Rationale for the application of the technological scheme of irradiation with separation of energy flows in the lighting systems of industrial greenhouses

Introduction. Ensuring the required parameters and characteristics of electromagnetic radiation of lighting irradiation facilities for greenhouses is an important task to improve the efficiency of energy use and the characteristics of crop production. The aim of the work is to determine the effective operation mode of technological irradiation scheme with separation of energy flows in lighting systems of industrial greenhouses. Materials and Methods. In the developed model of the irradiation technological scheme, constructive decisions make it possible to divide the energy flows into components and to control these flows. It has been proposed that separate regulation of the voltage on the irradiator and the fan can be used to create conditions for changing the values of separate spectral lines of radiation in order to further assess the effect of these changes. Results. We obtained the results on the change of PPFD distribution depending on the voltage on the greenhouse irradiator from 198 to 242 V and the air temperature near the lamp from 38 to 47°C. The comparison of averaged PPFD values in the studied modes with the PPFD value in the nominal mode for these ranges allowed determining the mode at voltage 220 V and the air temperature near the lamp from 43 to 47°C as a rational for practical use in technological irradiation schemes with energy flows separation in the lighting systems of industrial greenhouses. Discussion and Conclusion. The development and application of rational modes for operation of greenhouse irradiators, taking into account the modes of network and lamp is the basis for greenhouse production with the use of alternative thermal energy.