Although this method worked for many years, it was unsatisfactory in two respects. For one thing, the total capacity of the biomass storage facility could never be fully utilised. To avoid overfilling, it was better to play it safe by ordering less. And for another, the plant managers thought the operating personnel still wasted too much time trying to figure out how long stocks would last. So they were a long way away from efficient inventory management. That’s why the engineering team was looking for a simple and reliable solution.
The biomass is stored in the form of wood pellets. These are located in a large bunker measuring 30 x 5 x 8 m. This huge storage capacity is necessary in order to be able to respond to increased demand during the heating season. Furthermore, the power plant process should never be interrupted, and certainly not for lack of fuel. Reliable, accurate measurement of the silo contents was therefore required to enable optimal material logistics planning. The challenge: The operating conditions in the bunker are extremely challenging due to high levels of buildup and dust. From time to time the material is pushed inwards with tractors and tracked vehicles, so there is a lot of material movement as well.