Control of phyto-radiator energy flows in artificial lighting of sustainable agriculture

The paper presents scientific and technical solutions to improve the efficiency of phyto-emitters used in controlled plant cultivation to create sustainable farming systems. The author’s technology is described, which makes it possible to regulate the energy fluxes of a phyto-emitter during the growing process. The results are presented that determine the rational temperature range for the radiator of the phyto-emitter cooling system from +30 °C to -30 °C. It has been established that a decrease in the temperature of the radiator in this range for each 1 °C leads, on average, to an increase in PAR by 8.3 10 3 mW/cm 2 . The dependences of the PPFD distribution over the spectral ranges and over the surface, the radiation intensity and PAR as a function of the temperature of the radiator of the cooling system are obtained. The regularities of the influence of the temperature in the cooling system on the efficiency of the phyto-emitter as a whole have been determined. Taking into account the experimental data obtained, the scheme and principle of operation of a phyto-emitter with forced cooling have been developed.