The role of EVA encapsulation in the degradation of wafer based PV modules

This paper investigates the effects of ethylene vinyl acetate (EVA) encapsulation on PV module ageing and how crosslinking degree of encapsulation influences module durability under damp-heat (DH) and thermal cycle (TC) stresses. Results show that the high crosslinking samples favoured TC stresses,...

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Main Authors: Jiang Zhu, Daniel Montiel-Chicharro, Michael Owen-Bellini, Tom Betts, Ralph Gottschalg
Format: Default Conference proceeding
Published: 2016
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Online Access:https://hdl.handle.net/2134/32502
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spelling rr-article-95573302016-01-01T00:00:00Z The role of EVA encapsulation in the degradation of wafer based PV modules Jiang Zhu (1253214) Daniel Montiel-Chicharro (7208729) Michael Owen-Bellini (7203038) Tom Betts (1258395) Ralph Gottschalg (1247661) Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified This paper investigates the effects of ethylene vinyl acetate (EVA) encapsulation on PV module ageing and how crosslinking degree of encapsulation influences module durability under damp-heat (DH) and thermal cycle (TC) stresses. Results show that the high crosslinking samples favoured TC stresses, while the low crosslinking samples performed better under DH stresses. The primary mechanism of DH-induced degradation is series resistance (RS) increase and parallel resistance (RP) decrease due to moisture ingress and grid/contact corrosion. Comparison analysis of the result indicates that the lower cross-linked EVA appeared to be able to accommodate a smaller amount of the generated acetic acid and thus resulted in a lower corrosion rate. The primary effect of TC is to impose thermal expansion/compression on device. The EVA with lower crosslinking degree is less compact and the freedom of motion of EVA macromolecules is higher, which appeared to be less resistant to the effect of expansion/compression 2016-01-01T00:00:00Z Text Conference contribution 2134/32502 https://figshare.com/articles/conference_contribution/The_role_of_EVA_encapsulation_in_the_degradation_of_wafer_based_PV_modules/9557330 CC BY-NC-ND 4.0
institution Loughborough University
collection Figshare
topic Mechanical engineering not elsewhere classified
untagged
Mechanical Engineering not elsewhere classified
spellingShingle Mechanical engineering not elsewhere classified
untagged
Mechanical Engineering not elsewhere classified
Jiang Zhu
Daniel Montiel-Chicharro
Michael Owen-Bellini
Tom Betts
Ralph Gottschalg
The role of EVA encapsulation in the degradation of wafer based PV modules
description This paper investigates the effects of ethylene vinyl acetate (EVA) encapsulation on PV module ageing and how crosslinking degree of encapsulation influences module durability under damp-heat (DH) and thermal cycle (TC) stresses. Results show that the high crosslinking samples favoured TC stresses, while the low crosslinking samples performed better under DH stresses. The primary mechanism of DH-induced degradation is series resistance (RS) increase and parallel resistance (RP) decrease due to moisture ingress and grid/contact corrosion. Comparison analysis of the result indicates that the lower cross-linked EVA appeared to be able to accommodate a smaller amount of the generated acetic acid and thus resulted in a lower corrosion rate. The primary effect of TC is to impose thermal expansion/compression on device. The EVA with lower crosslinking degree is less compact and the freedom of motion of EVA macromolecules is higher, which appeared to be less resistant to the effect of expansion/compression
format Default
Conference proceeding
author Jiang Zhu
Daniel Montiel-Chicharro
Michael Owen-Bellini
Tom Betts
Ralph Gottschalg
author_facet Jiang Zhu
Daniel Montiel-Chicharro
Michael Owen-Bellini
Tom Betts
Ralph Gottschalg
author_sort Jiang Zhu (1253214)
title The role of EVA encapsulation in the degradation of wafer based PV modules
title_short The role of EVA encapsulation in the degradation of wafer based PV modules
title_full The role of EVA encapsulation in the degradation of wafer based PV modules
title_fullStr The role of EVA encapsulation in the degradation of wafer based PV modules
title_full_unstemmed The role of EVA encapsulation in the degradation of wafer based PV modules
title_sort role of eva encapsulation in the degradation of wafer based pv modules
publishDate 2016
url https://hdl.handle.net/2134/32502
_version_ 1794747800334893056