Abstract
Solar power has become a key green source of energy. An important factor that affects the reliability and lifetime of solar modules is the quality of encapsulation through the lamination process, which melts the ethylene vinyl acetate (EVA) to make the solar cells combine with the front glass side and the rear side units. The degree of crosslinking or curing degree for EVA sheets, when the EVA sheet gets heated, can affect the efficiency of the performance and power conversion of solar modules. For this reason, motivated by a lamination data, we construct here a statistical model for describing the relationship between the curing degree and the lamination factors (temperature and time). Then, based on some specification limits on the curing degree, the optimal lamination time for solar modules can be determined at different temperatures. Moreover, the optimal sample size allocation in a test for measuring EVA sheets can also be determined. A simulation study is finally carried out to show the closeness of simulation results to the asymptotic results.
Highlights
The energy crisis is of at most importance due to dwindling reserves of fossil fuels
Much literature exists on methods for determining the degree of crosslinking by Differential scanning calorimetry (DSC) and its applications (e.g., Bruckman et al [2]; Jaunich et al [7]; Ogier et al [11]); but, previous work has not dealt with optimal lamination time at different temperatures for the curing degree on ethylene vinyl acetate (EVA) in a natural way, and this provides the main motivation for the present article
We have developed here methods for the determination of optimal lamination time at different temperatures for the curing degree based on a location-scale family of distributions
Summary
The energy crisis is of at most importance due to dwindling reserves of fossil fuels. High lamination temperature or longer lamination time can increase the degree of crosslinking, resulting in EVA sheets becoming crisp, and failing to remain usual quality to protect the solar cell. Much literature exists on methods for determining the degree of crosslinking by DSC and its applications (e.g., Bruckman et al [2]; Jaunich et al [7]; Ogier et al [11]); but, previous work has not dealt with optimal lamination time at different temperatures for the curing degree on EVA in a natural way, and this provides the main motivation for the present article. Improvements on the determination of the curing degree for EVA sheets at different lamination times and temperatures by DSC method are presented here.
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