A power plant in Northern Germany that uses biomass for fuel determined that they were experiencing reduced efficiency of their stainless steel heat exchanger. The reduced efficiency was caused by ash deposits produced by the combustion gases passing through the heat exchanger. The ash deposits had been building up on the outsides of the tubes and acted as an insulator, obstructing the transfer of heat energy through the tube walls.
After installing a Netter NHK 25 high-frequency impactor onto the heat exchanger, ash build up on the tubes has been eliminated. This has substantially increased the efficiency and service time of the equipment, while also improving profitability by reducing the amount of labor required for regular periodic cleaning.