Abstract

Bifacial photovoltaic (PV) modules can take advantage of rear-surface irradiance, enabling them to produce more energy compared with monofacial PV modules. However, the performance of bifacial PV modules depends on the irradiance at the rear side, which is strongly affected by the installation setup and environmental conditions. In this study, we experiment with a bifacial PV module and a bifacial PV system by varying the size of the reflective material, vertical installation, temperature mismatch, and concentration of particulate matter (PM), using three testbeds. From our analyses, we found that the specific yield increased by 1.6% when the reflective material size doubled. When the PV module was installed vertically, the reduction of power due to the shadow effect occurred, and thus the maximum current was 14.3% lower than the short-circuit current. We also observed a maximum average surface temperature mismatch of 2.19 °C depending on the position of the modules when they were composed in a row. Finally, in clear sky conditions, when the concentration of PM 10 changed by 100 µg/m3, the bifacial gain increased by 4%. In overcast conditions, when the concentration of PM 10 changed by 100 µg/m3, the bifacial gain decreased by 0.9%.

Highlights

  • Nowadays, the market for bifacial photovoltaic (PV) modules and its applications is rapidly increasing

  • At Testbed 1, we evaluated the power performance of the bifacial PV module based on the size of the reflective material under the module

  • 1.2 we confirmed that an increase in the size increased the performance 1 of the bifacial PV module

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Summary

Introduction

The market for bifacial photovoltaic (PV) modules and its applications is rapidly increasing. Previous studies have analyzed the simulated output performance, including the albedo, of bifacial modules based on the parameters of the installation setup, such as the tilt angle and height [9,10,11,12,13,14]. These simulated output performances were analyzed based on latitude and region, which affect environmental conditions [13,14]. We collected the data using an on-site measurement and monitoring system

Installation Conditions
Installation
Measurement Equipment
Measurement
Specific
10 Voltage
Measured
Mismatch in Module average
Shadow
Effects of Particle Pollution
Overcast
Bifacial gaingain based ononthe
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