Physical Modeling of Thermal Processes of the Air Solar Collector with Flow Turbulators

2018;
: pp. 9 – 16
https://doi.org/10.23939/jeecs2018.01.009
Received: March 12, 2018
Revised: April 16, 2018
Accepted: April 27, 2018
1
Department of Heat and Gas Supply, and Ventilation, Lviv Polytechnic National University
2
Lviv Polytechnic National University, Department of Heat and Gas Supply, and Ventilation
3
Lviv Polytechnic National University
4
Lviv Polytechnic National University

The analysis of existing systems of solar air heating has been carried out. The physical model of the solar air collector (SAC) with additionally installed flow turbulators, which are located in the air channel of the solar collector, is presented to improve its thermal characteristics and efficient use in temperate climates. The energy balances for the five key elements of the SAC have been presented and the balance equations system has been written. To determine the geometrical and heat engineering parameters of the flow turbulators, a number of graphical dependencies have been recorded. We found out that in the air channel of the solar collector there is a transitional movement of the heat carrier, and the maximum coefficient of convective heat exchange between the turbulator of flow and air is observed at the angle of inclination of the heat absorber of 45 deg. The computer simulation of thermal processes occurring in the air channel of the solar collector was carried out and we discovered that the power of the proposed SAC increased by 23% compared to the solar collector with a flat heat-absorbing plate.

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V. Zhelykh, K. Kozak, O. Dzeryn, V. Pashkevych. Physical modeling of thermal processes of the air solar collector with flow turbulators. Energy Eng. Control Syst., 2018, Vol. 4, No. 1, pp. 9 – 16. https://doi.org/10.23939/jeecs2018.01.009