A research group including scientists from the American National Institute of Standards and Technology (NIST), Underwriter’s Laboratories Inc. And the National Renewable Energy Laboratory (NREL) has outlined a new protocol for assessing PV module Achterbraak breakdown in the field. Through the proposed framework, the researchers analyzed PV -rear breakdown at 41 locations, with exposure times ranging from 1 to 38 years.
A group of researchers led by the Western Reserve University Case in the United States has developed a field research protocol for the monitoring of PV -module rider shoes.
“We have performed the protocol on the ground mounted on the ground and on the roof. It is suitable for both,” said the corresponding author of the research, Laura S. Bruckman, said PV -Magazine. “It can also be used by non-professional workforce.”
The protocol is intended as a cheap standardized guide for research groups that conduct surveys at PV locations. “The colorimeter that we used is relatively cheap and can be used to check the PV systems,” said Bruckman. “Often Handheld Fourier Transform Infrared (FTIR) Spectroscopy instruments are more expensive.”
The protocol uses the Köppen Geiger Climatic Zone (KGCZ) classification as the estimated indicator of local climates. It offers a uniform data structure and naming convention for measurements of the sites investigated, while standardology and assets standardize.
Eight different types of rear layer -layer -materials were considered: poly (vinylidene fluoride) (PvdF); Acrylic PvdF; Poly (tetrluorethylene-co-hexafluoropylene-co-vinylideen fluoride) (THV); Poly (vinyl fluoride) (PVF); poly (ethylene tereftalate) (cap); Fluoroethylene Vinyl ether (Feve); polyethylene naphthalate (pen); And glass.
Via the proposed protocol, the PV research team analyzed at 41 locations, with exposure times ranging from 1 to 38 years. The research showed that demolition of the back schedule has a “non-uniform” spatial and temporary distribution, whereby increased edge breakdown is observed for all materials and climate zones.
“Rand modules experience the combined effect of elevated junction box temperature and the ‘edge effect’ and therefore had a less significant difference than the middle modules,” explained the scientists, and noted that the anisotropy that they have detected in edge modules are dominated by the elevated reasons of the reasons of the reasons of the reasons of the reasons in the reasons in the reasons of the reasons in the reasons of the reasons in the rear of the reasons. councils.
They also explained that the demolition speeds can vary within different parts of the same location, block, row, sub-row or module, depending on the local microclimate around the material.
“We have observed a non-uniform degradation in the field, which emphasizes the need for detailed, localized analysis and a limitation of lab-accelerated aging,” they added. “In addition, comparing the behavior of materials in different climate zones revealed inconsistent trends, suggesting that macro climate only provides insufficient weather information for an extensive back-lintel breakdown analysis.”
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