Thermal behavior of indirect solar dryer: Nocturnal usage of solar air collector with PCM

Khadraoui, Aymen El; Bouadila, Salwa; Kooli, Sami; Farhat, Abdelhamid; Guizani, Amenallah

doi:10.1016/j.jclepro.2017.01.149

Cited by 199 publications

(49 citation statements)

References 23 publications

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“…The air collector can be inclined to receive maximum solar radiation for the particular time of year when dried crop is harvested. A wide variety of phase change and sensible thermal energy storage has been employed with solar dryers (Kant et al, 2016;El Khadraoui et al, 2017b) with a particular emphasis on the use of rock beds (Jain and Jain, 2004;Sharma et al, 1991;Tiwari et al, 1994;Madhlopa and Ngwalo, 2007, and water. Many autonomous solar dryers have no auxiliary heating as thermal mass provides shortterm heat storage to enable drying to continue in intermittently, cloudy or inclement weather (Condori et al, 2017 Ayua et al, in press).…”

Section: Indirect Passive Solar Dryersmentioning

confidence: 99%

Solar dryers for tropical food preservation: Thermophysics of crops, systems and components

Tomar

Tiwari

Norton³

2017

Solar Energy

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Drying reduces the moisture content of harvested crops thus slowing decay processes to enable longerterm storage. Solar dryers contain the crop being dried, to enhance solar energy collection incurring lower crop losses than are associated with open-sun drying and recurrent costs than are inherent to uses of fossil-fuels for drying. The influences of key environmental, operational and design parameters for solar dryers are discussed including: (i) psychrometry of drying processes and ambient conditions, (ii) how initial crop properties are converted to final desired product attributes, (iii) feasibility of using powered components such as fans and (iv) air-heating solar collector selection.

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Section: Indirect Passive Solar Dryersmentioning

confidence: 99%

Solar dryers for tropical food preservation: Thermophysics of crops, systems and components

Tomar

Tiwari

Norton³

2017

Solar Energy

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“…Paraffin was reported to be suitable PCM in the above temperature range for solar applications by many researchers [9,10]. Khadraoui et al [11] studied the effect of solar energy accumulator in a solar dryer at night hours using paraffin as phase change material. Solar energy accumulator reached 33.9% energy efficiency and also maintains temperature of drying chamber 4-16 °C higher than the ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Selection of phase change material for solar thermal storage application: a comparative study

Babar

Arora

Nema

2019

J Braz. Soc. Mech. Sci. Eng.

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The study of five paraffin waxes and wood resin was carried out to investigate their thermo-physical properties. The investigation aimed at selection of a phase change material (PCM), for its potential use as a thermal energy reservoir (TER) in a fabricated solar dryer. Differential scanning calorimeter was used to determine the melting point, solidification point, latent heat of fusion and solidification of these PCM. The T-history analysis was carried out to determine the effective thermal conductivity and specific heat in liquid and solid states. Bulk density of these PCMs was determined using standard pycnometer method. A comparative analysis was done for the selection, and PW 1 was selected among the paraffin waxes, while wood resin was rejected. The selected PCM was used in the flat plate collector of solar dryer to identify the thermal zones and to validate its capability as a TER. Maximum temperature achieved at outlet of flat plate collector was 50 °C. The temperature profile built in different zones was determined with and without using PCM. It was found that after 18:00 IST evening, the average flat plate collector chamber temperature with PCM PW 1 was found to be 23.5% higher than that without using PCM.

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“…Aymen El Khadraoui et al performed experiment on solar dryer with phase change material as paraffin wax of 60 kg which was filled into the aluminium cavity below absorber plate. The drying chamber was insulated with polyurethane of 0.03m thickness and the result showed that he relative humidity inside the drying chamber was in between 15.88 to 66.7% for the case with phase change material and in between 16.14 to 78.6% for the case without phase change material it was also concluded that Use of the phase change material decreased the consumption of electricity between 40 and 70% [18]. Ramin Moradia et al built and tested a double glazed SAH (Solar active house) in which paraffin wax was used as a phase change material the setup.…”

Section: B Indirect Solar Dryer With Phase Change Materialsmentioning

confidence: 99%

Indirect Solar Dryer: A Review

Dube¹

2018

IJRASET

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Various agricultural products such as Fruits, Vegetables, Grains, and medicinal Herbs etc. requires drying to make them available for long period of time. Usually the methods being used for preservation of these products requires fossil fuel and open sun drying which has its own disadvantages. In developing countries fossil fuel availability still remains a big issue therefore solar drying can be a viable alternate solution for fossil fuels. Also the solar drying technique is not only dependent on solar energy for its functioning, rather its performance can be enhanced by incorporating various systems and techniques. In this paper various types of indirect solar drying techniques have been reviewed and emphasis is given to the dryers integrated with latent heat storage unit. Design and Analysis of Indirect solar dryer used for miscellaneous applications such as water heating, space heating and other industrial purposes have been presented in this paper.

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Thermal behavior of indirect solar dryer: Nocturnal usage of solar air collector with PCM

Cited by 199 publications

References 23 publications

Solar dryers for tropical food preservation: Thermophysics of crops, systems and components

Solar dryers for tropical food preservation: Thermophysics of crops, systems and components

Selection of phase change material for solar thermal storage application: a comparative study

Indirect Solar Dryer: A Review

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