Study on the cleaning and cooling of solar photovoltaic panels using compressed airflow

Li, Dacheng; King, Marcus; Dooner, Mark; Guo, Sheng; Wang, Jihong

doi:10.1016/j.solener.2021.04.050

Cited by 34 publications

(15 citation statements)

References 33 publications

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“…Γ is the wall coefficient, which can be set as 1.84. [16,29] R e = 2Γ (RV s /ν) 2 is the Reynolds. Introduced the parameter V m , it can be simplified as R e = 2R/νV m .…”

Section: Motion Criterion Of Dust On the Inclined Photovoltaic Panelsmentioning

confidence: 99%

“…[13][14][15] In recent years, a cooling and dust removal device for PV panels based on compressed air has attracted the attention of researchers, and the unique advantage of this method has been proved. [16] A scientific and comprehensive understanding of the forces acting on dust deposition and the scientific design of airflow velocity will be helpful for the practical design of this type of device. [17][18][19] As the development of PV technology, the power of a single PV panel continues to increase, and the intensity of the electric field generated around it becomes stronger.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in this paper, we will discuss the required airflow velocity of a dust removal device with compressed air under the influence of the electric field generated by the PV panel. Compared with the works proposed by previous literatures, [16,27] we introduced the electric field generate by PV panel and the particle electrification mechanism for the first time, so as to calculate the electrostatic force of deposited dust relatively more reasonably.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of photovoltaic panel electric field on the wind speed required for dust removal from the panels

Li,

Wang,

Liu

et al. 2023

Chinese Phys. B

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Methods to remove dust deposits by high-speed airflow have significant potential applications, with optimal design of flow velocity being the core technology. In this paper, we discuss the wind speed required for particle removal from photovoltaic (PV) panels by compressed air by analyzing the force exerted on the dust deposited on inclined photovoltaic panels, which also included different electrification mechanisms of dust while it is in contact with the PV panel. The results show that the effect of the particle charging mechanism in the electric field generated by the PV panel is greatly smaller than the effect of the Van der Waals force and gravity, but the effect of the particle charged by the contact electrification mechanism in the electrostatic field is very pronounced. The wind speed required for dust removal from the PV panel increases linearly with the PV panel electric field, so we suggest that the nighttime, when the PV electric field is relatively small, would be more appropriate time for dust removal. The above results are of great scientific importance for accurately grasping the dust distribution law and for achieving scientific removal of dust on PV panels.

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“…Γ is the wall coefficient, which can be set as 1.84. [16,29] R e = 2Γ (RV s /ν) 2 is the Reynolds. Introduced the parameter V m , it can be simplified as R e = 2R/νV m .…”

Section: Motion Criterion Of Dust On the Inclined Photovoltaic Panelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of photovoltaic panel electric field on the wind speed required for dust removal from the panels

Li,

Wang,

Liu

et al. 2023

Chinese Phys. B

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“…When dust is present on the surface of the panel, solar radiation is blocked from reaching the photodiodes so a reduction in electrical power output is observed. The cleaning model is adapted work presented for mathematically modelling the cleaning of solar PV panels from Li et al [23]. The modelling approach assumes that the air blows uniformly across the entire surface of the panel with all areas cleaned evenly and subject to the same air velocity.…”

Section: Pv Panel Cleaningmentioning

confidence: 99%

Mathematical Modelling of a System for Solar PV Efficiency Improvement Using Compressed Air for Panel Cleaning and Cooling

King

Dooner

et al. 2021

Energies

Self Cite

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The efficiency of solar photovoltaic (PV) panels is greatly reduced by panel soiling and high temperatures. A mechanism for eliminating both of these sources of inefficiencies is presented by integrating solar PV generation with a compressed air system. High-pressure air can be stored and used to blow over the surface of PV panels, removing present dust and cooling the panels, increasing output power. A full-system mathematical model of the proposed system is presented, comprised of compressed air generation and storage, panel temperature, panel cleaning, and PV power generation. Simulation results indicate the benefit of employing compressed air for cleaning and cooling solar PV panels. For a fixed volume of compressed air, it is advantageous to blow air over the panels early in the day if the panel is soiled or when solar radiation is most abundant with the highest achievable flow rate if the panel is clean. These strategies have been shown to achieve the greatest energy captures for a single PV panel. When comparing the energy for air compression to the energy gain from cleaning a single PV over a two-week period, an energy ROI of 23.8 is determined. The system has the potential to eliminate the requirement for additional manual cleaning of solar PV panels.

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“…Due to these reasons, it is necessary to look at some other alternative green sources for autonomous self-powered sensors. Although, harvesting electrical energy from the sun is a matured and well-accepted technique, [17][18][19] this technique has a limitation that it remains functional only in the presence of sunlight. Recently scientific explorations showed that plants may become a potential source of bioenergy that is not only renewable but also sustainable and cheap [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Plant Base Renewable Energy to Power Nanoscale Sensors

Singh¹

2023

Nanogenerators and Self-Powered Systems

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The modern technologies have been revolutionized due to tremendous progress in Internet-of-Things (IoT). Sensors are a core component to make a bridge between the Internet and surrounding environments. The progress in power efficient communication network makes it possible to deploy the sensors in remote areas. The major drawback of these sensors is that they use Li-ion battery for power supply, which needs frequent recharging/replacement due to massive number of connected devices to IoT. The hazardous chemicals left in environment after the use of battery is another concern. Since modern nanoscale sensors need only nanoscale power (of order of μWatt), nanogenerators can play an important role to provide self-powered sensors, which is growing technology that can harvest small-scale energy from piezo- and pyroelectric effect. However, this technique is lightweight but not cost-effective and biodegradable. We have proposed a green, sustainable energy harvesting system based on living plants because plants are the undisputed champion of solar power that operates at nearly 100% efficiency. Plant-based energy generation is a method that harvests electrical energy from living plants due to a chemical reaction between the plant and a pair of electrodes. This energy is available 24×7 day and night irrespective of environmental conditions.

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Study on the cleaning and cooling of solar photovoltaic panels using compressed airflow

Cited by 34 publications

References 33 publications

Effect of photovoltaic panel electric field on the wind speed required for dust removal from the panels

Effect of photovoltaic panel electric field on the wind speed required for dust removal from the panels

Mathematical Modelling of a System for Solar PV Efficiency Improvement Using Compressed Air for Panel Cleaning and Cooling

Plant Base Renewable Energy to Power Nanoscale Sensors

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