Feasibility study for combining cooling and high grade energy production in a solar greenhouse

Sonneveld, P.J.; Swinkels, G.L.A.M.; Bot, G.P.A.; Flamand, Giovanni

doi:10.1016/j.biosystemseng.2009.09.012

Cited by 81 publications

(32 citation statements)

References 7 publications

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“…4.4 Challenges for the use of roof-mounted solar panels in greenhouses Ever since the application of PV modules to agriculture land was proposed (Goetzberger and Zastrow, 1982), there has been a growing interest in the installation of PV module frames on greenhouse roofs (e.g. Yano et al, 2007, Sonneveld et al, 2010. Power generation by roof-mounted PV modules may provide additional income to farmers if the crop production is comparable to production in a normal greenhouse.…”

Section: Effect Of Light Regime On Lettuce Quality and Photosynthesismentioning

confidence: 99%

Improvement in lettuce growth by light diffusion under solar panels

Tani

Shiina

Nakashima

et al. 2014

J. Agric. Meteorol.

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Power generation by roof-mounted photovoltaic (PV) modules may provide additional income to farmers if the crop production is comparable to production under normal greenhouse conditions. However, fluctuating irradiance caused by the partial shade of PV modules has been reported to reduce crop production. In the present study, we have shown for the first time the possibility of improving lettuce growth by using light diffusion films under roof-mounted PV modules. The effects of different light conditions (direct but fluctuating and diffused but uniform irradiations) under PV modules on the morphology, yield, and photosynthesis of hydroponically grown lettuce were investigated. Lettuce growth was inhibited, resulting in lower dry weight and relative growth rate (RGR) with longer leaves, under the fluctuating light by roof-mounted PV modules compared to normal greenhouse conditions. On the other hand, the ratio of leaf width to length increased under diffused light conditions and the values were comparable to those in the control in spring, summer, and fall cultivations. Although the net photosynthetic rate of fully expanded leaves of lettuce grown under diffused light was lowest, their dry weight and RGR were comparable to the control in summer and fall cultivations. Diffused light might penetrate into the lower layers of the leaf canopy, thereby increasing the CO 2 fixation of the whole canopy. Our results suggest that the application of light diffusion films is a viable option for improving crop productivity under roof-mounted PV modules.

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Section: Effect Of Light Regime On Lettuce Quality and Photosynthesismentioning

confidence: 99%

Improvement in lettuce growth by light diffusion under solar panels

Tani

Shiina

Nakashima

et al. 2014

J. Agric. Meteorol.

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“…The model is developed by Wageningen University & Research with focus on greenhouse applications. The model used is evolved, validated and used to design new greenhouse concepts such as electricity producing greenhouses with NIR filtering (Sonneveld et al, 2010), greenhouses with Fresnel lenses (Sonneveld et al, 2011), surface structures for increasing light transmissivity and scattering (Swinkels et al, 2001) and bio reactors for algae production. There are some key features which make RAYPRO a suitable model for these kinds of issues.…”

Section: Ray-tracing Modelmentioning

confidence: 99%

Increase of light transmission of a Venlo-type greenhouse during winter by 10%: a design study

Kempkes¹,

Swinkels²,

Hemming³

2018

Acta Hortic.

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“…The energy converted by crop photosynthesis in a greenhouse is <1 % of the solar energy so can be neglected when considering the heat load of the greenhouse. Therefore, conventional cooling by ventilation is applied to withdraw the excess sensible heat, especially in the summer season [17]. The entered sun rays to a solar greenhouse can shine freely to the greenhouse floor, when the entropy generation is reached its lowest value; and then, the process of photosynthesis will occur in the desired form.…”

Section: Introductionmentioning

confidence: 99%