Solar Tea Leaves Dryer

Solar Tea Leaves Dryer

Tea industry consumes considerable quantity of thermal energy for processing – Tea industries spent annually 700 – 900 million kg of coal or equivalent in India for processing. Tea industries need hot air for the following applications – Withering – 35 Deg C Firing – maximum temperature for orthodox tea – 110 Deg C and maximum temperature for CTC tea – 140 Deg C. A large quantity of fossil fuel mostly firewood or coal are being used. Apart from emission of green house gases due to burning the fossil fuel, considerable quantity of petroleum products are required to transport fossil fuel to the plantation site.

Why Solar

The fresh air being taken at the heater at room temperature may be heated to 60 Deg C and above so that fossil fuel consumption could be reduced.

What is the PEN solution

PEN had installed 9 air heating units in the tea industry. Many of them are more than 15 years old. It is possible to preheat the air through solar collector to provide hot air of temperature 60 Deg C and more.
This will lead to 25 – 35% reduction in the fossil fuel consumption.
Moreover usage of solar energy for processing will give a value addition to the product especially in export market using the logo Green Processing.


Golden Hills Tea Estate, Coonoor
Glendale Tea Factory, Coonoor


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).