A detailed simulation-based study on the effect of mirror integration on PV Module(s) with analysis of different wind flow scheme

Agrawal, Monika; Kumar, Avinash

doi:10.1016/j.solener.2021.05.028

Cited by 17 publications

(5 citation statements)

References 35 publications

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“…On the other hand, the reflected radiation is affected by the opening angle formed at the bottom edge between the PV module and the reflector. As the previous studies found, it is influenced by the reflector size and respective system tilt, resulting in the electrical power gain variance [6,58,65].…”

Section: Resultsmentioning

confidence: 99%

“…Annual energy generation from a 40 W p C‐Si photovoltaic module (tilted at a fixed latitude angle) is 77.88 kWh for the Jaipur location [58]. As mentioned in reference [6], the power yield enhancement factor for reflector integration in existing and newly constructed photovoltaic plants varies.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, there is a higher power gain from the PV module with the integration of the mirror in comparison with the stainless steel reflector. The commercial reflectors have a positive impact on the PV module's power yield.However, the plasmonic absorption at the silvered back reflector in the PV module is increased as well due to the higher concentration of IR photons, which raises the module temperature[58,62,63]. In the proposed approach, TCO-coated glasses have been integrated with the mirror (ITO//Mirror, FTO//Mirror) which reduces the reflection of IR photons by 50% comparatively.…”

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confidence: 99%

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Reassessment of different flat TCO integrated reflectors for the crystalline silicon solar PV module in view of its longer operational life

Agrawal

Chowdhury

2022

Progress in Photovoltaics

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In the present simulation work with experimental validation, the performance of a transparent conductive oxide (TCO) film‐coated spectrally selective reflector in the low‐concentrated photovoltaic application has been analysed. The use of mirrors in solar photovoltaic (PV) applications is a well‐established thing. However, it increases the operating temperature and requires more thermally stable, expensive solar modules. In this regard, for the first time, commercially available TCO‐coated glasses such as fluorine‐doped tin oxide (FTO) and indium tin oxide (ITO) have been integrated with mirrors. The spectrally selective reflector is a promising technology to achieve a high‐power yield from the commercially available crystalline silicon photovoltaic (C‐Si PV) module during its lifetime. They have the property to absorb unwanted photons in the region of the AM1.5 spectrum (1200 to 2000 nm), which partially thermalises the solar module through plasmonic absorption. The present study found that the proposed approach helps to restrict the increase in PV module temperature caused by the reflected rays from a mirror. The electrical performance of a standalone C‐Si PV was compared with that of the same system after the addition of FTO, ITO and a conventional mirror system. Our analysis indicates that, with the mirror integration, the degradation rate can increase to 1.5% per year if the standalone PV module's ageing rate is 0.8% per year. Through FTO incorporation with the same, the ageing rate has been reduced by up to 1.18% per year due to a reduction in temperature. This result is quite interesting, considering that spectrally selective reflectors do not stop high‐energy photons from thermalizing the PV module. The entire work has been done on commercially available materials, which makes it easier and ready to be implemented in large PV plants. Highlights A spectrally selective mirror for PV power boosting. Transparent conductive oxide (TCO) glass integration with mirror reduces the IR concentration approximately 50%. The reduction in thermalisation of PV module from the mirror by 3–5°C. This integration increases the PV module operational life by at least 4 years compared with commercial mirror.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Reassessment of different flat TCO integrated reflectors for the crystalline silicon solar PV module in view of its longer operational life

Agrawal

Chowdhury

2022

Progress in Photovoltaics

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“…Roof mounted photovoltaic (PV) panel systems are widely used in modern society. The natural flow of wind effectively reduces the elevated temperature and the direction of wind flow plays a very prominent role in heat evacuation for PV panel systems (Agrawal et al 2021). And wind load is one of controlling loads in design of these systems, comprehensive study of wind load characteristics and aerodynamic mechanisms of photovoltaic panels is an essential work for design.…”

Section: Introductionmentioning

confidence: 99%

Wind load characteristics of photovoltaic panel arrays mounted on flat roof

Mao

et al. 2022

Eng. Res. Express

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To quantify design wind load of photovoltaic panel array mounted on flat roof, wind tunnel tests were conducted in this study. Results show that the first and the last two rows on the roof are the most unfavorable ones regarding to the wind load. Influences of array spacing, panels’ tilt angle and parapet height on wind load of the panels are studied. Most unfavorable lift force of panels decreases with increase of array spacing for middle located panels. The aerodynamics are similar to flow over repeated hills. Middle located unit got greater turbulence, which leading to unfavorable Cfp_min. While the changing amplitude of most unfavorable wind pressure is small increase with array spacing. Cfp_max and Cfp_min of panel units shows quite strong dependence on tilt angle. There is significant pressure equalization for small tilt angle cases. The local flow separation is responsible for Cfp_min of larger tilt angle cases. Parapet height of 2h (h is the panel height projected on the vertical plane) is the critical height for Cfp_max and Cfp_min. Increasing parapet height can significantly reduce the wind load of panel units. Design pressure coefficient of the basic working condition with different area sizes at different location are proposed.

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“…Moreover, the effect of using mirrors was investigated in terms of the produced power and a moderate enhancement of 12.4% was observed. In a simulation-based study, Agrawal et al [28] focused on a PV module (crystalline type) with a stainless steel sheet installed in front of it as a sunlight reflector. Additionally, the effect of wind velocity was evaluated.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Simultaneous Use of Metal Fins and Mirror to Improve the Performance of Photovoltaic Panels

2022

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The world is inconceivable without an everlasting demand for energy. Nowadays, various kinds of renewable energies, such as solar energy, are developing rapidly, since they have the least negative environmental impacts. Irradiation intensity is one the most important parameters in photovoltaic (PV) technology, and so integration of mirrors with a PV module can improve its performance. Mounting mirrors increases the radiation intensity but, at the same time, raises the surface temperature, which in turn reduces the electrical efficiency. The novelty of this study is keeping the cell temperature low despite receiving more radiation by installing 10 aluminum fins on the back of the panel. All tests were experimentally performed in the hot climate of Dezful, Iran. As a result, the best tilt angle of the mirror was found at 30°, where the output power was enhanced by 3.3% and electrical efficiency was reduced by 0.5% compared with the conventional case. When aluminum fins were added as heat sinks, both output power and electrical efficiency were enhanced by 11.4% and 13.1%, respectively. Moreover, comprehensive discussions on both energy and exergy are provided. The entropy generation was also calculated and accordingly, the case of PV 30 + fin generates 1.6% less entropy than the base one.

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A detailed simulation-based study on the effect of mirror integration on PV Module(s) with analysis of different wind flow scheme

Cited by 17 publications

References 35 publications

Reassessment of different flat TCO integrated reflectors for the crystalline silicon solar PV module in view of its longer operational life

Reassessment of different flat TCO integrated reflectors for the crystalline silicon solar PV module in view of its longer operational life

Wind load characteristics of photovoltaic panel arrays mounted on flat roof

An Experimental Study on Simultaneous Use of Metal Fins and Mirror to Improve the Performance of Photovoltaic Panels

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