Abstract
In this study, a new efficiency improvement method by means of air injection into Pelton turbine jet is presented. In order to analyze air injected jet performance, firstly, micro size 5kW Pelton turbine was designed and analyzed. Similarly the analysis was carried out on a small size 100kW turbine. For the 100kW Pelton turbine, 5kW model was scaled up based on the jet diameter and rotational speed. 5kW performance analysis was performed under several rotational speed. After achieving optimized rotational speed. Air injected jet analysis was performed for rated rotational speed condition. Air injection rate was 1%, 5%, 10%, 15% of the water volume flow rate. Efficiency increase rate was reliable. The 100kW turbine was designed in two types, one jet and two jets systems. Air injection rate was made same and also found to have a reliable increase in efficiency.
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