Main Problems of Hydrodynamics of a Flat-Plane Solar Collector

Fayziev  Zafar; Yuzbayeva  Shokhida; Dilmuradova  Mohida

doi:10.51699/cajotas.v7i1.1655

Authors

Fayziev Zafar Samarkand State of Architecture - Construction University, Uzbekistan
Yuzbayeva Shokhida Samarkand State of Architecture - Construction University, Uzbekistan
Dilmuradova Mohida Samarkand State of Architecture - Construction University, Uzbekistan

DOI:

https://doi.org/10.51699/cajotas.v7i1.1655

Keywords:

Solar Collector, Hydrodynamic, Efficiency, Optimization, Flow, Circulation

Abstract

In this paper, the relevant hydrodynamic aspects occurring in the implementation of flat-plate solar collectors are reviewed. It studies causes for non-uniform coolant flow distribution, which plays a role in heat transfer and system losses. Particular attention is paid to the formation of air lock, increase of hydraulic resistance and effect of flow situation on overall collector efficiency. It underlines the importance of enhance design of distribution systems, optimal coolant flow and fouling prevents for better performance in solar collector. The reduction or elimination of hydrodynamic problems leads to enhanced reliability and longevity of solar thermal systems.

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References

R. K. Shah and A. L. London, Laminar Flow and Convection in Channels. Moscow, Russia: Mir, 1981, p. 320.

F. P. Incropera and D. P. DeWitt, Fundamentals of Heat Transfer, 7th ed. Hoboken, NJ, USA: Wiley, 2018, p. 1048.

V. Gnielinski, “New equations for calculating heat transfer in turbulent flows,” International Chemical Engineering, vol. 16, pp. 359–368, 1976.

F. W. Dittus and L. M. K. Boelter, “Heat transfer in automobile radiators of the tubular type,” University of California Publications in Engineering, vol. 2, no. 13, pp. 443–461, 1930.

J. A. Duffie and W. A. Beckman, Solar Engineering of Thermal Processes, 5th ed. Hoboken, NJ, USA: Wiley, 2020.

S. A. Kalogirou, Solar Energy Engineering: Processes and Systems, 3rd ed. Cambridge, MA, USA: Academic Press, 2020.

V. G. Timofeev and A. V. Kozlov, “Study of hydrodynamics and heat transfer in solar collector channels,” News of Universities. Power Engineering, no. 2, pp. 45–52, 2019.

A. A. Gavrilov, “Mathematical modeling of hydrodynamic processes in solar collectors,” Thermal Power Engineering, no. 4, pp. 33–39, 2021.

S. K. Natarajan and K. S. Reddy, “Numerical study of flow maldistribution in flat plate solar collectors,” Applied Thermal Engineering, vol. 145, pp. 361–372, 2018.

R. Kumar and M. A. Rosen, “Thermal and hydraulic performance of solar air heaters with artificial roughness,” Renewable and Sustainable Energy Reviews, vol. 15, pp. 3801–3819, 2011.

Y. K. Rashidov, J. T. Orzimatov, K. Y. Rashidov, and Z. X. Fayziev, “The method of hydraulic calculation of a heat exchange panel of a solar water-heating collector of a tube–tube type with a given nonuniform distribution of fluid flow along lifting pipes,” Applied Solar Energy, vol. 56, no. 1, pp. 30–34, 2020.

Z. K. Fayziev, “Pressure losses in Venturi pipes, their rational forms and coefficients of local resistance,” in Proc. AIP Conf., vol. 2762, no. 1, p. 020012, Dec. 2022.

Y. K. Rashidov and Z. Kh. Fayziev, “Self-draining solar power plants: experience of development and application in global and domestic practice,” 2019.

Z. X. Fayziev and K. Y. Rashidov, “Calculation of hydraulic shock in self-drainable helioinstallations,” Society and Innovations Special, vol. 1, no. 1, pp. 16–29, 2020.

Y. K. Rashidov, M. M. Ismoilov, K. Yu. Rashidov, and Z. F. Fayziev, “Determination of the optimal number of calculation layers of a multilayer water stratification heat accumulator when calculating a self-regulating active element,” in Environmental, Industrial and Energy Safety–2019, pp. 1372–1376, 2019.