The drying of hydrogel films formed by poly(ethylene oxide)-poly(propylene oxide) (PEO-PPO) block copolymers (Pluronic P105 and Pluronic L64) is investigated at various air relative humidity (RH) conditions in the range 11-94%. These amphiphilic block copolymers self-assemble to form a variety of ordered (lyotropic liquid crystalline) structures as the water content decreases. The amount of wat...

Drying of solid particles is generally divided into three periods: a short initial heating period, a constant drying rate period, and a falling drying rate period. Drying in a fixed under various drying conditions was experimentally studied. The main goals of the measurements were to calculate the heat transfer coefficient based on the measured values, and to evaluate the validity of the consta...

Modelling solar drying rate of waste-water sludge Ido Seginer* and Markus Bux 1 Civil and Environmental Engineering, Technion, Haifa, Israel 2 Agricultural Engineering, University of Hohenheim, Germany *Corresponding author. Fax: 972 4 829 5696; E-mail: segineri@tx.technion.ac.il Efficient solar drying requires that the drying rate is quantitatively known as a function of the environment and th...

The drying characteristics of green peas were examined in a microwave dryer for power level of 20,40 and 60W. The green peas were pretreated with citric acid solutions and blanched with hot water at 85C before drying. The drying process was continued until sample moisture fell to equilibrium moisture content. The blanched samples dried faster than those in other pretreatments and control condit...

Drying is one of the essential unit operations performed to increase the shelf life of agricultural or horticultural produce and it is one of the most practical methods of preserving food and the quality of agricultural produce [1]. Traditionally, fish food produce are dried by spreading in open sun in thin layer and smoking using wood. Though this method is economical and simple, it has the dr...

Ł. Jamrozowicz, J. Zych, J. Kolczyk, AGH University of Science and Technology, Faculty of Foundry Engineering, Kraków, Poland Investigation results of the drying rate of the selected protective coatings (water and alcohol) are presented in the article. Coating drying rate was determined for the first and second layers. The coating was applied to moulding sand cores. The rate of drying coatings ...

introduction: one of the most important aspects of food preservation is controlling the moisture of material such as fruits.dryingis considered as important method to controlbacteriasafely using reduction of moisture. the hot air drying method has been widely adopted in manufacturing of conventional dried food.nowadays, infrared radiation (ir) has significant advantages over conventional drying...

in this paper the energy and exergy analyses in chamber drying process of thin layer drying of tomato in a forced solar drying was investigated. the experiments were carried out with two thicknesses of 5 and 7 and two airflows 0.5 m.s-1 and 1 m.s-1. during the experimental process, ambient temperature was between 22 and 36 , air relative humidity between was 14 and 50, and solar radiation range...