Air-cooled photovoltaic roof tile as an example of the BIPVT system – An experimental study on the energy and exergy performance

Wajs, Jan; Gołąbek, Aleksandra; Bochniak, Roksana; Mikielewicz, Dariusz

doi:10.1016/j.energy.2020.117255

Cited by 47 publications

(13 citation statements)

References 18 publications

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“…It is noticeable that pattern 5 covered the longest distance underneath the panel, which conceivably created the largest cooling area and therefore the largest amount of heat. Changing the length and depth of a cooling path can affect the behavior of the PV [43][44][45][46]. On the other hand, cooling pattern 1 produced the lowest efficiencies and the highest surface temperatures.…”

Section: Resultsmentioning

confidence: 99%

Investigation of a Real-Time Dynamic Model for a PV Cooling System

et al. 2022

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The cooling of PV models is an important process that enhances the generated electricity from these models, especially in hot areas. In this work, a new, active cooling algorithm is proposed based on active fan cooling and an artificial neural network, which is named the artificial dynamic neural network Fan cooling algorithm (DNNFC). The proposed system attaches five fans to the back of a PV model. Subsequently, only two fans work at any given time to circulate the air under the PV model in order to cool it down. Five different patterns of working fans have been experimented with in this work. To select the optimal pattern for any given time, a back propagation neural network model was trained. The algorithm is a dynamic algorithm since it re-trains the model with new recorded surface temperatures over time. In this way, the model automatically adapts to any weather and environmental conditions. The model was trained with an indoor dataset and tested with an outdoor dataset. An accuracy of more than 97% has been recorded, with a mean square error of approximately 0.02.

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Section: Resultsmentioning

confidence: 99%

Investigation of a Real-Time Dynamic Model for a PV Cooling System

et al. 2022

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“…Uncertainty analysis is carried out by employing the approach explained in Refs. [32,33], which can be calculated by:…”

Section: Uncertainty Analysismentioning

confidence: 99%

Thermal Performance Combined with Cooling System Parameters Study for a Roller Kiln Based on Energy-Exergy Analysis

Wang

Yang

2020

Energies

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Roller kilns, characterized as high energy consumption equipment, are widely used in the firing process of ceramic tiles. To evaluate the thermal performance of a roller kiln, a detailed energy and exergy analysis is carried out employing the operating values from a typical ceramic factory. In this study, parametric studies are performed that examine the impacts of the roller kiln’s cooling system on thermal performance, fuel-saving, cost-saving, and environmental influence. The results show that the targeted energy only accounts for 13.4% and 9.7% of the total energy and exergy inputs, indicating the poor efficiency of the roller kiln. This research also identifies that the exergy destruction is the largest cause of the exergy loss in the system, accounting for 85.1% of the total exergy input—of which 50.9% is due to heat and mass transfer, and 37.9% is caused by fuel combustion. Based on the parametric studies, it has been found that with every 1% increase in cooling air mass flow, the energy and the exergy efficiencies of the kiln increase by 0.06% and 0.04%; with every 1% increase in cooling gas temperature, the energy and the exergy efficiencies of the kiln drop by 0.09% and 0.07%; with every 1% increase in cooling gas residence time, the energy and the exergy efficiencies of the kiln increase by 0.16% and 0.12%. Furthermore, results show that the cooling air residence time has the main impact on the cost-saving and carbon dioxide emission reduction, followed by cooling air mass and cooling air temperature.

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“…Hybrid systems are more energy efficient, with a smaller location area, for this reason they have recently appeared on the market. Recent research on the solar energy and hybrid system [1][2][3][4][5][6][7][8][9], but also earlier paper like [10][11][12] studied and presented the increase of electricity and electric performances as effect of cooling the photovoltaic panel with air or water and the increase of the efficiency by recovering the heat. Other works as [7], [13][14][15], present the integration of PV and thermal solar panels in the construction of residential or office buildings.…”

Section: Introductionmentioning

confidence: 99%

Solar Hybrid System for Electricity and Air Heating - Experimental Research

Budea

Simionescu

2023

IOP Conf. Ser.: Earth Environ. Sci.

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In the current energy context, solar energy is the cheapest source of renewable energy. Photovoltaic solar cells (PV) and air thermal collectors (ATC) are used to convert solar irradiation into electricity and heat. In this research a model for a hybrid solar system consisting in a photovoltaic panel behind which is a hot air collector was designed and tested. This system produces both electricity and heat, from the sun, based on principle two in one. In the Romanian climatic conditions, such solar systems can be easily integrated into residential or office buildings. By cooling with air, the photovoltaic panel and recovering the thermal energy, the electric power increase with about 7.905% for a solar irradiance of 750 W/m2. The warm air collected from behind the panel had a temperature of 5.5° C (Celsius degrees) higher, depending on the air velocity provided by the tangential fan. The experimental research demonstrates the efficiency of a PV-ATC hybrid system: 11.16% for the electrical efficiency, 45.27% for the thermal efficiency and 56.44% for the total efficiency.

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Air-cooled photovoltaic roof tile as an example of the BIPVT system – An experimental study on the energy and exergy performance

Cited by 47 publications

References 18 publications

Investigation of a Real-Time Dynamic Model for a PV Cooling System

Investigation of a Real-Time Dynamic Model for a PV Cooling System

Thermal Performance Combined with Cooling System Parameters Study for a Roller Kiln Based on Energy-Exergy Analysis

Solar Hybrid System for Electricity and Air Heating - Experimental Research

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