Sensors & Transducers


Steam turbine control

November 2018 Sensors & Transducers

In coal-fired power plants, steam is produced by pumping highly purified water through boiler tubes. The water is heated to a high temperature and pressure, and then flows through several orifices into the steam turbine. Once past the orifice, the water pressure drops and it immediately flashes into superheated steam, which is directed toward the turbine blades at high velocity. Due to the high velocity of the superheated steam, the turbine blades start to rotate and turn the turbine shaft, which is connected to the generator through reduction gears, and thereby ultimately generates electricity.

Valve position, pressure and temperature measurements are all necessary to ensure stability in this process. A solution for this application is a setup with a potentiometer for valve position measurement, a 2-wire style pressure transmitter and a 4-wire RTD for precise temperature measurements. All three signals are connected to individual PR Electronics PR 4114 universal transmitters, which output 0-10 VDC signals to the PLC.

The 4501 display/programming front allows local readout of both input and output signal and the process calibration function in the advanced menu provides easy and precise calibration of the open and closed valve positions.



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Sensor for efficient pneumatic performance
October 2020, SICK Automation Southern Africa , Sensors & Transducers
SICK Automation’s FTMg flow sensor detects pneumatic system leakages well before pressure loss causes machine failure. It is engineered to output up to eight process parameters.

Read more...
Conductivity sensor for interface detection
October 2020, ifm - South Africa , Sensors & Transducers
The LDL 100 conductivity sensor from ifm electroninc makes reliable differentiation between cleaning media possible in CIP applications.

Read more...
Inductive sensors for Industry 4.0
October 2020, Turck Banner , Sensors & Transducers
Inductive measurement sensors with IO-Link and a voltage output complete Turck’s sensor portfolio for a variety of different application requirements.

Read more...
MicroHAWK smart cameras simplify code reading and inspection
October 2020, Omron Electronics , Sensors & Transducers
Omron’s powerful new smart cameras simplify applications by combining code reading and vision inspection into a single, highly compact device.

Read more...
3D collision warning system
October 2020, ifm - South Africa , Sensors & Transducers
The 3D collision warning system is based on established 3D sensors from ifm electronic. It precisely detects obstacles and visualises them on a monitor.

Read more...
Check valve with redundant sealing
September 2020, WIKA Instruments , Valves, Actuators & Pump Control
The new model CV check valve from WIKA is designed for a wide range of applications in the process industry. Its sealing system reliably prevents backflow of liquid and gaseous media.

Read more...
Prevent backward driving accidents
September 2020, SICK Automation Southern Africa , Sensors & Transducers
To prevent collisions and improve worker safety, Cologne-based sugar producer Pfeifer & Langen selected SICK Automation’s Visionary-B CV 3D driver assistance system for use at its reloading point.

Read more...
Conductivity sensor for CIP monitoring
September 2020, ifm - South Africa , Sensors & Transducers
The LDL200 from ifm electronic is designed to be used in cleaning processes (CIP) in the food industry.

Read more...
Conductivity sensor for interface detection
September 2020, ifm - South Africa , Sensors & Transducers
The conductivity sensor LDL100 for interface detection from ifm electronic ensures that product validation is possible at all times.

Read more...
Clip-on indicator with Bluetooth and logging
September 2020, WIKA Instruments , Data Acquisition & Telemetry
Monitor live process values and diagnostic information on any iOS/Android device running the free PPS application, or monitor directly on the display.

Read more...