Solar Mango Dryer

Solar Mango Dryer

The mango harvest season has duration of 3 – 4 months. During this season apart from selling mango for fresh consumption, a major portion of the harvest is converted into pulp to cater the need of juice making and other value addition purpose. The pulp has a shelf life of more than a year even without air-conditioning. Mango leather/jelly is one of a delicacy product having a good market demand. Presently this product is prepared by drying the pulp at 60 Deg C.

Why Solar

By using solar heated air at 60 Deg C , the firewood consumption for the Drier could be reduced. The solar heating unit saves fuel consumption around 60 to 80%.
The system doesn’t need big maintance except cleaning of glass which takes two hours of two workers for every week.
The switching over from solar heating to conventional heating during rainy day is very easy.
In nutshell the working of the system is satisfactory and it saves fuel consumption.

What is the PEN solution

A 55m2 area solar collector generated sufficient hot air to dehydrate in 8 hours around 120 kg of mango concentrate. This unit has a back up heating with bio- mass fuel. This project will handle a minimum of 30 tones of fruit concentrate per annum and create employment of 1500 man-days per year. These kinds of unit could be replicated throughout the country mainly on the mango and other fruits growing areas.


M/s. Eswari Srinivasa Food Products , Andhra Pradesh


Latest Achievement :-
A 720m2 CPC successfully installed at Hatsun Agro Pvt Ltd, Salem
A 550 kW grid type powered to Santosa Feed Plant factory near Palani owned by (HATSUN AGRO)
A 270m2 solar air heater partially funded by UNIDO as per for reduced coal consumption in a leather auto sprayer in Kanpur.
Roof mounted 10000 liters solar hot water system for leather tannery partially supported UNIDO in Kanpur has been successfully installed.
Graphite Processing.
TAMIN invites PEN for innovation in graphite processing.
Dr.C. Palaniappan has been requested by MED-BIS to frame solar dryer standards.
Solar Dryer
2 numbers of 150 kg solar dryer was sent to Nairobi, Kenya
Solar Heating
North East Tea Gardens are keen to adopt PEN’s energy saving methodology through solar heating.
Solar Air Heater
Solar air heater for tea at Golden Hill Tea Estate near Coonoor, Niligiris installed in 1992 still works ( 21 years) creating a new record in the Renewable energy sector.
Solar Power Project for TMB Bank
Tamilnad Mercantile Bank, basing upon the successful working of solar power project Pandaravilai Branch has entrusted 3 new branches namely Usilampatti, Odaipatti and MM Kovilur (Dindugal).