A Review of Energy and Exergy Analyses of a Roughened Solar Air Heater

Phu, Nguyen Minh; Luân, Nguyễn Thành

doi:10.37934/arfmts.77.2.160175

Cited by 19 publications

(7 citation statements)

References 34 publications

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“…Besides, solar energy is clean and safe, it can be captured anywhere and provide energy where other sources cannot. It makes the environment greener and cleaner [5].…”

Section: Introductionmentioning

confidence: 99%

A Simulation Study of Hybrid Solar Drying Chamber for Agriculture Product

Wong Kar Hao,

Mohd Afzanizam Mohd Rosli,

Jayaprakash Ponnaiyan

et al. 2024

CFDL

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Hybrid solar drying chamber is an application that is widely used today for agriculture products because it can promise the hygiene of the product. However, drying chambers nowadays still lack uniformity in drying products within a drying chamber, leading to food wastage and compromised product quality. This study aims to design an innovative hybrid solar drying chamber system and investigate the uniformity of temperature and velocity within the chamber using Computational Fluid Dynamics (CFD). The methodology involves validating the simulation results by comparing them with existing journal data, with a validation error of less than 5%. A new design is proposed after the validation process, considering factors such as tray arrangement and air inlet size. The results show that a tray arrangement with 0.20 m spacing between each tray provides better uniformity in temperature and air velocity distribution compared to other arrangements. Additionally, an inlet size of 0.05 m2 demonstrates the most suitable temperature distribution for drying purposes, falling within the ideal range of 318 K to 343 K. The study showed that the performance of the drying chamber under different operating conditions has consistent temperature distribution and is suitable for uniform drying. Overall, the proposed hybrid solar drying chamber system offers improved temperature control and uniformity for effective drying process.

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“…Besides, solar energy is clean and safe, it can be captured anywhere and provide energy where other sources cannot. It makes the environment greener and cleaner [5].…”

Section: Introductionmentioning

confidence: 99%

A Simulation Study of Hybrid Solar Drying Chamber for Agriculture Product

Wong Kar Hao,

Mohd Afzanizam Mohd Rosli,

Jayaprakash Ponnaiyan

et al. 2024

CFDL

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“…Applying solar technologies is one of the ways to facing global warming since they are causing no greenhouse gases emission [1,2]. Parabolic trough collector system (PTC) can be used to this purpose.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Effect of Using CuO-Water Nanofluid as a Heat Transfer Fluid on the Performance of the Parabolic Trough Solar Collector

Fayadh

Khalil

Dawood

2023

CFDL

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This research displays a numerical study of the effect of CuO-water nanofluid, as heat transfer fluid in compare with the use of pure water, on the performance of a parabolic trough solar collector. The numerical model was implemented by applying the energy balances of the heat collection element (HCE) of a parabolic solar collector in one dimension. The efficiency and the heat losses were calculated, once with pure water and once more with CuO-water nanofluid as a heat transfer fluid (HTF) at different CuO nanoparticles concentrations. The flow rate, ambient temperature, solar radiation, and wind speed were constant. The copper oxide nanoparticle concentrations used in the model were 1%, 3% and 5% of the HTF volume. Numerical results indicate that the using of CuO nanoparticles in suspension with water result in enhancing the efficiency by about 0.444%, 1.26% and 2% in average, and the heat losses have been decreased to about 4.44%, 12.6% and 20% in average at CuO concentrations of 1%, 3% and 5% respectively. The results are also showed that the performance enhancement factor (PEF) of the solar collector was improved by about 13.26% at a concentration of 5%

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“…The findings revealed that the suggested design had the greatest thermal efficiency, at 93 % as opposed to 70 % for standard solar air collectors. Phu and Luan [6] have reported on the properties of thermohydraulic and the effectiveness of the coarse geometry of solar air collector tubes.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis on the thermal performance of the aluminium absorber

Linn,

Min Swe,

Soe

et al. 2023

tribomat

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The absorber is a vital part of a solar air collector and has a significant impact on the overall efficiency of a solar air heating unit. The objective of this research is to examine and compare the performance of two distinct aluminium absorbers with and without aluminium fins by using experimental and numerical (computational fluid dynamics – CFD) methods. The studies were conducted in Mandalay, Myanmar, which is located at latitude 21.98° N and longitude 96.1° E, during December 2022. A plate absorber solar air collector (PASAC) and finned absorber solar air collector (FASAC) with the same absorber area of 0.889 m2 are compared in terms of their thermal performance. At a mass flow rate of 0.0389 kg/s, the average thermal efficiency, as computed numerically, is 53.5 % for FASAC, and the experimental results show a thermal efficiency of 54.2 %. Similarly, for PASAC, the numerical computation yields an average thermal efficiency of 44.4 %, while the experimental results indicate a thermal efficiency of 47.3 %. The FASAC outperforms PASAC in terms of thermal performance. The improved thermal performance of the double-pass solar air collectors with aluminium-finned absorbers can be advantageous for employment as a drying process unit.

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A Review of Energy and Exergy Analyses of a Roughened Solar Air Heater

Cited by 19 publications

References 34 publications

A Simulation Study of Hybrid Solar Drying Chamber for Agriculture Product

A Simulation Study of Hybrid Solar Drying Chamber for Agriculture Product

Numerical Study on the Effect of Using CuO-Water Nanofluid as a Heat Transfer Fluid on the Performance of the Parabolic Trough Solar Collector

Experimental and numerical analysis on the thermal performance of the aluminium absorber

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