Advanced technologies and performance investigations of solar dryers: A review

Kumar, Pradeep; Singh, Dheerandra

doi:10.1016/j.ref.2020.10.003

Cited by 37 publications

(15 citation statements)

References 45 publications

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“…Solar-energy-utilized dryers are classified into direct-type, indirect-type, and mixed-mode solar dryers [2] [21]. They are also classified according to how the product receives and utilizes heat, namely active and passive solar-energy drying systems [22].…”

Section: Different Types Of Solar Dryersmentioning

confidence: 99%

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A review of the inflated solar dryer for improving the quality of agricultural product

Maryana¹,

Saputra

Priyanto

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from a solid, semi-solid or liquid. This processing technique can be used to preserve agricultural products. Insufficient drying techniques may result in a progressively worse standard of the product. A number of different sources of energy are commonly utilized in drying processes such as fuel or biomass. The shortage of fossil fuels and expensive processes may damage the environment; consequently, solar-energy-utilized dryers become the main choice for drying agricultural crops. The inflated solar-energy-utilized dryers were used to dry agricultural crops because the design was simple and easy to operate and maintain, and the dryers prevented excessive heat on the top layer of the exposed object to the sun’s rays. In addition, they could be installed in new locations in a very short time. This study aimed to review in depth the inflated solar-energy-utilized dryers and found out their advantages. What’s more, it paid particular attention to providing a comprehensive description of the design of inflated solar-energy-utilized dryers and their application to a variety of different agricultural commodities. The results of the study showed that the inflated solar-energy-utilized dryers were both faster for drying and improved the product quality regarding the aflatoxin level and impurities.

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Section: Different Types Of Solar Dryersmentioning

confidence: 99%

“…A direct solar dryer uses solar radiation that passes through the glass cover to dry agricultural products. It is classified into open sun drying and cabinet-type solar dryers [21]. This type is very simple in design consisting of a box made of wood with a glass cover and a small hole for air to get in and out (Figure 2).…”

Section: Types Of Direct Solar Dryermentioning

confidence: 99%

A review of the inflated solar dryer for improving the quality of agricultural product

Maryana¹,

Saputra

Priyanto

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Walau bagaimanapun, kajian berkaitan reka bentuk sistem pengering suria yang bersifat kendiri, mudah alih dan senang diselenggara masih kurang dibangunkan [13,14]. Oleh itu, objektif utama kajian ini dijalankan adalah untuk membangunkan dan menilai prestasi sistem pengering suria hibrid PV/T berasaskan udara yang inovatif dan sesuai digunakan untuk pengeringan hasil pertanian dan perikanan.…”

Section: Pengenalanunclassified

Development and Performance of a Solar Dryer Hybrid Photovoltaic Thermal System

Azmi

Majid²,

Ruslan³

2022

Jurnal Teknologi

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A solar dryer hybrid photovoltaic thermal (PV/T) system has been designed, built and its performance has been studied. This research aims to develop a stand-alone solar dyer system, portable and less maintenance. This system consists of three main parts; PV/T system with configuration-Z thermal absorber plate, multi-direction solar collector with cross absorber plate and drying chamber. Solar thermal collector which was designed in the system is called a multi-direction solar collector because the solar radiation does not get the heat through the upper part but also on the lower sides. This situation will then increase the amount of heat that will absorb by the absorber plate. The cross absorber plate will be used in a multi-direction solar collector because it can be assembled row by row. Six sets of cross absorber plates are used in this system. PV/T airflow uses configuration-Z absorber plate which is placed under the photovoltaic (PV) module. The amount of heat produced from the PV/T configuration-Z is used as the pre-heat before the hot air flows to the multi-direction solar collector. While electric energy from PV is used to operate the ventilation fan. The solar dryer hybrid PV/T system tested its effectiveness in the field under the daily solar radiation. The total efficiency generated from PV/T configuration-Z system is in the range of 35% to 52%. For the multi-direction solar collector system, the output range was generated between 32.0 °C to 46.6 °C, whereas the thermal efficiency is in the range of 50% to 70%.

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“…Several countries have started to concentrate efforts to expand the use of solar energy in various sectors to reduce the use of fossil fuels (Chen et al, 2019;Pelda et al, 2020;Lipińskia et al, 2021). In the agricultural sector, solar energy makes it possible to perform drying with a dryer that has low costs of installation and maintenance, in a clean way, with no risk of contaminating the environment and agricultural products (Kumar & Singh, 2020;Paes et al, 2020;Nukulwar & Tungikar, 2020). In order to improve the solar drying of agricultural products, it is necessary to invest in technology that use sustainable production processes associated with automation, seeking to follow the Industry 4.0 and Internet of Things (Wortmann & Flüchter, 2015;Enyoghasi & Badurdeen, 2021).…”

Section: Introductionmentioning

confidence: 99%

Automation of monitoring of drying parameters in hybrid solar-electric dryer for agricultural products

Paes

Ramos

Oliveira

et al. 2022

Rev. bras. eng. agríc. ambient.

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Increasing the efficiency of solar dryers with ensuring that the system remains accessible to all users can be achieved with their automation through low-cost and easy-to-use technique sensors. The objective was to develop, implement and evaluate an automatic system for monitoring drying parameters in a hybrid solar-electric dryer (HSED). Initially, an automated data acquisition system for collecting the parameters of sample mass, air temperature, and relative air humidity was developed and installed. The automatic mass data acquisition system was calibrated in the hybrid solar-electric dryer. The automated system was validated by comparing it with conventional devices for measuring the parameters under study. The data obtained were subjected to analysis of variance, Tukey test and linear regression at p ≤ 0.05. The system to turn on/off the exhaust worked efficiently, helping to reduce the errors related to the mass measurement. The GERAR Mobile App showed easy to be used since it has intuitive icons and compatibility with the most used operating systems for mobile devices. The responses in communication via Bluetooth were fast. The use of Arduino, a low-cost microcontroller, to automate the monitoring activity allowed estimating the mass of the product and collecting the drying air temperature and relative air humidity data through the DHT22. This sensor showed a good correlation of mass and air temperature readings between the automatic and conventional system, but low correlation for relative air humidity. In general, the automatic data acquisition system monitored in real time the parameters for drying agricultural products in the HSED.

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Advanced technologies and performance investigations of solar dryers: A review

Cited by 37 publications

References 45 publications

A review of the inflated solar dryer for improving the quality of agricultural product

A review of the inflated solar dryer for improving the quality of agricultural product

Development and Performance of a Solar Dryer Hybrid Photovoltaic Thermal System

Automation of monitoring of drying parameters in hybrid solar-electric dryer for agricultural products

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