Experimental Study on Double-Pass Solar Air Heater with and without using Phase Change Material

Mahmood, Abdulrahman Shakir

doi:10.31026/j.eng.2019.02.01

Cited by 24 publications

(6 citation statements)

References 2 publications

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“…This is because PCMs can be charged and discharged approximately at an isothermal situation, which is of great thermodynamic importance. Moreover, PCMs possess high energy density, making them suitable to store vast amounts of thermal energy in a small volume [4][5][6]. Nonetheless, the major limitation of PCMs is the low thermal conductivity [7][8][9][10], which has encouraged many researchers to set up innovative ideas to overcome the issue.…”

Section: Introductionmentioning

confidence: 99%

Effect of Twisted Fin Array in a Triple-Tube Latent Heat Storage System during the Charging Mode

et al. 2021

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This study aims to assess the effect of adding twisted fins in a triple-tube heat exchanger used for latent heat storage compared with using straight fins and no fins. In the proposed heat exchanger, phase change material (PCM) is placed between the middle annulus while hot water is passed in the inner tube and outer annulus in a counter-current direction, as a superior method to melt the PCM and store the thermal energy. The behavior of the system was assessed regarding the liquid fraction and temperature distributions as well as charging time and energy storage rate. The results indicate the advantages of adding twisted fins compared with those of using straight fins. The effect of several twisted fins was also studied to discover its effectiveness on the melting rate. The results demonstrate that deployment of four twisted fins reduced the melting time by 18% compared with using the same number of straight fins, and 25% compared with the no-fins case considering a similar PCM mass. Moreover, the melting time for the case of using four straight fins was 8.3% lower than that compared with the no-fins case. By raising the fins’ number from two to four and six, the heat storage rate rose 14.2% and 25.4%, respectively. This study presents the effects of novel configurations of fins in PCM-based thermal energy storage to deliver innovative products toward commercialization, which can be manufactured with additive manufacturing.

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Section: Introductionmentioning

confidence: 99%

Effect of Twisted Fin Array in a Triple-Tube Latent Heat Storage System during the Charging Mode

et al. 2021

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“…The principal use of solar energy radiation is the solar air heater (SAH) 6 . SAH is a system used in heating air that utilized for a variety of purposes, including, greenhouse dehydration, household heating, industrial operations power production space heating, and dehydrating of agricultural goods 7 . SAH is easy to install, and maintenance.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of two solar air heaters, with and without employing PCM

Midhat,

Aljubury

2024

Energy Storage

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In the present study, an experimental test was conducted to investigate the energetic performance of a novel designed solar air heaters (SAHs), with, and without phase change material (PCM). Two identical SAHs were fabricated and tested to compare their performance. The first heater is a jacket‐tube solar air heater (SAH 1), while the second heater is similar to the first but filled with PCM (SAH 2). Experimental results showed that increasing air flow rate increases the daily thermal efficiency. Thermal energy during day hours can be stored in the PCM and used after sunset. SAH 2 gave an additional operating time after sunset for 4 hours at 0.01 kg/s, 2.5 hours at 0.035 kg/s, and 1 hour at 0.06 kg/s. Maximum improvement in the daily thermal efficiency was 15% at SAH 2, more than SAH 1 at 0.01 kg/s air flow rate. Employing PCM, as so as increasing air flow rate can reduce the daily thermal losses.

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“…Many solar energy applications have been studied, such as solar air heaters, water heaters, water desalination, and air-drying systems [4][5][6][7][8]. Solar air heaters have many unique features; they do not suffer from freezing, leakage, or the accumulation of salt problems.…”

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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Experimental Study on Double-Pass Solar Air Heater with and without using Phase Change Material

Cited by 24 publications

References 2 publications

Effect of Twisted Fin Array in a Triple-Tube Latent Heat Storage System during the Charging Mode

Effect of Twisted Fin Array in a Triple-Tube Latent Heat Storage System during the Charging Mode

Experimental investigation of two solar air heaters, with and without employing PCM

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

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