Current status and prospect of integrating solar air heating systems for drying in various sectors and industries

Lingayat, Abhay; Zachariah, Richu; Modi, Anish

doi:10.1016/j.seta.2022.102274

Cited by 15 publications

(6 citation statements)

References 191 publications

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“…Solar air heaters (SAH) provide an eco-friendly and sustainable means of harnessing solar energy for various applications, promoting energy conservation, and mitigating the release of greenhouse gases. Their simplicity and adaptability make them valuable tools across different sectors, such as space heating [5][6][7], desalination [8], drying of agricultural and industrial products [9,10], etc. However, the main drawback of SAHs operating within moderate temperature ranges is their poor thermal efficiency [11,12].…”

Section: Introductionmentioning

confidence: 99%

Computational insights into the thermal performance enhancement of solar air heater channel through metal foam integration

Al-Chlaihawi,

Hasan,

Kaied

2024

ETJ

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 Fluid flow and heat transfer in an SAH channel with metal foam were simulated  The LTNE and DEF models were used.  The thermo-hydraulic performance of SAH was analyzed, considering several key factors.  Compared to the empty SAH duct, Nu rises 9-10.6 times and friction factor by 53.5-56.6 times.  TPF varies from 2.33 to 2.82 at H f =0.6 and ω=10 PPI.The two-dimensional numerical simulations focused on fluid flow and heat transfer within a solar air heater (SAH) channel incorporating copper metal foam with a porosity of 90% were carried out in this study. The Local Thermal Nonequilibrium (LTNE) and Darcy-Extended Forchheimer (DEF) models were employed to predict fluid and thermal transport in the partially porous SAH channel. In the free flow zone, the turbulence model was utilized. The thermal and thermo-hydraulic performances of SAH were examined concerning several factors, including pore density ( ), Reynolds number ( ), and dimensionless foam height ( ). The results demonstrate that inserting a porous substrate into the SAH can substantially increase heat transmission. This enhancement ranges from 4.4 to 18.04 times compared to an empty duct for at . Moreover, increased porous layer height and pore density lead to a corresponding increase in pressure drop. Evaluating both the improvement in heat transmission and the associated pressure penalty, the case with , and demonstrate superior overall performance, boasting a higher Thermal Performance Factor ( ) of 2.82 when compared to an empty channel. This work presents significant findings on optimizing metal foam applications in SAH systems, offering new insights into the field.

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Section: Introductionmentioning

confidence: 99%

Computational insights into the thermal performance enhancement of solar air heater channel through metal foam integration

Al-Chlaihawi,

Hasan,

Kaied

2024

ETJ

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“…These materials are obtained from firing clay in a specific format (tiles, bricks, blocks, floors, artistic and decorative artifacts, etc.) and are widely used in civil construction [2].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Air Relative Humidity on the Drying Process of Sanitary Ware at Low Temperature: An Experimental Study

Gomez,

Gomes,

Gurgel

et al. 2023

Processes

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Drying is a thermodynamic process in which the moisture contained in the solid is removed by evaporation through the supply of an appreciable amount of thermal energy. It is recognized as a critical and intricate stage in the manufacturing process of ceramic materials. In general, drying at higher temperatures and lower air-relative humidity provokes severe hydric, thermal, and mechanical fractures in the ceramic parts, thus reducing product quality after the process. Then, this process must be realized under controlled conditions. From an industrial point of view, the drying process of sanitary ware takes place in two stages: drying at low temperatures (less than 40 °C) and drying at high temperatures (above 50 °C). Thus, the purpose of this work is to experimentally investigate the drying process at low temperatures in sanitary toilets. Drying experiments were conducted in an oven with the same temperature (35 °C) and different relative humidity of the drying air. The results of the moisture content, temperature, and dimension variations along the process, as well as drying and heating rates, are reported and analyzed. The results indicate that the higher the air’s relative humidity, the slower the moisture removal. Herein, aspects of the product quality after the drying process are also discussed.

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“…Plenty of experimental and analytical studies advocate the implication of solar energy, owing to its pragmatic significance in air heating applications [34] , [35] , [36] , [37] . Notably, the solar parabolic trough collectors (PTC) proved to be the most accessible means of air heating in the built environment.…”

Section: Introductionmentioning

confidence: 99%

“…Notably, the solar parabolic trough collectors (PTC) proved to be the most accessible means of air heating in the built environment. India's geographic condition makes it ideal for using solar energy since it receives more than 5000 trillion kWh of solar radiation yearly [34] . The average annual solar insolation in almost 58% of the country is 5kWh/m 2 /day [37] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Solar energy assisted thermal treatment model to decontaminate airborne viruses in hospital

Soni¹,

Sharma²,

Nimesh³

et al. 2022

Thermal Science and Engineering Progress

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Current status and prospect of integrating solar air heating systems for drying in various sectors and industries

Cited by 15 publications

References 191 publications

Computational insights into the thermal performance enhancement of solar air heater channel through metal foam integration

Computational insights into the thermal performance enhancement of solar air heater channel through metal foam integration

The Effect of Air Relative Humidity on the Drying Process of Sanitary Ware at Low Temperature: An Experimental Study

Solar energy assisted thermal treatment model to decontaminate airborne viruses in hospital

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