Torrefied biomass energy efficiency compares favorably with raw pellet production despite the high temperatures used in torrefaction. In the TorrB® process, all heat is provided by an average of 10% of the feedstock energy if the biomass contains less than 35% moisture. In fact, despite the high temperatures used in torrefaction, the energy required to dry, torrefy and densify TorrB® briquettes is much less than that of producing standard wood pellets for several reasons:
- Our TorrB® drying and torrefaction processes use a small portion of the feedstock for energy needs, while traditional pellets need an external energy source for drying. [View diagram]
- Grinding raw wood is energy intensive compared to grinding torrefied wood.
- Densifying into pellets is more energy intensive than our briquetting technology.
In comparison to other torrefaction technologies which use clean wood chips, HM3 Energy directly torrefies forest waste.