Stand Alone Water Wheel Low Speed Surface Aerator Chaipattana RX-2-3, Controller System

Abstract

Water wheel low speed surface aerator Chaipattana Model RX-2-2 was the 9th patented aerator in the world. The patent was granted to the late king of Thailand, King Bhumibol Adulyadej, with Patent No. 3127 February 2nd, 1993, Water wheel low speed surface aerator Chaipattana Model RX-2-2. This model powered by induction motor 2 HP (1.5 kW) 380 VAC 50 Hz 1,450 RPM with warm gear and sprockets. Water wheel low speed surface aerator Chaipattana Model RX-2-2 widely used in Kingdom of Thailand with standard aeration efficiencies (SAE) of 0.7-1.2 kgO2.kWh-1. However in many instances it had no access to conventional power. Rural people could not afford for electical bills. Solar powered aeration would meet these requirements, without a battery powered storage, lower power consumption, longer operation time, low cost, easy to operate, lighter, and easy to transportation. The aim of this project was to develop a system that has lower power consumption, 0.25 HP (200 W) operate with solar power without battery. It could operate at least 8 hours. Water wheel low speed surface aerator Chaipattana Model RX-2-3 was developed. This model is capable of transferring oxygen at SAE up to 1.5-2.1 kgO2.kWh-1. This new design was developed a solar controller that match motor with solar cell for optimum performance.