Experimental Investigation of Drying Cucumber in a Double Slope Solar Dryer Under Natural Convection and Open Sun Drying

2021 ◽  
pp. 41-52
Author(s):  
E. Elavarasan ◽  
Sendhil Kumar Natarajan ◽  
Anagh S. Bhanu ◽  
A. Anandu ◽  
M. H. Senin
Keyword(s):  
Experimental Investigation ◽  
Natural Convection ◽  
Sun Drying ◽  
Solar Dryer

scholarly journals Effects of Blanching and Natural Convection Solar Drying on Quality Characteristics of Red Pepper (Capsicum annuum L.)

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
James Owusu-Kwarteng ◽  
Francis K. K. Kori ◽  
Fortune Akabanda
Keyword(s):  
Natural Convection ◽  
Quality Characteristics ◽  
Red Pepper ◽  
Plain Water ◽  
Drying Methods ◽  
Solar Drying ◽  
Drying Time ◽  
Sun Drying ◽  
Overall Acceptability ◽  
Solar Dryer

The objective of this work was to determine the effects of blanching and two drying methods, open-sun drying and natural convection solar drying, on the quality characteristics of red pepper. A 2 × 3 factorial design with experimental factors as 2 drying methods (open-sun drying and use of solar dryer) and 3 levels of pepper blanching (unblanched, blanched in plain water, and blanched in 2% NaCl) was conducted. Dried pepper samples were analysed for chemical composition, microbial load, and consumer sensory acceptability. Blanching of pepper in 2% NaCl solution followed by drying in a natural convection solar dryer reduced drying time by 15 hours. Similarly, a combination of blanching and drying in the solar dryer improved microbial quality of dried pepper. However, blanching and drying processes resulted in reduction in nutrients such as vitamin C and minerals content of pepper. Blanching followed by drying in natural convection solar dryer had the highest consumer acceptability scores for colour and overall acceptability, while texture and aroma were not significantly (p>0.05) affected by the different treatments. Therefore, natural convection solar dryer can be used to dry pepper with acceptable microbial and sensory qualities, as an alternative to open-sun drying.

Experimental Investigation of Active Solar Dryer for Drying of Chili

2014 ◽  
Vol 953-954 ◽  
pp. 16-19 ◽  
Author(s):  
Yuttachai Keawsuntia
Keyword(s):  
Experimental Investigation ◽  
Solar Collector ◽  
Agricultural Product ◽  
Drying Time ◽  
Sun Drying ◽  
Hot Air ◽  
Solar Dryer ◽  
Drying Chamber ◽  
Better Than

This research paper presents the experimental results of drying of chili by using the active solar dryer and sun drying because of chili is a commercial agricultural product of Thailand. The active solar dryer consisted of a solar collector, a drying chamber and a chimney. The small fans were installed in the solar collector of active solar dryer to provide the air flow circulated in the solar collector and a drying chamber. Drying of chili of 20 kg from moisture content 84 percent wet basis to 10 percent wet basis following the Thai Agricultural Standard (TAS 3001-2010) showed that the use of the active solar dryer to make the drying time reduced about 28.7 percent compared with sun drying because of the hot air temperature inside the drying chamber higher than the ambient temperature about 10 to 15 . The quality of dried chili from the active solar dryer better than dried chili from sun drying.

scholarly journals Experimental Studies on Natural Convection Open and Closed Solar Drying Using External Reflector

2021 ◽  
Author(s):  
Abd Elnaby Kabeel ◽  
Paul Durai Leon Dharmadurai ◽  
Sathiyaseelan Vasanthaseelan ◽  
Prof. Dr. Ravishankar Sathyamurthy ◽  
Bharathwaaj Ramani ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Natural Convection ◽  
Removal Rate ◽  
Experimental Studies ◽  
Heat Energy ◽  
Moisture Removal ◽  
Solar Drying ◽  
Solar Dryer ◽  
Drying Efficiency ◽  
Food Dryer

Abstract This work presents the experimental investigation on a solar food dryer equipped with external reflectors to enhance the rate of drying efficiency by removing the moisture content available in the anchovy fish. A comparison on conventional open solar drying is carried out to assess the parameters such as drying efficiency, moisture removal rate, and heat energy required for drying the anchovy fish using the modified solar dryer using natural convection technique. The physical examination results on the dried products proved that using modified solar dryer, the dried product are free from insects, dust. Also, it is found that the loss of colour from the product is minimum while compared to conventional open solar drying. The results showed that the thermal efficiency of dryer 1 and dryer 2 are comparatively higher as compared to that of conventional open solar drying and found as 16.73 and 19.34 % respectively.

Experimental investigation of an indirect type natural convection solar dryer

2002 ◽  
Vol 43 (16) ◽  
pp. 2251-2266 ◽  
Author(s):  
A.A El-Sebaii ◽  
S Aboul-Enein ◽  
M.R.I Ramadan ◽  
H.G El-Gohary
Keyword(s):  
Experimental Investigation ◽  
Natural Convection ◽  
Solar Dryer

EXPERIMENTAL INVESTIGATION OF NATURAL CONVECTION FROM POROUS BLOCKS IN A CAVITY

2016 ◽  
Vol 19 (12) ◽  
pp. 1023-1032 ◽  
Author(s):  
Ayla Dogan ◽  
O. Ozbalci ◽  
I. Atmaca
Keyword(s):  
Experimental Investigation ◽  
Natural Convection ◽  
Porous Blocks
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