Abstract <p>Spray cooling is a promising method of heat removal and is widely used in various industries and technologies, e.g., cooling of electronic components, metallurgy, aerospace engineering, and power engineering. However, its efficiency depends on many factors, including the characteristics of the spray flow, properties of the working fluid, and parameters of the heat transfer surface. Despite the intensive research in this area, many aspects of the influence of the nozzle geometry, droplet distribution, and heat transfer modes remain understudied. The present work is aimed at filling these gaps, which will enable optimization of heat transfer processes and improvement of the efficiency of cooling systems. Parameters such as the volume flow rate of liquid, droplet diameter and velocity, and their influence on the heat transfer process were studied in this work. The obtained experimental data were compared with known literature correlations for the non-boiling mode. The measured values of the flow velocity and the Sauter diameter of droplets generated by the nozzle were compared with theoretical calculations.</p>