1 easy to assemble 2 cheap available materials can be used 3 simple to operate maintain and control and 4 light in weight.
What are the advantages and disadvantages of solar crop dryers.
Solar greenhouse dryers are available in different size and design and are used for drying various crops and.
It has also advantages that crop are protected from dust rain insects animals etc.
Drying is faster because inside the dryer it is warmer than outside.
Advantages of solar dryers.
This technique changed very little from its early.
1 a flat plate air heater and 2 a drying chamber.
Uv protection of solar dryers maintains colors and nutrients of fruits and vegetables.
The dryer consists of a parabolic roof structure covered polycarbonate sheets on a concrete floor.
Direct solar drying has some disadvantages concerning both quality and quantity due to losses attacks by insects etc thus in recent years direct sun drying is replaced by mechanical dryers heated indirectly by solar energy.
This type of solar dryer has two parts.
In hot arid climates the collector may not even be necessary.
Relative advantages and disadvantages of cabinet type direct solar dryers are.
However this requires a great deal of management in maintaining the equipment and monitoring when the grain needs to be move from one dryer to the next and it also increases the grain handling that s needed.
It is labour saving.
Its advantages are you have increased drying rate overall and drying capacity and increased energy efficiency.
Advantages and disadvantages of direct solar drying.
1 color deterioration of green fruit during dehydration and 2 decomposition of residual chlorophyll in the tissue under direct solar radiation.
Air is heated in the flat plate heater placed on the roof of the building or on the ground.
Timber can be dried to any desired low moisture content by conventional or solar kiln drying but in air drying moisture contents of less than 18 are difficult to attain for most locations 2.
More sophisticated solar dryers protect grain and fruit reduce losses dry faster and more uniformly and produce a better quality product than open air methods.
Less risk of spoilage because of the speed of drying.
If the drying process is slow the fruit start to ferment and the product is spoilt.
The basic components of a solar dryer are an enclosure or shed screened drying trays or racks and a solar collector.
Greenhouse solar dryer for drying macadamia nuts.
A solar dryer in which solar energy collection and drying take place in separate units is known as a distributed solar dryer.
