What is the principle of tray dryer?

The basic working principle of this incredible machine is the continuous circulation of hot air. In the tray dryer, moisture is removed from the solids that are placed in the tray by a forced convectional heating. The moist air is removal is conducted partially but in a simultaneous fashion.

How does drying process occur in a tray dryer?

In tray drying, a stream of hot gas is passed over a damp solid to vaporize the liquid. The process requires no agitation and allows for control over temperature and other properties. The flexibility of tray drying allows it to be used in chemical, pharmaceutical, and food production prior to packaging.

What is the use of tray dryer?

Applications : Tray Dryers are ideally suitable for drying chilies, spices, papads, potato chips, onions, fish, garlic, grapes, cashew nuts, confectionery, macaroni, wood etc. It is also for used for drying pharmaceuticals, chemicals, powders, granules, plastic granules etc.

What is the process of drying?

Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from a solid, semi-solid or liquid. This process is often used as a final production step before selling or packaging products. Desiccation may be synonymous with drying or considered an extreme form of drying.

What are the objectives of the tray dryer experiment?

LAB REPORT ON TRAY DRYER (L1) 3 f3.0 OBJECTIVES There were several objectives in conducting the experiment: 1) To determine the drying rate and moisture content of the sample through removal of water. 2) The effect of velocity of air on drying rate of the sample by performing drying process.

What is the critical moisture content in a tray dryer?

This point is called the critical moisture content, and a linear fall in the drying rate occurs with further drying. This section, segment BC, is called the first falling-rate period. As drying proceeds, moisture reaches the surface at a decreasing rate and the mechanism that controls its transfer will influence the rate of drying.

How is water removed from a tray dryer?

In the drying process the water is usually removed as a vapor by air. For this experiment, the drying process classified as batch which is the material was inserted into the drying equipment and the drying process proceeds for a given period of time.

What is the purpose of a banana dryer experiment?

The purpose of the experiment is to conduct a drying process on banana fruits in order to determine its drying rate, moisture content, and the effect of velocity of air on the drying rate of the banana. The banana is sliced thinly and arranged in the tray. The mass of banana is weighted before and after the experiment.