Determining the optimal placement scheme and height of elements that accelerate heat exchange processes in solar air heater collectors through mathematical modeling

In this study, the issue of providing heat energy to a small utility room from a solar air heater collector in the climate of Uzbekistan was considered. A diamond-shaped heat exchange accelerating element is used in the installed solar air heater collector. The total working surface is 1 m2. After installing the solar air heater collector, the thermal energy balance of the service room was compiled. As a result, it was determined that 81355 W of thermal energy is required during the day to maintain the room temperature at a normal level. The amount of heat required for the sunny time of the day was 28873 W. The amount of heat received from the solar air heater collector was 1350 W. As a result of the calculations, it was found that the total working surface is 21 m2 on average to provide 100% of the required amount of heat in sunny weather with the help of a solar air heater collector. The calculation process was carried out for 06.01.2023. Covering the daily amount of heat required by the consumer with the help of a solar air heater collector is considered very complicated and requires a lot of money. Therefore, during the design of the heat supply from the solar air heater collectors, it is appropriate to determine the average amount of heat for the season at 15-20%.

Energy saving using solar air heater collectors

Uzbekov,

Boynazarov,

Nasretdinova

et al. 2024

Hydrodynamic processes that occur in a solar air heater collector with a triangle channel

Abdukarimov,

Orzimatov,

Usmonov

et al. 2024

In this article focuses on the hydrodynamic processes that occur in the solar air heater collector with a bottomless triangular channel working at the expense of solar radiation. Factors that directly affect the heat exchange processes in the working Chamber of the solar air collector with an overhead triangular shape have been analyzed, including air flow in the channels, heating surface structures, acceleration of the heat exchange process and methods for calculating the main indicators such as pressure loss. The solar air heater is one of the main and widely used equipment that can convert solar energy into useful thermal energy. Solar air heaters are economically efficient due to their simple structural structure and can be widely used in household and industrial sectors. The main area of application of solar air heater collectors is heating, in addition to agricultural, fruits and vegetables, including various products, the drying of technological products can be widely used.

Investigation of solar air collectors with concave air duct

Abdukarimov,

Madraximov,

Maxsitaliyev

et al. 2024

In this article study attempts to study the thermal performance of solar air collectors with submersible air ducts and pipes. This study is conducting numerical analysis of the solar collector with pin wings and turbulators to study the effects on the Nusselt number. The paper begins with a numerical analysis of conventional air collectors and compares them with theoretical results. Reynolds numbers range from 2000 to 2500. Next, after the solar collector's performance is evaluated with the bath air with channels, the effects of turbulators of different heights on the Nusselt number are analyzed, followed by the combined effects of pin wings and turbulators. The results are comparable to conventional solar collectors, and suggest that the combined effects of pin wings and turbulators can significantly improve the thermal performance of solar air collectors. The results of this study may contribute to the development of renewable energy-based air conditioning, ventilation and heating systems.