Sarlin Air Audit started the energy savings campaign
The peat fired power plant of Kanteleen Voima in Haapavesi, Finland, produces electricity from the fuel of the surrounding peat bogs. The plant runs for approximately 5,000 hours annually. About 80 to 100 truckloads of peat are consumed every day. The plant produces electricity at 150 MW. Kanteleen Voima employs about 40 people, of whom at least three are always present when ”the fire is burning”.
Compressed air is an important element in power production: the power plant requires air for valve control, for various regulations and for blowing the measurement transmitters, etc. Compressed air is also needed when the boiler is cold, although the pressure level can then be lower.
“At the launch of the power plant, two oil free screw compressors were immediately introduced.”
“Drying the compressed air is of utmost importance for us, because many of our air usage points are outdoors. The air is dried down to a dew point of -40 °C. Although drying the compressed air to a good dew point is costly, it is worth our while. Another useful point is that the compressors are oil free.”
“We had our first system analysis, Sarlin Air Audit, made in 1997. On the basis of its results, we acquired a smaller compressor to even out the loads. Receiver volume was also increased.””Our compressed air system underwent another analysis in 2006. This started an energy savings campaign at the power plant, resulting in purchasing a new and more energy efficient compressor,” says the Project Manager.
“We settled on an oil free, speed-controlled unit. At the same time, we acquired a system for centralised control and monitoring: Sarlin Balance is now controlling the entire compressed-air station in a modern way, together with our DNA main automation system.”
“We continue to develop our operations, for instance by sequencing out the greatest power consumers to reduce peak consumption. Volume measurement allows this nicely now that we know what ash conveying, dust removal by sound, other instrumentation and transmitter blowing consume.”