Power Plant Oil Liquid Level Sensor


chemical-feed

chemical-feed

In 2015, global electricity production will reach 25,000 TWh (terawatt hours). Fossil fuels are the dominant component in the global energy mix with most being transformed into electricity through combustion and heat exchange. This heat exchange converts water into steam that creates mechanical energy by spinning a turbine. The turbine creates a magnetic field that is then converted into electricity through alternating current. Due to the high heat generated within turbines, they must be steadily cooled to ensure that the turbine spins efficiently and does become damaged. The most effective coolant for this purpose is hydrogen gas, with its low viscosity and high heat ratio. However, the low density of hydrogen allows it to easily pass through seals and escape into the atmosphere. As such, it’s imperative that the generator seals be continuously lubricated. At this power plant, an EchoSafe ultrasonic level transmitter measures the seal oil surrounding a hydrogen-cooled turbo generator. Moisture enters the seal oil system when oxygen combines with hydrogen, and ultimately this raises the oil level within the reservoir. When the oil level raises above its limit, the SCADA turns on a vacuum pump to extract some oil and maintain the level within its operational range.