Relative advantages and disadvantages of cabinet type direct solar dryers are.
What are the advantages and disadvantages of solar crop dryers.
It is labour saving.
In hot arid climates the collector may not even be necessary.
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.
1 easy to assemble 2 cheap available materials can be used 3 simple to operate maintain and control and 4 light in weight.
Advantages and disadvantages of direct solar drying.
This technique changed very little from its early.
Solar greenhouse dryers are available in different size and design and are used for drying various crops and.
The dryer consists of a parabolic roof structure covered polycarbonate sheets on a concrete floor.
This type of solar dryer has two parts.
Pankaew abstract this paper presents experimental performance and modeling of a greenhouse solar dryer for drying macadamia nuts.
The basic components of a solar dryer are an enclosure or shed screened drying trays or racks and a solar collector.
Its advantages are you have increased drying rate overall and drying capacity and increased energy efficiency.
It has also advantages that crop are protected from dust rain insects animals etc.
1 a flat plate air heater and 2 a drying chamber.
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.
Uv protection of solar dryers maintains colors and nutrients of fruits and vegetables.
Greenhouse solar dryer for drying macadamia nuts.
Advantages of solar dryers.
If the drying process is slow the fruit start to ferment and the product is spoilt.
A solar dryer in which solar energy collection and drying take place in separate units is known as a distributed solar dryer.
The product is protected against flies pests rain and dust.
Solar dryers in parabolic domes allows water to run along the walls no contamination of goods by water better product quality color skin taste better prices due to better quality higher affordability level better payback power of farmers.
Drying is faster because inside the dryer it is warmer than outside.
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.
