Abstract
Conventional photovoltaic (PV) modules (exclude interdigitated back contact modules) with silicon or gallium arsenide PV cells often have significant inactive module surface area. This results from wafer cutting techniques and metal contacts that reduce the module’s collection area and the resultant power conversion efficiency. A holographic light collector (HLC) combining a low-cost holographic optical element and a diffuser into conventional PV modules is proposed and evaluated to collect the solar illumination over the inactive module area. The angular tolerance and extra annual energy yield (EY) of the HLC are analyzed. It is found that improvements in EY of 4.5%, 4.1%, and 3.8% can be obtained when PV panels are deployed with two-axis tracking systems, single-axis tracking systems, and without tracking systems, respectively.
Highlights
During the past several decades, photovoltaic (PV) solar energy conversion has played an increasingly important role as a renewable energy source.[1]
The results show that 53% of the illumination falling onto the inactive module surface area (IMSA) can be collected and converted into extra electricity when two-axis tracking systems are deployed together with the PV systems
In order to verify some of the simulation results, experimental reflection holograms were formed in a commercial photopolymer recording material (Covestro HF200)
Summary
During the past several decades, photovoltaic (PV) solar energy conversion has played an increasingly important role as a renewable energy source.[1]. Lightweight, and low-cost methods, holographic solar concentration techniques such as holographic lens, planar holographic concentrator, and spectrum splitting have shown significant potential in increasing the EY of PV systems.[7,8,9,10,11,12,13,14,15,16]
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