Effect of pretreatments on drying of red dacca in a single slope solar dryer

Elangovan, Elavarasan; Natarajan, Sendhil Kumar

doi:10.1111/jfpe.13823

Cited by 12 publications

(8 citation statements)

References 49 publications

(38 reference statements)

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“…The average solar radiation and ambient temperature were recorded as 794.18 W/m 2 and 34.33°C, with the maximum solar radiation and atmospheric temperature being 1002.03 W/m 2 and 36.75°C at 11 a.m., respectively. A similar trend was observed by Gatea, 44 Elavarasan et al, 45,46 Elavarasan and sendhil 47 …”

Section: Resultssupporting

confidence: 84%

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Physicochemical characteristics of dried ivy gourd in a single slope solar dryer

Elangovan

Natarajan²

2022

Env Prog and Sustain Energy

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Ivy gourd with a good amount of potassium (K) and calcium (Ca) offers greater benefit to human health. Studying the drying mechanism of fresh ivy gourd is very important for subsequent processes and the quality of the product. The present study is intended to perform a mineral analysis (K and Ca), ash content and color parameter (L*, a*, b*, C*, H*, and whiteness and yellowness index) of solar‐dried ivy gourd. Drying experiments are performed in a single slope solar dryer and open sun drying. During the drying process, the temperature of the dryer is maintained from 45 to 75°C, undergoing forced convection drying (air velocity of 1 m/s). Fresh and dried ivy gourd samples had high amounts of Ca (379.26–4992.24 mg/kg) and K (330.63–14690.24 mg/kg). The highest mineral values were determined in the ivy gourd samples dried inside a forced convection solar dryer. Open sun (L*43.29, a*−0.57, b*16.78, C*16.78, h*88.05), natural convection (L*41.74, a*−1.74, b*15.82, C*15.98, h*83.54) and forced convection (L*41.72, a*−2.02, b*15.81, C*15.94, h*82.72) revealed better color values in the dried ivy gourd samples. The moisture is reduced from 93.5% to 10% wet basis in the natural and forced convection solar dryer within 9 and 6 h, whereas it took 10 h under open sun drying. Forced convection solar dryer dried the ivy gourd sample in a minimal time with better mineral retention and color parameter values when compared to natural and open sun‐dried samples.

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Section: Resultssupporting

confidence: 84%

“…[40][41][42][43] From, Figure 3 44 Elavarasan et al, 45,46 Elavarasan and sendhil. 47 From Table 2, it is observed that the Ash content is highest for forced convection drying (6.21 g/100 gm), followed by natural con-…”

Section: Resultsmentioning

confidence: 97%

Physicochemical characteristics of dried ivy gourd in a single slope solar dryer

Elangovan

Natarajan²

2022

Env Prog and Sustain Energy

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“…Advances in Materials Science and Engineering (2) Te amount of water content (W) removed [21][22][23][24] (3) Instantaneous moisture content Mt is calculated for time 't'…”

Section: Energy and Exergy Analysismentioning

confidence: 99%

Performance of Polymer Composite Constituted Cabinet Dryer Integrated within a Solar Flat Plate Collector

Raj

Kuzmin

Krishnakumar³

et al. 2023

Advances in Materials Science and Engineering

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Generally, solar dryer cabinets are made up of sheet metals that are heavy, costly, tend to rust over time, and possess the high heat rate to the outer atmosphere. In order to overcome these drawbacks, this research urges to develop a natural fiber reinforced polymer-based cabinet dryer, specially designed and fabricated for the purpose of solar drying. Nylon is used as the matrix material and Prosopis juliflora in particulate form is used as the natural fiber reinforcement. The dryer cabinet was designed at industrial scale to dry 5 kg of ginger at a single setting. This work also studies the efficiency of the polymer composite cabinet integrated with a flat plate solar collector system that is coated with copper and black chrome attached to corrugated fins in between the absorber plate and storage medium. The FRP chamber was compartmented in its interior with aluminium perforated sheets and experimentation was performed to determine the efficiency of the composite cabinet based on reduction of heat loss from the system. The performance of the coating, storage medium materials, and overall storage efficiency were also studied. The FRP cabinet resulted in a moisture level less than 8.5% within 4–7 days. Exergy studies showed 75% efficiency and energy studies gave 25.5 kJ/kg peak readings of drying efficiency for a period ranging between 11 and 12 hours. This was a 75% increment in energy efficiency. Thermal degradation of the FRP material was found to be stable up to 300°C. The overall weight of the constructed polymer cabinet was 25% lesser than the conventional systems.

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“…The drying process is playing an important role in heatsensitive product dehydration. Solar drying is a better choice to reduce the loss and produce good quality red dacca after harvesting (Elangovan and Natarajan, 2021). The dehydrated fruits are high in a range of dietary fibers and other bioactive compounds with prebiotic effects (e.g.…”

Section: Introductionmentioning

confidence: 99%

Response of Black (Morus nigra), White and White Shahtoot (Morus alba) Mulberry Fruits to Ascorbic Acid Treatment and Drying Methods

Hama

Aljabary

Othman

et al. 2022

DASJ

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The drying process plays an important role in heat-sensitive product dehydration. This study was conducted to evaluate the response of three species of mulberry fruit (Morus nigra L. (Black mulberry), Morus alba L. (White mulberry), and Morus alba L. (White shahtoot) grown in Halabja, Kurdistan region, Iraq. Four levels of ascorbic acid treatment at 0%, 10%, 20% and 30% lthen, divided into two groups; the first dried under solar radiation the second dried by one of the very high-quality machines (oven) for drying all kinds of vegetables and fruits. The mulberry fruits were harvested at the ripening stage by hand in April 2021 from the trees 10 years old. The results appeared that black mulberry is significantly superior that has higher moisture and total sugars content while having the lowest ash content and polyphenol oxidase activity on the two other species. Additionally, the ascorbic acid treatment significantly decreased total sugars content and peroxidase activity, while significantly increasing moisture content and polyphenol oxidase activity in fruits as compared to untreated fruits. Furthermore, sun drying significantly increased the fruits content of moisture, ash, total sugars, and polyphenol oxidase activity as compared to oven drying.

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Effect of pretreatments on drying of red dacca in a single slope solar dryer

Cited by 12 publications

References 49 publications

Physicochemical characteristics of dried ivy gourd in a single slope solar dryer

Physicochemical characteristics of dried ivy gourd in a single slope solar dryer

Performance of Polymer Composite Constituted Cabinet Dryer Integrated within a Solar Flat Plate Collector

Response of Black (Morus nigra), White and White Shahtoot (Morus alba) Mulberry Fruits to Ascorbic Acid Treatment and Drying Methods

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