Performance improvement and advancement studies of mixed-mode solar thermal dryers: a review

Mehta, Pranav; Bhatt, Nilesh; Bassan, Gurmitsingh; Kabeel, A.E.

doi:10.1007/s11356-022-21736-3

Cited by 14 publications

(3 citation statements)

References 87 publications

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“…Comparative energy-exergy and economic-environmental analyses of recently advanced solar photovoltaic and photovoltaic thermal hybrid dryers: a review 2022 [219] Performance improvement and advancement studies of mixed-mode solar thermal dryers: a review 2022 [220] A review study on recent advances in solar drying: Mechanisms, challenges and perspectives 2022 [221] Solar drying of fruits-A comprehensive review 2022 [222] A review of industrial food processing using solar dryers with heat storage systems 2023 [130] Thermal energy storage systems applied to solar dryers: Classification, performance and numerical modelling: An updated review 2023 [127] Designs, Performance and Economic Feasibility of Domestic Solar Dryers 2023 [92] Assessing the suitability of solar dryers applied to wastewater plants: A review 2023 [223] Performance enhancement techniques for indirect mode solar dryer: A review 2023 [224] A review on the latest developments in solar dryer technologies for food drying process 2023 [225] Progressive review of solar drying studies of agricultural products with exergoeconomics and econo-market participation aspect 2023 [226] A review of solar drying technology for agricultural produce 2023 [227] A review of the inflated solar dryer for improving the quality of agricultural product 2023 [228] Photovoltaic-thermal systems applications as dryer for agriculture sector: A review 2023 [229]…”

Section: Title Yearmentioning

confidence: 99%

A Review on Solar Drying Devices: Heat Transfer, Air Movement and Type of Chambers

Fernandes,

Tavares

2024

Solar

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Food waste is one of the biggest challenges we are facing nowadays. According to the Food and Agriculture Organization (FAO) of the United Nations, approximately one-third of all food produced in the world is lost at some stage between production and consumption, totaling 930 million tons of food per year. Meanwhile, 10.5% of humanity suffers from malnutrition, 26% are overweight and greenhouse gases derived from the food industry account for between 25 and 30% of total emissions (8 to 10% referring to food waste), exacerbating the current climate crisis. To address these concerns, there has been a growing inclination to seek alternatives to fossil fuels, including the adoption of solar energy across diverse sectors, including the food industry. Actions are needed in order to change these patterns. This review article aims to provide an overview of recent developments in the field of solar food dehydration and the types of dehydrators that have emerged. Extensive research and bibliographic analysis, including other review articles, have revealed a growing focus on investment in this area to develop solar dehydrators that are increasingly effective but as sustainable as possible.

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Section: Title Yearmentioning

confidence: 99%

A Review on Solar Drying Devices: Heat Transfer, Air Movement and Type of Chambers

Fernandes,

Tavares

2024

Solar

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“…Phase change materials are used to store latent heat during phase shifts at a controlled temperature within a certain range [24]. Low-cost, non-corrosive, and chemically stable below 500 • C, paraffin melts with a small volume difference [25]. As a thermal energy storage structure, PCMs like paraffin wax may sustain a greater temperature than the surrounding area for at least five hours following active sunlight hours, which reduces the absolute drying time of the crops [26].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Property Comparison of Geopolymer Brick Dried by Electrical and Passive Solar Devices with Phase Change Material (Paraffin Wax)

Ashok Kumar,

Muthuvel,

Issac Selvaraj

et al. 2023

Processes

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In geopolymer bricks (GPBs), fly ash content, which is waste from power plants, is converted into bricks by chemical treatment. GPBs can be dried by using appropriate curing methods. Conventionally, electric oven curing is one of the prominent methods. Using a solar dryer instead of an electric oven provides the added advantage of saving high-grade electrical energy. So, in this work, a solar dryer with the phase change material (PCM) paraffin wax and without a PCM is used for curing applications. GPBs gain an added advantage when compared to conventional bricks like cement and sand bricks in terms of strength. A GPB has been taken as a specimen for comparing the compressive strength, tensile split strength, and flexural strength of electrical-energy-based curing and solar-energy-based curing. It has been experimentally observed that solar-energy-based curing with and without a PCM exhibits higher compressive strength, higher tensile split strength, and flexural strength when compared to electrical-energy-based curing. Solar curing with a PCM shows higher compressive strength, higher tensile split strength, and higher flexural strength when compared to solar curing without a PCM. Open solar curing is a traditional technique, but nowadays, aggressive climatic conditions can lead to severe damage to geopolymers. The novelty of this work is the study of the effect of PCMs like paraffin wax in solar drying on the curing time and the mechanical properties of GPBs.

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“…Montero y Rozas, 2019): (4) Donde: TS = Tasa de secado (% CH día -1 ) = Variación de contenido de humedad (%) = Tiempo entre cada medición (día)Curva de secado para evaluar el secado solar de culmosEl contenido de humedad (CH, %) y el tiempo de secado (t, horas) registrados en las muestras fueron las variables que se utilizaron para generar la curva que caracteriza el proceso de secado solar de culmos en el área de estudio. Un análisis previo que consistió en evaluar el ajuste de diferentes formas de modelos exponenciales referidos porMehta et al (2022) yRezaei et al (2022), condujo a seleccionar el modelo cuya estructura matemática se muestra en la Ecuación (5).…”

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Evaluación del proceso de secado solar de los culmos de Guadua aculeata Rupr. ex E. Fourn.

Tamarit-Urias

Olguín

Ordóñez-Prado

et al. 2023

RMCF

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El contenido de humedad de los culmos de bambú recién cosechados es de alrededor de 100 %, el cual se considera alto, por lo que debe reducirse mediante algún proceso de secado. Un paso clave en el procesamiento de los culmos es el secado, que ha sido poco valorado por los productores y usuarios de bambú. La exposición al aire libre es el método más utilizado en México, pero poco eficiente, ya que tarda desde semanas hasta varios meses en función de las condiciones ambientales. El objetivo del presente estudio fue evaluar el secado de secciones de culmos (6 m de longitud) de Guadua aculeata en un secador solar tipo túnel, con forma de prisma rectangular. El contenido de humedad inicial promedio fue de 106.72 %, en 80 días se alcanzó un contenido de humedad final promedio de 29.84 %. La tasa de secado fue superior a 1.0 % por día durante los primeros 20 días, lapso en el cual redujeron aproximadamente 40 % de su contenido de humedad. En los siguientes 60 días, perdieron en promedio 37.41 % de humedad a una tasa de secado variable para cada culmo muestra. La curva de secado del método evaluado corresponde a una función exponencial. Bajo las condiciones experimentales de secado se determinó que las secciones de culmos de 6 m de longitud y diámetro promedio de 12.42 cm, pueden alcanzar un CH promedio menor a 18 % en un tiempo de 109 días, para posteriormente usarse como elementos estructurales.

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Performance improvement and advancement studies of mixed-mode solar thermal dryers: a review

Cited by 14 publications

References 87 publications

A Review on Solar Drying Devices: Heat Transfer, Air Movement and Type of Chambers

A Review on Solar Drying Devices: Heat Transfer, Air Movement and Type of Chambers

Mechanical Property Comparison of Geopolymer Brick Dried by Electrical and Passive Solar Devices with Phase Change Material (Paraffin Wax)

Evaluación del proceso de secado solar de los culmos de Guadua aculeata Rupr. ex E. Fourn.

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