Radiation and energy budget dynamics associated with a floating photovoltaic system

Yang, Peipei; Chua, Leok Poh; Irvine, Kim N.; Imberger, Jörg

doi:10.1016/j.watres.2021.117745

Cited by 10 publications

(10 citation statements)

References 32 publications

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“…However, the heat budget includes non-radiative latent heat and sensible heat (the latent and sensible heat are affected by wind speed, which we have assumed to be 0 m/s in the model) beneath the panels, as well as SW and LW radiation. It is the sum of these factors, under equilibrium conditions, which has important implications for surface water temperature (Yang et al 2021).…”

Section: Predictions For 42 Ha Prototype-scale Floating Pv Systemmentioning

confidence: 99%

Impacts of a floating photovoltaic system on temperature and water quality in a shallow tropical reservoir

et al. 2022

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A three-dimensional hydrodynamic-ecological lake model combined with field measurements and sampling was applied to investigate the impacts of floating photovoltaic (PV) systems on hydrodynamics and water quality in a shallow tropical reservoir in Singapore. The model was validated using field data and subsequently applied to predict temperature and water quality changes for a hypothetical 42 ha placement of floating photovoltaic panels, covering about 30% of the water surface and capable of generating up to 50 MW of energy. The impact of the panel placement was studied numerically. The area of the reservoir where panels are placed experiences both light limiting and reduced wind stress conditions. The model indicated an average water temperature increase of 0.3 °C beneath the panels, consistent with the field observation from a 1 ha demonstration installation. Comparisons of model results between the uncovered and covered areas reveal greater stability of the water column (increase in Richardson number from 2.3 to 3.3) and reduction in mixing energy (from 9 × 10–7 to 7 × 10–7 W/kg) under the PV panels. Furthermore, the model predicted that chlorophyll a, total organic carbon and dissolved oxygen concentrations would decline by up to 30%, 15% and 50%, respectively, under the photovoltaic panels. Total nitrogen and total phosphorus, averaged over the water column, increased by 10% and 30%, respectively, under the panels. Distant from the floating solar panels, temperature, stability and water quality were unaffected.

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Section: Predictions For 42 Ha Prototype-scale Floating Pv Systemmentioning

confidence: 99%

Impacts of a floating photovoltaic system on temperature and water quality in a shallow tropical reservoir

et al. 2022

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“…The magnitude of the induced changed would vary with the FPV surface coverage: minor temperature changes should be expected for small coverages (<10%), whereas these would become more significant for larger coverages (>50%). Yang et al (Yang et al, 2021) conducted a valuable investigation on the energy budget of floating photovoltaic systems, concluding that longwave radiation dominate their thermal balance. Indeed, the authors found that, while the presence of modules reduces the shortwave radiation reaching the water, the incoming longwave radiation increases because of the high temperature of the FPV modules during the day.…”

Section: Discussionmentioning

confidence: 99%

The temperature of floating photovoltaics: Case studies, models and recent findings

Micheli

2022

Solar Energy

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“…From the bottom surface, there is a convective heat loss for the air and a radiative heat loss for the water surface. The heat transfer model was based on [10,17,18].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Nu Ni ; and Nu Fi ; represent the Nusselt numbers for natural and forced convection, respectively. For the bottom surface, the expressions are given by equation ( 25) and ( 26) [18].…”

Section: Mathematical Modelmentioning

confidence: 99%

Evaluation of the electrical parameters and performance of floating PV generators

Maia,

Diniz,

Bonfim

et al. 2024

Renew. Energy Environ. Sustain.

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This study provides evaluation of floating photovoltaics (PV) in the Brazil tropical climate and discusses the specific technical and environmental benefits and limitations. This paper develops a model simulating the annual performance of the photovoltaic generator of a floating photovoltaic plant as a function of a given conditions. The reference is a 1.2-MWp floating-PV system commissioned in 2023 near the city of Grão Mogol, Brazil, in the reservoir of the PCH Santa Marta hydropower plant. The influence of the ambient meteorological and marine parameters on the PV module temperature, current, voltage, and power were evaluated. The simulation uses a reference crystalline-Si PV module and the Engineering Equation Solver (EES). Relevant experimental data, including incident solar radiation, ambient temperature, and wind speed were used as input data for the model. The effect of these parameters on the thermal end electrical parameters was assessed. Although small variations were found throughout the year, significant hourly and daily variations were observed, depending on solar irradiation and ambient and resulting module surface temperatures. The voltage at the maximum power decreases with the increase of the solar module surface temperature. The convective heat transfer rates are higher than the radiative heat transfer rates. This study provides a first-time complete energy and exergy analysis of a floating PV system (FPVS) incorporating the various heat transfer rates, electrical and irradiance parameters, under climate and meteorological conditions for this Brazil location.

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Radiation and energy budget dynamics associated with a floating photovoltaic system

Cited by 10 publications

References 32 publications

Impacts of a floating photovoltaic system on temperature and water quality in a shallow tropical reservoir

Impacts of a floating photovoltaic system on temperature and water quality in a shallow tropical reservoir

The temperature of floating photovoltaics: Case studies, models and recent findings

Evaluation of the electrical parameters and performance of floating PV generators

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