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Wood pellets are a high comfortable homogeneous fuel, which is wonderfully wellkept and it regulates the heat. Heating using wood pellets is a real alternative to normal (fossil) fuels and comfort is close to heating with natural gas. The main aim of the paper is to present the possibilities of calculation method in wood processing industry in Slovakia specializing in the production of wood pellets.
The most accessible and especially valuable for energy sector type of biomass is wood, its post-production residue as well as fuels based on wooden residue. One such fuel with the best prospects for further development is wooden pellet which due to its high stability and homogeneity guarantees the highest energy concentration per unit as well as the possibility for fully automated burning process. The aim of the article was researching the influence of selected factors on the increase in value of various types of wooden residue when processed into pellet. The research took into account the following variables determining this value: raw material intensity ratio depending on the type of material being used, sales price of a single unit of finished product, margin envisioned by the producer, production cost of wooden fuel and the cost of transport considered only in the situation when there is a need for purchasing raw material.
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Modeling temperature of pellet press matrix for wood pellets. On the basis of active industrial experiments on industrial equipment mathematical dependence is obtained, showing the change in temperature of the matrix during the granulation of wood pellets. This dependence, adequate to real conditions, can be effectively used to control this important parameter that provides stable operation of the equipment. Minimum temperature of the matrix, determined from the results of presented research, increases service life of matrix and reduces the probability of emergency situations.
This paper deals with the wood pellets market in the Slovak Republic and in the EU. Wood pellets are one of several processed biomass feedstocks that are traded internationally and used for energy. They are cleaner burning, have a higher energy density, and are easier to handle than firewood, chips, or other forms of wood fuel. In the growing market for renewable fuels, wood pellets are used as a supplement or substitute for coal in energy systems and as a thermal fuel source for commercial and residential heating. Advantages of wood pellets include (1) the main feedstock, which is wood waste from primary and secondary saw mills, and (2) the high energy density and consistency of the fuel, which allows international trade to be feasible. The aim is to analyse the current Slovak and European wood pellet markets including demand, supply and prices of pellets used for heating and power production. The focus of this market analysis is on the European market for pellet production and use, although the European trade of pellets does also include trade flows from non-European countries. The European Union is still the main market for wood pellets and will remain as such for the coming years.
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