scholarly journals Optimization of drying conditions for Jackfruit pulp using Refractance Window Drying technology

2021 ◽  
Author(s):  
Sophie Nansereko ◽  
John Muyonga ◽  
Yusuf B. Byaruhanga
Keyword(s):  
Drying Technology ◽  
Drying Conditions

Research on Constant-Temperature Drying Test of Cotton Straw and Regression Analysis of Drying Rate

2012 ◽  
Vol 472-475 ◽  
pp. 1645-1651
Author(s):  
Jian Jun Hu ◽  
Sheng Qiang Shen ◽  
Ting Zhou Lei ◽  
Hao Huang ◽  
Quan Guo Zhang
Keyword(s):  
Regression Analysis ◽  
Constant Temperature ◽  
Initial Moisture Content ◽  
Drying Rate ◽  
Regression Equations ◽  
Drying Time ◽  
Drying Curves ◽  
Drying Technology ◽  
Drying Conditions ◽  
Two Stages

Constant-temperature drying tests for cotton straw under different conditions were performed with an integrated thermal analyzer, and the influence of different drying conditions on the drying process was analyzed. The process was divided into preheating stage, constant-rate drying stage, and decelerating drying stage. Regression analysis was conducted for drying curves at the latter two stages, and then the drying time at the critical point was determined. Regression equations of drying rate at these stages were produced. Research results showed that the decelerating drying stage of cotton straw included two decelerating intervals, and the best ending point of the drying of the cotton straw that had an initial moisture content of 56.1% and a drying temperature of 100°Cwas 600s, thus providing experimental data and reference for research on drying technology of straws.

Drying Model of Paste Materials in Fluidized Bed with Inert Particles and Immersed Heating Tubes

2011 ◽  
Vol 412 ◽  
pp. 463-468
Author(s):  
Bi Qiang Yao ◽  
Xue Jun Zhu
Keyword(s):  
Fluidized Bed ◽  
High Viscosity ◽  
Water Evaporation ◽  
Low Dissipation ◽  
Inert Particles ◽  
Drying Technology ◽  
Drying Properties ◽  
Drying Conditions ◽  
Drying Efficiency ◽  
Equipment Size

The mechanism of drying paste materials was investigated in a fluidized bed with inert particles and inner heats. A mathematical model is proposed to predict the specific water evaporation. The drying properties of dryer can be predicted based on the correlation equations. The drying of paste CaCO3materials was industrial-mode experimentally carried out in a fluidized bed with inert particles and immersed heating tubes. The paste material was spray droplet in sizes range of 200~400μm with pressure nozzles or air-blast nozzles, and spray to the surface of inert particles, and the feasible drying conditions were researched. The feasible drying parameters, operation parameters and equipment parameters were researched. The results show that this drying technology can be enhanced the heat transfer and the paste materials of high viscosity can be effectively distributed into the fluidized bed, well distributed temperature in beds, large elasticity of operation, the low energy consumption. The new drying equipment has high drying capacity, small equipment size. The results can provide important meaning on theory and instructing practice for developing the new drying technology with high drying efficiency and low dissipation of energy.

Elucidation of an Isopropyl Alcohol (IPA) Adsorption Phenomenon on a Wafer Surface for Achieving an Ultra-Clean and IPA-Saving Drying Process in the Batch Cleaning System

2012 ◽  
Vol 187 ◽  
pp. 79-82
Author(s):  
Yoshiya Hagimoto ◽  
Tomoki Tetsuka ◽  
Hayato Iwamoto ◽  
Hironobu Hyakutake ◽  
Hiroshi Tanaka
Keyword(s):  
High Performance ◽  
Great Influence ◽  
Wafer Surface ◽  
Drying Process ◽  
Supply Rate ◽  
Adsorption Phenomenon ◽  
Cleaning System ◽  
Drying Technology ◽  
Drying Conditions ◽  
And Control

Displacing the water remaining on a wafer surface by using condensed IPA improves the effectiveness of IPA-based drying techniques. Although this drying technology has been used for years, recent device technologies have needed extremely high-performance drying processes. We characterized an IPA adsorption phenomenon on a wafer surface by using the batch cleaning system and determined the appropriate drying conditions. Our results revealed that the IPA supply rate had a great influence on watermark formation. This can be prevented by increasing the IPA supply rate because the rapid increase of IPA concentration in the remaining water on wafer surface suppresses the dissolution of silicon into water. Through both understanding of an IPA adsorption on a wafer surface and control of the drying condition, an ultra-clean and IPA-saving drying process with a watermark-free performance for future device technologies can be achieved.

Mitigation of relative humidity (RH) on phytochemicals and functional groups of dried pineapple (Ananas comosus) slices

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Frederick Sarpong ◽  
Muhammad Tayyab Rashid ◽  
Hafida Wahia ◽  
Tahany Abdel-Ghafr Ahmed Aly ◽  
Cunshan Zhou
Keyword(s):  
Chemical Composition ◽  
Relative Humidity ◽  
Functional Groups ◽  
Critical Role ◽  
Ananas Comosus ◽  
Practical Application ◽  
Varied Temperature ◽  
Higher Temperature ◽  
Drying Technology ◽  
Drying Conditions

AbstractAs part of finding a mechanism to ameliorate the decomposition of phytochemicals and antioxidant in drying processing, this research was conducted. To achieve this, pineapple slices was dried using relative humidity (RH) dryer at varied temperature (60–80 °C) combined with RH (10–30%) conditions. The results revealed that higher RH retained with significantly difference (p <0.05) the phytochemical and antioxidant concentrations and preserved the color and functional groups of dried pineapple under varying drying temperatures. The result also shows that concentrations of these compounds may differ as a result of disparities in the chemical composition which may be worsening by drying conditions such as higher temperature and lower RH. In effect, RH could savage the intensity of losses of these compounds and could therefore play a critical role in drying technology. Practical application: The loss of phytochemicals including polyphenols and antioxidant remains one of the challenging phenomena in drying technology. This research finds ameliorative option for mitigating against the loss of polyphenols and antioxidant by exploring the use of relative humidity (RH). The result shows that RH could savage the intensity of loss of these compounds and could therefore play a critical role in drying technology.

The influence of fibres on the structure of thermally dried sludge product

1996 ◽  
Vol 34 (3-4) ◽  
pp. 469-473
Author(s):  
Paul Lowe ◽  
Michael Brown ◽  
Kathleen Hudson
Keyword(s):  
Bulk Density ◽  
Fibre Content ◽  
High Concentration ◽  
Secondary Sludge ◽  
Limited Experience ◽  
Apparent Reason ◽  
Drying Technology ◽  
Dried Sludge ◽  
Lower Bulk Density ◽  
The Relationship

There appears to be a limited experience world-wide in the application of thermal drying technology to processing raw undigested sludge. This limited experience has shown that the products from raw sludge processing have a much lower bulk density than those from digested sludge. The apparent reason for this phenomenon demonstrated by this work, is the high concentration of fibres in the raw undigested sludge. Different sludges show varying degrees of fibre concentration with a decrease in fibre content as the proportion of secondary sludge increases. The relationship between the bulk density of the product and the fibre content are given and this shows that as the fibre content increases the bulk density of the product will fall. It is recommended that a compaction/pelletisation stage is included in the process stream for high fibre sludges.

scholarly journals Estimation of moisture ratio for apple drying by convective and microwave methods using artificial neural network modeling

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vali Rasooli Sharabiani ◽  
Mohammad Kaveh ◽  
Roozbeh Abdi ◽  
Mariusz Szymanek ◽  
Wojciech Tanaś
Keyword(s):  
Specific Energy Consumption ◽  
Effective Diffusivity ◽  
Moisture Ratio ◽  
Microwave Drying ◽  
Convective Drying ◽  
Neural Network Modeling ◽  
Drying Methods ◽  
Apple Slices ◽  
Artificial Neural ◽  
Drying Technology

AbstractTwo different drying methods were applied for dehydration of apple, i.e., convective drying (CD) and microwave drying (MD). The process of convective drying through divergent temperatures; 50, 60 and 70 °C at 1.0 m/s air velocity and three different levels of microwave power (90, 180, and 360 W) were studied. In the analysis of the performance of our approach on moisture ratio (MR) of apple slices, artificial neural networks (ANNs) was used to provide with a background for further discussion and evaluation. In order to evaluate the models mentioned in the literature, the Midilli et al. model was proper for dehydrating of apple slices in both MD and CD. The MD drying technology enhanced the drying rate when compared with CD drying significantly. Effective diffusivity (Deff) of moisture in CD drying (1.95 × 10−7–4.09 × 10−7 m2/s) was found to be lower than that observed in MD (2.94 × 10−7–8.21 × 10−7 m2/s). The activation energy (Ea) values of CD drying and MD drying were 122.28–125 kJ/mol and 14.01–15.03 W/g respectively. The MD had the lowest specific energy consumption (SEC) as compared to CD drying methods. According to ANN results, the best R2 values for prediction of MR in CD and MD were 0.9993 and 0.9991, respectively.

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