Dissipative energy fluxes in evaporative cooling of a substrate by droplets carried in by an air flow have been measured. It has been shown that the frequency of feeding the spray and the difference between its temperature and the temperature of the substrate influence the efficiency of its cooling. Spraying pulses with a relative duration of 0.5 and 0.25 have been investigated. It has been found that the form of these pulses does not influence, in practice, the intensity of cooling of the substrate at spray-feed frequencies higher than 3 Hz. It has been confirmed that the thermal conductivity and thickness of the substrate substantially influence the value of the energy flux dissipated by it.
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References
V. I. Terekhov, P. N. Karpov, A. D. Nazarov, and A. F. Serov, Unsteady heat transfer at impinging of a single spray pulse with various durations, Int. J. Heat Mass Transf., 158, Article 120057 (2020).
S. Khandekar, G. Sahu, K. Muralidhar, E. Ya. Gatapova, O. A. Kabov, R. Hu, X. Luo, and L. Zhao, Cooling of highpower LEDs by liquid sprays: Challenges and prospects, Appl. Therm. Eng., Article 115640 (2020).
X. Zhao, Zh. Yin, B. Zhang, and Z. Yang, Experimental investigation of surface temperature non-uniformity in spray cooling, Int. J. Heat Mass Transf., 146, Article 118819 (2020).
A. D. Nazarov, A. F. Serov, V. I. Terekhov, and K. A. Sharov, Experimental investigation of evaporative pulse-spray impingement cooling, J. Eng. Phys. Thermophys., 82, No. 6, 1160–1166 (2009).
P. N. Karpov, A. D. Nazarov, A. F. Serov, and V. I. Terekhov, Evaporative pulse-spray impingement cooling of a binary solution of ethanol and water, Pis′ma Zh. Tekh. Fiz., 41, No. 14, 8–15 (2015).
C. Sodtke and P. Stephan, Spray cooling on micro structured surfaces, Int. J. Heat Mass Transf., 50, 4089–4097 (2007).
T. Lim, S. Han, J. Chung, J. T. Chung, S. Ko, and C. P. Grigoropoulos, Experimental study on spreading and evaporation of inkjet printed pico-liter droplet on a heated substrate, Int. J. Heat Mass Transf., 52, 431–441 (2009).
Yu. A. Stankevich and S. P. Fisenko, Isothermal deposition of droplets and nanoparticles from the incident gas onto a substrate, J. Eng. Phys. Thermophys., 88, No. 6, 1142–1150 (2015).
Y. A. Khodyko, V. I. Saverchenko, and S. P. Fisenko, Features of evaporation of an ensemble of femto-picoliter droplets on a substrate. Experiment and simulation, Interfacial Phenom. Heat Transf., 6, Issue 3, 231–238 (2018).
O. G. Penyazkov, V. I. Saverchenko, and S. P. Fisenko, Regimes of electrostatic deposition of femtoliter droplets of solutions on the electrode substrate at low pressure, Dokl. Akad. Nauk Belarusi, 58, No. 5, 102–106 (2014).
V. I. Baikov, N. V. Pavlyukevich, A. K. Fedotov, and A. I. Shnip, Nonequilibrium Processes of Heat and Mass Transfer [in Russian], Vyshéishaya Shkola, Minsk (2018).
E. L. Talbot, A. Berson, P. S. Brown, and C. D. Bain, Evaporation of picoliter droplets оn surfaces with a range of wettabilities and thermal conductivities, Phys. Rev. E, 85, Article 061604 (2012).
V. I. Saverchenko, S. P. Fisenko, and Yu. A. Khodyko, Kinetics of evaporation of a binary picoliter droplet on a substrate at a low pressure, Kolloid. Zh., 77, No. 1, 79–84 (2015).
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 94, No. 5, pp. 1255–1259, September–October, 2021.
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Saverchenko, V.I., Fisenko, S.P. Evaporative Cooling of a Substrate by a Pulse-Periodic Spray with Femtoliter Droplets. J Eng Phys Thermophy 94, 1227–1231 (2021). https://doi.org/10.1007/s10891-021-02403-9
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DOI: https://doi.org/10.1007/s10891-021-02403-9