Performance evaluation of the semicylindrical solar tunnel dryer for drying handmade paper

Sevda, M. S.; Rathore, Narendra Singh

doi:10.1063/1.3302139

Cited by 12 publications

(4 citation statements)

References 11 publications

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“…Several studies have been conducted by researchers to improve the performance of GHDs. Some of these advancements are their integration with PV modules [26,50,52,[70][71][72][73][74]; application of an opaque north wall to hamper heat loss from the dryer to ambient [75][76][77][78][79]; integration of thermal storage materials i.e., sand, phase change materials (PCMs), rockbed and black colored concrete floor [80][81][82][83]; integration of solar air heaters for faster drying [27,84]; and adding a supplementary area for drying area augmentation [85]. In this section, we discuss the most common technologies that are integrated with GHDs to improve their thermal efficiency, decrease the drying time, and increase the quality of the final product.…”

Section: Solar-assisted Greenhouse Dryers (Sghds)mentioning

confidence: 99%

Recent Advancements in Technical Design and Thermal Performance Enhancement of Solar Greenhouse Dryers

Gorjian

Hosseingholilou

Jathar³

et al. 2021

Sustainability

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The food industry is responsible for supplying the food demand of the ever-increasing global population. The food chain is one of the major contributors to greenhouse gas (GHG) emissions, and global food waste accounts for one-third of produced food. A solution to this problem is preserving crops, vegetables, and fruits with the help of an ancient method of sun drying. For drying agricultural and marine products, several types of dryers are also being developed. However, they require a large amount of energy supplied conventionally from pollutant energy sources. The environmental concerns and depletion risks of fossil fuels persuade researchers and developers to seek alternative solutions. To perform drying applications, sustainable solar power may be effective because it is highly accessible in most regions of the world. Greenhouse dryers (GHDs) are simple facilities that can provide large capacities for drying agricultural products. This study reviews the integration of GHDs with different solar technologies, including photovoltaic (PV), photovoltaic-thermal (PVT), and solar thermal collectors. Additionally, the integration of solar-assisted greenhouse dryers (SGHDs) with heat pumps and thermal energy storage (TES) units, as well as their hybrid configuration considering integration with other renewable energy sources, is investigated to improve their thermal performance. In this regard, this review presents and discusses the most recent advances in this field. Additionally, the economic analysis of SGHDs is presented as a key factor to make these sustainable facilities commercially available.

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Section: Solar-assisted Greenhouse Dryers (Sghds)mentioning

confidence: 99%

Recent Advancements in Technical Design and Thermal Performance Enhancement of Solar Greenhouse Dryers

Gorjian

Hosseingholilou

Jathar³

et al. 2021

Sustainability

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“…Drying. It has been found that about 68 per cent area of hemispherical shaped solar tunnel dryer towards south is able to receive sunlight whereas remaining 32 per cent area toward north is from the sun [11]. It is assumed that the overall thermal efficiency of solar tunnel dryer is 40 per cent.…”

Section: Collector Area Of Solar Tunnel Dryer Required Formentioning

confidence: 99%

Design and Development of Walk-In Type Hemicylindrical Solar Tunnel Dryer for Industrial Use

Seveda

2012

ISRN Renewable Energy

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This paper deals with the critical design specifications and field performance of walk in type hemicylindrical solar tunnel dryer for drying 1500vkg industrial product (dibasic calcium phosphate) in actual use. A tunnel like framed structural covered with UV-stabilized polythene sheet walk-in type solar tunnel dryer was designed, developed, and commissioned at Udaipur (27∘ 42′ N, 75∘ 33′ E), Rajasthan, India with a solar collector area of 134.74 m2 for drying di-basic calcium phosphate, having an initial moisture content of 62.87% dry basis and to get a desired moisture content of 10.62% dry basis within two days. The performance of solar tunnel dryer for drying di-basic calcium phosphate was evaluated through no-load and full-load conditions tests in the summer and winter months. The results were shown in terms of the variation of air temperature, solar radiation, relative humidity, air flow rate, moisture content, drying rate, and so forth.

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“…The greenhouse is not limited to drying of agro products but also used for drying non-agro products like cotton, sludge, paper, rubber etc. [29][30][31][32]. The greenhouse operates usually in either active or passive modes.…”

Section: Introductionmentioning

confidence: 99%

“…as compared to drying under the open sun [21,40]. Various researches had taken place to improve the efficiency of greenhouse dryers like insulating north wall [29,30,[41][42][43], using mirrors for reflecting infrared radiations [44], using thermal storage material in floor [10,29,32,45,46], etc. The hybrid dryers are also a step towards the use of solar energy in a more effective manner and improving the productivity of greenhouses.…”

Section: Introductionmentioning

confidence: 99%

A review on thermal analysis of hybrid greenhouse solar dryer (HGSD)

Singh

Gaur

2022

Journal of Thermal Engineering

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The objective of the paper is to present the modifications done in hy brid gr eenhouse solar dryers to make them more efficient. As hy brid dryers we re developed to ov ercome the various limitations of other types of solar dryers. Due to modifications in dryers, the effect on various heat transfer parameters like heat transfer coefficient, drying time, drying efficiency, etc. is studied and also encapsulated in the paper. It is found that in most of the hybrid dryers, the maximum temperature of the drying chamber is around 65-80°C. This shows the suitability of a hybrid dryer for drying high moisture crops. Also, the drying time for most of the crops is around 2-3 days, which shows the faster moisture removal rate inside the hybrid dryers. According to the literature studied, the maximum drying efficiency of a hybrid dryer is reported by about 35%. The paper also encapsulates the various relations/ equations used by different researchers to carry out the thermal modeling and heat transfer analysis of greenhouse dryers.

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Performance evaluation of the semicylindrical solar tunnel dryer for drying handmade paper

Cited by 12 publications

References 11 publications

Recent Advancements in Technical Design and Thermal Performance Enhancement of Solar Greenhouse Dryers

Recent Advancements in Technical Design and Thermal Performance Enhancement of Solar Greenhouse Dryers

Design and Development of Walk-In Type Hemicylindrical Solar Tunnel Dryer for Industrial Use

A review on thermal analysis of hybrid greenhouse solar dryer (HGSD)

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