Performance studies on a forced convection solar dryer integrated with a paraffin wax–based latent heat storage system

Rabha, Deva Kanta; Muthukumar, P.

doi:10.1016/j.solener.2017.04.012

Cited by 177 publications

(37 citation statements)

References 40 publications

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“…Extensive reviews on this topic can be found in [ 5 , 6 , 7 ]. Currently, phase-change materials are very popular, among which the use of paraffin wax dominates, e.g., for drying red chillies [ 8 ] or mushrooms [ 9 ]. The current research also concerns a dryer with phase-change material, which is dedicated to medicinal herbs [ 10 ] and crops [ 11 ].…”

Section: Methodsmentioning

confidence: 99%

A Granite Bed Storage for a Small Solar Dryer

Nemś

Pacyga

2018

Materials

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The article presents the concept of a high-temperature solar dryer with an internal bed storage. Granite was selected as the material for filling the bed storage, and an emphasis was put on its versatile use and favourable thermal and mechanical properties. Experimental tests were carried out for the charging process of the bed storage, which was filled with granite spheres with three different diameters. The influence of the sphere’s diameter on the charging and discharging process of the bed storage was analysed. The results of the experiment allowed a conclusion to be drawn that the use of a granite storage bed could prolong the operation of the considered dryer by two hours.

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Section: Methodsmentioning

confidence: 99%

A Granite Bed Storage for a Small Solar Dryer

Nemś

Pacyga

2018

Materials

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“…The exergy efficiency can be written based on the Second Law of Thermodynamics as the ratio of the absorbed exergy of air divided by the exergy of solar radiation on the collector [28,29]:…”

Section: Ofmentioning

confidence: 99%

Energy and Exergy Analysis of a Flat-Plate Solar Air Heater Artificially Roughened and Coated with a Novel Solar Selective Coating

et al. 2020

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Enhancements in heat transfer, and consequently the thermohydraulic performance of solar air heaters (SAHs), are necessary to widen and optimize their use in many applications such as solar drying or heating buildings. In this investigation, two techniques were used. A novel solar selective coating combined with broken arc ribs roughness was employed with a SAH and the evaluation of the energetic and exergetic performance was applied under four airflow working conditions compared to a smooth absorber SAH coated with the same coating. The results revealed that the Nusselt number of roughened SAH with the new coating exhibited a notable improvement compared to a smooth absorber SAH and a roughened SAH without a coating. Furthermore, the thermal efficiency increased with the increase in the air flow rate and the maximum rise was 18.8% compared to a smooth SAH. The highest increase in exergy was 51.6% with minimum values of exergy destruction and improvement potentials. In brief, the roughened SAH with 4% CNTs/CuO-black paint under the airflow rate of 0.0244 m3/s (condition C) exhibited the best energetic and exergetic performance.

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“…In the literature there are many studies that study this form of drying agricultural products, in which paraffin is the most applied PCM (BAHARI et al, 2020;LAKSHMI et al, 2018;AGARWAL and SARVIYA, 2017;RABHA and MUTHUKUMAR, 2017). Although there are many recent studies on the use of paraffin as MMF in drying, rare are those that apply in Brazilian regions.…”

Section: Introductionmentioning

confidence: 99%