scholarly journals Performance evaluation of a cabinet solar dryer for drying red pepper in Bangladesh

2018 ◽  
Vol 49 (2) ◽  
pp. 100-109 ◽  
Author(s):  
Muhammad Zakaria Hossain ◽  
Md Masud Alam ◽  
Md Faruq Bin Hossain ◽  
MSH Sarker ◽  
Md Abdul Awal ◽  
...  
Keyword(s):  
Average Rate ◽  
Global Radiation ◽  
Red Pepper ◽  
Solar Drying ◽  
Sun Drying ◽  
Solar Dryer ◽  
Direct Exposure ◽  
Pepper Powder ◽  
Pepper Seed

A cabinet type solar dryer was designed and fabricated over a collector and dryer area of 4.00 m2 and 7.5 m2 respectively for the geographical condition of Bangladesh. Red pepper was used to test the performance of the dryer. The upper tray and lower tray pepper drying needed 36 and 41 h to reduce moisture from 73% (wet basis) to 10% (wet basis) respectively and found 9 kg dried pepper from 30 kg fresh red ripe pepper. In contrast, open sun drying needed 85 h to reduce moisture from 73% (wet basis) to 11% (wet basis) and produced 2.43 kg dried pepper from 8 kg red ripe pepper. The average global radiation was about 133 W/m2 while the flux incidence and flux absorbed on collector was about 128 W/m2 and 103 W/m2 respectively. The average collector and dryer efficiency was about 48% and 34% respectively. The average exergy efficiency was obtained 63%. The average rate of top, bottom and side collector loss was 37 W/m2, 20 W/m2 and 3 W/m2 respectively. The upper tray, lower tray and open sun pepper seed germination was 76%, 81% and 85% respectively (P≥0.01). The redness value of lower tray pepper (a*=27.1) was higher followed by upper tray (a*=24.7) and open sun pepper powder (a*=21.1), which means direct exposure of sunlight diminishes the quality of pepper colour. The redness value of fabricated solar drying was significantly (P≤0.01) higher than that of open sun drying.

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.

scholarly journals An Experimental Study and Analysis on Solar Drying of Bitter Gourd Using an Evacuated Tube Air Collector in Thanjavur, Tamil Nadu, India

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
AR. Umayal Sundari ◽  
P. Neelamegam ◽  
C. V. Subramanian
Keyword(s):  
Moisture Content ◽  
Tamil Nadu ◽  
Research Work ◽  
Bitter Gourd ◽  
Sun Drying ◽  
Solar Dryer ◽  
Drying Rates ◽  
Evacuated Tube ◽  
Drying Chamber

The objective of this research work is to design and develop a forced convection solar dryer using evacuated tube air collector and study its performance on bitter gourd in Thanjavur District, Tamilnadu, India. The designed solar dryer consists of a drying chamber, evacuated tube air collector, a blower, and a chimney. Drying parameters, moisture ratio and drying rates, are calculated and their performance is compared with natural sun drying. The results of the present study show that the proposed solar dryer has greater efficiency, and the moisture content of bitter gourd is reduced from 91% to 6.25% in 6 hours as compared to 10 hours in natural sun drying. In this solar dryer, the products are uniformly dried, and the moisture content of the sample is controlled. It is found that the quality of the dried bitter gourd using solar dryer is higher than the natural sun-dried bitter gourd.

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 THE EFFECT OF CONVECTIVE FIXED BED DRYING BASED ON A SOLAR COLLECTOR AND PHOTOVOLTAIC (CSD) TO THE QUALITY ATRIBUTES OF RED PEPPER COMPARED WITH CONVENTIONAL CONVECTIVE FIXED BED DRYING (CCD)

2019 ◽  
Vol 7 (1) ◽  
pp. 24-33
Author(s):  
Siti Asmaniyah Mardiyani ◽  
Sumardi Hadi Sumarlan ◽  
Bambang Dwi Argo ◽  
Amin Setyo Leksono
Keyword(s):  
Ascorbic Acid ◽  
Solar Collector ◽  
Fixed Bed ◽  
Quality Attributes ◽  
Red Pepper ◽  
Convective Drying ◽  
Solar Drying ◽  
Rehydration Ratio ◽  
Drying System

The effect of conventional convective drying (CCD) and convective solar drying (CSD) based on a solar collector and photovoltaic on the quality of dried red pepper was researched. The study was aimed to determine the effect of five drying system (CCD 50°C, CCD 60°C, CCD 70°C, CSD, and open sun drying) on the quality attributes of dried red pepper. The quality observed were rehydration ratio, ascorbic acid, capsaicin, non-enzymatic browning index, anthocyanin, and carotenoids. The results of the study confirmed that the drying system significantly affected the quality attributes of dried red pepper except for anthocyanin.  The CSD had a satisfactory result, shown by some attributes  (carotenoids, ascorbic acid, and ratio) which were not statistically different from the quality of dried red pepper gained from CCD 50°C.

scholarly journals Effects of Infrared Pasteurization on Quality of Red Pepper Powder

2011 ◽  
Vol 43 (2) ◽  
pp. 156-160 ◽  
Author(s):  
Jin-Joo Jung ◽  
Eun-Ju Choi ◽  
You-Jin Lee ◽  
Sung-Tae Kang
Keyword(s):  
Red Pepper ◽  
Pepper Powder ◽  
Red Pepper Powder

PERFORMANCE OF MODIFIED YSD-UNIB12 SOLAR DRYER FOR CLOTHES MATERIAL DRYING

2013 ◽  
Vol 3 (2) ◽  
pp. 98-104
Author(s):  
Yuwana Yuwana ◽  
Bosman Sidebang ◽  
Evanila Silvia
Keyword(s):  
Sun Drying ◽  
Solar Dryer

YSD-UNIB12 solar dryer has been modified its interior by replacing the trays with rail suitable for clothes hanger and size in order to be applied to dry clothes. The dryer had 3 x 6 m2 total area with about 300 pieces of clothes capacity. The dryer finishes drying of wet towel faster (about 12 hours) than that of sun drying (more than 18 hours). The dryer also completed drying of “batik” cloth comparable to that of sun drying (about 13 hours) and drying of singlet faster (12 hours) that of sun drying (13 hours). The modified YSD-UNIB12 resulted better quality of dry cloth and was ready to be adopted for drying clothes

scholarly journals Effect of Drying Whole and Half Chili Pods Using a Solar Dryer with CaCl2 Desiccant on Quality of Powder Chili

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Nauas D. M. Romauli ◽  
Himsar Ambarita ◽  
Al Qadry ◽  
Hendrik V. Sihombing
Keyword(s):  
Vitamin C ◽  
Beta Carotene ◽  
Quality Parameters ◽  
Solar Drying ◽  
Drying Process ◽  
Drying Time ◽  
Powder Product ◽  
Chili Powder ◽  
Pepper Powder

This study investigated the quality of dried whole and half chili pods’ powder dried with solar drying combined with CaCl2 desiccant compared with natural convection solar drying to produce the final chili powder product. Besides the sensory analysis, the quality parameters such as beta-carotene, moisture, vitamin C, and ash content were also observed. The results showed that 57 hours of drying time of whole and half chili pods using solar drying can reach moisture content below 5%. Beta-carotene, ash, and vitamin C contents of the whole chili were higher than those of half chili pods’ dried pepper powder; they were 20.38 ± 0.22   mg / 100   g , 5.81 ± 0.15 % , and 23.99 ± 0.57   mg / 100   g , respectively. This study can guide the red chili drying process based on the quality of the dried chili powder.

Effects of Drying Methods on Quality of Red Pepper Powder

2012 ◽  
Vol 41 (9) ◽  
pp. 1315-1319 ◽  
Author(s):  
Yong-Re Lim ◽  
Ye-Na Kyung ◽  
Heon-Sang Jeong ◽  
Hae-Yong Kim ◽  
In-Guk Hwang ◽  
...  
Keyword(s):  
Red Pepper ◽  
Drying Methods ◽  
Pepper Powder ◽  
Red Pepper Powder
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