Evaporation rate effect on starting point of shrinkage stress development during drying process in solvent cast polymer film

2012 ◽  
Vol 128 (1) ◽  
pp. 60-65 ◽  
Author(s):  
Reika Katsumata ◽  
Seisuke Ata ◽  
Keiichi Kuboyama ◽  
Toshiaki Ougizawa
Keyword(s):  
Polymer Film ◽  
Evaporation Rate ◽  
Rate Effect ◽  
Shrinkage Stress ◽  
Drying Process ◽  
Stress Development ◽  
Starting Point ◽  
Solvent Cast

KINETICS OF EVAPORATION OF A MODEL SOLUTION OF DISTILLERY DREGS CONTAINING PROTEIN, OIL AND SUGAR

2021 ◽  
Author(s):  
А.С. ДАНИЛЬЧЕНКО ◽  
Т.Г. КОРОТКОВА ◽  
С.Ю. КСАНДОПУЛО
Keyword(s):  
Evaporation Rate ◽  
Experimental Studies ◽  
Petri Dish ◽  
Model Solution ◽  
Soluble Carbohydrates ◽  
Drying Process ◽  
Sugar Water ◽  
Oil Water ◽  
Drying Model ◽  
Kinetics Of

Рассмотрена кинетика сушки послеспиртовой барды при 60°С. Объектом исследований была модельная смесь, состоящая из воды, белков, жиров и растворимых углеводов. Представлены результаты исследований кинетики испарения воды и смесей вода–масло, вода–белок, вода–сахар, вода–масло–белок–сахар, помещенных в чашку Петри. Процесс испарения в изотермических условиях протекал в сушильном шкафу Memmert. Установлено, что добавление вещества в воду снижает скорость испарения воды в периоде постоянной скорости сушки, в периоде падающей скорости сушки продолжительность испарения возрастает. По результатам кинетики сушки модельных смесей можно определять коэффициенты активности компонентов и проводить исследование процесса сушки реальных смесей при проектировании сушилок. The kinetics of drying of the distillery dregs at 60°C is considered. The model mixture containing water, proteins, oils and soluble carbohydrates was the object of research. The results of experimental studies of the kinetics of evaporation of water and mixtures of water-oil, water-protein, water-sugar, water-oil-protein-sugar, placed in a Petri dish, are presented. Evaporation under isothermal conditions was carried out in a Memmert drying cabinet. It is established that the addition of the substance into the water reduces the evaporation rate of water in the period of constant drying speed, the duration of evaporation in the period of falling drying speed increases. According to the results of the kinetics of drying model mixtures, it is possible to determine the activity coefficients of the components and conduct a study of the drying process of real mixtures in the design of dryers.

Estimation of evaporation rate of water droplet group in spray drying process

2020 ◽  
Vol 227 ◽  
pp. 115938 ◽  
Author(s):  
Sayaka Okada ◽  
Shuji Ohsaki ◽  
Hideya Nakamura ◽  
Satoru Watano
Keyword(s):  
Spray Drying ◽  
Water Droplet ◽  
Evaporation Rate ◽  
Drying Process

scholarly journals Influence of Fluid Motion on Evaporation in Drying Process and Estimation of the Evaporation Rate

Seikei-Kakou ◽  
2021 ◽  
Vol 33 (4) ◽  
pp. 135-141
Author(s):  
Takahiro Ono ◽  
Daisuke Suzuki ◽  
Keisuke Sato ◽  
Naoki Ono
Keyword(s):  
Evaporation Rate ◽  
Fluid Motion ◽  
Drying Process

Fertilizer from dried human urine added to ash and lime – a potential product from eco-sanitation system

2016 ◽  
Vol 74 (6) ◽  
pp. 1436-1445 ◽  
Author(s):  
Shanta Dutta ◽  
Björn Vinnerås
Keyword(s):  
Mass Balance ◽  
Human Urine ◽  
Low Temperatures ◽  
Evaporation Rate ◽  
Nitrogen Loss ◽  
Urea Hydrolysis ◽  
Drying Process ◽  
High Ph ◽  
Feasible Option ◽  
Rate Of Evaporation

This research explored the possibility of making fertilizer at a laboratory from source separated and untreated human urine added to ash and lime by drying at low temperatures. A mixture of ash and lime (1:1) was used as drying agent and human urine was applied as undiluted and fresh. Ash and lime were chosen as drying agents for maintaining a pH > 10 during the drying process, which should inhibit urea hydrolysis in urine, and thereby urea should be retained in the drying agent. The drying technique was developed and drying capacity of the system was quantified; three specific temperatures (20 °, 35 °, 60 °C) and two airflow rates (1 L/min and 5 L/min) were used in the experiment. A mass balance for nitrogen in the system was obtained. It was evident from the experiment that urea can be retained by maintaining a high pH (>10). Urine drying at 20 °C was not a feasible option, since rate of evaporation was very low. The highest retention of inflow nitrogen at 35 °C and 60 °C were 74% and 54%, respectively, in the produced fertilizer. Reduced evaporation rate, flooding of urine over drying agent, and blockage in airflow influenced nitrogen loss and concentration of nitrogen in the final product.

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