Recent advances in solar tunnel dryer for performance improvement in food drying process: a review

2021 ◽  
Vol 20 (3/4) ◽  
pp. 331
Author(s):  
B. Tripathi ◽  
Ankit Kumar Agarwal ◽  
K.B. Rana
Keyword(s):  
Performance Improvement ◽  
Drying Process ◽  
Tunnel Dryer ◽  
Recent Advances

Aqueous electrocatalytic N2 reduction for ambient NH3 synthesis: recent advances in catalyst development and performance improvement

2020 ◽  
Vol 8 (4) ◽  
pp. 1545-1556 ◽  
Author(s):  
Xiaojuan Zhu ◽  
Shiyong Mou ◽  
Qiling Peng ◽  
Qian Liu ◽  
Yonglan Luo ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Reduction Reaction ◽  
Design And Development ◽  
Research Directions ◽  
Catalyst Development ◽  
Recent Advances ◽  
Ambient Nh3 ◽  
And Performance ◽  
Catalytic Performances

In this review, we summarize recent advances in the design and development of electrocatalysts for the N2 reduction reaction. We also discuss the strategies to boost catalytic performances, the methods for reliable NRR experiments, and perspectives for further research directions.

Mathematical Modeling of the Drying Process of Chrome Shavings

2015 ◽  
Vol 1101 ◽  
pp. 463-466
Author(s):  
Juan Carlos Beltrán-Prieto ◽  
Nguyen Huynh Bach Son Long ◽  
Karel Kolomazník
Keyword(s):  
Mathematical Modeling ◽  
Laplace Transformation ◽  
Deterministic Model ◽  
Separation Of Variables ◽  
Effective Diffusion ◽  
Water Molecules ◽  
Drying Process ◽  
Tunnel Dryer ◽  
Free Moisture ◽  
Modeling Data

This paper described the mathematical modeling of chrome shavings drying by performing a microscopic balance for water content to describe the unidimensional transfer of water within the solid at a certain temperature. The deterministic model was solved using Laplace transformation and separation of variables methods in order to determine the average free moisture content at different intervals of time during the drying period. Agreement was observed between both, experimental and modeling data. The effective diffusion coefficient of water molecules during the drying of chrome shavings in a tunnel dryer was determined to be 5.8x10-6m2/h.

scholarly journals THE CONTENT AND PIGMENT COMPOSITION OF Sargassum crassifolium J.Agardh ON SEVERAL DRYING TREATMENTS

2018 ◽  
Author(s):  
Windu Merdekawati
Keyword(s):  
Chlorophyll A ◽  
High Performance ◽  
Brown Seaweed ◽  
Drying Process ◽  
Natural Pigment ◽  
Tunnel Dryer ◽  
Common Process ◽  
Drying Treatment ◽  
The Common ◽  
Layer Chromatography

S. crassifolium J.Agardh is one of the brown seaweed species which is abundant and widespread in Indonesian waters. This species of brown seaweed has been used as a source of food and medicine, one of them is in the form of alginates. So far, the common process of manufacturing alginates eliminates a lot of the pigment in that seaweed. S. crassifolium J.Agardh is rich in various types of pigments that have benefits for health. This type of seaweed has chlorophyll a and fucoxanthin as its dominant pigment. The aim of this research is to determine the content and composition of the pigment of S. crassifolium J.Agardh on fresh and drying treatment. The drying treatment includes open air sun drying (SD), dehumidifier, and solar tunnel dryer (STD). Pigment identification process is carried out by the method of thin layer chromatography (TLC), spectrophotometer and high performance liquid chromatography (HPLC). Analysis of the pigment content was carried out by the method based on the theory of Maeda et al. (2005) using HPLC. Based on the results of the research on the fresh extract of S. crassifolium J.Agardh, several types of pigment and their percentage are obtained, which are: chlorophyll a (68.37%); fucoxanthin (20.68%) and xantophyll (10.95%). On the drying process, xantophyll and fucoxanthin were increased, on STD (16.17% and 28.96%); SD (21.34% and 43.43%); dehumidifier (15.98% and 34.07%). The drying process also causes the formation of pheophytin on STD and SD treatments which are 48.09% and 35.32% respectively, as well as the increment of xantophyll content.Keyword: drying treatment, pheophytin, S. crassifolium, xanthophyll.This paper was published in Proceeding of Natural Pigment of South East Asia Conference 2010

scholarly journals OPTIMIZE, UPGRADE OR INVEST IN A NOVEL DRYER? – A BRICK FACTORY CASE STUDY

2021 ◽  
Vol 1 (2) ◽  
pp. 62-70
Author(s):  
Miloš R. Vasić ◽  
◽  
Milica V. Vasić ◽  
Keyword(s):  
Raw Materials ◽  
Ambient Air ◽  
Raw Material ◽  
Drying Process ◽  
Tunnel Dryer ◽  
Large Size ◽  
Speed Up ◽  
The One ◽  
Industrial Level ◽  
Energy Balances

Drying has an enormous impact on the quality of final masonry clay elements. The accumulated knowledge about modeling the drying process, as well as the registered progress in computing the coupling between the heat and mass transfer during the last decade has reached the applicative industrial level. The available novel commercial drying solutions have dropped the drying cycle to 5 hours for hollow clay products and up to 9 hours for clay blocks of large size and weight. The ability to speed up the drying process also strongly depends on the properties of the raw materials. The decision on optimization of the existing dryer and its upgrade or investment in a novel drying facility must be experimentally validated. Results of the one-month monitoring and analysis of the production process in one Serbian brick factory including the material and energy balances are given in this paper. Based on the collected data, raw material limitations and costs of the novel dryer the existing tunnel dryer upgrade and the minimization of the "false" ambient air into the dryer are proposed.

scholarly journals Kinetics study on dried Moringa oleiferaleaves during sun drying, multi commodity solar tunnel dryer drying and oven drying

2019 ◽  
Vol 2 (1) ◽  
pp. 10-15
Author(s):  
Md. Suzauddula ◽  
M Moeen Miah ◽  
Nasima Akter Mukta ◽  
Najia Kamrul ◽  
Md. Bellal Hossain
Keyword(s):  
Human Body ◽  
Functional Foods ◽  
Moringa Oleifera ◽  
Moisture Loss ◽  
Content Increase ◽  
Drying Process ◽  
Total Removal ◽  
Tunnel Dryer ◽  
Nutrient Value ◽  
Different Types

AbstractMoringa oleifera leaves are familiar to all, but unknowing that this leaves contain quite a lot of nutrient value which are useful for human body function. This plant’s leaves contain verities of antioxidant which inhabit & fight against free radical to cell of human body for preventing cancer. Moringa leaves need to dry for use through diversified use. Storage and processing quality depend on better dry. The purpose of this research isto identifying and examined performance of different types of dryer to dry Moringa oleiferaleaves. For Moringa dried leaves apply three common type of dryer i.e. sun dryer, multi commodity solar tunnel dryer and oven dryer. This study was conducted to introducing & used of Moringa oleifera leaves as ingredient of functional foods. Through this study the ration of time and moisture loss by several dryer are mentioned. Most of the dryer for temperature range 30°C to 70°C. In MCST dryer found better in color and dried rate as compared others, highest moisture loss in happed in MCST dryer and total removal moisture 75 %. At each dryer 40 g sample was taken. Frequently after 2 hours the dryers were observed and the Moringaleaves (sample 1, 2) were scatteredhomogenously into the baskets or salver. Moistnessreduction datawasnotedaftereach 2 hour breakswhile drying process running. The time and moisture contend will vary for based on the maturity of moringa leaves. In the closing moisture found at the final product was approximately 25 % and total 17.50 g. Optimum amount of moisture content increase shelf life, prevent loss of nutrition and protect form microbial spoilage.

scholarly journals Performance Evaluation of Solar Tunnel Dryer for Drying of Garlic.

2017 ◽  
Vol 5 (2) ◽  
pp. 212-218 ◽  
Author(s):  
Arjoo Arjoo ◽  
Yadvika Yadvika ◽  
Y.K. Yadaadav
Keyword(s):  
Performance Evaluation ◽  
Moisture Content ◽  
Thermal Efficiency ◽  
Initial Moisture Content ◽  
Drying Process ◽  
Tunnel Drier ◽  
Drying Time ◽  
Tunnel Dryer ◽  
Safe Level ◽  
And Performance

This paper presents dying efficiency and performance of the solar tunnel dryer for drying of garlic. The dryer is a tunnel like semi-cylindrical in shape, poly house made up of UV-stabilized polyethylene sheet. The capacity is large enough that it can be used to dry 400 kg of garlic under controlled environmental conditions. The temperature inside the dryer was always higher than the ambient and the variation varied from 8-30 ºC. Initial moisture content of garlic was reduced from 66 % (w.b.) to about 9 % (w.b.) in 9 days which is considered to be a safe level. During the drying process the average thermal efficiency of the drier was estimated to be about 13.45 %. Drying time was considerably reduced with the use of a solar tunnel drier and pressing of the sample. Also, the final dried garlic was found to be good in terms of quality and sensory evaluation shows that it is highly acceptable.

On the Modeling of Drying Process in an Industrial Tunnel Dryer

2020 ◽  
Vol 400 ◽  
pp. 51-56
Author(s):  
Francisca Valdeiza de Souza Tavares ◽  
Atacy Maciel de Melo Cavalcante ◽  
Maria José de Figueiredo ◽  
Anderson Ferreira Vilela ◽  
Ana Raquel Carmo de Lima ◽  
...  
Keyword(s):  
Moisture Content ◽  
Mass Conservation ◽  
Convective Drying ◽  
Average Moisture Content ◽  
Drying Process ◽  
Governing Equations ◽  
Tunnel Dryer ◽  
Good Concordance ◽  
Volume Method ◽  
Hollow Bricks

This paper aims to study convective drying of industrial hollow bricks in a tunnel dryer. A transient mathematical model based on the heat and mass conservation equations applied to the air and brick was derived and the numerical solution (finite-volume method) of the governing equations is presented. Predicted and experimental data of the average moisture content and the temperature of the product during the drying process are compared and a good concordance was verified. Numerical results inside the bed confirm an almost null difference between the moisture content along the process. Similar behavior was verified to the product temperature. These results confirm an efficient drying process.

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