Impacts of adding porous media on performance of double-pass solar air heater under natural and forced air circulation processes

Salih, Mothana M. Mohamed; Yassien, Husam Naufal Saleh

doi:10.1016/j.ijmecsci.2021.106738

Cited by 49 publications

(24 citation statements)

References 47 publications

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“…Any experimental work must include an uncertainty analysis to indicate the possible error values in measurement instruments. The uncertainty values were computed depending on the following formula [31].…”

Section: Uncertainty Analysismentioning

confidence: 99%

Thermal Performance of a Counter-Flow Double-Pass Solar Air Heater With The Steady and Pulsating Flow

Hussein¹,

Ahmed²,

Ekaid³

2022

ETJ

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 The tubular solar absorber is placed perpendicularly to the direction of airflow.  Pulsating flow increases the thermal performance by up to 15.2%  Thermal performance is directly proportional to the pulsating frequency.The present work studied the influence of pulsating flow as an active method on the thermal performance of a double-pass solar air heater with a tubular solar absorber. A ball valve has been used as a pulse generator mounted at the downstream flow of the solar air heater. The experiments were under indoor conditions with a constant heat flux of 1000 W/m 2 , and different air mass flow rates ranged from 0.01 to 0.03 kg/s. Moreover, the study covered three pulsation frequencies varied from 1 to 3 Hz. Based on the experimental outcomes, it can be observed that the heat transfer rate is enhanced by applying the pulsating flow, where it was found that the outlet temperature in the case of applying the pulsating flow rises by about 25.6 -27% as compared with the steady flow case. Moreover, pulsating flow offers a higher effective thermal performance by about 15.2 % at the maximum air mass flow rate compared with the steady flow. In addition, the findings pointed out that varying the pulsation frequency from 1 to 3 Hz produces an enhancement in heat transfer rate and in solar heater effective efficiency, where it was found that when changing the frequency from 1 to 3, the increment of effective efficiency ranged from 3.8 to 6.9 % depending on the air mass flow value.

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Section: Uncertainty Analysismentioning

confidence: 99%

Thermal Performance of a Counter-Flow Double-Pass Solar Air Heater With The Steady and Pulsating Flow

Hussein¹,

Ahmed²,

Ekaid³

2022

ETJ

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“…Solar air heater (SAH) model considers a simple conventional system which is utilized in several thermal applications with moderate temperature for example, drying applications and power generation. 5,6 On the other hand, SAH systems have also several limitations while changing the solar energy to heat the air, for example, limited absorber surface area, pressure drop inside the collector, low air thermal conductivity, and the energy losses. 7,8 Therefore, several studies have been presented novel geometries in order to eliminate these issues and to rise the effectiveness of SAH.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the solar systems have large possibility in transforming the solar energy for generating electricity and heating, where the working fluid can be either gas or liquid to collect the solar radiation and then convert it to heat. Solar air heater (SAH) model considers a simple conventional system which is utilized in several thermal applications with moderate temperature for example, drying applications and power generation 5,6 . On the other hand, SAH systems have also several limitations while changing the solar energy to heat the air, for example, limited absorber surface area, pressure drop inside the collector, low air thermal conductivity, and the energy losses 7,8 .…”

Section: Introductionmentioning

confidence: 99%

“…To recognize the impacts of Model-1 in comparison with Model-2, the experimentations have been conducted in December 2020 in Mosul city, Iraq under standard weather conditions. 5 In the current study, the temperatures of plate, ambient air, exit air and inlet air, mass flowrate, solar radiation, and pressure drop have been measured. The performances of Model-1 and Model-2 have been also compared.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the placing perforations in the groove without using a guide plate to the air flowing through the v‐corrugated plate groove leads to rise the system efficiency and shrink the weight of the collector. To recognize the impacts of Model‐1 in comparison with Model‐2, the experimentations have been conducted in December 2020 in Mosul city, Iraq under standard weather conditions 5 . In the current study, the temperatures of plate, ambient air, exit air and inlet air, mass flowrate, solar radiation, and pressure drop have been measured.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improving the performance of solar air heater using a new model of V‐corrugated absorber plate having perforations jets

Maher

Salih

2022

Intl J of Energy Research

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Summary An experimental investigation on the performance of a solar air heater (SAH) system has been performed using a new model of v‐corrugated absorber plate having perforations jets. The effectiveness of new model has been compared with the conventional v‐corrugated absorber plate under identical operating conditions to display the effectiveness of new model. The new collector has been referred to Model‐1, whereas the conventional model has been referred to Model‐2. The experimentations have been conducted in December 2020. The results demonstrate that the performance of Model‐1 is considerably higher than Model‐2 by 9%, 11%, and 11.5% for the air mass flowrates 0.01, 0.015, and 0.02 kg/s, respectively. As mass flowrate is increased, the performances of both models have increased, where the highest efficiencies of Model‐1 and Model‐2 have been found 84.5% and 73%, respectively. A substantial difference in temperature has been found in Model‐1 as compared to the rest model. Regardless of the air velocity values, the maximum outlet temperatures have been found in Model‐1, whereas the peak plate temperatures have been observed in Model‐2. The improvement in the performance of Model‐1 confirms that the utilize of perforations jets v‐corrugated absorber plate has an extreme action on the rate of heat transfer.

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Performance analysis of single‐pass solar air heater thermal collector with adding porous media and finned plate

Salih

Maher

2023

Energy Storage

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The recent study encompasses a practical inspect on adding porous material above absorber flat plate having fins to improve the effectiveness of solar air heater (SAH) collector along with forced air circulation process. The efficiency of the altered model and conventional SAH system is compared at the same time to display the impacts of adding porous material. The model that used porous material is called Model‐2, whereas the conventional SAH is called Model‐1. The measuring data is collected in January 2021 in Iraq (Mosul city). Outcomes emphasize that the effectiveness of altered model is better than traditional model by 7% for all air mass flow rates values. The highest efficiency is obtained equal 67% for Model‐2 and 60% for Model‐1 for mass flow rate 0.02 kg/s. For all mass flow rate values, a substantially change in temperature is observed in altered system as compared to traditional system, where the exhaust temperature of Model‐2 is higher than Model‐1. The improvement in the effectiveness of Model‐2 demonstrates that the employ of porous material has an extreme action on the heat exchange and subsequently heat transfer rate.

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Impacts of adding porous media on performance of double-pass solar air heater under natural and forced air circulation processes

Cited by 49 publications

References 47 publications

Thermal Performance of a Counter-Flow Double-Pass Solar Air Heater With The Steady and Pulsating Flow

Thermal Performance of a Counter-Flow Double-Pass Solar Air Heater With The Steady and Pulsating Flow

Improving the performance of solar air heater using a new model of V‐corrugated absorber plate having perforations jets

Performance analysis of single‐pass solar air heater thermal collector with adding porous media and finned plate

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