Experimental Investigation of Drying Tomato in a Double Slope Solar Dryer Under Natural Convection

Elavarasan, E.; Kumar, Yogesh; Mouresh, R.; Natarajan, Sendhil Kumar

doi:10.1007/978-981-16-2794-1_16

Cited by 5 publications

(1 citation statement)

References 15 publications

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“…Open exposure to sun drying introduces certain risk factors like a slow rate of drying time, the development of microbial activities, and the weather forecast [12]. The risk factors of open-sun drying can be eliminated by thermal power, which is free from fuel usage [13]. As thermal-based solar drying uses natural convection, it does not pose any threat to the ecosystem [14].…”

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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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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Review on solar dryers for drying fish, fruits, and vegetables

Natarajan

Elangovan

Elavarasan³

et al. 2022

Environ Sci Pollut Res

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Study of activation energy and moisture diffusivity of various dipping solutions of ivy gourd using solar dryer

Elangovan

Natarajan²

2022

Environ Sci Pollut Res

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The study is aimed to enhance the shelf life of ivy gourd through the solar drying method in open, forced and natural convection mode. Ivy gourd is treated as the primary agent to prepare medicines and the stems, leaves and owers are used to cure diseases related to diabetics, ulcer, skin. The normal shelf life is 2-3 days and it can be increased up to 6 months with an effective drying process. The experiment is intended to nd the best drying process among the open, natural and forced convection mode with an initial dipping method with ascorbic acid, lemon juice, sugar solution, honey solutions individually and a control sample (without dipping). A 3kg sample of ivy gourd is dipped in 10g/L of each of the solutions and it is used for the three drying processes individually. The obtained results are indicating that the forced convection method for ascorbic acid is best among the other drying method, with the highest moisture diffusivity is 7.88×10 − 8 m 2 /s and the lowest activation energy of 21.12 kJ/mol. It was observed that the drying kinetics of ivy gourd should be considered an indicator of e ciency for solar drying technique from an environmental safety perspective.The in uence of dipping solution and drying mechanisms on the functionalities of drying are discussed with suitable illustrations. drying method, dipping solution, operating conditions, and storage conditions. The dipping pre-treatment mainly affects the nutritional values, which is out of the scope of this paper and requires future work.

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Experimental Investigation of Drying Tomato in a Double Slope Solar Dryer Under Natural Convection

Cited by 5 publications

References 15 publications

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

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

Review on solar dryers for drying fish, fruits, and vegetables

Study of activation energy and moisture diffusivity of various dipping solutions of ivy gourd using solar dryer

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