Performance of photovoltaic canarian greenhouse: A comparison study between summer and winter seasons

Ezzaeri, K.; Fatnassi, H.; Wifaya, Ahmed; Bazgaou, A.; Aharoune, A.; Poncet, C.; Bekkaoui, A.; Bouirden, L.

doi:10.1016/j.solener.2020.01.057

Cited by 61 publications

(15 citation statements)

References 27 publications

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“…In this case, the implementation of PV into agricultural settings is through integrating PV modules into the greenhouse's envelope, mainly the roof [36][37][38][39][40][41]. However, conventional opaque PV modules produce shade, thereby significantly affecting the microclimate inside the structure (air temperature, relative humidity, level of light and CO 2 concentration) and productivity [42][43][44][45][46]. To minimize this effect, one approach is to use completely opaque PV modules that cover part of the greenhouse roof or PV modules with partial opaque sections that produce electricity (Figure 8a).…”

Section: Current Design Solution and Technologiesmentioning

confidence: 99%

Agrivoltaic Systems Design and Assessment: A Critical Review, and a Descriptive Model towards a Sustainable Landscape Vision (Three-Dimensional Agrivoltaic Patterns)

2021

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As an answer to the increasing demand for photovoltaics as a key element in the energy transition strategy of many countries—which entails land use issues, as well as concerns regarding landscape transformation, biodiversity, ecosystems and human well-being—new approaches and market segments have emerged that consider integrated perspectives. Among these, agrivoltaics is emerging as very promising for allowing benefits in the food–energy (and water) nexus. Demonstrative projects are developing worldwide, and experience with varied design solutions suitable for the scale up to commercial scale is being gathered based primarily on efficiency considerations; nevertheless, it is unquestionable that with the increase in the size, from the demonstration to the commercial scale, attention has to be paid to ecological impacts associated to specific design choices, and namely to those related to landscape transformation issues. This study reviews and analyzes the technological and spatial design options that have become available to date implementing a rigorous, comprehensive analysis based on the most updated knowledge in the field, and proposes a thorough methodology based on design and performance parameters that enable us to define the main attributes of the system from a trans-disciplinary perspective.

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Section: Current Design Solution and Technologiesmentioning

confidence: 99%

Agrivoltaic Systems Design and Assessment: A Critical Review, and a Descriptive Model towards a Sustainable Landscape Vision (Three-Dimensional Agrivoltaic Patterns)

2021

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“…Px, photosynthetically active radiation of crops (kW/m2); η, the effective ratio of photosynthetic radiation, 0.47 on sunny days and 0.5 on cloudy days; μ, unit conversion value of photosynthetic radiation to convert (μmol/m 2 • s) to (w/m 2 ), it is assigned a value of 4.55 in this paper; Kprod, the cumulative coefficient of production, it is assigned a value of 5 in this paper; tresp, response time, it is assigned a value of 3600 s in this paper. The annual income model of AP-PVG is as follows:…”

Section: Annual Income Model Of Ap-pvgmentioning

confidence: 99%

“…α、γ, light response coefficient; β, correction factor; I, photosynthetically active radiation of crops (μmol/m2 • s); Rd, crop respiration rate (μmol/m 2 • s). In a PVG, the solar radiation of greenhouse crops is distributed as PX (kW/m 2 ).…”

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confidence: 99%

“…In a PVG, the solar radiation of greenhouse crops is distributed as PX (kW/m 2 ). After the unit transformation of the crop respiration rate, the solar radiation yield model of PVG crops is as follows (6): active radiation of crops (kW/m2); η, the effective ratio of photosynthetic radiation, 0.47 on sunny days and 0.5 on cloudy days; μ, unit conversion value of photosynthetic radiation to convert (μmol/m2 • s) to (w/m 2 )…”

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confidence: 99%

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Solar Radiation Distribution Method for a Photovoltaic Greenhouse based on the Maximization of Annual Economic Benefits

Wang

Zhou

2021

Preprint

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A solar radiation distribution method is proposed based on the maximization of economic benefits for photovoltaic power generation and agricultural production in a photovoltaic greenhouse to solve the problem of low overall economic benefits because of an unreasonable solar radiation distribution between photovoltaic power generation and agricultural production in the photovoltaic greenhouse. First, a mathematical model of the solar radiation yield of photovoltaic greenhouse crops is proposed based on a rectangular hyperbolic modified light response model of crops to represent the relationship between solar radiation energy and crop production. Second, a mathematical model of the average annual revenue of a photovoltaic greenhouse is established to determine the maximum annual economic benefit of the photovoltaic greenhouse, and the model is constrained by the requirements of the light intensity of photovoltaic power generation and environmental conditions for the growth of greenhouse crops. Finally, the correctness of the model is verified by actual operation data of a photovoltaic greenhouse in Xinjiang, and the optimal solar radiation distribution proportion is calculated. This study provides theoretical support for the design of photovoltaic greenhouses.

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“…The increase in the world's population, together with the deterioration of natural resources and current and future food demands, is one of the frequent problems that receives the most attention within the working agendas of the governmental and non-governmental entities of the nations (Akrami et al, 2020). One of the alternatives of intensification of the agriculture more promoted for the food production is the agriculture under cover, at present it is estimated that for the production of fresh vegetables there are about 3,220,000 has under this type of productive system and of this total approximately 95% of the area are medium and low technology structures, within which one of the most relevant are passive type greenhouse structures, which are used in more than 115 countries worldwide (Baeza et al, 2020;Ezzaeri et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Implementation of ventilation towers in a greenhouse established in low altitude tropical climate conditions: numerical approach to the behavior of the natural ventilation

Villagrán

2021

Rev. Ceres

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Implementation of ventilation towers in a greenhouse established in low altitude tropical climate conditions: numerical approach to the behavior of the natural ventilation Deficient ventilation rates and airflow patterns in naturally ventilated greenhouses are the main causes for the generation of inadequate and heterogeneous thermal conditions inside this type of structure. In this research, a numerical study was developed using a two-dimensional computational fluid dynamics model validated in a Colombian greenhouse established under warm climate conditions (PG). The objective of the research was to evaluate the effect on natural ventilation generated by the coupling of two ventilation towers on the PG greenhouse, scenario called MPG. The results indicated that airflow patterns over the region where crops are established in MPG are between 25.9% and up to 142.5% faster compared to PG, which generates ventilation rates up to 57.3% higher in MPG, which is why the temperature distribution under this scenario is more homogeneous inside the structure and its average thermal differential with the outside environment does not exceed 1.1 °C.

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Performance of photovoltaic canarian greenhouse: A comparison study between summer and winter seasons

Cited by 61 publications

References 27 publications

Agrivoltaic Systems Design and Assessment: A Critical Review, and a Descriptive Model towards a Sustainable Landscape Vision (Three-Dimensional Agrivoltaic Patterns)

Agrivoltaic Systems Design and Assessment: A Critical Review, and a Descriptive Model towards a Sustainable Landscape Vision (Three-Dimensional Agrivoltaic Patterns)

Solar Radiation Distribution Method for a Photovoltaic Greenhouse based on the Maximization of Annual Economic Benefits

Implementation of ventilation towers in a greenhouse established in low altitude tropical climate conditions: numerical approach to the behavior of the natural ventilation

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