Abstract
The technology of the drying plant functioning at the level of decision making for the production of pellet fuel was suggested. The use of the integrated system of the estimation of a change in the air moisture content in the drying chamber, obtained on the basis of the mathematical and logical simulation as a part of the cogenerating system, allows coordinating the temperature and aerodynamic drying modes of timber drying on the basis of a change in the rotation frequency of the electric motor of the air fan by measuring the air temperature at the inlet into the heat exchanger. For example, with the production of 5,8 thousand tons of wood pellets per year, it is possible to provide 860 apartments of the area of 120 m 2 with the pellet fuel, which allows reducing the cost value of the electric energy and of the heat production by 20–30 % and obtaining savings of financial resources up to 40 % with the use of pellet fuel for heating and hot water supply on the condition of considering the frequency regulation of the electric motor of the air fan for the timber drying
Highlights
Due to the opportunity of selling energy at “the green tariff”, the use of the bio fuel as a renewable energy source is a stimulating factor for producing both electricity and heat from one energy source [1, 2]
– to develop structural schemes of the logical simulation tem of nonlinear differential equations includes the equafor obtaining the functional information for decision-making tion of the state as a physical model of the heat exchanger, to maintain the operation and the identification of a drying the equation of energy of the transmission medium – the plant state as a part of cogeneration system; heater fueled by the cogeneration power plants, the equa
Note: αe is the coefficient of connective heat transfer from the heat transfer agent that heats up the walls of the heat exchanger Wt/(m2·K); αi is the coefficient of heat transfer from the wall of the heat exchanger to the air, Wt/(m2·K); k is the coefficient of the heat transfer, Wt/(m2·K)
Summary
Due to the opportunity of selling energy at “the green tariff”, the use of the bio fuel as a renewable energy source is a stimulating factor for producing both electricity and heat from one energy source [1, 2]. The measurement of the temperature and the air humidity as a drying agent in the drying chamber and the humidity of the dried timber, are not always used appropriately to support timber drying due to the complexity of measurements, which makes it impossible to use the measurements in the coherence to prevent the influence on the change in the parameters of drying for ensuring the continuous production of the pellet fuel All these facts substantiate the relevance of this work. – to develop structural schemes of the logical simulation tem of nonlinear differential equations includes the equafor obtaining the functional information for decision-making tion of the state as a physical model of the heat exchanger, to maintain the operation and the identification of a drying the equation of energy of the transmission medium – the plant state as a part of cogeneration system; heater fueled by the cogeneration power plants, the equa-.
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