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Search Results (4)

Search Parameters:
Keywords = photovoltaic dust coefficient

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17 pages, 2158 KiB  
Article
Study on the Impact of Large-Scale Photovoltaic Systems on Key Surface Parameters in Desert Area Regions of Xinjiang, China
by Junxia Jiang, Huan Du, Huihui Yin and Hongbo Su
Energies 2025, 18(12), 3170; https://doi.org/10.3390/en18123170 - 17 Jun 2025
Viewed by 360
Abstract
This study evaluated the effects of photovoltaic (PV) arrays on critical surface parameters through analysis of observational data collected from a utility-scale PV power station located in Wujiaqu City, Xinjiang, in 2021. The results reveal that: (1) Installation of PV panels reduces surface [...] Read more.
This study evaluated the effects of photovoltaic (PV) arrays on critical surface parameters through analysis of observational data collected from a utility-scale PV power station located in Wujiaqu City, Xinjiang, in 2021. The results reveal that: (1) Installation of PV panels reduces surface albedo, which is significantly altered by dust storm conditions; (2) the installation of PV arrays increases the aerodynamic and thermal roughness length by increasing the frictional velocity across the mixed underlying surface; (3) the overall transport coefficients within the PV plant are higher than that of the reference site, with greater diurnal variation than nocturnal variation. The overall transport coefficient is highest in the unstable stratification conditions and lowest under stable stratification conditions; and (4) soil thermal property parameters exhibit seasonal variations. Significant changes in thermal conductivity and specific heat capacity were observed during spring thaw, high and fluctuating diffusivity in summer, and low and stable values in winter. The findings demonstrate that installing PV arrays in arid regions modifies surface energy balance and heat transfer characteristics. This provides a basis for optimizing PV station layouts and conducting climate impact assessments. Full article
(This article belongs to the Section A2: Solar Energy and Photovoltaic Systems)
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13 pages, 5502 KiB  
Article
Evaluation of a Dust-Related Power Loss Sensor for Solar Farm Management
by Barnaby Portelli, Ryan D’Amato, Ivan Grech and Joseph Micallef
Energies 2025, 18(5), 1141; https://doi.org/10.3390/en18051141 - 26 Feb 2025
Viewed by 700
Abstract
As the adoption of solar photovoltaic systems continues to increase, the efficiency and reliability of these systems under real-world conditions become paramount. This paper presents a comprehensive study on the influence of dust deposition on PV panel performance, based on an innovative dust-related [...] Read more.
As the adoption of solar photovoltaic systems continues to increase, the efficiency and reliability of these systems under real-world conditions become paramount. This paper presents a comprehensive study on the influence of dust deposition on PV panel performance, based on an innovative dust-related power loss sensor. A dust coefficient is defined, which gives the percentage loss in energy generation due to dust accumulation. This coefficient, obtained from the dust-related power loss sensor, was validated in this study in two ways: correlation with weather events monitored using data derived from a custom-built weather station and correlation with the outputs from an eight-panel reference system. Pairs of PV panels in this eight-panel system were subjected to four distinct cleaning schedules, and the energy generation from each pair was monitored. The results showed that the data from the dust-related power loss sensor system presented here are a reliable indicator of energy losses due to dust accumulation. The dust coefficient can thus be used as a real-time parameter that enables the creation of informed cost-effective cleaning schedules for large PV farms. Full article
(This article belongs to the Section A2: Solar Energy and Photovoltaic Systems)
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16 pages, 4100 KiB  
Article
Investigation of Geometric and Hardness Parameters of Tank Track Grooves Equipped on Photovoltaic Cleaning Robot
by Huy Hung Nguyen, Cong Toai Truong, Anh Duy Hoang Ngoc, Minh Tri Nguyen, Van Tu Duong and Tan Tien Nguyen
Appl. Sci. 2024, 14(1), 145; https://doi.org/10.3390/app14010145 - 22 Dec 2023
Viewed by 1679
Abstract
The utilization of photovoltaic (PV) cleaning robots has proven to be an effective method for maintaining the conversion efficiency of utility-scale PV power plants by mitigating the impact of dust accumulation. However, ensuring the safe operation of these robots, resembling tanks in appearance, [...] Read more.
The utilization of photovoltaic (PV) cleaning robots has proven to be an effective method for maintaining the conversion efficiency of utility-scale PV power plants by mitigating the impact of dust accumulation. However, ensuring the safe operation of these robots, resembling tanks in appearance, particularly in wet working conditions, relies heavily on their adherence to PV panels. This study focuses on assessing the slip resistance of candidate materials coated on endless polyurethane timing belts, which are equipped on PV cleaning robots to enable the efficient cleaning of uneven and misaligned PV arrays. A novel apparatus is proposed to evaluate the coefficient of static friction (COSF) of slip specimens, considering factors such as outsole patterns, area density, and shore hardness. The results highlight the significant influence of shore hardness and area density on the slip resistance of the specimens. Based on the findings, it is recommended to design track grooves with hexagon or zigzag patterns and maintain a low area density (e.g., 0.44 g·mm−2) to ensure the safe operation of PV cleaning robots, irrespective of the working conditions they encounter. By addressing the slip resistance challenge, this research contributes to the overall efficiency and reliability of PV cleaning robots, enhancing their performance in maintaining clean and optimal PV panel surfaces. Full article
(This article belongs to the Section Mechanical Engineering)
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13 pages, 3865 KiB  
Communication
Soiling of Photovoltaic Modules: Comparing between Two Distinct Locations within the Framework of Developing the Photovoltaic Soiling Index (PVSI)
by Thamer Alquthami and Karim Menoufi
Sustainability 2019, 11(17), 4697; https://doi.org/10.3390/su11174697 - 29 Aug 2019
Cited by 30 | Viewed by 4223
Abstract
This article evaluates the impact of dust accumulation on the performance of photovoltaic (PV) modules in two different locations inside Egypt, Cairo and Beni-Suef. Two identical PV modules were used for that purpose, where each module was exposed to the outdoor environment in [...] Read more.
This article evaluates the impact of dust accumulation on the performance of photovoltaic (PV) modules in two different locations inside Egypt, Cairo and Beni-Suef. Two identical PV modules were used for that purpose, where each module was exposed to the outdoor environment in order to collect dust naturally for a period of three weeks, each in its corresponding location. The approximate dust density on each of the two PV modules was estimated. Moreover, the electrical performance was evaluated and compared under the same indoor testing conditions. The results show a better electrical performance and less dust density for the PV module located in Cairo compared to that located in Beni-Suef. The results further provide an indication for the impact of soling in different locations within the same country through a clear and simple procedure. In addition, it paves the way for establishing a Photovoltaic Soiling Index (PVSI) in terms of a Photovoltaic Dust Coefficient, as well as a Photovoltaic Dust Interactive Map. The product of such concepts could be used by the Photovoltaic systems designers everywhere in order to estimate the impact of dust on the future performance of PV modules in small and large installations in different regions around the globe, and during different times of the year as well. Full article
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