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Alvesta Energi first in Småland with small-scale cogeneration

In Småland, Sweden, the biomass-fired district heat plant in Moheda is to be upgraded into a combined heat and power (CHP) plant. Energy utility Alvesta Energi AB has ordered a new type of small-scale steam turbine, an Organic Rankine Cycle (ORC) unit from compatriot Againity AB.
"We have chosen this as our first step in creating local, small-scale and renewable electricity,” said Mats Karlsson, CEO of Alvesta Energi.

The Moheda district heat (DH) plant is one of three biomass-fired DH plants owned by Alvesta Energi, which supplies electricity and district heating to parts of Alvesta municipality. During the summer of 2019, the new turbine will be connected to the Moheda plant. The technology is based on Organic Rankine Cycle (ORC), which enables electricity generation from the low-temperature hot water from the woodchip boiler.

The ORC turbine will have an output of 49.9 kW of electricity and will produce approximately 170 MWh of electricity on an annual basis.

We have chosen this as our first step in creating local, small-scale and renewable electricity. We do this with the help of an ORC unit linked to our hot water boiler and we expect to produce half our own annual requirement for electricity at the heating plant in Moheda. The simplicity of the ORC unit and minimal rebuilding of the existing facility are the major advantages, said Mats Karlsson, CEO of Alvesta Energi.

First turn-key delivery

The ORC installation to the heating plant consists of two pipes from the boiler circuit, two pipes from the district heating circuit and one electrical cable. Thanks to minimal maintenance and the low production cost of the turbine, the installation becomes profitable despite the relatively low electricity prices in the Swedish market.

We are pleased to be part of Alvesta Energi’s renewable efforts. We look forward to supplying one of our first turn-key projects at heating plants, where we are responsible for both machine delivery, installation, pipe routing, and electrical connection, said David Frykerås, CEO of Againity.

The ORC turbine order is the ninth in Sweden for the Norrköping-based company and most installations have been at biomass-fired hot water boilers. There are over 400 heat plants in Sweden that do not have power generation capacity.

David Frykerås (left), Againity, and Hans Christoffersson, Alvesta
Energi, at Moheda heat plant (photo courtesy Againity).

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