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Cleaning methods for dust deposited on the front cover of photovoltaic module

Rudnicka Małgorzata, Klugmann-Radziemska Ewa

Ecological Chemistry and Engineering. S

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2023

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Vol. 30, nr 4

505--516

EN

Photovoltaic modules are one of the renewable energy sources with great potential for application in various regions of the world as well as for different terrain. They are, however, sensitive to external factors, affecting the overall amount of energy generated, such as solar irradiance, shading effects and any form of soil build-up on the front glass cover of solar device. The latter issue happens over a course of weeks, months and years and the exact pace is determined for a specific location. Nevertheless, dust remaining on the module surface limits the amount of solar irradiation that can reach solar cells. It then leads to a lowered maximum power and correspond to a decrease in energy yield. A way to mitigate soiling effect, outside of natural washing dependent on precipitation, is a regular debris removal. The proposed methods utilise different approaches, namely active cleaning such as manual, mechanical or electrodynamic, or passive cleaning by applying additional hydrophobic or hydrophilic coating to slow down the accumulation tempo.

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Consequences of suboptimal design of building integrated photovoltaic installation – a case study for Gdansk, Polan

Rudnicka Małgorzata, Klugmann-Radziemska Ewa

Przegląd Elektrotechniczny

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2022

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R. 98, nr 9

213--215

EN

The carried out analysis concerns 2 kWp building integrated photovoltaic installation (BIPV) at the Chemistry Faculty of Gdansk University of Technology. It was proven that the generated energy data for every month diverge significantly from the expected vales. It is corelated with suboptimal orientation of the installation itself, as well as with the tilt angle varying from optimal.

PL

Przeprowadzona analiza dotyczyła uzysków energetycznych 2 kWp instalacji fotowoltaicznej zintegrowanej z budynkiem (BIPV) Wydziału Chemicznego Politechniki Gdańskiej. Wykazano, iż dla każdego miesiąca otrzymane wartości generowanej energii wyraźnie odbiegają od spodziewanych. Jest to skorelowane z nieoptymalną orientacją samej instalacji, jak również kątem nachylenia obiegającym od optymalnego.

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The issue of shading photovoltaic installation caused by dust accumulation on the glass surface

Rudnicka Małgorzata, Klugmann-Radziemska Ewa

Ecological Chemistry and Engineering. S

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2021

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Vol. 28, nr 2

173--182

EN

The issue of accumulation of dust and other pollutants on the surface of photovoltaic modules was thoroughly analysed over the years. One of the first surveys in this field of knowledge linked pollutant accumulation on the module surface with transmittance loss of its glass covering, which leads to lessened amount of solar radiation reaching solar cells. First stage of this accumulation process is linear transparency loss, and second stage - molecule agglomeration and settlement some grains on the already existing layer of dust. Additionally, the pace of working parameters reduction for photovoltaic installation is influenced by the type of dust itself. Molecules with smaller grains cover the surface much more densely, therefore limiting the amount of light passing though the top glass layer far more than molecules with bigger grains. The aim of the carried out study was to find the relationship between dust surface density and change in electrical parameters. Such approach makes it possible to compare electrical and physical parameters of different photovoltaic modules. Additionally, glass coverage itself was noted to have a significant impact on the overall decrease in working parameters of PV modules.

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Energy yield generated by a small building integrated photovoltaic installation

Klugmann-Radziemska Ewa, Rudnicka Małgorzata

Ecological Chemistry and Engineering. S

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2020

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Vol. 27, nr 3

335--346

EN

In the recent years photovoltaic (PV) industry has experienced a major growth, caused by the ever present annual decrease in module production prices and the expanding awareness of the general public in terms of renewable energy. There are numerous ways to implement PV modules as an additional energy source for a building, be it mounted on the rooftop, or building integrated (BIPV). An analysis of BIPV consisting of 8 modules with the power of 250 Wp each was carried out for the building of the Chemistry Faculty of Gdansk University of Technology (GUT). It included monthly irradiance and energy generation values and compared them to data obtained by the means of PV-GIS system, after inserting site specific coordinates. Additional research on the same type of a single module with the power of 270 Wp was conducted to provide more insight in this matter. A comprehensible analysis allows for defining a final conclusion for the decrease in energy yield for GUT BIPV installation. Data outputs are lower than expected based on PV-GIS values, as for the most time the facade mounted PV system experiences partial soft shading from the nearby park. Furthermore, it is not located directly facing south, but rather south-east which does not prompt ideal working conditions.