EFFECTS OF DUST ON THE PERFORMANCE OF PV PANELS

Performance of solar PV energy system is affected by many factors like solar radiation intensity, solar radiation geometry, temperature, wind speed and direction, relative humidity, dust, etc. Many researchers have been working on the effect of temperature on solar PV cell efficiency and have reported that increased cell temperature tends to reduce the efficiency of solar PV cell. Solar PV cell temperature also considerably deteriorates the mechanical properties of backsheet of solar PV panel. This paper reviews the various attempts to improve the performance of crystalline silicon solar photovoltaic (PV) system. Performance of a solar PV panel when exposed to hot and dry climate is different from performance of similar solar PV panel in cold climate. From solar beam radiation, light is a desired component whereas heat is not. Therefore many researchers have reported cooling techniques for Solar PV system. However, backsheet material of solar PV panel is one of the factors affecting the solar PV panel efficiency which is pulling the attention of many researchers for performance enhancement of Solar PV system. Solar PV cells using Perovskite material have emerged as one of next generation of photovoltaic technologies having capability of significant enhancement in solar cell efficiency.

Solar panel or solar photovoltaic array helps in maximum utilization of energy during daytime that is from sunrise to sunshade. However, shading on solar panels can have a huge impact on the performance of solar photovoltaic panels. This shading has severed effects on the output of solar cells. But most of the time a common misconception occurs that the partial shading does not make any impact on the output of solar panels. But solar photovoltaic panels are highly susceptible to changing atmospheric conditions and the shades falling on it. Solar insolation, the surrounding temperature, array configuration and shading on solar panels affect the performance of the solar photovoltaic array. Basically, the solar photovoltaic panel consists of several cells that are connected to each other in a series circuit. Because of this series connection, the performance of the solar panel is significantly reduced even if the smallest section of the solar panel is shaded. Due to any of the factors such as passing of the clouds, neighbouring buildings, towers, trees and the presence of the telephones poles which can exert its complete or partial shadow on the solar panels, performance of solar array can be affected. It can be investigated that the P-V characteristic curve varies under different atmospheric conditions and changing number of shaded modules of the solar photovoltaic string. Overheating of shaded cells is the major effect caused by partial shading of the photovoltaic module. It leads to the reduction of energy of the entire solar module. Here we are studying the harmful effects and variations caused by partial shading on the overall solar photovoltaic module’s performance. PSPICE and MATLAB are types of simulation models to test the performance of PV module and to present the result.

<p>Due to the increasing global energy demand and consequent climate change from burning fossil fuels, researchers are getting more focused on renewable energies as a potential solution to the world's energy problems. Solar energy is a prominent form of sustainable energy. The solar photovoltaic power generation system’s electrical performance is negatively influenced by several factors, including the impact of solar irradiance, incident angle, temperature, dust accumulation on the top of the solar cell, cracks in the solar panel, shadowing, shunt resistance, solar cell materials, load mismatch, maintenance and cleaning schedule, spectral mismatch loss, and cable loss. The direct environmental factors that have the biggest impact on efficiency are the effects of sun irradiance and temperature. This empirical investigation examined the impact of optical filters on the electrical efficiency of a 40W polycrystalline solar PV panel in India while considering real-time ambient conditions. Through the utilization of an optical filter, the solar PV panel's temperature is diminished, hence enhancing the output power of the solar panel. Based on the experimental findings, the utilization of a transparent plexiglass sheet equipped with a coolant system installed on the solar panels leads to a drop in the average operating temperature of the solar PV module by up to 6°C. Additionally, the output power is enhanced by up to 10W in comparison to the reference solar panel’s output performance.</p>

Solar energy is quite simple as the energy can be obtained from the sun directly. Solar energy is categorized as one of the best renewable energy since it does not emit carbon dioxide and because of unlimited supports from the sun. In this paper, three main sections of solar technologies like photovoltaicsolar panel, concentrating solar power, heating and cooling system that is available present days have been investigated. In the second part of this research, an experiment has been carried out to evaluate the effects of colors of light on the performance of solar photovoltaic panels. Different colors of light having different wavelength, resulting in different frequency and hence different energy. In general, the solar spectrum influences the performance of the solar panels. The results show that the solar panels are influenced more by the red color of light. This report will start by detailing the three main solar technologies, followed by the testing on the colors of light with the solar panels

Experimental analysis on the impacts of soil deposition and bird droppings on the thermal performance of photovoltaic panels

A Hybrid Electric and Thermal Solar Receiver

Solar photovoltaic (PV) systems is a promising method of generating electrical power from renewable energy in Malaysia. However, light obstruction on the solar panel due to dust accumulation can significantly influence the performance and efficiency of the system, and thus can affect the cash flow of the system operators. Despite the problem, only little studies have been conducted on the nature of dust accumulation on solar PV panels. Many of the studies involved imitation of dust for in laboratory tests, which could not assess the actual phenomenon. The main objective of this work was to study the effect of dust accumulation on the performance of solar PV panel in Malaysia. This work would enable appropriate scheduling for cleaning of the panels. The study was conducted on real-time basis on a building's roof. Measurements of irradiation, power output and the corresponding mass of dust collected were performed on hourly, daily, weekly and monthly basis. It was found from the study that the system's performance could drop by about 6% annually. On the maintenance aspect, in order to sustain economical operation, the cleaning interval should be every two months for industrial-scale systems that produce a minimum of 100 MWh/day. The interval would be shorter (i.e. one month) for smaller systems (residential).

This study intends to better solar photovoltaic (PV) panel performance by employing anti-reflective coating and explore how dust affects solar panel effectiveness. Three equivalent solar PV panels were compared, having one of them being uncoated, the next one having a TiO2 nanomaterial coating, and the very last one having a SiO2 nanomaterial coating. PV panel surfaces are coated with superhydrophilicity TiO2 as well as superhydrophobic SiO2 nanomaterials using a cloth made of microfibers. With the aid of a photovoltaic (PV) analyser, the power output of each and every PV panel has been monitored during the month of November 2021. After one month of being exposed to the environment, the percentage improvement in efficiency for TiO2-coated panels was 7.66% and for SiO2 coated panels was 19.73% as compared to uncoated PV panels. Results demonstrate that SiO2 covered PV panels outperform the other two scenarios in terms of efficiency and power output. The frequency of photovoltaic panel washing is reduced by the application of coating. Different amounts of dust are evenly scattered on the surface of the PV panel in order to observe the effect of the dust. Additionally, as the amount of dust increases, the effectiveness of PV panels declines considerably. When 20g of dust is dispersed across the surface of a PV panel, its efficiency falls by 34.6 percent.

As an alternative source of energy people all over the world have started using renewable energy. Renewable energy are unlimited sources of energy and they are completely free of cost. The most popular renewable energy sources are solar energy, wind energy, tidal energy, geothermal energy, hydro energy, biomass energy. Among the renewable energy sources, solar energy is the cleanest source of energy. Solar photovoltaic panel absorbs solar energy and produces electricity. The output of a solar photovoltaic panel depends on some factors such as sunlight intensity, solar panel surface temperature, solar cell materials, and shade and so on. To make sure that solar panel absorbs maximum irradiance from sun a tracking system is required which help the panel move towards the sun in day time according to sun light. In addition to control the surface temperature of solar photovoltaic panel, a microcontroller based automatic cooling system is designed. When the surface temperature of the panel is above the optimum temperature then the output of the solar panel is decreasing, to control the surface temperature an automatic cooling system will start and decrease the surface temperature of the solar panel consequence the performance is increasing. The main purpose of this work is to design and implement a microcontroller based automatic single axis solar tracking system with an automatic water-cooling system. These systems increase the output of the solar panel as well as rise the efficiency of the solar photovoltaic panel.

The power consumption rate is increasing daily, and people are greatly dependent on conventional energy sources. If it continues, the conventional energy sources will end very soon. So, it is the appropriate time to use renewable energy sources along with conventional energy sources. Solar energy is the cleanest and sustainable renewable energy source. By using a solar photovoltaic (PV) panel, solar power can be converted into electricity. The electricity production rate from a solar photovoltaic panel depends on some factors such as solar irradiance, solar cell materials, solar cell surface temperature, etc. When the solar cell captures more sunlight, the more power it produces. A fixed state solar panel can’t capture maximum sunlight during the sunlight hour because the sun’s position in the sky changes all day long. An automatic sunlight tracking system is required to ensure that the panel captures maximum solar irradiance. This research aims to design and implement a microcontroller-based automated single-axis solar tracking system to capture maximum sunlight and to extract maximum power from the solar PV panel in various sun positions. This system helps to face the solar panel towards the sunlight according to the sun’s movement in the sky. By using the tracking system, the panel can absorb a higher amount of solar power and increase the solar panel’s output power.

Photovoltaics literature survey (no. 182)

Solar photovoltaic (PV) panels are projected to become the largest contributor of clean electricity generation worldwide. Maintenance and cleaning strategies are crucial for optimizing solar PV operations, ensuring a satisfactory economic return of investment. Nanocoating may have potential for optimizing PV operations; however, there is insufficient scientific evidence that supports this idea. Therefore, this study aims to investigate the effectiveness of nanocoating on the performance of solar photovoltaic (PV) panels installed in Al Seeb, Oman. A further study was also carried out to observe the influence of coating layers on the performance of PV panels. One SiO2 nanocoated solar panel, another regularly cleaned PV panel, and a reference uncleaned panel were used to carry out the study. The site of the study was treeless and sandy, with a hot and dry climate. A data logger was connected to the solar PV panel and glass panel to record the resulting voltage, current, temperature, and solar radiation. It was observed that nanocoated PV panels outperformed both regular PV panels and uncleaned PV panels. Nanocoated PV panels demonstrated an average efficiency of 21.6%, showing a 31.7% improvement over uncleaned panels and a 9.6% improvement over regularly cleaned panels. Although nanocoating displayed high efficiency, regular cleaning also contributes positively. Furthermore, even though nanocoated PV panels outperformed the other two panels, it is important to note that the performance difference between the regular cleaned PV panels and the nanocoated PV panels was small. This indicates that regular cleaning strategies and nanocoating can further contribute to maintaining a more efficient solar PV system. Coating in many layers was also observed to influence the performance of PV panels insignificantly, mainly the fourth layer coating appeared to have formed sufficient mass to retain heat.

Evaluating How Demand Side Resources Affect the Environmental and Economic Performance of Energy Systems

Qatar is a country with huge potential for solar energy applications due to its reasonably high global horizontal radiation value. Further, solar energy can be used to reduce the demand on fossil-fuel generated electricity hence creating more revenues for Qatar from its natural gas resources. Currently, the residential sector consumes 57% of the total electricity consumption in Qatar. Moreover, Qatar has one of the highest electricity consumption per capita rates in the world; >15,000 kWh/year. Subsequently, at an individual level, the carbon footprint is high. It is important that we find cost effective ways to reduce dependence on fossil-fuel generated electricity as a step towards sustainable energy generation and use. Rooftop solar in the residential sector is identified a promising solution for Qatar to be sustainable in terms of energy use. The concept of using solar PV systems in homes is not a new one and has been applied in many countries. The private sector, in particular, has done a very good j...

Photovoltaic Solar systems have become attractive for powering autonomous systems and various devices. So far, the installation and usage of solar photovoltaic systems has been limited to either land or space. Lately, underwater solar photovoltaic power generation has attracted interest due to some of its unique application in powering underwater devices. The thermal control and cooling that result makes it more dependable for underwater devices. Around the equator, and some other parts of the world, some regions can be quite hot compromising a panel performance. A systematic study on the performance of stationary under water panel using normal tap water would provide information on the applicability of underwater panels in such places. In this work, a detailed study was carried out to determine the performance of 20W monocrystalline photovoltaic solar panels locally acquired and placed at various water depths. A locally purchased plastic translucent water tank was filled with normal tap water and the panels placed in the water at various depths. Solar irradiance, ambient and panel temperature were obtained using a solar 02 device and an irradiance power meter which were connected to a solar current-voltage (I-V) analyzer. Data was collected at 30-minute intervals between 11:00 a.m. and 3:00 p.m. East African Time (EAT) for panels at different depths up to 0.6m. The results revealed that as the water depth increased form 0 m to 0.6m, the panel temperature reduced by 15.48% (at a rate of 0.062 °C/cm), ambient temperature decreased by 5.13%, solar irradiance decreased by 63.79% while power output decreased by 75.00 %. It was noted that the submerged photovoltaic panels reduced the cleaning problem and power loss caused by high temperature. However, positioning the panels deep reduces the power production due to decreased irradiance which has a strong effect on the photocurrent and hence the power production of the panel. It is therefore advisable to keep the panels just below the water surface to maximize power production. The set up can be applied in very hot places for better power production.