Optimal control of an autonomous lime solution dispenser to wheat straw when manufactured on mobile combined pellets for biogas plants
DOI:
https://doi.org/10.31548/energiya2(66).2023.027Abstract
The object of the study is the drive electric motor of the autonomous lime solution dispenser for wheat straw when making pellets for biogas plants. The purpose of the work is to determine the optimal control law of the drive electric motor of the autonomous dispenser of lime solution to wheat straw when pellets for biogas plants are produced on mobile harvesters. To achieve the goal, the following tasks were solved: the substantiation of the pellet production technology for biogas plants using mobile harvesters was carried out; a model of functioning of the drive electric motor of an autonomous dispenser of lime solution for wheat straw was developed. With the help of the proposed model, it is possible to determine the optimal control modes of the drive electric motor of the autonomous lime solution dispenser for wheat straw with minimal power consumption for heat losses and for overcoming viscous friction in the lime solution dosing process. The most important result of the research is the substantiation of the pellet production technology using the self-propelled Metitron 560 combine harvester using a special lime solution dispenser for extruded straw, which ensures the highest rate of methane release. The significance of the research results is that the use of pellets of extruded straw and lime allows to increase the rate of methane release by more than 60% compared to the fermentation of untreated straw. It is advisable to use an autonomous energy-efficient dispenser on the Metitron 560 harvester, which is capable of producing pellets of 6 to 12 mm in size from straw of various crops directly in the field with the addition of lime solution to increase biogas output. The advantage of using pellets from extruded wheat straw is also that such raw materials are better transported and stored in warehouses, which is necessary for the continuous operation of biogas plants, since agricultural waste is seasonal.
Key words: optimal management, autonomous dispenser, lime solution, straw, pellets for biogas plants
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