Design, Development and Performance of Indirect Type Solar Dryer for Banana Drying

Lingayat, Abhay; Chandramohan, V.P.; Raju, V. Ramachandra

doi:10.1016/j.egypro.2017.03.041

Cited by 206 publications

(73 citation statements)

References 14 publications

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“…This phenomena can be found in other solar-dryer research (Azimi, Tavakoli, Beheshti, & Rahimi, 2012;Kabeel & Abdelgaied, 2016). The values of collector efficiency in this experiment are quite similar with other solar-dryer studies, for instance, 36% at max (Kabeel & Abdelgaied, 2016), 31.5% on average (Lingayat, Chandramohan, & VRK, 2017), 42% on average (Anyanwu et al, 2012), and 48,2% on average (Lakshmi et al, 2019) Therefore, a low air-flow rate results in decreasing collector efficiency (Dhanushkodi et al, 2014;Mokhtarian, Tavakolipour, & Kalbasi-Ashtari, 2016). A possible solution to this problem is to install fans at the air inlet of the solar collector which will increase the air-flow rate inside the collector and the collector efficiency.…”

Section: Color Analysissupporting

confidence: 91%

Hybrid solar dryer for sugar‐palm vermicelli drying

Suherman

Utami

Ningrum

2020

J Food Process Engineering

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Sugar palm is an abundant palm in Indonesia and widely used for various foods, one of which is vermicelli. During vermicelli production, local farmers still implement open‐sun drying, which reduces the quality of vermicelli, requires long periods of time, and cannot be performed during poor weather. Therefore, in this study, a new method of vermicelli drying is introduced using a hybrid solar dryer, which consists of a solar dryer and an additional heater powered by liquefied natural gas. Hybrid solar drying is conducted at 40, 60, 80, and 100°C. With 2 hr of drying time, the final moisture contents of vermicelli dried using hybrid solar dryer have satisfy the standard limit, while the open‐sun drying and natural solar drying do not, indicating that hybrid solar drying is faster and more effective. Vermicelli drying occurs at the falling‐rate period and increasing drying temperature from 40 to 100°C increases dryer efficiency, energy utilization ratio, and exergy efficiency, from 13.02 to 17.02%, from 0.18 to 0.32, and from 67.4 to 83.6%, respectively. Although the overall quality of dried vermicelli is acceptable, increasing drying temperature from 40 to 100°C result in the damaged vermicelli surface as evident from SEM analysis and degradation of vermicelli whiteness value from 87.2 to 82.5. Practical applications The drying process is playing an important role in heat sensitive products dehydration. The present study provides an investigation of potential use of solar energy for drying of vermicelli which combine with the natural gas heating process. The results show that hybrid drying system could enhance the product quality of vermicelli and also reduce the drying process. During drying, proximate components of vermicelli essentially do not change but it alters the color of product.

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Section: Color Analysissupporting

confidence: 91%

Hybrid solar dryer for sugar‐palm vermicelli drying

Suherman

Utami

Ningrum

2020

J Food Process Engineering

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“…Amount of moisture present in the initial mass of the product can be represented on wet basis is expressed as (Lingayat, Chandramohan, & Raju, )

M_{italicin} = \frac{W_{i} - W_{f}}{W_{i}}

…”

Section: Materials and Methodologymentioning

confidence: 99%

Investigation on indirect natural convection solar drying of anti‐diabetic medicinal products

Mathew

Venugopal

2019

J Food Process Preserv

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A performance analysis of indirect natural convection solar dryer (INCSD) was carried out by drying anti‐diabetic medicinal products like coccinia grandis, allium cepa, and emblica officinalis by cutting into different orientations. Drying results shows that thickness, orientation of cut, and surface area plays a vital role in the drying characteristics of the products in INCSD. The average collector and dryer efficiency of INCSD was 15% and 7%, respectively. Drying time was reduced up to 11 hr in INCSD than open sun drying. Alpha amylase inhibition assay values for products dried under open sun (15.67%, 5.89%, and 8.56%) showed better results, whereas minerals like potassium content in allium cepa (597 mg/100 g), sodium content in coccinia grandis (130.1 mg/100 g), magnesium content in allium cepa, and emblica officinalis (80 mg/100 g) were higher when dried in INCSD. Vitamin C and sugar content in products were almost same for both INCSD and open sun drying. Practical applicationsIndirect natural convection solar dryers are mainly benefited by small‐scale farmers as it takes less drying time and possess better quality when compared to open sun drying. Drying anti‐diabetic medicinal products in INCSD can be considered as a boon for pharmaceutical industries as the dryer can give good‐quality dried products that can be used for preparing anti‐diabetic medicines. It can also reduce the production cost of anti‐diabetic medicines.

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“…Kadar air daun gaharu rata-rata dapat diturunkan mencapai 10 % selama 2-3 hari apabila sinar matahari rata-rata lebih besar sama dengan 500 W/m 2 . Sebagaimana, penurunan kadar air juga terjadi pada pengeringan buah pisang yang diteliti oleh Lingayat (2017). Kadar air buah pisang berkurang dengan bertambahnya waktu pengeringan.…”

Section: Gambar 4 Skema Perpindahan Kalor DI Kolektor Surya Berlubangunclassified

Teknologi Kolektor Surya Berlubang tanpa Kaca Transparan untuk Mengeringkan Daun Gaharu

2018

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The perforated solar collector technology is a highly potential solution to take advantage of renewable energy in tropical countries such as Indonesia. This technology can be applied as a simple technology for drying of agricultural products. This study aims to determine the rate of the decreased moisture content of gaharu leafs. In this study, the perforated solar collector equipped with four ribs was used. The efficiency evaluation of perforated solar collector plate was conducted in Wind Tunnel-Rig, Basic phenomenon Laboratory of Mechanical Engineering Department, Sriwijaya University. The dimension of the plate is 850 mm × 300 mm × 1.5 mm, which has 1018 holes with 2.5 mm in diameter. The results show that the drying rate for achieving the 10% moisture content of the gaharu leafs, can be reached in 2–3 days. This condition occurs when the weather is sunny, or not cloudy and rainy. In other condition, when the sunshine with an average solar irradiation on the surface is greater than or equal 500 W/m2. The efficiency tests of the perforated aluminum plate solar collector using wind velocity as input parameter show that the blackened plate resulted in better performance (12,83%) than the colorless one in (6,36%). ABSTRAKTeknologi kolektor surya berlubang ini merupakan salah satu solusi untuk dapat memanfaatkan energi baru terbarukan yang peluangnya sangat besar untuk dikembangkan di negara beriklim tropis seperti negara Indonesia. Teknologi ini dapat digunakan sebagai teknologi tepat guna untuk mengeringkan produk-produk pertanian. Tujuan penelitian ini adalah untuk menentukan laju penurunan kadar air daun gaharu. Dalam pengujian pengeringan ini digunakan kolektor surya berlubang bersayap empat. Evaluasi efisiensi pelat kolektor surya berlubang dilakukan di Wind Tunnel Laboratorium Fenomena Dasar, Jurusan Teknik Mesin, Universitas Sriwijaya. Dimensi dari pelat kolektor surya berlubang adalah 850 mm x 300 mm x 1,5 mm, dengan jumlah lubang 1.018 buah yang berdiameter 2,5 mm. Hasil penelitian menunjukkan bahwa laju pengeringan daun gaharu untuk mencapai kadar air 10 % dapat dihasilkan dalam 2 ¸ 3 hari. Kondisi ini terjadi bila cuaca cerah, tidak hujan dan tidak berawan. Dalam kondisi lain, ketika matahari bersinar dengan radiasi matahari rata-rata yang mencapai permukaan lebih besar atau sama dengan 500 W/m2. Pengujian efisiensi kolektor surya pelat alumunium berlubang dengan parameter kecepatan udara, menunjukkan bahwa pelat berwarna hitam menghasilkan performansi yang lebih baik (12,83%) dibandingkan dengan pelat tanpa warna (6,36%).

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Design, Development and Performance of Indirect Type Solar Dryer for Banana Drying

Cited by 206 publications

References 14 publications

Hybrid solar dryer for sugar‐palm vermicelli drying

Hybrid solar dryer for sugar‐palm vermicelli drying

Investigation on indirect natural convection solar drying of anti‐diabetic medicinal products

Teknologi Kolektor Surya Berlubang tanpa Kaca Transparan untuk Mengeringkan Daun Gaharu

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