Cooling capacity of experimental system with natural refrigerant circulation and condenser radiative cooling




radiative cooling, effective radiation, natural circulation, refrigeration machine, thermosiphon system, energy saving


The surface of the Earth is a source of radiation of thermal energy, which, passing through the atmosphere, is partially absorbed while the bulk of the energy is released into the surrounding outer space. A cooling technique based on this physical phenomenon is known as radiative cooling (RC). It is possible to reduce the consumption of electricity for cooling, as well as to reduce capital costs, by integrating the unit with radiative cooling directly into the circulation circuit of the refrigerant of the refrigeration machine. An experimental refrigeration system has been designed, in which in the cold periods of the year the removal of heat from the cooled object is carried out due to the mode of natural circulation of the refrigerant from the evaporator to the heat exchanger, cooled by radiative cooling. A refrigeration system with natural circulation and radiative cooling of the refrigerant R134a was experimentally studied during the autumn period in Almaty. The experimental study established that the chamber is cooled with the help of the examined system while the temperature in the cooled volume is maintained by 5...7 K above ambient air temperature at night. The dependence of the air temperature in the refrigerating chamber on the temperature of the atmospheric air has been determined. A procedure for assessing the cooling capacity of the system has been devised.

The study reported here demonstrated the possibility of using radiative cooling to remove heat under the mode of natural circulation of the refrigerant.

The refrigeration system reduces energy consumption in the cold seasons by diverting heat to the environment without the compressor operating

Author Biographies

Alexandr Tsoy, Almaty Technological University


Department of Machines and Devices of Manufacturing Processes

Alexandr Granovskiy, Almaty Technological University

Senior Researcher, Master of Technical Sciences

Department of Machines and Devices of Manufacturing Processes

Diana Tsoy, Almaty Technological University


Department of Machines and Devices of Manufacturing Processes

Dmitriy Koretskiy, Almaty Technological University

Junior Researcher, Graduate Student

Department of Machines and Devices of Manufacturing Processes


  1. Zhao, B., Hu, M., Ao, X., Chen, N., Pei, G. (2019). Radiative cooling: A review of fundamentals, materials, applications, and prospects. Applied Energy, 236, 489–513. doi:
  2. Liu, J., Zhou, Z., Zhang, J., Feng, W., Zuo, J. (2019). Advances and challenges in commercializing radiative cooling. Materials Today Physics, 11, 100161. doi:
  3. Family, R., Mengüç, M. P. (2017). Materials for Radiative Cooling: A Review. Procedia Environmental Sciences, 38, 752–759. doi:
  4. Samuel, D. G. L., Nagendra, S. M. S., Maiya, M. P. (2013). Passive alternatives to mechanical air conditioning of building: A review. Building and Environment, 66, 54–64. doi:
  5. Tevar, J. A. F., Castaño, S., Marijuán, A. G., Heras, M. R., Pistono, J. (2015). Modelling and experimental analysis of three radioconvective panels for night cooling. Energy and Buildings, 107, 37–48. doi:
  6. Man, Y., Yang, H., Qu, Y., Fang, Z. (2015). A Novel Nocturnal Cooling Radiator Used for Supplemental Heat Sink of Active Cooling System. Procedia Engineering, 121, 300–308. doi:
  7. Thomason, H. E. (1965). Pat. No. US3295591A. Apparatus for cooling and solar heating a house. declareted: 09.09.1965; published: 03.01.1967. Available at:
  8. Bagiorgas, H. S., Mihalakakou, G. (2008). Experimental and theoretical investigation of a nocturnal radiator for space cooling. Renewable Energy, 33 (6), 1220–1227. doi:
  9. Baer, S. C., Mingenbach, W. (2000). Pat. No. US6357512B1. Passive heating and cooling system. declareted: 26.07.2000; published: 19.03.2002. Available at:
  10. Tsoy, A. P., Granovskiy, A. S., Tsoy, D. A. (2013). Pat. No. 30048 KZ. Sposob proizvodstva kholoda i ustroystvo dlya ego osuschestvleniya. No. 2013/0849.1; declareted: 26.06.2013; published: 15.06.2015. Available at:
  11. McCann, N. (2007). Pat. No. US20090090488A1. Night sky cooling system. declareted: 05.10.2007; published: 03.10.2008. Available at:
  12. Tsoy, A. P., Baranenko, A. V., Granovsky, A. S., Tsoy, D. A., Dzhamasheva, R. A. (2020). Energy efficiency analysis of a combined cooling system with night radiative cooling. International Conference on Science and Applied Science (ICSAS2020). doi:
  13. Titlov, A., Osadchuk, E., Tsoy, A., Alimkeshova, A., Jamasheva, R. (2019). Development of cooling systems on the basis of absorption water-ammonia refrigerating machines of low refrigeration capacity. Eastern-European Journal of Enterprise Technologies, 2 (8 (98)), 57–67. doi:
  14. Goldstein, E. A., Raman, A. P., Fan, S. (2017). Sub-ambient non-evaporative fluid cooling with the sky. Nature Energy, 2 (9). doi:
  15. Tsoy, A. P., Granovskiy, A. S., Tsoy, D. A. (2018). Pat. No. 4789. Sistema khladosnabzheniya s radiatsionnym otvodom teploty. No. 2020/0098.2; declareted: 02.10.2018; published: 13.03.2020, Bul. 10. Available at:
  16. Ezekwe, C. I. (1990). Performance of a heat pipe assisted night sky radiative cooler. Energy Conversion and Management, 30 (4), 403–408. doi:
  17. He, T., Mei, C., Longtin, J. P. (2017). Thermosyphon-assisted cooling system for refrigeration applications. International Journal of Refrigeration, 74, 165–176. doi:
  18. Lamaison, N., Marcinichen, J. B., Szczukiewicz, S., Thome, J. R., Beucher, P. (2015). Passive two-phase thermosyphon loop cooling system for high-heat-flux servers. Interfacial Phenomena and Heat Transfer, 3 (4), 369–391. doi:
  19. Cataldo, F., Thome, J. R. (2018). Experimental Performance of a Completely Passive Thermosyphon Cooling System Rejecting Heat by Natural Convection Using the Working Fluids R1234ze, R1234yf, and R134a. Journal of Electronic Packaging, 140 (2). doi:
  20. Tamura, Y., Koyatsu, M., Machida, A. (2002). Pat. No. US7293425B2. Thermo siphon chiller refrigerator for use in cold district. declareted: 13.05.2002; published: 13.11.2007. Available at:
  21. Sudnev, I. N., Bryzgalova, O. (2018). Kholodil'noe serdtse Udmurtii. Kezskiy syrzavod - zhemchuzhina v korone energoeffektivnosti komosa. Kholodil'naya Tekhnika, 2, 38–40.
  22. Zhao, D., Aili, A., Zhai, Y., Lu, J., Kidd, D., Tan, G. et. al. (2019). Subambient Cooling of Water: Toward Real-World Applications of Daytime Radiative Cooling. Joule, 3 (1), 111–123. doi:
  23. Chen, Z., Zhu, L., Raman, A., Fan, S. (2016). Radiative cooling to deep sub-freezing temperatures through a 24-h day–night cycle. Nature Communications, 7 (1). doi:
  24. Nuzhdin, A. S., Uzhanskiy, V. S. (1986). Izmereniya v kholodil'noy tekhnike. Moscow: Agropromizdat, 368.




How to Cite

Tsoy, A., Granovskiy, A., Tsoy, D., & Koretskiy, D. (2022). Cooling capacity of experimental system with natural refrigerant circulation and condenser radiative cooling . Eastern-European Journal of Enterprise Technologies, 2(8 (116), 45–53.



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