Testing organic photovoltaic modules for application as greenhouse cover or shading element

Maayan Friman Peretz, Farhad Geoola, Ibrahim Yehia, Shay Ozer, Asher Levi, Esther Magadley, Roman Brikman, Lavi Rosenfeld, Avi Levy, Murat Kacira, Meir Teitel

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

This study examines the feasibility of using semi-transparent, flexible organic photovoltaic (OPV) modules as greenhouse shading material. By using such modules, it may be possible to utilise existing greenhouse-based agricultural areas for electricity production. Using OPV modules to shade greenhouses and reduce excess solar energy may result in reduced heat load on the crop on the one hand, and use of renewable energy on the other. We examined the radiometric and thermal properties of an OPV module. Module transmissivity was measured under outdoor conditions at four different angles of radiation incidence: 0, 21, 41 and 46°. Simultaneously, the open-circuit voltage, and short-circuit current of the module were recorded for power and efficiency calculations. Supplementary laboratory measurements of transmissivity, reflectivity and absorptivity were performed with a spectroradiometer. To further characterise the OPV module, its overall heat-transfer coefficient (U value) was determined. The examined module had about 20% transmissivity, 15% reflectivity and 65% absorptance in the photosynthetically active radiation (PAR) range. The mean daily power conversion efficiency of the module was about 0.8% and the overall heat transfer coefficient U, was about 6.0 Wm−2 K−1. The temperature of a module placed on the polyethylene cover of a greenhouse high tunnel was about 50–55 °C at midday. Thermal images of the module revealed non-uniform heat distribution, with temperature differences between regions reaching up to 7.5 °C. OPV modules appear to be suitable for greenhouse shading and electricity generation but currently they are too expensive and their life duration is relatively short.

Original languageEnglish (US)
Pages (from-to)24-36
Number of pages13
JournalBiosystems Engineering
Volume184
DOIs
StatePublished - Aug 2019

Keywords

  • Efficiency
  • Organic materials
  • Photovoltaic panel
  • Protected crops
  • Solar energy

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Food Science
  • Animal Science and Zoology
  • Agronomy and Crop Science
  • Soil Science

Fingerprint Dive into the research topics of 'Testing organic photovoltaic modules for application as greenhouse cover or shading element'. Together they form a unique fingerprint.

Cite this