Generators for microhydro power

Abstract

        The Pressure of water for producing the power by using generators for microhydro-power. The permanent magnet generator was improved from Hugh Piggott.The hydro turbines was designed to be the impulse turbines installed outside the water pipe. The runner has 16 vanes. The rectifier was 12VDC 50A   Bride Diode. The charger controller was  the switching transistor which tested the permanent magnet generator by changing the speed of the  generator that impacted with power output.  Supposed the torque of the primover was stable. The variables of this experiment were: to study the height of the water level, the water pressure at the nozzle and power output. The flow was supposed  the uniform flow without emphasis the loss power  in the pipe.

        The result showed that if increase the height of the water level, the water pressure was increased. The production of the power was also increased per day. The peak was at 3m. level, the water pressure watt at 29,504 N/m² and the power output was 655 watt. While as efficiency of the generators  for Micro Hydro power was highest at 1.7 m. level,         77 percentage. The ratio lf trend line was          y = -2.7047 x2 + 9.5935x + 64.314.It showed that the efficiency of  the generator was guile low and the power output wasn’t the highest. Because of it was the  comparision of the mechanical energy from the  water pressure at the end of the pipe and if we need more energy, we have to use more. Actually, the  input power lf the generator was the potential  energy from small dam which let the aster flew in  rainy season and flew for farmers in the dry  season. From the experiment it showed that the power energy was high efficiency when compare with the input power and it suitable for small dam.