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http://hdl.handle.net/1942/31810
Title: | Impact of photovoltaic technology and feeder voltage level on the efficiency of façade building-integrated photovoltaic systems | Authors: | Ravyts, Simon Moschner, Jens D. Yordanov, Georgi H. Van den Broeck, Giel Dalla Vecchia, Mauricio Manganiello, Patrizio MEURIS, Marc Driesen, Johan |
Issue Date: | 2020 | Publisher: | ELSEVIER SCI LTD | Source: | APPLIED ENERGY, 269 (Art N° UNSP 115039) | Abstract: | Facade building-integrated photovoltaics is a technology that transforms a passive facade into a distributed, renewable electrical generator by the inclusion of solar cells in the building envelope. Partial shading due to nearby objects is a typical problem for facade building-integrated photovoltaics as it strongly reduces the output power of the installation. Distributed maximum power point tracking by means of embedded converters and a common direct current bus has been proposed to alleviate this issue. However, the bus voltage plays an important role in converter topology selection and overall efficiency, although this is not being covered in literature. Also the influence of the solar cell technology on the output voltage of the module is not studied before, although it strongly influences the converter topology selection and the losses. In this paper, a methodology is described to investigate the influence of the voltage level and solar cell technology by taking conversion losses in the converters and the cabling into account. The methodology is applied to two case study buildings for which four different cell technologies are considered. It is shown that overall high efficiencies are obtained, regardless of the voltage level. However, the loss distribution changes significantly with the voltage. This aspect can be used advantageously to reduce thermal stresses on the embedded converter. Furthermore, the overall system efficiency is typically higher when the voltage step-up is lower. | Notes: | Ravyts, S (corresponding author), Katholieke Univ Leuven, Div ELECTA, Dept Elect Engn ESAT, Kasteelpk Arenberg 10, B-3001 Leuven, Belgium.; Ravyts, S (corresponding author), EnergyVille, Thorpk 8310 & 8320, B-3600 Genk, Belgium. simon.ravyts@kuleuven.be |
Other: | Ravyts, S (corresponding author), Katholieke Univ Leuven, Div ELECTA, Dept Elect Engn ESAT, Kasteelpk Arenberg 10, B-3001 Leuven, Belgium; EnergyVille, Thorpk 8310 & 8320, B-3600 Genk, Belgium. simon.ravyts@kuleuven.be | Keywords: | BIPV;DC/DC converters;MLC;LVDC | Document URI: | http://hdl.handle.net/1942/31810 | ISSN: | 0306-2619 | e-ISSN: | 1872-9118 | DOI: | 10.1016/j.apenergy.2020.115039 | ISI #: | WOS:000537619800031 | Rights: | 2020 Elsevier Ltd. All rights reserved. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2021 |
Appears in Collections: | Research publications |
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Ravyts_Simon_2020.pdf Restricted Access | Published version | 2.71 MB | Adobe PDF | View/Open Request a copy |
BIPV_VDC.pdf | Non Peer-reviewed author version | 2.62 MB | Adobe PDF | View/Open |
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