Impact of the partial absorption of solar radiation in translucent covers of the flat-plate solar collector housing on the heat losses of their light-absorbing heat-exchange panel into the ambient

It should be noted that theoretical and experimental studies in the field of semiconductors have shown good prospects for creating matrix and multilateral photoelectric converters (MPCs) with vertical p-n junctions. Such PV have undeniable advantages in the tasks of generating high output voltages and converting concentrated solar radiation. In addition, the implementation of such PVs in a multi-sensitive design makes it possible to reduce the consumption of semiconductor silicon by up to three to four times.But, in conditions of a dry, hot, continental and dusty climate, for example, in the republics of Central Asia, their heating is observed when the FP operates. This problem can be solved by using it in conjunction with microhydroelectric power plants or additional cooling. The hybrid system developed by the authors includes a solar power plant, a counter-rotor hydraulic unit with a reactive and active impeller, a cooling system and an automatic control system. The characteristics of this system were studied on the basis of mathematical modeling in the “Comsol multiphysics 6.1” software environment.In the simulation, the solar panel was cooled with air and water using electricity from a hydroelectric unit. According to the calculation results, the heating of the solar panel without forced convection at an outside air temperature of 400-450C was 1080C. Water was supplied through an aluminum cover installed behind the solar panel and which had channels. The solar panel temperature was 49.2°C and the water temperature was 48.2°C.When cooled by ambient air, the temperature of the solar panel was 67.7°C. The cooling system efficiency was 74% when comparing the energy expended to cool a 2m2 solar panel and the power added when cooling the panel.

Section: Solar Panel Cooling Systemmentioning

confidence: 99%

Results of mathematical modelling of the cooling system for solar panels of a hybrid power plant based on solar and hydraulic energy

Bozarov,

Aliev,

Kuchkarov

et al. 2024

“…Solar energy is a freely available, endless, environmentally friendly energy resource. [1][2][3]. One of the promising areas of renewable energy is the direct production of environmentally friendly heat for the air conditioning system [4][5][6], drying agricultural products with conversion of solar radiation flux density [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Optimization of geometrical parameters of the heat receiver of a solar air heating collector

Uzbekov,

Kuchkarov,

Boynazarov

et al. 2024

The article presents the optimization of the radiant surface of the solar air heating collector (SAH). As a radiation-receiving surface of the SAH, a surface is used, which is a system of metal drainage shavings and a V-shaped surface. Based on the study of the heat transfer process, an effective scheme of heat removal from the radiation-receiving surface of the SAH is presented. When optimizing the radiation-sensing surface of the SAH, the process of radiation-sensing of the surface, which depends on the geometric shape of the chips, is taken as the target function of the maximum. A formula is proposed for calculating the determination of the transmitted amount of the radiant flux of the sun to the unit of the frontal surface through the shape of the metal shavings from the value of the opening step angle in different thicknesses of the metal shavings. It has been confirmed that the solar radiant flux passing to the unit of the frontal surface through the metal chip shape reaches its maximum value in the following cases: when the chips are 0,002 m thick, they have an optimal angle φ = 58°, the transmitted energy of the radiant flux through the chip shape is E = 31%; with a chip thickness of 0,0005 m, the optimal angle is φ = 42°, the transmitted energy of the radiant flux through the chip shape is E = 41%; with a thickness of 0,001 m, the optimal angle is φ = 50°, the transmitted energy of the radiant flux through the chip shape is.

“…Optimizing the parameters of solar air heating collectors can be optimized according to air consumption, geometric dimensions, optimal location angle of the structure in relation to the sun, metal consumption and economic indicators. All parameters of optimization of KHKs are related to their geometric dimensions [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Hicham EL Feroual et al 1 -flat absorber with one air channel, 2 -V-shaped absorber with one air channel, 3 -flat absorber with counter flow, 4 -V-shaped absorber with counter flow analyzed by mathematical modeling in order to optimize its geometric parameters (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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

Kuchkarov,

Uzbekov,

Boynazarov

et al. 2024

In the article, the heat exchange accelerating elements used in the collectors of solar air heaters were investigated by thermal and hydraulic mathematical modeling by changing the location scheme and geometric dimensions in homogeneous environment. In this case, the height of the gap between the flat absorber and the transparent glass was 60 mm. The height of elements that accelerate heat exchange processes has increased from 10 mm to 60 mm. The location scheme is laid out in a corridor and a checkerboard pattern. According to the modeling results, the results of the solar air heater collector with the rhombic heat exchange accelerating element were found to be high.