The wide application of microprocessor technology in various branches of industry and its constant evolutionary updating create all the prerequisites for solving applied problems of controlling thermal and heat-mass exchange processes in the technology of obtaining dry CO2 extracts from plant raw materials. An effective replacement of non-renewable energy sources in heat supply systems with heat from renewable and secondary energy resources is implemented in the heat pump technology for obtaining dry CO2 extracts, which considers two related processes – supercritical fluid CO2 extraction of plant materials and spray drying of liquid extract using a cascade three-stage heat pump. Microprocessor control of technological modes of a rather complex technology is impossible without automation tools, computer and software. In this regard, an algorithm for microprocessor control of the technology for obtaining dry CO2 extracts is proposed, taking into account the bilateral restrictions imposed on the controlled parameters. It is shown that increasing the accuracy and reliability of control at all stages of obtaining dry CO2 extracts allows for stabilization of process modes in the range of acceptable values, due to obtaining a high-quality product with minimal energy costs. The paper presents a functional diagram of a multichannel control system, including a two–column extractor with reversible pumps, a spray dryer, a cascaded three-stage heat pump (working media - freons R123, R124 and R1270) and a two-section apparatus for condensation of moisture from exhaust air with regeneration. Calculated dependences are proposed for determining the amount of evaporated moisture and the current heat transfer coefficient, according to the deviation of which the ratio of air and antifreeze consumption is adjusted. The experimental verification of the algorithm was carried out on an extraction autoclave unit (operating pressure up to 500 atm, temperature up to 250 ° C) in the production conditions of the NPC All-Russian Research Institute of the Feed Industry (Voronezh). Optimal intervals for regulating technological parameters during subcritical and supercritical extraction have been determined for three types of raw materials (chicory roots, St. John's wort, Spirulina platensis). The implementation of the proposed algorithm makes it possible to reduce specific energy consumption by 7-10% due to the rational use of energy resources in closed thermodynamic cycles.

1. Zhakova K.I., Mironova N.P. Modern trends in the development of food production technologies. Food Industry: Science and Technology. 2022. vol. 15. no. 1. pp. 6–12. (in Russian).

2. Trotsenko V.V., Fedorov V.K., Zabudsky A.I., Komendantov V.V. Control systems of technological processes and information technologies: a textbook for universities. 2nd ed., revised and expanded. Moscow: Yurayt, 2020. 136 p. (in Russian).

3. Kurochkin A.A., Shaburova G.V., Gordeev A.S., Zavrazhnov A.I. Equipment and automation of processing industries: a textbook for universities. 2nd ed., revised and expanded. Moscow: Yurayt, 2020. 586 p. (in Russian).

4. Gurov V.V. Microprocessor systems: a textbook. Moscow: INFRA-M, 2016. 336 p. (in Russian).

5. Haleem A., Javaid M., Singh R.P. et al. Hyperautomation for the enhancement of automation in industries. Sensors International. 2021. vol. 2. article 100124. doi: 10.1016/j.sintl.2021.100124.

6. Jamilov S., Ergashev O., Abduvaxobov M. et al. Improving the temperature resistance of traction electric motors using a microprocessor control system for modern locomotives. E3S Web of Conferences. 2023. vol. 401. article 03030. doi: 10.1051/e3sconf/202340103030.

7. Polyuschenkov I.S. Model-based design of microprocessor control system for direct current servo electric drive. Russian Electrical Engineering. 2023. vol. 94. no. 2. pp. 84–90. doi: 10.3103/S1068371223020083.

8. Kudryashov V.S., Ivanov A.V., Alekseev M.V., Ryazantsev S.V. Fundamentals of programming of microprocessor controllers in digital process control systems: a textbook. Voronezh: VSUET, 2014. 144 p. (in Russian).

9. Patent no. 2810005 C1, Russian Federation, IPC C11B 9/00, C11B 1/10. Method for obtaining dry CO2 extracts from plant raw materials and installation for its implementation. Dombrovskaya Ya.P., Drannikov A.V., Shevtsov A.A.; applicant and patent holder VSUET. no. 2023105935; filed 14.03.2023; publ. 21.12.2023. Bull. no. 36. (in Russian).

10. Patent no. 2830883 C1, Russian Federation, IPC C11B 1/10. Method for controlling the technology of obtaining dry CO2 extracts from plant raw materials. Drannikov A.V., Shevtsov A.A., Dombrovskaya Ya.P.; applicant and patent holder VSUET. no. 2024109219; filed 05.04.2024; publ. 26.11.2024. Bull. no. 33. (in Russian).

11. Kasyanov G.I. Technique and technology of using carbon dioxide in sub- and supercritical state. Bulletin of VSUET. 2014. no. 1. pp. 130–135. (in Russian).

12. Kasyanov G.I. Efficiency of using carbon dioxide as an extractant. In: Improving the quality and safety of food products: Proceedings of the X All-Russian Scientific and Practical Conference. 2020. pp. 102–105. (in Russian).

13. Andriychuk V., Kostyk L., Filiuk Y. et al. Microprocessor Control of the Electric Drive of Variable Radiation Installation and Ensuring of Operation Reliability. Science and Innovation. 2024. vol. 20. no. 5. pp. 62–70. doi: 10.15407/scine20.05.062.

14. Ahmed Z., Hassan W.H., Alizadeh A.A. et al. Machine learning-based exergy and environmental optimization of a photovoltaic–thermal-assisted CO2 ejector heat pump. The European Physical Journal Plus. 2025. vol. 140. no. 12. article 1217. doi: 10.1140/epjp/s13360-024-05883-3.

15. Peng C., Zeng Z., Dang C. et al. Energy and environmental performance analysis of solar-assisted heat pump drying system using natural working fluid carbon dioxide. Drying Technology. 2025. vol. 43. no. 4. pp. 771–783. doi: 10.1080/07373937.2024.2445624.

16. Guo Y., Wang Y., Liu Y. et al. Optimizing discharge pressure control in carbon dioxide heat pumps using particle swarm optimization. Applied Thermal Engineering. 2025. vol. 260. article 125008. doi: 10.1016/j.applthermaleng.2024.125008.

17. Akram H., Zafar H., Abbasi B.H. The chicory root (Cichorium intybus var. sativum) frontier: pioneering biotechnological advancements. Phytochemistry Reviews. 2025. pp. 1–25. [Online first]. doi: 10.1007/s11101-025-10123-8.

18. Kostrzewa D., Mazurek B., Kostrzewa M., Jóźwik E. Carotenoids and Fatty Acids Obtained from Paprika Capsicum annuum by Supercritical Carbon Dioxide and Ethanol as Co-Extractant. Molecules. 2023. vol. 28. no. 14. article 5438. doi: 10.3390/molecules28145438.

19. Duda Ł., Kłosiński K.K., Budryn G. et al. Medicinal use of chicory (Cichorium intybus L.). Scientia Pharmaceutica. 2024. vol. 92. no. 2. article 31. doi: 10.3390/scipharm92020031.

20. Pattiram P.D., Abas F., Suleiman N. et al. Edible oils as a co-extractant for the supercritical carbon dioxide extraction of flavonoids from propolis. PLoS ONE. 2022. vol. 17. no. 4. article e0266673. doi: 10.1371/journal.pone.0266673.