Modelling of Energy Storage System from Photoelectric Conversion in a Phase Change Battery

Anna Karbowniczak, Hubert Latała, Krzysztof Nęcka, Sławomir Kurpaska and Leszek Książek
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Anna Karbowniczak: Faculty of Production and Power Engineering, University of Agriculture in Krakow, 30-149 Krakow, Poland
Hubert Latała: Faculty of Production and Power Engineering, University of Agriculture in Krakow, 30-149 Krakow, Poland
Krzysztof Nęcka: Faculty of Production and Power Engineering, University of Agriculture in Krakow, 30-149 Krakow, Poland
Sławomir Kurpaska: Faculty of Production and Power Engineering, University of Agriculture in Krakow, 30-149 Krakow, Poland
Leszek Książek: Faculty of Environmental Engineering and Land Surveying, University of Agriculture in Krakow, 30-059 Krakow, Poland

Energies, 2022, vol. 15, issue 3, 1-22

Abstract: The essence of the research was to model the actual energy storage system obtained from photoelectric conversion in a phase change accumulator operating in a foil tunnel. The scope of the work covered the construction of four partial models, i.e., electricity yield from solar radiation conversion for three types of photovoltaic cells (mono- and polycrystalline and CIGS), energy storage in a PCM battery, heat losses in a PCM battery and energy collection from photoelectric conversion in PCM battery. Their construction was based on modelling methods selected on the basis of literature review and previous analyses, i.e., artificial neural networks (ANN), random forest (RF), enhanced regression trees (BRT), MARSplines (MARS), standard multiple regression (SMR), standard C&RT regression trees (CRT), exhaustive CHAID for regression (CHAID). Based on the analysis of the error values (APE, MAPE, ΔESR t ), the best quality models were selected and used in the further part of the work. Based on the developed models, a simulation of the influence of the size of the photovoltaic power plant and the type of cells on the process of storing energy from photoelectric conversion in a PCM battery was carried out. For the battery under study, a PV power output of 9 kWp for mono and polycrystalline panels and 13 kWp for CIGS panels is recommended for reasons of energy storage efficiency. The obtained results made it possible to develop a model determining the amount of energy stored in a phase change battery depending on the power of a photovoltaic power plant and variable solar conditions. In order to store the greatest amount of energy, we should choose a source with a capacity to produce at least 70 kWh of electricity per day. In the final stage of the work, the indicators of solar radiation energy storage in the tested phase change accumulator were determined. For the battery tested, the solar energy storage efficiency can reach 12–13% for mono and polycrystalline panels and less than 7% for CIGS panels.

Keywords: energy storage system; photoelectric conversion modelling; phase-change battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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