Resource Indicators of Solar Photovoltaic Plants in the Republic of Uzbekistan. Part 2. Verifying Satellite Actinometric and Reanalysis Data for Conditions in Uzbekistan

Авезова, Н. Р.; Frid, S. E.; Lisitskaya, N. V.; Rakhimov, E. Yu.

doi:10.3103/s0003701x19050037

Cited by 11 publications

(3 citation statements)

References 18 publications

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“…After drying out of the large parts of the Sea, a salty desert-the Aralkum-has been formed that is subjected to wind erosion and results in white sand and dust storms. The problem of air pollution and climate change strongly influences human health, environment, and technical infrastructure, in particular, solar panel installations (Avezova et al 2019, Groll et al 2019. Now, the pre-Aral Sea region is an extreme continental climate area.…”

Section: Introductionmentioning

confidence: 99%

Physical and chemical properties of dust in the Pre-Aral region of Uzbekistan

Bazarbayev

Zhou

Allaniyazov

et al. 2022

Environ Sci Pollut Res

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The aim of this work is study of physical and chemical properties of dust of the Pre-Aral region of Uzbekistan such as Karakalpakstan and Khorezm that are located near the three deserts such as the Aralkum, Karakum, and Kyzylkum. The dust particles fell on glass have been collected in Karakalpakstan and Khorezm and studied systematically by employing wide range of methods. Particle volume vs size distribution has been measured with maximum around 600 nm and ~ 10 µm. The major and minor constituent materials present in the dust have been studied systematically by X-ray fluorescence spectroscopy, energy dispersive X-ray diffraction, and inductively coupled plasma optical emission spectroscopy. Main characteristic absorption bands corresponding to Si–O, Si–O-Si bonding in quartz and Fe–O bonds in hematite Fe2O3 have been identified by infrared and Raman spectroscopy. Quartz, hematite, lime, corundum, magnesia, and several other trace minerals have been identified in the dust particles. X-ray diffraction peaks corresponding to quartz, hematite, and corundum are sharp and are found to be more crystalline with some level of disorder. Analysis of the particle size and crystallinity on human being has been performed: disordered or crystalline quartz can create the lung disease; the particles in the size of 0.5–0.7 µm may produce diseases such as chronic silicosis, silicosis, and silica tuberculosis whereas hematite might create lung disease. Dust particles worsen optical transmittance of glass of the panels. Graphical abstract

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Section: Introductionmentioning

confidence: 99%

Physical and chemical properties of dust in the Pre-Aral region of Uzbekistan

Bazarbayev

Zhou

Allaniyazov

et al. 2022

Environ Sci Pollut Res

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“…As a major drawback of this type of collector, air pipes do not have the property of giving air a shedding motion at the expense of the outer surface plane. The result was found to be an increase in local resistance and not a high ability to provide heat [6][7]. Separately, it should be noted that the absorber-on a darkened surface directed towards the direction in which sunlight falls, converts solar energy into useful thermal energy using a heat carrier, in which the sun is the main constructive part of the air heater collector, being air-conducting channels of different shapes.…”

Section: Introductionmentioning

confidence: 99%

The effect of heat losses and heat transfer coefficient on the efficiency of the solar air heater collector

Abdukarimov,

Toxirov,

Boynazarov

et al. 2023

E3S Web of Conf.

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In this Article developed the heat balance equations for a solar air heater with a concave air pipe absorber, calculating the heat wastes lost from the barrier structures of the device. In addition, a special emphasis is placed on the issues of optimal placement of concave air pipes, optimal distances are selected between the air pipes. Issues of increasing its heat giving capacity are solved by the shading placement of concave air pipes. The result is an increase in the performance of the device by increasing the coefficient of heat transfer of the solar air heater collector with a concave air pipe absorber. To do this, the movement of concave tube absorbers with different geometric arrangements was studied. Also in this article, a heat balance equation was developed to determine the optimal geometric location of air pipes and the reliability of the results obtained was confirmed. According to the simulations carried out, the placement of a concave-tube in the form of a checkerboard on the surface of the absorber is calculated, perpendicular to the air flow, parallel to the air flow and in the form of a flat air pipe.

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“…This is due to an improvement in living standards, and, consequently, an increase in people's energy consumption and the need to maintain the environmental cleanliness of the environment. These circumstances are of particular importance for the states of the Central Asian region, in particular the southern part of Uzbekistan, characterized by a dry and hot climate, and the presence of continuous solar radiation [1,2]. Here there is a unique opportunity for the joint use of solar energy and the thermodynamic non-equilibrium of atmospheric air, which can provide the greatest economic and environmental benefits.…”

Section: Introductionmentioning

confidence: 99%

Opportunities and prospects for the use of solar energy for refrigeration of public buildings

Izzatillaev

Alimova

Usmonov

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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This paper describes the calculation of evaporative-radiant cooling of recycled water in summer air-conditioning systems. A differential equation for the heat balance of water flowing down an inclined plane is derived. As one possible way of increasing the efficiency of air conditioning systems based on cooling water by adiabatic evaporation in the air flow the use of night-time evaporative cooling of the water, followed by daytime cooling in insulated storage tanks. The temperature of the water chilled in this way is 3-4 °C lower than the temperature of the water chilled during the day, and the final water temperature is close to the saturation temperature of the outside air. The equations for calculation of mass transfer coefficients, radiation and heat transfer coefficient of an insulated bottom of an evaporative-radiant water-cooling unit are given. Based on the Mathcad program and the result of the calculation, the dependence of the final water temperature on the initial water temperature is obtained. As a result of the calculation, the specific heat capacity of the evaporative radiant water-cooling unit for the production of free cooling is determined.

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Resource Indicators of Solar Photovoltaic Plants in the Republic of Uzbekistan. Part 2. Verifying Satellite Actinometric and Reanalysis Data for Conditions in Uzbekistan

Cited by 11 publications

References 18 publications

Physical and chemical properties of dust in the Pre-Aral region of Uzbekistan

Physical and chemical properties of dust in the Pre-Aral region of Uzbekistan

The effect of heat losses and heat transfer coefficient on the efficiency of the solar air heater collector

Opportunities and prospects for the use of solar energy for refrigeration of public buildings

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