A review on solar drying of agricultural produce


Solar drying of agricultural produces has long been used for preserving the produce at farmer’s end. However, there are several disadvantages of solar drying too. Degradation in food quality is common as the produce is directly exposed to solar radiation.


How does solar drying work in agriculture?

Citation: Tiwari A (2016) A Review on Solar Drying of Agricultural Produce. J Food Process Technol 7: 623. doi: 10.4172/2157-7110.1000623 pump a solid gas reactor coupled with a condenser or an evaporator. decomposition takes place. During the production phase, the liquid- in the evaporator. At the same time, chemical reaction between the

What are the contemporary models of agricultural drying?

Basic definitions are given. The development of contemporary models of drying of agricultural products are traced from the earliest reported sorption and moisture equilibrium models through the single kernel of product models to the thin layer and deep bed drying analyses.

Does thin layer solar drying affect quality characteristics of Iranian rice?

A thin layer solar drying method was compared with a traditional method (sun drying) of paddy drying, with their effects on quality characteristics of two varieties of Iranian rice (Kamphiroozi and Sazandegi) studied. Solar drying process was conducted in a passive, mixed mode type solar dryer at about 50 º C for 90 minutes.

Can small scale dryers be used to dry agricultural crops?

… The small scale dryer can be used to reduce the risk of spoilage of large quantity of agricultural crop due to weather as well as the solar dryer can be utilised for drying fruits and vegetables. The quality of dried products is found far better than sun-dried, as crops are not in direct contact with sunlight (Tiwari, 2016).


What is solar drying in agriculture?

The basic function of a solar dryer is to heat air to a constant temperature with solar energy, which facilitates extraction of humidity from crops inside a drying chamber.

What is solar drying method?

Solar drying in a tunnel dryer is a stepwise process which mainly depends on fluctuating solar radiation. – During daytime the product is dried, during the night the drying process is interrupted. – The drying process is significantly accelerated by heating the air in the solar air heater.

What are the advantages of sun drying?

Advantages of solar dryers Drying is faster because inside the dryer it is warmer than outside. 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 product is protected against flies, pests, rain and dust.

What is solar drying in food preservation?

Drying preserves foods by removing enough moisture from food to prevent decay and spoilage. Solar drying is done in an enclosed space where the air in contact with it is heated by solar radiation. By heating the air its humidity is reduced and thus its effectiveness as a vehicle for removal of moisture is increased.

What are the main applications of solar dryer?

The solar dryer is also used for medicinal plants, cashew, paddy, mushroom, tea leaves, coffee beans, marine food, tobacco, wheat, seeds and many more applications wherever hotair is needed.

What is solar drying advantages and disadvantages?

Advantages: The advantages of solar drying over open sun drying are, 1) Contamination of product due to enclosure with transparent cover is less. 2) Offer protection from rains, dews, debris etc. 3) Product quality obtained is higher than open to the sun drying.

What are the advantages and disadvantages of drying?

Drying is the process of removing excess water keeping the nutritive value, speed visibility, and further use….Disadvantages of artificial dryingThe method is costly.Needs skill labour.Needs a large amount of initial investment.Co-operating cost is required.

What are the disadvantages of sun drying process?

Drying the food product under natural sunny conditions is called as sun drying. No energy is required for the drying process….Types of Drying.AdvantagesDisadvantagesNo energy is requiredSlow drying process Time taking Molding of food may occur due to slow drying Cannot be carried out in dust, rainy weatherMar 13, 2012

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