Aggersvold Estate A/S

Aggersvold Estate strengthens its sustainable energy supply with another Linka® wood chip boiler (Boiler II).

The investment enables an expanded use of wood chips sourced from the estate’s own forests, where residual materials such as branches and twigs are repurposed as fuel. This solution reduces transportation needs and ensures a green and cost-effective energy source.

With Boiler II, the estate increases both capacity and flexibility in its heating supply, making the energy system more robust and reliable. At the same time, the investment builds on the experience gained from Boiler I, maximizing the overall efficiency of the solution.

The new boiler is a step towards an even greener and more efficient energy operation, reducing CO₂ emissions while ensuring a stable supply for future needs.

The boiler system, an 800 kW Linka© H hot water boiler, is delivered with a wood chip scraper floor. Together with Linka’s patented combustion technology, this ensures maximum fuel utilization. The overall system control is managed by a CTS system, which initiates the boiler’s start sequence via a start signal.

This once again demonstrates the integrated interaction between the control system and the associated technical components.

The wood chips are automatically transported via augers from a walking floor, which is activated by a signal from the boiler control when the boiler’s feeding process is initiated. The wood chips are then conveyed via augers into the boiler.

The walking floor consists of multiple scraper frames that move the chips to a cross auger, where right and left augers transport the fuel to a central drop chute, monitored by photocells. If the augers run empty, hydraulic cylinders are automatically activated. The system is designed for forest wood chips and can handle varying loading heights, adapting to specific needs.

Inside the boiler’s combustion chamber, a movable step grate is installed, divided into three combustion zones to minimize slag formation. The step grate elements are moved by an electric actuator. Linka®’s globally patented system, utilizing a co-current combustion air principle, improves both efficiency and emissions performance.

The flue gas from the boiler passes through a Linka® 3 x 2 multi-cyclone, significantly reducing dust emissions before being released through the chimney.

Ash is finally transported to the new 1.2 m³ ash container, which can store approximately eight days’ worth of ash at continuous full load. All ash augers are designed with an automatic reversal function.

The new accumulation tank has been strategically selected to create greater flexibility in the energy supply. The tank allows for optimized operation by storing excess heat and releasing it as needed, enhancing system efficiency and resilience.

This investment is also a crucial step toward future expansions, as Aggersvold Estate is considering supplementing the system with additional energy sources such as a new electric boiler and a wind turbine. The combination of these technologies will enable optimal utilization of renewable energy sources, reduce dependence on fossil fuels, and strengthen the estate’s green profile in the long term