Abstract
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.
Highlights
This paper is an extension of work originally presented in “International RussianAutomation Conference (RusAutoCon), Sochi, Russia, 2020” [1].An urgent problem of mankind is the effective provision of food to populations, taking into account population growth rates
Magnetic devices are used for the treatment of water and solutions
Intensive scale formation on the inner surfaces of the greenhouse heat supply system does not allow the installation of control elements of the automation system to regulate the temperature conditions of the greenhouse complex
Summary
This paper is an extension of work originally presented in “International RussianAutomation Conference (RusAutoCon), Sochi, Russia, 2020” [1].An urgent problem of mankind is the effective provision of food to populations, taking into account population growth rates. Automation Conference (RusAutoCon), Sochi, Russia, 2020” [1]. One of the possible solutions to this problem is the use of greenhouse complexes that allow year-round plant food production. Modern greenhouse complexes have significant automation, which enables an increase in productivity. A large number of greenhouse farms still use the greenhouses of older generations that do not provide for complex automation of technological processes. In such farms, automation systems are created for each of the subsystems of the microclimate system. The heat supply system is the main subsystem necessary for the functioning of the greenhouse complex year-round. There are various solutions for heat supply systems automation [2,3,4,5,6,7]
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