Abstract
The moisture content of the charged wood chips is a significant factor affecting the gasification process. The increased moisture content increases the demand on the energy consumption, which is needed to cover the heat consumption related to the water evaporation and adversely affects the wood gas quality and input fuel amount. Monitoring of the moisture content in wood chips is therefore the diagnostic tools suitable to evaluate the operational parameters of the whole gasification process. Present paper describes the design of the suitable methodology to measure and estimate the wood chips moisture content. The issues related to the moisture content estimation include preliminary the selection of the suitable methodology based on the assumed moisture content in the wood chips. Further factor which needs to be considered is the fact that the moisture content in wood chips is time dependent due to the changing parameters of the ambient air (as temperature, pressure and air humidity). Correctly estimated moisture content will enable to improve the wood chips gasification process.
Highlights
Wood chips are the product of the cutting or other form of wood processing into the approximately equal fraction with or without the certain proportion of additives and bark
In spite of the fact that the drying in the oven is the reference method, it is essentially more time consuming than the compared method exploiting the analyser of humidity HR83
Due to its demands related to the preparation and duration of the measurement, the method of drying in the oven is not suitable method in case of need of the speedy and accurate estimation of the moisture content of wood chips
Summary
Wood chips are the product of the cutting or other form of wood processing into the approximately equal fraction with or without the certain proportion of additives and bark. Due to its quality they are suitable for the use in the energy production This is affected up to the certain level by the physical and chemical characteristics of the wood chips. This type of biomass is characterised by rather high and alternating moisture content which essentially affects the energy properties of fuel. Initial conditions of the drying media – air (its temperature and moisture content) and the absorption. EPJ Web of Conferences potential of water are decisive for the drying process [2, 4]
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