Tampella Power Oy

Tmv Detections Oy

Pauli Harila

Keijo Imelainen

Veli-Antti Kivilinna

Ahti Klami

Seppo Tuominiemi

Paavo Hyoty

Esa Pikkujamsa

Jukka Vaistomaa

Jarmo Kaila

Matti Knuutila

Jarkko Määttä

Maiju Alaniemi

A hydro turbine of a hydroelectric power plant operates with reduced cavitation. At least one motion sensor coupled to a rotor of the hydro turbine measures motion of the rotor during operation of the hydro turbine and generates measurement data. The measurement data and one or more operational parameters of the hydro turbine employed during the measuring are acquired. The operational parameter(s) is/are indicative of power supply of the hydro turbine. Based on the measurement data and the operational parameters, at least one metric indicative of an effect of the cavitation on the hydro turbine is computed. The at least one metric is compared with at least one threshold. Based on the comparison, a determination is made that the effect of the cavitation is too high. Based on the determining, information indicating unsuitability of the one or more operational parameters is output.

Measurement arrangement for hydro turbine

A hydro turbine of a hydroelectric power plant operates with reduced cavitation at low power levels. A using at least one motion sensor coupled to a rotor of the hydro turbine, during operation of the hydro turbine is used to generate at least one metric indicative of an effect of cavitation on the hydro turbine. The metric is used by an automated governing system to change the operation of the hydro turbine to reduce cavitation.

Hydro turbine with reduced cavitation

Method for controlling chloride concentration in the flue gas of a

A method for burning secondary sludge in a recovery boiler, in which method secondary sludge is mixed with black liquor. According to the method, an alkali is added to the secondary sludge so as to obtain a mixture having a pH of over 7, whereafter the mixture of alkali and secondary sludge is heated to a temperature of over 80.degree. C. and kept at this temperature for over 30 minutes. Thereafter the heat treated mixture of alkali and secondary sludge is supplied to the thick end of a black liquor evaporation plant.

Method for burning secondary sludge in a recovery boiler

A method for adjusting the sulphur/sodium ratio in a soda recovery boiler when strong sulphurous odour gases are burned therein. According to the method, sodium is introduced into the soda recovery boiler in an amount proportional to the amount of sulphur either as sodium hydroxide, sodium carbonate compounds or soap, whereby the sodium and sulphur react, forming sodium sulphate, which can be removed from the flue gases together with fly ash.

Method for adjusting the sulphur/sodium ratio in the flue gases of a

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Kemi, Finland

Pauli Harila