Low-cost drying methods for developing countries

Chua, K.J.; Chou, S.K.

doi:10.1016/j.tifs.2003.07.003

Cited by 215 publications

(129 citation statements)

References 15 publications

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“…A comprehensive review of the various designs, details of construction and operational principles of the wide variety of practically-realized designs of solar energy drying systems was presented [18]- [26]: Asys-dryers, mixed-mode solar dryers, and hybrid solar dryers [27]. Low cost drying technologies suitable for rural farming areas were presented by [28].…”

Section: Introductionmentioning

confidence: 99%

Design of Fruits Solar Energy Dryer under Climatic Condition in Jordan

Al-Busoul¹

2017

JPEE

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In this paper, a new design of a natural convection solar dryer used to dry fruits is presented; taking into account the local climatic conditions prevailed in Jordan during summer season. The dryer will have a capacity of 100 kg of sliced apples and the simulation is based on mass and heat balances. It is deemed that such new design will be able to reduce the original moisture content, of the final product, to 10% within two days. The special tailored program could be used to calculate drying parameters for similar products under different climatic conditions. The next step will be focused on constructing the solar dryer in order to conduct actual experiments in the field.

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Section: Introductionmentioning

confidence: 99%

Design of Fruits Solar Energy Dryer under Climatic Condition in Jordan

Al-Busoul¹

2017

JPEE

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“…Leaves containing a large amount of initial moisture are highly susceptible to rapid degradation (Chua and Chou, 2003). Drying is a very common practice to extend the shelf life of products since moisture reduction prevents the growth of microorganism (Shen-Dun et al, 2011) and allows longer periods of storage, maintaining quality and stability of product (Lemus-Mondaca et al, 2015), while it minimizes packing, transport, handling, and distribution requirements (Kwok et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Dehydrated products obtained by air-drying have a long shelf life but the quality could be changed in the original product, depending on the conditions applied (Ratti, 2001). Vacuum freeze-drying is a method with high-quality final products; however, is the most expensive process for manufacturing a dehydrated product (Chua and Chou, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Effect of different drying methods on the composition of steviol glycosides in Stevia rebaudiana Bertoni leaves

Aranda-González¹,

Betancur‐Ancona²,

Chel‐Guerrero³

et al. 2017

International Agrophysics

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A b s t r a c t. Drying techniques can modify the composition of certain plant compounds. Therefore, the aim of the study was to assess the effect of different drying methods on steviol glycosides in Stevia rebaudiana Bertoni leaves. Four different drying methods were applied to Stevia rebaudiana Bertoni leaves, which were then subjected to aqueous extraction. Radiation or convection drying was performed in stoves at 60ºC, whereas shade or sun drying methods were applied at 29.7ºC and 70% of relative humidity. Stevioside, rebaudioside A, rebaudioside B, rebaudioside C, rebaudioside D, dulcoside A, and steviolbioside were quantified by a validated HPLC method. Among steviol glycosides, the content (g 100 g -1 dry basis) of stevioside, rebaudioside A, rebaudioside B, and rebaudioside C varied according to the drying method. The total glycoside content was higher in sun-dried samples, with no significant differences compared to shade or convection drying, whereas radiation drying adversely affected the content of rebaudioside A and rebaudioside C (p <0.01) and was therefore a method lowering total glycoside content. The effect of the different drying methods was also reflected in the proportion of the sweetener profile. Convection drying could be suitable for modern food processing industries while shadow or sun drying may be a low-cost alternative for farmers.

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“…They selected six types of dryers as low-cost dryers according to three considerations included: 1-low cost manufacturing; 2-uncomplicated operation that does not need expert operator and 3-efficient drying processes. These six types selected dryers were: fluidized bed, spouted bed, infrared, solar, simple convective and desiccant drying [12].…”

Section: Introductionmentioning

confidence: 99%

Energy Intensity Diagnostics Contributed to Solar Dryers Energy Challenges

Esmailie¹,

Aminy²,

Ghadamian³

2015

JOCET

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Abstract-The energy consumption of dryers as an energy-intensive industry system is discussed in the present paper. In order to reduce this energy amount, solar dryers were applied since ancient times, among these kinds of dryers, high drying rate solar dryers include fluidized bed and spouted bed were discussed in this research study. The experiment and calculation results depicted that, the fluidized bed solar dryer has higher drying rate than spouted bed dryer, even though, spouted bed dryer has less energy intensity consumption.Index Terms-Energy efficiency, fluidized bed, solar dryer, spouted bed.

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Low-cost drying methods for developing countries

Cited by 215 publications

References 15 publications

Design of Fruits Solar Energy Dryer under Climatic Condition in Jordan

Design of Fruits Solar Energy Dryer under Climatic Condition in Jordan

Effect of different drying methods on the composition of steviol glycosides in Stevia rebaudiana Bertoni leaves

Energy Intensity Diagnostics Contributed to Solar Dryers Energy Challenges

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