Case

Green Energy Supply – with Financial Gain

LINKA Energy

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Hjallerup Heating Plant's change to biofuel has already reduced their prices on district heating.

Hjallerup Heating Plant had a Linka straw system with shredder installed. In the future the plant is expected to supply the entire area with heating, 7 months of the year. The change to biofuel has already reduced the prices for district heating in the area.

”They offered us helpful consultancy when we were choosing a new plant, and the entire Linka team worked very well with our employees. In the future we hope to use heat from biofuel year round as a supplement to our solar heating”, says Kaj Olesen, chairman of the board at Hjallerup Heating Plant.

Background

Hjallerup Heating Plant was looking to reduce the users heating prices by installing a biomass plant as a supplement to their use of solar heating, which cannot supply the entire area year round.

The systems primary purpose is to supply Hjallerup and Klokkerholm with stabile, secure and environmental-friendly district heating. Linka was chosen to supply the system, as we were able to deliver a dependable plant to a competitive price.

“It was important for us to receive a system prepared for the future, and Linka offered us exactly this”, says  Kaj Olesen.

Considerations

Hjallerup initially requested a 1,800 kW plant dimensioned for 2,300 kW. However, through dialogue with Linka it was decided that a 3,000 kW plan would secure the areas increasing demand for district heating.

Due to an easy access to inexpensive straw, it was decided beforehand that this would be the main fuel.

“Straw is the cheapest fuel and it offers the biggest effect on heating prices”, says Kaj Olesen.

The system is prepared for a switch to wood pellets, if Hjallerup wishes to do so in the future. This way, the heating plant is also well-prepared regarding fuel type.

The solution

The implemented solution was a 3,000 kW hot water boiler based on straw as primary fuel. The TWIN shredder is fed by an automated straw crane and automatic string removal, ensuring a fully automated plant.

The biomass plant is developed to handle a varying quality in straw, and it is prepared for using wood pellets as a supplement.

The straw system is equipped with bag filter, cleaning the flue gas and hereby reducing dust.

Product specifications

Customer: Hjallerup District Heating
Fuel type: Straw
Plant size: 3,000 kW
Plant type: Hot water plant
Energy type: District heating

Results

Efficiency: 93.17 %

The plant is using Linka’s world patented combustion technique, where heated air is added to create the optimal amount of turbulence in the combustion area. Hereby, the gases developed are completely burned which ensures a very high efficiency.

Reduction in heating prices: DKR 30 per mWh

The switch to a Linka biomass plant along with the use of solar heating has resulted in lower heating prices (from 2017) for the customers in the entire area.

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