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This article presents the results of the simulation of an automatic control system for the heat supply of a greenhouse complex with a geothermal heat source, conducted in order to study the possibility of geothermal heat supply system automation. Scilab version 6.1 was used for simulation. Based on the results of the simulation, the optimal mode of the automation system function of the heat exchanger primary circuit was developed and implemented. Reagentless treatment of geothermal water in the heat supply system with an acoustic–magnetic device (designed and patented by the authors of this paper) can significantly reduce the intensity of scale formation in the heat exchanger and geothermal heat supply system equipment. It provides conditions for the automation of geothermal heat supply systems of greenhouses with a surface heat exchanger. Using an automation system allows greater accuracy and reliability in maintaining the required temperature regime (18–20 °C) in the greenhouse, reduces the frequency of system shutdown for unplanned cleaning of the heat exchanger and equipment, reduces the complexity of manual operations of heat exchanger and equipment maintenance (removal of sludge, scale) and reduces the economic costs of transportation and heat consumption.

The paper presents the research results of the mutual influence of pulse voltage, magnetic field strength gradient, and thermal regime for the energy consumption of an acoustic magnetic device. To carry out the research, a hypothesis has been put forward on the possibility of increasing the energy efficiency of the acoustic magnetic device due to the joint solution of three problems: electric, magnetic and thermal. For the experimental study of the hypothesis, a model of an acoustic-magnetic device was developed using the ELCUT 6.1 software. In the process of modelling a geometric model was created, the physical properties of the model blocks, electrical circuit were established. The laws for distribution of temperature both inside and on the surface of the device under long-term operating conditions, since incomplete use of heating possibilities leads to a lowpower electromagnetic field and to deterioration of magnetic processing, and overheating leads to destruction of interlayer insulation and turn-to-turn short circuit. The value of the temperature inside the pipeline through which the processed substance passes, since in the acoustic magnetic treatment of certain substances the temperature limits are strictly set, non-observance of which leads to unsatisfactory results. The obtained results show the possibility of reducing the power consumption of the acoustic magnetic device due to the use of pulse voltage of the meander type, ferrite ring as a radiator and magnetic circuit, and also a special material of the acoustic magnetic device body.

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