Process of Chaipatthana windmill.
Chaipattana Aerator Model A
The water turbine is driven by an electric motor of two horsepower, 380 Volt, 3 Phase, 50 Hz. The power transmission is done with a gear and chains, using manpower to steer
Chaipattana Aerator Model B
The water turbine is driven by 2 gear motors of one horsepower each, 380 volt, 3 Phase, 50 Hz.
Operation
The Chaipattana Aerator is a floating aerator which can be operated in tidal polluted water. It consists of a water turbine frame, 2 meters in diameter, with 12 sides, and 6 trapezoid water turbines and it has a capacity of 110 litres. The turbine, has many drilled holes for diffusion and bails with a speed of 5 m per minute at a depth of 0.5 metres, lifting the water one meter high. There is a higher efficiency due to the greater contact area between the water and the air in which the oxygen can fuse with the water because the polluted water is bailed and crashes again, producing air bubbles. Moreover, since the turbine is being pressed under the water, it will have the air pressure inside so that there is more oxygen evacuation. Afterwards, the water flow from the turbine pushes the water from the aerator to a distance of ten metres away at a speed of 0.2 meter/second.
Furthermore, the floating device moves while it is in operation and this will push the oxygenated water deeper through the action of the installed hydrofoil. This process will cause air filtration and efficient stirring and water will flow out in its own direction, with oxygen being evacuated at 1.2 kilo/horsepower/hour.
Installation
The Chaipattana Aerator is available either in a fixed position or moving along water surfaces such as ponds, swamps or canals which are deeper than one metre and wider than three metres. It can be operated by a motor for the fixed installation connected to an electricity grid. If no electricity is available, a diesel engine will be used to drive the aerator along the water and manpower will steer it into the desired direction.
Supporting Objectives
Because the aerator, invented by the Chaipattana Foundation to oxygenate water is still in the stage of study, research and experimentation to further develop the effectiveness of the aerator, the following supporting objectives may be defined:
1. The Chaipattana Foundation will provide technology and a planning system for water development projects in the public and private sectors and disseminate the use in order to solve environmental problems, the expenses being borne by the public and private sectors.
2. The operating areas would be natural water surfaces such as ponds and canals but exclude polluted water emanating from chemical pollution by factories.
3. The consideration to set up a system for the private sector depends on :
3.1. A sketch map of the location, the size (with the depth of the water not less than 0.50 metres);
3.2. A primary investigation of the water quality (BOD (Biological Oxygen Demand) not less than 150 milligrams/litre)