Effective Removal of Smoke and Particles
During roasting, smoke and particles are released that must be extracted to avoid contaminating the beans (e.g., bitter or dusty notes). Balanced pressure keeps the exhaust stable, without resistance from blockages such as oil or dust. An automatic pressure compensation system adjusts dampers to maintain differential pressure – for example, from 80% to 100% efficiency if the pipes are clogged. This reduces buildup and ensures a cleaner flavor.
Stable Heat Transfer and Uniform Roasting
Air pressure affects convection, which evenly transfers heat to the beans. Balanced airflow prevents hotspots or cold zones. Too much negative pressure can draw in cold air and lower the temperature, while positive pressure pushes smoke back. The result: Consistent Rate of Rise (RoR) and better flavor such as sweetness and brightness. Balanced systems also provide stable heat transfer, preventing uneven roasting.
Prevention of Operational Issues and Increased Lifespan
Seasonal changes (e.g., lower air density on hot days) can create imbalance that requires manual adjustment. Balanced systems compensate automatically, minimizing wear on fans and extending cleaning intervals – reducing downtime and production loss. Additionally, it helps maintain stable roasting profiles even under load.
Safety, Environment, and Energy Efficiency
Imbalance can push smoke out through unwanted openings or draw in contaminated air. Balanced pressure safely directs smoke to the afterburner or filter, reducing emissions and complying with ventilation regulations. Optimal speed reduces energy consumption, as fans do not struggle against counterflows. This also provides better energy efficiency and a safer working environment.
