Solar Bubble Dryer®

A Green Drying Technology

Drying is the critical first step in preserving the quality of agricultural commodities. Immediate drying of grains and seeds to the correct moisture content (MC) is an effective post-harvest practice that minimizes fungal growth and infestation. Sun-drying is the most common method used in the tropical and sub-tropical regions of the world. The process is simple and relies on free solar energy. However, it is very dependent on weather conditions. Climate change makes weather very unpredictable and unexpected rainfall can result in delayed drying, re-wetted grains and quality deterioration. This leads to damages that reduce the market value of the commodity.

To address these problems, GrainPro, in close collaboration with the International Rice Research Institute (IRRI) and the University of Hohenheim (UOH) Germany, introduces the Solar Bubble Dryer® (SBD®): a modern drying innovation that minimizes the effects of unpredictable weather to commodities during its drying stage.

The SBD® is designed to safely dry agricultural commodities against unexpected rain and other common contaminants. Its transparent polyethylene (LDPE) cover is UV and water-resistant to safeguard the commodities as it dries. It acts like a bubble that traps solar radiation to heat the commodities. Moisture is then vaporized and pushed out by ventilators (which also maintain the shape of the bubble).

The drying floor is made of a proprietary watertight material to prevent water permeation from below. The top cover and the drying floor are joined together by heavy-duty zippers.

The SBD® can dry grains and seeds at an average drying rate of 1% MC per two (2) hours for paddy and corn. During sunny weather conditions, the drying rate could be faster than conventional sun-drying.

The SBD® comes in two sizes. The SBD25™ has a drying area of 25m2, while the SBD50™ has a drying area of 50m2. They come in either solar or electric models. Solar models rely on purely solar power to run ventilator(s). It comes with a charge controller to re-charge the battery (sold separately). Alternatively, an electric-powered model can be powered by electricity from the grid.

 

KEY FEATURES:

• A safe and innovative drying solution designed to protect commodities from unpredictable rains.

• Multi-crop dryer for various agricultural commodities such as paddy, corn, coffee, and others.

• Prevents grain spillage losses and other unhealthy contaminants.

• Collapsible materials and detachable components make it easy to transport and assemble on any flat surface.

• Can be operated on purely solar or electric power.

• Comes equipped with a rake mixer to easily mix grains when drying.

 

PRODUCT SPECIFICATIONS

PARAMETERS SBD25  SBD50
SOLAR ELECTRIC SOLAR ELECTRIC
Total Length, m (ft) 15.0 (49.21) 26.0 (49.21)
Total Width, m (ft) 2.0 (6.56) 2.0 (6.56)
Drying Area, m² (ft²) 25.0 (269.1) 50.0 (538.2)
Capacity, kg (lbs)* 500 (1102.31) 1000 (2204.62)
Packed Dimension, m (ft) [L x W x H] 1.10 x 0.90 x 0.31 (3.61 x 2.95 x 1.02) 1.10 x 0.90 x 0.27 (3.61 x 2.95 x 1.02) 1.10 x 1.00 x 0.40 (3.61 x 3.28 x 1.31) 1.10 x 1.00 x 0.32 (3.61 x 3.28 x 1.05)
Packed Weight, kg 53 (116.85) 43 (94.80) 83.0 (182.98) 63.0 (138.89)
COMPONENTS D E T A I L S
SBD25 SBD50
SOLAR ELECTRIC SOLAR ELECTRIC
SBD BODY Top Cover UV-LDPE UV-LDPE
Drying Floor Reinforced PVC Reinforced PVC
Zipper Heavy Duty Zipper Heavy Duty Zipper
ELECTRONIC COMPONENTS Transformer** N/A Step Up (110V-220V) N/A Step Up (110V-220V)
Wiring Harness #14 Auto Wire (black and red) #14 duplex wire #14 Auto Wire (black and red) #14 duplex wire
PWM Pulse Width Modulator DC Motor Speed Controller N/A Pulse Width Modulator DC Motor Speed Controller N/A
Connectors / Terminals MC4 Bullet, terminal block N/A MC4 Bullet, terminal block N/A
Outlet N/A 2 gang receptacle outlet N/A 2 gang receptacle outlet
Plug N/A Heavy-duty plug N/A Heavy-duty plug
SOLAR PANEL Charge Controller 12 V/10 A N/A 12 V/10 A N/A
Solar Battery*** Deep Cycle Solar Battery, 70 AH N/A Deep Cycle Solar Battery, 70 AH N/A
Unit(s) 100 W, 1 unit N/A 100 W, 2 units N/A
VENTILATOR Voltage 12V DC 220V AC 12V DC 220V AC
Frame Aluminum Bars Aluminum Bars
Unit(s) 1 1 2 2
MIXING Rake Mixer Plastic Rake with Aluminum disassembled handle Plastic Rake with Aluminum disassembled handle
Tube Mixer*** (Roller) 2.4 – 2.6 G.I. pipe, 2” diameter 2.4 – 2.6 G.I. pipe, 2” diameter
*Based on paddy
**Transformer included for countries with 110V electric power supply
***Sold separately as an optional purchase

Product Gallery SBD50® Featured on National-TV SBD25® Video SBD25® Instructional Video SBD50® Instructional Video


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