Hedemora Energi AN

Biomass utilisation, Sweden

About the customer:

Hedemora Energi AN provides solutions in the area of waste management, the water and effluent industry and district heating. Hedemora Energi operates throughout the whole of Sweden. 

Throughout the project M+M did their cooperation with good spirits. In summary, the two turbine-plants M+M delivered to us 2010 has both been very good and with stable production.

Anders Engdahl, Production Manager and Vice President, Hedemora Energi AN

End customer Stadtwerke Hedemora Energi AN
Branch Biomass utilisation
Location Hedemora, Sweden
Type KT-500-8 A4E7
Year of manufacture 2011
Rated power 1691 kW
Speed 8948 rpm
Inlet pressure 40.0 bar abs.
Exhaust pressure 0.39 bar abs.
Inlet temperature 320 °C
Exhaust pressure 0.75 bar abs.

End customer Stadtwerke Hedemora Energi AN
Branch Biomass utilisation
Location Hedemora, Sweden
Type KT-520-8 A4E7
Year of manufactur 2011
Rated power 2492 kW
Speed 8946 rpm
Inlet pressure 40.0 bar abs.
Exhaust Pressure 1.45 bar abs.
Inlet temperature 400 °C

Our objectives:

The contract was a public call for tenders for two turbine plants which differed only marginally in terms of power (turbine and district heating). 

With our optionally offered concept of a turbine with two-stage heat condensation, by which a regulated steam extraction optimally distributes the steam to the two heat condensation chambers even under partial load, we were able to win both tenders by virtue of the better economy. After the delivery of a first turbine to Scandinavia for Norway in the previous year, this was our second of many subsequent projects that we have realised in collaboration with the company Weckmann, our marketing partner in Scandinavia.  

The two turbines were installed at different locations whereby the somewhat larger is used to supply the metropolitan area of Hedemora, while the smaller plant supplies the surrounding community.

The technical implementation:

Besides the turbine-generator sets our scope of supply also covered in each case the heat condensation plant, the converter station, connecting pipelines, the medium voltage system and the complete installation and commissioning of the so-called "turbine island". 

The two-stage heat condenser is executed in an innovative two-chamber construction design by M+M itself. The installation concept is thus compact and space-saving.

The project flow:

With the support of the company Weckmann, our Swedish marketing partner, a professional and successful cooperation with our customer was achieved. Both plants were installed within the planned period and commissioned.  

For the first time we packaged the auxiliary systems such as evacuation for the condensation plant, condensate pump etc. ourselves and not procured these as a package from the manufacturer. 

Thus we were able to deepen our know-how and adapt the plant further to the individual customer requirements.

The delivery of 2 p.c. steam turbines to Hedemora was our (Weckman AB) first project with M+M and with very positive impression. From the first meeting with client to the final “take over”, the staff from M+M was showing the client a god portion of flexibility as well listening ability.

Jihan Vinberg, Senior Application Engineer Weckman AB

Current status:

Both turbine plants have been running smoothly since commissioning in 2011 with only marginal modifications.

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