Convective drying is a complex phenomenon which consists of simultaneous heat and mass transfer, liquid and vapor transport, structural and chemical transformations inside the material, and so forth. These issues further create changes in the quality of product and also drying mechanisms.Jan 6, 2020
What are the two types of drying?
Basically, drying can be done by two processes viz. natural drying and mechanical dehydration or artificial drying based on source of energy.Mar 13, 2012
What are the three methods of drying?
- Application of hot air (convective or direct drying). ...
- Indirect or contact drying (heating through a hot wall), as drum drying, vacuum drying. ...
- Dielectric drying (radiofrequency or microwaves being absorbed inside the material) is the focus of intense research nowadays.
What is conduction drying?
Conduction dryers are designed taking into consideration the wet and dry product flow characteristics, lump crust formation tendency and thermal sensitivity of the product in dry condition. ... The dryer conveys as well as dries material; controlling the conveying speed controls the retention time.
What is convection drying?
Convective drying: hot and dry gas (usually air) is used both to supply the heat necessary for evaporation and to remove the water vapor from the surface of the food. From: Food Process Engineering and Technology, 2009.
What is the drying process?
Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from a solid, semi-solid or liquid. ... A source of heat and an agent to remove the vapor produced by the process are often involved.
What is drying with example?
Drying is another common method of meat preservation. Drying removes moisture from meat products so that microorganisms cannot grow. Dry sausages, freeze-dried meats, and jerky products are all examples of dried meats capable of being stored at room temperature without rapid spoilage.
What are the types of drying?
There is a lot of different drying methods. The most common are sun drying, hot air drying, contact drying, infrared drying, freeze-drying, fluidized bed drying, and dielectric drying.
What are appropriate methods of drying?
Water is traditionally removed through evaporation by using methods such as air drying, sun drying, smoking or wind drying, although today electric food dehydrators or freeze-drying can be used to speed the drying process and ensure more consistent results.
What are the different methods of sun drying?
Natural drying takes place under the influence of sunlight and wind and is of three types viz. sun, solar and shade drying. In natural drying there is no control over temperature, air flow and humidity whereas in artificial drying, these conditions are well controlled.Mar 13, 2012
Which is the most common drying method?
Hot air drying
What are the types of drying of food?
- Sun drying. It's hard to think of an older or simpler way to preserve food than sun drying. ...
- Air drying. Like sun drying, air drying is an ancient method of dehydrating food. ...
- Solar drying. ...
- Oven drying. ...
- Electric dehydrating. ...
- Dehydrating in a microwave oven.