All material coming from living organisms is biomass, but not all organic matter lends itself to the efficient production of electricity. To evaluate the technical and economic feasibility of the process of converting biomass to energy are taken into account the parameters and conditions that characterize it.
Caloric power: Determines the available energy in biomass. The heating value is related to moisture content. The more moisture less fuel.
The energy released as heat when biomass is burned completely has a calorific value, this is the amount of energy per physical unit (Joule per kilogram).
The calorific value can be gross or net. The gross calorific value is the total amount of energy released in fuel divided by the weight. The net value is the amount of energy available after evaporation of the water contained in the biomass; this is the amount of energy harnessed and truly is always less than the gross calorific value.