PDKV Solar Insect Light Trap

It consists of a SPV panel and lead acid battery. Solar panel used to charge the battery during day time. It consists of charge controller, dusk to down electrical circuit, adjustable stand and 5 W, UV-a blue light for insect attraction. Operating hours are 6 h per day during 4.00 h to 6.00 h and 18.00 h to 22.00 h. One solar insect light trap is sufficient to cover an area of 2 Acre. It does not involve use of electrical energy from grid. Solar insect light trap can be used in the garden, orchard, vegetable and all seasonal crop.

Tractor powered portable briquetted machine for agro-residue

It is a simple, convenient and efficient flat die and roller type pelletizing machine of approximately 50 kg/h capacity for agro residue material. The

Mini Solar Tunnel Dryer

• Consisted of a hemi-cylindrical metallic frame structure of size 1.6´1´9 m) covered with UV stabilized polyethylene sheet of 200 micron thickness.
• To create natural draft inside the dryer, chimneys are provided on the top of dryer.
• North wall is also provided to boost up natural convection.
• Adequate provisions to reduce heat losses from the floor
• The capacity of drier is 10 kg in batch.
• It is techno-economically feasible for drying of spirulina (Algae), wheatgrass, red chilli, turmeric slices etc.

Biomass based air heating system with rotating trays for drying agricultural produce

• A system consist of: (1) A biomass combustor with hot air generator and (2) A cabinet dryer with rotating trays (drying chamber)
• The biomass heated air rotary tray dryer can be favourable as it works during off sun-shine hours.
• It reduces average drying time compared open sun drying and also it can maintain the colour value, water activity and organic constituent of the product.

PDKV solar powered refrigerator using nano-refrigerant

• A 60 litre capacity vapor compression refrigeration system powered by solar photovoltaic, battery bank and inverter is designed to operate for 24 hours. The system can be used with refrigerant R-134a (tetra-fluoroethane) and nano-refrigerant (R-134a + 0.5% Al2O3).
• The SPV powered refrigerator able to maintain the temperature as specified by the WHO for the vaccine preservation (2 to 8°C). The solar photovoltaic refrigerator system is capable for cooling the vaccine for 24 hours of a day.
• The SPV powered refrigerator normally works with the use of nano-refrigerant, which provide higher COP as well as lower power consumption.

The maximum per cent power saving of 10.63 in winter and 13.33 in summer season was found by using the nano-refrigerant over the refrigerant R-134a.

Agricultural waste fired drying system retrofitted with solar dryer

• A solar biomass hybrid drying system consisted of: (1) A solar cabinet dryer (drying chamber) and (2) A biomass combustor with hot air generator.
• The system maintains nearly 60°C temperature during night time; hence it could be used for drying operation during off sunshine hours.
• It could be used for continuous drying of medicinal plants.
• The time required for drying of Shatavari, Ashwagandha and Red Chilli sample in this system were found as 13h, 12h and 28 h, respectively.
• The system was found economically feasible for drying of medicinal as well as agricultural crops.