Natural convection and direct type (NCDT) solar dryers: a review

Chavan, Anand; Vitankar, Vivek; Mujumdar, Arun S.; Thorat, Bhaskar N.

doi:10.1080/07373937.2020.1753065

Cited by 44 publications

(9 citation statements)

References 70 publications

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“…Use of solar dryers is a unique method in which solar energy is applied for drying products. Solar dryer is made by keeping lots of points in our mind (Chavan et al, 2020).Various elements are successful during the time spent planning, building, and utilizing sun-based dryers in various areas. Design used for solar heater is an important factor which plays important role in its working and result.…”

Section: Factors Influencing Solar Dryersmentioning

confidence: 99%

Solar Drying of Herbal Wealth in Eastern Himalaya: A Review

Kumar¹,

Chauhan²,

Pathania³

et al. 2022

Frontiers in Heat and Mass Transfer

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Solar dryers have proven to be one of the best environmentally friendly approaches for drying purpose of medicinal plants and agricultural crops. Use of solar radiations in drying purpose of plant parts has proven economically as well as environmentally responsible and sensible application. Plants are the treasure of nature with hidden medicinal properties to treat diseases. Plant material should be processed properly for extraction of medicinal molecules in terms drying to decrease the manufacturing loss and to increase the standard of product. Cognizances of ethnobotanical knowledge on plant wealth are extremely beneficial in utilization and exploration of natural resources. Conventionally, low drying temperatures between 30-40 °C, with economically beneficial techniques are required to protect sensitive active ingredients. Therefore, the objective of reviewing research in medicinal plant drying is to find out optimum drying temperature and best solar dryer for drying purposes of plant parts in terms of quality and drying costs. Rendering to human requisites, solar appliances for drying purposes will be used as the best alternative to standard sun-drying technique. This review focused on effective drying is demand of present scenario for the application of heat trapped from solar radiations for drying purpose in order to maintain the quality and active ingredients of plants. Conventionally, low drying temperatures between 30-40 °C, with economically beneficial techniques are required to protect sensitive active ingredients. Indirect type of solar dryers can easily fulfill all the terms for dying plant products in terms of standard and yield.

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Section: Factors Influencing Solar Dryersmentioning

confidence: 99%

Solar Drying of Herbal Wealth in Eastern Himalaya: A Review

Kumar¹,

Chauhan²,

Pathania³

et al. 2022

Frontiers in Heat and Mass Transfer

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show abstract

“…The various designs of natural convective and direct type (NCDT) of solar dryers are comprehensively reviewed by Chavan et al [10] for the most intriguing state-of-the-art of practicing of solar drying technology for the benefit of one and all. The performance evaluation of existing solar dryers was carried out based on parameters such as capital cost, design simplicity, portability, compactness, thermal performance and other equally important parameters contributing to the dried product quality attributes.…”

Section: Natural Convection and Direct Type (Ncdt) Solar Dryersmentioning

confidence: 99%

Critical reviews for facilitating innovations and advances in drying science and technology

Shirkole¹,

Thorat²,

Mujumdar³

2021

Drying Technology

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“…Several studies classify solar dryers as direct, indirect, or mixed mode, and divide them into three types: cabinet (box), greenhouse, and tent, which come in a variety of sizes, shapes, and designs, as described by (Ekka, Muthukumar, Bala, Kanaujiya, & Pakshirajan, 2021). The air movement, mode of heat transfer, and design are the most typical approaches for solar dryers, as discussed in (Bhardwaj, Kumar, Kumar, Goel, & Chauhan, 2021;Chavan, Vitankar, Mujumdar, & Thorat, 2021). The ndings should allay any fears about product quality and its economic, environmental, and societal implications.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance assessment of a passive mixed-mode solar dryer

Missana

Mashingo

2022

Preprint

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Solar energy is becoming increasingly important as an alternative energy source due to the demand for new energy and environmental concerns about reducing greenhouse gasses. Food scarcity and agricultural product loss are currently affecting the world as a result of poor drying and storage methods, which result in post-harvest losses. The developed passive mixed-mode solar dryer was tested at daytime, from 9:00 to 18:30 hours. The study focuses on the thermal evaluation of the passive mixed mode solar dryers using experimental methodologies. The solar dryer achieved a maximum air-drying temperature of 69.2°C while the flat plate solar collector achieved 68.8°C respectively. The average air-drying temperature was 50.1°C, while an ambient average temperature was 29°C. This research demonstrates that a passive mixed mode solar dryer can effectively dry food and benefiting the community.

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Natural convection and direct type (NCDT) solar dryers: a review

Cited by 44 publications

References 70 publications

Solar Drying of Herbal Wealth in Eastern Himalaya: A Review

Solar Drying of Herbal Wealth in Eastern Himalaya: A Review

Critical reviews for facilitating innovations and advances in drying science and technology

Thermal performance assessment of a passive mixed-mode solar dryer

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