Seasonal Variability in Optical Properties of Photovoltaic Module due to Dust Deposition: A Case Study in IIEST, Shibpur

Abstract. The development and validation of remote-sensing-based approaches for the retrieval of chromophoric dissolved organic matter (CDOM) concentrations requires a comprehensive understanding of the sources and magnitude of variability in the optical properties of dissolved material within lakes. In this study, spatial and seasonal variability in concentration and composition of CDOM and the origin of its variation was studied in Lake Balaton (Hungary), a large temperate shallow lake in central Europe. In addition, we investigated the effect of photobleaching on the optical properties of CDOM through in-lake incubation experiments. There was marked variability throughout the year in CDOM absorption in Lake Balaton (aCDOM(440) = 0. 06–9.01 m−1). The highest values were consistently observed at the mouth of the main inflow (Zala River), which drains humic-rich material from the adjoining Kis-Balaton wetland, but CDOM absorption decreased rapidly towards the east where it was consistently lower and less variable than in the westernmost lake basins. The spectral slope parameter for the interval of 350–500 nm (SCDOM(350–500)) was more variable with increasing distance from the inflow (observed range 0.0161–0.0181 nm−1 for the mouth of the main inflow and 0.0158–0.0300 nm−1 for waters closer to the outflow). However, spatial variation in SCDOM was more constant exhibiting a negative correlation with aCDOM(440). Dissolved organic carbon (DOC) was strongly positively correlated with aCDOM(440) and followed a similar seasonal trend but it demonstrated more variability than either aCDOM or SCDOM with distance through the system. Photobleaching resulting from a 7-day exposure to natural solar UV radiation resulted in a marked decrease in allochthonous CDOM absorption (7.04 to 3.36 m−1, 42 % decrease). Photodegradation also resulted in an increase in the spectral slope coefficient of dissolved material.

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Technogenic magnetic particles of topsoil from different sources of emission - A case study from upper silesian conurbation, Poland

MATEC Web of Conferences ◽

10.1051/matecconf/201824700051 ◽

2018 ◽

Vol 247 ◽

pp. 00051

Author(s):

Maria Magdalena Szuszkiewicz ◽

Adam Łukasik ◽

Tadeusz Magiera ◽

Marcin Szuszkiewicz

Keyword(s):

Magnetic Particles ◽

Potentially Toxic Elements ◽

Dust Deposition ◽

Thermomagnetic Analysis ◽

Magnetic Components ◽

Forest Sites ◽

Geochemical Elements ◽

Different Sources ◽

Technogenic Magnetic Particles

Studies on the effects of dust deposition on soils in urban-industrial areas were conducted with application of magnetic (soil magnetometry, thermomagnetic analysis) and geochemical (elements content) methods. The study area covers three different forest sites on Upper Silesian Conurbation. The purpose of the research was an estimation of soil pollution and characteristic of air derived particles. Results show magnetite and maghemite as dominant magnetic components of analyzed soil samples. The highest volume magnetic susceptibility (κ) and no correlation with potentially toxic elements (PTEs) were stated close to metallurgical plant whilst the highest correlation coefficient between κ and PTEs was stated in samples from the urban area and in a vicinity of coking plant.

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Identifying the seasonal variability in source of groundwater salinization using deuterium excess- a case study from Mewat, Haryana, India

Journal of Hydrology Regional Studies ◽

10.1016/j.ejrh.2020.100724 ◽

2020 ◽

Vol 31 ◽

pp. 100724 ◽

Cited By ~ 3

Author(s):

G. Krishan ◽

G. Prasad ◽

Anjali ◽

C.P. Kumar ◽

N. Patidar ◽

...

Keyword(s):

Seasonal Variability ◽

Deuterium Excess ◽

Groundwater Salinization

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

Thermal Science ◽

10.2298/tsci140515046a ◽

2017 ◽

Vol 21 (2) ◽

pp. 915-923 ◽

Cited By ~ 13

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.

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