Simulation of seasonal changes in radiant flux energy in a greenhouse installed with light-transmitting organic photovoltaics

K. Teranaka, T. Ikeda, M. Doi
The generation and use of renewable energy is expected to reduce CO2 emissions in greenhouse horticulture. To elucidate the appropriate installation method of organic photovoltaics (OPVs) in a tomato greenhouse (162 m2), we simulated solar radiation on the greenhouse floor by thermal fluid analysis. Covering the greenhouse exterior with frosted ETFE film minimized the positional deviation of the daily cumulative amount of solar radiation, and the daily cumulative amount of solar radiation in the frosted ETFE greenhouse was approximately 22% lower than that in the transparent ETFE greenhouse. The installation direction of the long axes of OPV panels had little effect on the daily cumulative amount of solar radiation. The daily cumulative amount of solar radiation in winter (2.3 kWh m-2) was almost half that in summer (4.3 kWh m-2). Installation of OPV panels at the upper portion of the greenhouse south end should be avoided especially in winter season. From these results and other OPV characteristics, we propose an OPV panel installation plan. In the winter installation plan, the number of panels totals 86 (24% coverage) and in the summer version, it totals 106 (30% coverage).
Teranaka, K., Ikeda, T. and Doi, M. (2018). Simulation of seasonal changes in radiant flux energy in a greenhouse installed with light-transmitting organic photovoltaics. Acta Hortic. 1208, 339-346
DOI: 10.17660/ActaHortic.2018.1208.46
https://doi.org/10.17660/ActaHortic.2018.1208.46
cumulative amount of solar radiation, direct energy input, frosted ETFE, tomato greenhouse, OPV installation
English

Acta Horticulturae