The following projects are commissioned by M/s.Sun Best [ commercial supplier with TIN number]

1. TTK – LIG Ltd., Pondicherry – 2007

2. TTK – LIG Ltd., Virdhunager – 2008

3. Hindustan Lifecare Limited – 2009
Installed at south facing roofing support frame. Special paint coated ‘V’ corrugated absorber and tempered glass – partial double – air underflow Temperature controlled actuator to switch from solar to conventional heating Blower to draw and transport the air

Total area of the collector-: 113 m2

Operating temperature 60-900°C
Fuel savings through solar 50- 60%
Maximum temperature
Pay Back period Around2.5 years
Approximate savings /yr
45000 electrical units
CO2 reduction 19.35 tones
Eastern Mattresses Pvt. Ltd – 2008
Name of the factory——–: Coir Mattress, Kerala
Product———————-: Coir Mattress
Conventional method——: Thermic fluid Boiler – Firewood
Capacity of heating———: 6 lakh kilo calories System

Application of heating
1. Drying out moisture in coir coil using air at 700C.
2. Sheet forming machine-air is heated to 70 -800C.
3. In Vulcanizing machine air is heated up to 1200C.
4. Calendar pressing sheet by contact eat at 1500C.

TI Cycles – 2008


A 297 m2 area solar air heating system was installed, integrating on the south facing roof of the factory. The hot air obtained is drawn by a low electric power (1.5 kW) blower. The hot air is transmitted by insulated metal pipes to the fresh air inlet point of the paint shop drier to preheat the air required for oven.


Automobile components, machine components and other almost all factory made gadgets are made attractive by using paint shop. Surface coating is not only for color, but resistance against exposure to rain, dust, chemicals, radiation and high and low temperatures. In fact paint coating of vehicle components is a complicated and step by step process, resulting in a 5-layer surface. Each of these layers is responsible for some of the various technical aspects like corrosion resistance, smoothing of the metals sheet surface, UV radiation protection, stone chip guard, weather resistance, chemical resistance, scratch resistance, and last but not least: color and gloss . The most important environmental aspect of a paint shop is the energy consumption, mainly air heating for paint curing. Curing air temperature ranges from 80 Degree Celsius to 150 Degree Celsius and fossil fuels are used for hot air generation.

Process flow

Solar Air Heater System

The purpose of solar air heater is to convert atmospheric air into hot air using sun radiation. The paint shop dryer/oven draws cold air and heating the air into 150 Degree Celsius by burning petroleum products. If pre heated air is provided to the dryer instead of cold air the fuel consumption could be reduced. The solar air heater consists of tempered glass, special type of metal absorber and mineral wool insulation. Solar radiation passing through glass heats the metal absorber. The metal absorber transfers the heat to the air. Thus hot air generated from the solar air collector. As there is no moving parts except blower, which is used to draw the hot air for delivery to the dryer through insulated metal pipes, the system will have life time of more than 15 years. The system is being commissioned now and the observed around 7 liters of saving when connected to two dryers. By connecting to the third dryer and by improving its performance by trial runs the savings of fuel cost is Rs.10 Lacks per annum could be achieved. As the Government of India offers capital subsidy and tax incentives, the payback period is less than 2 years. It is estimated that more than 10,000 numbers of large paint shops are currently in operation throughout the industries in our country. More than 2 lakhs square meter solar collector area could be introduced to save our petroleum products.

1. NRDC, Sikkim – 2008

2. Chief Horticulture Office, Ladhakh – 2009

3. Chief Horticulture Office, Kargil – 2009


Food Processing Technology is one of the priority sectors in our country. The technology in solar dryers at micro level in the villages is to help the society. This would be a boon for rural women and youth. This approach finds a solution for not only preservation of food products but also can create a great opportunity for rural employment. The solar dryer technology will process the food products with zero energy cost. The harvesting season for many fruits are of short duration resulting in non-viability (economically) of solar dehydration/drying projects of the fruits. Fruit bar or fruit jelly is one of the by-product which has a shelf life of more than 9 months. The mango fruit concentrate/pulp, if properly prepared and sealed in cans, could be stored at ambient temperature with a life span of more than 12 to 16 months. Hyderabad based NGO, markets cabinet type solar driers of different capacity with SPV fans for drying mango bar and other products successfully. Many number of these solar driers are working throughout the country. A solar drying facility at Eluru near Vijayawada, Andhra Pradesh by an entrepreneur has been successfully demonstrated fast processing of mango bar of large capacity. A 55m2 area roof integrated solar collector generated sufficient hot air to dehydrate in 8 hours around 120 kg of mango bar per day from 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 equal to 1500 man-days per year. These kinds of unit could be replicated throughout the country mainly on the mango and other fruits growing areas.

NRDC, Mizoram – 2009


Under the initiative of MNRE and NRDC – Sun Best had supplied 42 solar driers of capacity around 700 kg and 1000 LPD solar water heater for processing.

Flow process



The drying rate when compared to open drying is minimized by 7 fold. The present trail was done on a cloudy climate with very low radiation. On a sunny day with high radiation the drying rate can be still reduced. The quality of the product is good and hygienic.