Prototype semi-transparent photovoltaic modules for greenhouse roof applications
| Autor: | Josuke Nakata, Akira Yano, Mahiro Onoe |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
Engineering
Renewable energy business.industry Photovoltaic system Solar cell Environmental engineering Greenhouse Soil Science Plant law.invention Electricity generation law Control and Systems Engineering Spherical Shading Animal Science and Zoology Cover material Crystalline silicon business Roof Agronomy and Crop Science Efficient energy use Food Science |
| Zdroj: | Biosystems Engineering. :62-73 |
| ISSN: | 1537-5110 |
| DOI: | 10.1016/j.biosystemseng.2014.04.003 |
| Popis: | Improved energy efficiency and the increased use of renewable energy are important objectives for sustainable greenhouse crop production. Two prototypes of semi-transparent-bifacial photovoltaic modules intended for greenhouse roof applications were developed. A module (PV1) using 1500 spherical solar microcells (1.8 mm diameter, crystalline silicon) with 15.4 cells cm−2 density in 108 mm × 90 mm area was produced. Thirty-nine percent of the area was covered with the cells. The remaining 61% was transparent to allow the most sunlight to enter the greenhouse for promising plant photosynthesis. Similarly, a module (PV2) was made using 500 cells with 5.1 cells cm−2 density. Thirteen percent of the area of this module was covered with the cells. The peak power output was 540 mW when the PV1 module was irradiated with 1213 W m−2 sunlight coming directly from the sky and via ground reflection. The peak power output was 202 mW when the PV2 module was irradiated with 1223 W m−2 sunlight. The conversion efficiencies from sunlight energy irradiated on the 108 mm × 90 mm area into electrical energy were 4.5% for the PV1 module and 1.6% for the PV2 module. Calculations of the annual electrical energy production per unit greenhouse land area indicated that these modules are potentially suitable for greenhouses in high-irradiation regions where electricity production could be high and winter demand low. |
| Databáze: | OpenAIRE |
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