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פותח על ידי קלירמאש פתרונות בע"מ -
Testing organic photovoltaic modules for application as greenhouse cover or shading element
Year:
2019
Source of publication :
Biosystems Engineering
Authors :
בריקמן, רומן
;
.
גאולה, פרהד
;
.
טייטל, מאיר
;
.
לוי, אשר
;
.
עוזר, שי
;
.
פרימן פרץ, מעיין
;
.
רוזנפלד, לביא
;
.
Volume :
184
Co-Authors:

Yehia, I., Triangle Research and Development Center, P.O. Box 2167, Kfar-Qari, 30075, Israel;  Magadley, E., Triangle Research and Development Center, P.O. Box 2167, Kfar-Qari, 30075, Israel;   Levy, A., Department of Mechanical Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 81405, Israel; Kacira, M., Biosystems Engineering, The University of Arizona, Tucson, AZ  85721, United States;

Facilitators :
From page:
24
To page:
36
(
Total pages:
13
)
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.

Note:
Related Files :
Crops
Efficiency
greenhouses
Overall heat transfer coefficient
Protected crops
Temperature differences
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.biosystemseng.2019.05.003
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
41900
Last updated date:
02/03/2022 17:27
Creation date:
26/06/2019 10:00
You may also be interested in
Scientific Publication
Testing organic photovoltaic modules for application as greenhouse cover or shading element
184

Yehia, I., Triangle Research and Development Center, P.O. Box 2167, Kfar-Qari, 30075, Israel;  Magadley, E., Triangle Research and Development Center, P.O. Box 2167, Kfar-Qari, 30075, Israel;   Levy, A., Department of Mechanical Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 81405, Israel; Kacira, M., Biosystems Engineering, The University of Arizona, Tucson, AZ  85721, United States;

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

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.

Scientific Publication
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