Enhanced performance assessment of an integrated evacuated tube and flat plate collector solar air heater with thermal storage material

El-Fakharany, Magda K.; Abo-Samra, Aly-Eldeen A.; Abdelmaqsoud, A.M.; Marzouk, S.A.

doi:10.1016/j.applthermaleng.2024.122653

Cited by 15 publications

(1 citation statement)

References 46 publications

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“…The results showed that the mixture's thermal conductivity increased by about 18.3%, allowing the solar air heater to operate for an additional three hours after dusk. El-Fakharany et al, [22] presented a practical discussion study that included the use of a solar air heater with a flat absorption plate reinforced with a bottom layer of paraffin, and a group of vacuum air tubes were integrated into the solar absorption plate. The results showed that there was an increase in the percentage of accumulated useful energy that ranged from 13 to 16% when using paraffin wax.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Thermal Performance of Solar Air Heater using Nano-PCM

Muntadher Mohammed Ali Saeed,

Hassanain Ghani Hameed,

Hayder Azeez Neamah Diabil

2024

ARFMTS

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Herein, the performance of a solar air heater (SAH) is experimentally investigated, utilising an array of tubes as the absorbent part. The study evaluates the impact of incorporating Al2O3-paraffin wax as a non-PCM storage medium in comparison to a traditional flat-plate solar air heater, specifically under Najaf-Iraq climate conditions. The SAH is positioned at an inclination of 32.1 degrees with respect to the horizon, allowing it to align optimally with the solar direction. The results reveal notable differences in thermal performance characteristics among the various models. The highest thermal efficiency values are observed for distinct configurations: the proposed model achieves about 55.2%, the wax-supported model reaches 55.9%, and the nano-PCM-reinforced model attains 57.7%, while the traditional model lags at 48.2%. Furthermore, an analysis of different air mass flow rates highlights a crucial finding. Specifically, an air mass flow rate of 0.01 kg/s results in a higher temperature exiting from the system compared to a flow rate of 0.02 kg/s. This is attributed to the extended interaction time between the passing air and the absorbing surface, facilitating enhanced heat exchange. Consequently, the system's thermal efficiency experiences an increase. The study underscores the superior thermal performance and efficiency of the tube array nano-PCM collector type under Najaf city-Iraq climate conditions.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Thermal Performance of Solar Air Heater using Nano-PCM

Muntadher Mohammed Ali Saeed,

Hassanain Ghani Hameed,

Hayder Azeez Neamah Diabil

2024

ARFMTS

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Modeling of Heat Transfer and Airflow Inside Evacuated Tube Collector With Heat Storage Media: Experimental Validation Powered by Artificial Neural Network

Elbrashy,

Elgohr,

Elshennawy

et al. 2024

Heat Trans

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Solar air heater (SAH) is a widely employed technology for harnessing solar thermal energy in numerous applications. Contemporary research optimizes designs within identical spatial constraints to maximize energy output. However, there is a recognized need to conduct analytical validation to stimulate the experimental setup and formulate an artificial neural network (ANN) model to govern and predict the operation system. This investigation involved developing and assessing an evacuated tube solar air heater (ETSAH) integrated with annulus‐filled heat storage media. Furthermore, this study introduced an ANN model and analytical solution to predict performance parameters, representing a noteworthy contribution. The proposed ANN model achieved its optimal validation performance with a mean square error of 5.4018 × 10−6 after 11 epochs within 31 of training. Also, correlation findings show that the optimal architecture of a feed‐forward backpropagation is achieved when the 5‐40‐40‐40‐2 model architecture is used. In this case, there are five neural nodes in the input layer that represent timing, temperature, radiation, and airflow rate. The power output of the ETSAH device shows a strong correlation with the flow rate, reaching its peak at 0.05 kg/s with a value of 2261 W and dropping to 368 W at 0.006 kg/s. Correspondingly, the greatest energy efficiency was measured at airflow rates of 0.05, 0.01, and 0.006 kg/s, accounting for 48.38%, 27.32%, and 19.65%, respectively.

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Enhancing photovoltaic/thermal performance with perforated tube within cooling water duct

Baz,

Sharaf,

Aljabr

et al. 2024

Clean Techn Environ Policy

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Enhanced performance assessment of an integrated evacuated tube and flat plate collector solar air heater with thermal storage material

Cited by 15 publications

References 46 publications

Experimental Investigation on Thermal Performance of Solar Air Heater using Nano-PCM

Experimental Investigation on Thermal Performance of Solar Air Heater using Nano-PCM

Modeling of Heat Transfer and Airflow Inside Evacuated Tube Collector With Heat Storage Media: Experimental Validation Powered by Artificial Neural Network

Enhancing photovoltaic/thermal performance with perforated tube within cooling water duct

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