A Comparison of Temperature for Parabola and Sinusoidal Greenhouse Solar Dryer by CFD

Srichat, Aphichat; Vengsungnle, Ponthep; Hongtong, K; Kaewka, Weeraphon; Jongpluempiti, Jarinee

doi:10.1088/1757-899x/501/1/012006

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…For this specific case the standard kmodel was used, which is composed of an equation for dissipation rate (Equation ( 5)) and another equation for turbulent kinetic energy (Equation ( 6)) [23,24]. This model of turbulence has been successfully used in similar works to the one developed in this research [25].…”

Section: Numerical Modelmentioning

confidence: 99%

Thermo-Environmental Performance of Four Different Shapes of Solar Greenhouse Dryer with Free Convection Operating Principle and No Load on Product

Villagrán

Henao-Rojas

Franco

2021

Fluids

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Solar drying using greenhouse dryers is a viable method from the technical, economic, and environmental perspectives, allowing the drying of agricultural products for conservation purposes in different regions of the world. In Colombia, the drying of aromatic plants such as mint (Mentha spicata) is usually done directly and in open fields, which exposes the product to contamination and loss of quality. Therefore, the objective of this research was to use a three-dimensional computational fluid dynamics (CFD-3D) model previously successfully validated and implemented in this work to study the performance of air flow patterns, temperature, and humidity inside four greenhouse-type dryers contemplated for a region with hot and humid climatic conditions. The results found allowed us to observe that the spatial distribution of temperature and relative humidity are related to the air flows generated inside each dryer, therefore, there were differences of up to 7.91 °C and 23.81% for the same evaluated scenario. The study also allowed us to conclude that the CFD methodology is an agile and precise tool that allows us to evaluate prototypes that have not been built to real scale, which allows us to generate useful information for decision-making regarding the best prototype to build under a specific climate condition.

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Section: Numerical Modelmentioning

confidence: 99%

Thermo-Environmental Performance of Four Different Shapes of Solar Greenhouse Dryer with Free Convection Operating Principle and No Load on Product

Villagrán

Henao-Rojas

Franco

2021

Fluids

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“…In conclusion [51] showed that the Arc shape had the lowest consumption from a heating point of view. [52] while using CFD studied the thermal efficiency of two shapes; parabola and sinusoidal. The study used both shapes of length 8.2 m and wide 6.0 m, with the surface area being the only variation.…”

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confidence: 99%

Optimizing Solar Drying: A Critical Review of Shapes, Orientation, and Future Prospects for Hybrid Solar Dryers

Zziwa,

Okello,

Kabenge

et al. 2023

JPEE

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This comprehensive review focuses on the performance of solar dryers, with a specific emphasis on their structural shape and orientation. Researchers have extensively examined these design parameters, often employing Computational Fluid Dynamics (CFD) to assess thermal attributes and predict temperature distribution, airflow patterns, and temperature profiles within the structures. Geographical location significantly influences solar dryer shape preferences, with the parabolic shape finding favor in tropical regions for its superior solar radiation capture and storm resistance, while even-span and Quonset shapes are popular elsewhere. Solar dryer orientation is another crucial factor, with east-west alignment consistently proving optimal due to its ability to maximize year-round solar radiation absorption and, consequently, enhance drying efficiency. Economic considerations, however, fall beyond the scope of this review, which predominantly focuses on thermal aspects. This investigation reveals diverse global preferences for solar dryer shapes and orientation, highlighting the necessity of considering geographical factors in design choices. While CFD and shape/orientation dynamics have provided valuable insights, there remains room for future research to expand into transient state simulations under various conditions, contributing to a more comprehensive understanding of solar dryer performance. Such insights promise to promote sustainable and efficient drying processes, benefitting agricultural and drying applications across the globe.

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A review on solar greenhouse dryer: Design, thermal modelling, energy, economic and environmental aspects

Srinivasan

Muthukumar

2021

Solar Energy

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A Comparison of Temperature for Parabola and Sinusoidal Greenhouse Solar Dryer by CFD

Cited by 3 publications

References 13 publications

Thermo-Environmental Performance of Four Different Shapes of Solar Greenhouse Dryer with Free Convection Operating Principle and No Load on Product

Thermo-Environmental Performance of Four Different Shapes of Solar Greenhouse Dryer with Free Convection Operating Principle and No Load on Product

Optimizing Solar Drying: A Critical Review of Shapes, Orientation, and Future Prospects for Hybrid Solar Dryers

A review on solar greenhouse dryer: Design, thermal modelling, energy, economic and environmental aspects

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