Reduced output of photovoltaic modules due to different types of dust particles

2021 ◽  
Vol 280 ◽  
pp. 124317
Author(s):  
Zeki Ahmed Darwish ◽  
Kamaruzzaman Sopian ◽  
Ahmad Fudholi
Keyword(s):  
Dust Particles ◽  
Photovoltaic Modules ◽  
Different Types

scholarly journals Effect of dust deposition on the performance of photovoltaic modules in Taxila, Pakistan

2017 ◽  
Vol 21 (2) ◽  
pp. 915-923 ◽  
Author(s):  
Hafiz Ali ◽  
Muhammad Zafar ◽  
Muhammad Bashir ◽  
Muhammad Nasir ◽  
Muzaffar Ali ◽  
...  
Keyword(s):  
Output Power ◽  
Photovoltaic Module ◽  
Strong Impact ◽  
Dust Deposition ◽  
Average Output ◽  
Photovoltaic Modules ◽  
Time Period ◽  
Different Types ◽  
The Difference ◽  
Module Efficiency

The air borne dust deposited on the surface of photovoltaic module influence the transmittance of solar radiations from the photovoltaic modules glazing surface. This experimental work aimed to investigate the effect of dust deposited on the surface of two different types of photovoltaic modules (monocrystalline silicon and polycrystalline silicon). Two modules of each type were used and one module from each pair was left exposed to natural atmosphere for three months of winter in Taxila, Pakistan. Systematic series of measurements were conducted for the time period of three months corresponding to the different dust densities. The difference between the output parameters of clean and dirty modules provided the information of percentage loss at different dust densities. The dust density deposited on the modules surface was 0.9867 mg/cm2 at the end of the study. The results showed that dust deposition has strong impact on the performance of photovoltaic modules. The monocrystalline and polycrystalline modules showed about 20% and 16% decrease of average output power, respectively, compared to the clean modules of same type. It was found that the reduction of module efficiency (?clean ? ?dirtv) in case of monocrystalline and polycrystalline module was 3.55% and 3.01%, respectively. Moreover the loss of output power and module efficiency in monocrystalline module was more compared to the polycrystalline module.

scholarly journals Long-lasting strong electrostatic attraction and adhesion forces of dust particles on photovoltaic modules

2020 ◽  
Vol 204 ◽  
pp. 110206 ◽  
Author(s):  
C.-S. Jiang ◽  
H.R. Moutinho ◽  
B. To ◽  
C. Xiao ◽  
L.J. Simpson ◽  
...  
Keyword(s):  
Electrostatic Attraction ◽  
Dust Particles ◽  
Adhesion Forces ◽  
Photovoltaic Modules

Development of a prototype dry decontamination method for particulate contamination: The DryCon system

2020 ◽  
Vol 15 (4) ◽  
pp. 261-273
Author(s):  
Barbara M. Alexander, PhD, PE, CIH ◽  
H. Amy Feng, MS ◽  
Gabriel Merk, BS
Keyword(s):  
Healthcare Providers ◽  
Field Research ◽  
Cold Weather ◽  
Dust Particles ◽  
Respiratory Protection ◽  
Particulate Contamination ◽  
Air Jets ◽  
Industrial Setting ◽  
Real World Applications ◽  
Different Types

Objective: This article describes the development of a prototype dry decontamination system (DryCon) for use in the event of a contamination incident involving a particulate contaminant. Disrobing and showering is currently recommended almost exclusively in mass decontamination, although it may not be feasible when water is scarce, in cold weather environments, or when there may be compliance issues with the requirement to disrobe, ie, unwillingness to disrobe. During disrobing, dust particles could also re-aerosolize, leading to inhalation of contaminants.Design: The DryCon prototype uses air jets for dry decontamination. The system is portable and can run on building-supplied 220-V power or generator power. Multiple contaminated persons can be treated rapidly, one after the other, using this system.Setting: We tested DryCon in a controlled environment, using a manikin and three different types of fabric squares to investigate its effectiveness, with a decontamination time of 60 seconds.Main outcome: At the higher airflow tested, ie, 90 percent of full blower speed or approximately 540 cfm (15 m3/minute), mean decontamination efficiencies of 56.8 percent, 70.3 percent, and 80.7 percent were measured for firefighter (FF) turnout fabric, cotton denim, and polyester double knit fabric, respectively.Results: Removal of this easily re-aerosolized fraction of the contaminants helps protect contaminated people, as well as healthcare providers they come in contact with, from the potential risk of further inhalation exposures from the re-aerosolization caused by doffing clothing.Conclusion: The results demonstrate the promise of the DryCon system for use where water is not available, as a first step prior to wet decontamination, or in an industrial setting for post-work-shift decontamination. Further lab and field research will be necessary to prove the effectiveness of this technique in real-world applications and to determine if respiratory protection or other personal protective equipment (PPE) is needed during use of the DryCon system.

Efficiency of Tungsten Dust Collection of Different Types of Dust Particles by Electrostatic Probe

2017 ◽  
Vol 80 (11) ◽  
pp. 1642-1646 ◽  
Author(s):  
L. B. Begrambekov ◽  
A. N. Voityuk ◽  
A. M. Zakharov ◽  
O. A. Bidlevich ◽  
E. A. Vechshev ◽  
...  
Keyword(s):  
Dust Particles ◽  
Dust Collection ◽  
Different Types ◽  
Electrostatic Probe

The Granularity of Dust Particles when Sanding Wood and Wood-Based Materials

2014 ◽  
Vol 1001 ◽  
pp. 432-437 ◽  
Author(s):  
Alena Očkajová ◽  
Ján Stebila ◽  
Marek Rybakowski ◽  
Tomasz Rogozinski ◽  
L'uboš Krišták ◽  
...  
Keyword(s):  
Particle Size ◽  
Granulometric Composition ◽  
Working Environment ◽  
Dust Particles ◽  
Safety Measures ◽  
Different Types ◽  
Sieve Analyses ◽  
Narrow Belt ◽  
Technical Safety

The article presents results of the granulometric composition of chip particles when sanding wood (beech) and wood-based materials (particleboard and semi-hardboard) using different types of sanders – wide belt sander, narrow belt sander, and hand sander. On the basis of the carried out sieve analyses, the proportion of produced particles, which can be marked as dust with the particle size of ≤ 80 μm, is high at the interval from 89.21% - 96.29 %. The highest percentage of dust particles was reached at dust from the hand disk sander. At the end of the article we point to possible technical safety measures – additional dust exhausting, suction, to possibly reduce the dust getting to the working environment.

scholarly journals Research on the potential-induced degradation (PID) of PV modules running in two typical climate regions

Clean Energy ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 222-226
Author(s):  
Gang Sun ◽  
Xiaohe Tu ◽  
Rui Wang
Keyword(s):  
Degradation Mechanism ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Climatic Conditions ◽  
Photovoltaic Modules ◽  
Significant Potential ◽  
Significant Difference ◽  
Pv Modules ◽  
Different Types

Abstract In order to accurately select photovoltaic modules under different climatic conditions, three kinds of polycrystalline silicon photovoltaic modules were prepared for this study using different properties of packaging materials and two typical climatic zones of China were selected for installation and operation of these photovoltaic (PV) modules. The photoelectric parameters (maximum power, open-circuit voltage, short-circuit current, etc.) and electroluminescence images of these modules were analysed before and after their operation for 6 months. The study found that the performance of PV modules in different climatic regions shows different decay tendency and degradation mechanism. There was a significant difference in the degradation of the three different types of PV modules in the sub-humid-hot region (Suzhou, Jiangsu); two kinds of photovoltaic modules using relatively poorly performing package materials showed significant potential-induced degradation effects. However, the degradation trend of the three different types of PV modules in the warm-temperate region (Kenli, Shandong) was consistent and no significant potential-induced degradation effect was observed.

An Introduction to Dynamic Load Test on Photovoltaic Modules

2017 ◽  
Vol 726 ◽  
pp. 13-17 ◽  
Author(s):  
Dong Wang ◽  
Chen Guang Wei
Keyword(s):  
Dynamic Loading ◽  
Dynamic Load ◽  
Load Test ◽  
Solar Photovoltaic ◽  
Front Cover ◽  
Photovoltaic Modules ◽  
Dynamic Load Test ◽  
Capacity Reduction ◽  
Pv Modules ◽  
Different Types

The front cover of solar photovoltaic modules is mostly made of 3.2mm, 2mm or thinner glass. When under wind or other dynamic loading stress, the performance of the PV modules might be affected. This article analyzed data of dynamic load test on several different types of PV modules, and got the conclusion that the dynamic load stress could harm the string ribbon or interior circuits of the PV modules, and would therefore lead to capacity reduction and less insulation.

Self-similar cylindrical expansion of impurity particles in a plasma

1994 ◽  
Vol 52 (3) ◽  
pp. 345-352 ◽  
Author(s):  
Ming Y. Yu ◽  
R. Bharuthram
Keyword(s):  
Cylindrical Geometry ◽  
The Self ◽  
Dust Particles ◽  
Charged Impurity ◽  
Physical Interest ◽  
Different Types ◽  
Fluid Theory ◽  
Self Similar ◽  
Similar Solutions

The radial self-similar expansion of negatively charged impurity or dust particles in a cylindrical geometry is investigated using the multi-fluid theory. Three different types of self-similar solutions are considered. Various asymptotic limits of physical interest in the self-similar space are shown to occur.

scholarly journals Performance investigation of photovoltaic modules by back surface water cooling

2018 ◽  
Vol 22 (6 Part A) ◽  
pp. 2401-2411 ◽  
Author(s):  
Muhammad Bashir ◽  
Hafiz Ali ◽  
Khuram Amber ◽  
Muhammad Bashir ◽  
Hassan Ali ◽  
...  
Keyword(s):  
Linear Trend ◽  
Temperature Drop ◽  
Back Surface ◽  
Photovoltaic Module ◽  
Water Cooling ◽  
Photovoltaic Modules ◽  
Photovoltaic Thermal System ◽  
Different Types ◽  
Useful Heat ◽  
Module Efficiency

The temperature of the photovoltaic module has an adverse effect on the performance of photovoltaic modules. The photovoltaic module converts a small portion of energy from solar radiations into electricity while the remaining energy wastes in the form of heat. In this study, water cooled photovoltaic/thermal system was analyzed to enhance the efficiency by absorbing the heat generated by the photovoltaic modules and allowing the photovoltaic module to work at comparatively low temperature. For this system, four photovoltaic modules of two different types were used. To investigate the cooling effect, two modules were modified by making ducts at their back surface having inlet and outlet manifolds for water-flow. The measurements were taken with cooling and without cooling of photovoltaic modules. The temperature was measured at inlet, outlet, and at different points at the back of photovoltaic modules. It was found that there was a linear trend between the module efficiency and temperature. The average module temperature of c-Si and p-Si modules without cooling was 13.6% and 7.2% lower, respectively, than the same modules without cooling. As a result of temperature drop, the average module electrical efficiency of c-Si and p-Si was 13% and 6.2% higher, respectively, compared to the modules without cooling. Flowing water also gains useful heat from photovoltaic module so the resultant overall energy of the system was much higher.

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