The dangers of excess moisture
A
Michell Instruments product story
Edited by the Engineeringtalk editorial team
May 22, 2002
Application engineers at Michell Instruments have identified the main areas where excess moisture can cause danger to the environment, equipment and even to human life.
We all know from an early age that water conducts electricity.
Therefore it is obvious that surplus humidity in air and gases can be catastrophic in an electricity generation plant.
Application engineers at Michell Instruments have identified the main areas where excess moisture can cause danger to the environment, equipment and even to human life.
Noxious gases emitted by gas-fired power stations can be reduced by controlling the humidity of air mixed with the fuel gas.
Energy consumption can be reduced by allowing dew point control of compressed air dryer changeover.
Sulphur hexafluoride (SF6), which is frequently used as an insulating gas within high-voltage switchgear, must be sufficiently dry to prevent arcing, which results in contact erosion and reactions producing corrosive hydrofluoric acid.
In CCGT power plants damage and downtime caused by flame back-up through condensate formation inside the burner nozzles can be avoided by accurate measurement of hydrocarbon dew point in fuel gas.
In nuclear power plants it is essential that CO2 and steam loops are not counter-contaminated.
This can be assured by verifying the integrity of heat exchangers.
Pipe fracture caused by freezing can be prevented by the proper control of compressed air dryers.
An explosion in a power plant is almost unimaginable.
However, a few years ago, that's exactly what happened at a well known power station in the UK, and it was because of excess humidity.
If H2 gas is not maintained at below 0C dew point in a generator set this can cause the formation of condensation on exposed live metal parts, which may then lead to an explosion.
Michell Instruments provides a range of advanced industrial hygrometry products that can help to protect the environment, plant equipment and people by monitoring and controlling humidity in air and gases.
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Contact Michell Instruments
Tel +44 1353 658000
Other Michell Instruments stories
-
Hydrocarbon dew-point analysers take control
Michell Instruments has supplied an energy company with hydrocarbon dew-point analysers in order to develop a control solution for the company's natural gas storage site in the UK. -
Michell transmitter simplifies oxygen measurement
Michell has introduced the XTP600 self-contained oxygen transmitter, which is claimed to make oxygen measurement in the process industry as simple as a field-pressure or temperature measurement. -
Michell introduces intrinsically safe transmitter
Michell Instruments has added the Easidew Pro IS to its range of Easidew dew-point transmitters. -
Michell sensor speeds up maintenance of RH devices
Michell Instruments has introduced the I7000 Hygrosmart humidity sensor, which is claimed to make the maintenance of the company's relative-humidity (RH) instruments quick and simple with no downtime. -
Michell oxygen transmitter eliminates drift
Michell is offering thermo-paramagnetic technology that eliminates transmitter drift and deterioration by preventing hydrogen molecules from diffusing into the sensor.
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