Hjallerup District Heating

Green heating supply with financial gain

In late 2016 Hjallerup Heating plant had a Linka straw system installed, as a supplement to their use of solar heating. The switch to biofuel has already reduced prices on district heating in the area.

Background

Hjallerup Heating plant was looking to reduce the users’ heating prices by installing a biomass plant, which will be the main heating source 7 months out of the year, when the solar heat cannot supply the entire area.

The system’s primary purpose is to supply Hjallerup and Klokkerholm with stable and environmentally friendly district heating. Linka was chosen to supply the system, as we were able to deliver a dependable plant to a competitive price.

Considerations

Hjallerup initially requested a 1,800 kW plant dimensioned for 2,300 kW. However, through dialogue with Linka it was decided that the plant should be dimensioned for 3,000 kW, to accommodate the area’s increasing demand.

Due to their easy access to cheap straw, it was decided beforehand that this would be the main fuel. Straw also offers the greatest impact on heating prices.

The system is prepared for a switch to wood pellets in case an alternative fuel is needed in the future.

The solution

The implemented solution was a 3,000 kW hot water boiler based on straw as primary fuel. The TWIN shredder is automatically fed by an installed straw crane which ensures a highly automated plant. In addition an automatic string remover is also installed on the conveyor.

The 5-pass boiler is designed for a more efficient use of the heat, which causes higher efficiencies and a larger saving on fuel.

The biomass plant is developed to handle a varying quality in straw. It is also equipped with a bag filter, which cleans the flue gas and hereby reduces dust.

Specifications

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

93,17%

The plant is using Linka’s world patented combustion technology, 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.

District savings

30

DKK per mWh

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

 

"They offered us helpful advice 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."

Kaj Tranholm Olesen, Chairman of the board
Hjallerup District Heating