop Valve (ESV) in a turbine is placed between the steam engine and the turbine structure. It is designed to rapidly close and prevent steam from reaching the turbine in case of emergency.
What is vaccume breaker in steam turbine?
A vacuum breaker is a check valve installed on the exhaust casing of a turbine. It opens to prevent the collapse of the exhaust hood when the turbine cools and the condensing steam produces a vacuum.
What is steam turbine overspeed tester?
Over speed test will be executed to ensure that the pump will tripped due to over speed. There is an electronic tripped set point by governor valve closing when the actual speed reach to maximum governor speed as well as Mechanical trip which will occur when the speed reach to electronic tripped and the valve not close due to malfunction of governor valve. Mechanical latch lever will slid to cut the HP steam. Electronic maximum governor speed will be less than mechanical speed set point.
What is the effect of steam turbine control valve throttling in turbine efficiency?
In Boiler follow turbine mode , Boiler produces a constant pressure behind throttling valve and throttling valve adjusts necessary pressure and required steam as High Pressure steam for entering the turbine . In Valves Wide Open (VWO) mode the efficiency is maximum and we haven't any loss. (It's nearly 106% Turbine MCR) . In Turbine MCR , we have a little loss and consequently a little bit worse heat rate . In partial load , loss is more and efficiency worse.
What is throttle pressure regulator of a steam turbine?
Essentially its the pressure prior to entering the turbine chamber via the MSV (main stop valve)
Governor used in power generating stations?
Steam turbines run with a speed governor which responds to changes in turbine rotational speed and operates on the steam admission valves. Thus if the network that the turbine generator feeds has a change in frequency, the turbine responds. If extra load comes onto the network, the frequency drops slightly, the generator slows and the turbine must follow (they are solidly locked together) so that the governor then opens the steam valves to try to keep the speed steady. The converse happens if the network suddenly loses load.
How do you overspeed steam turbine?
Run the turbine up to about 75% speed and trip it manually. Reset the trip linkage. Restart the turbine. Adjust the governor up until the overspeed trip mechanism trips the stop valve. Watch the tachometer, the overspeed trip should activate within 10% over the maximum allowable speed of the turbine, if it doesn't trip it manually and repair the trip.
