Current Issue ( Vol. : 5, Issue: 4, October- December 2017)   

Author: Ankit Singh, H.S. Sahu
Keyword: Karanja. Jatropha, Mahua, Palm, Soybean, Performance.
Page No: 157-161
Abstract: Several woks have already been done in production of biodiesel from edible oils. In developing countries like India where consumption and cost of edible oil is very high, the biodiesel production fro m edible oils does not seems to be economically feasible. But biodiesel production from non-edible oils is economically feasible due to less consumption and cost of non-edible oils. However a lot of work has also been done on non-edible oils such as Neem, Jatropha, Karanja, and Mahua not much work has been reported on biodiesel production from Karanja oil. Limited amount of work has been done on the optimization of biodiesel production and the evaluation of performance and emission characteristics of diesel engine fueled with karanja biodiesel. Keywords: Karanja. Jatropha, Mahua, Palm, Soybean, Performance. Download PDF

Author: M.A.Gaidhani and Alka Thakur
Keyword: Turbine, variable speed wind turbine, wind energy conversion systems, permanent magnet synchronous generators.
Page No: 162-166
Abstract: To cope up with challenges of power demand and supply gap it’s essential to deal with the advancement in the field of renewable energy with highest potential. In country like India where the power sy stem restructuring and advancement in energy sector is taking rise in recent years, so it’s great opportunity to have a system with the isolated operation due to variations in the geographical conditions. In this work a wind mill technology with the isolated operation is presented of 8.5kW, for residential purpose. The direct drive PMSG (permanent magnet synchronous generator) type of generator is used, which is suitable for the variable kind of wind speed. A performance of the PMSG is studied under the different wind speed conditions with the adequate control mechanism. As due to change in the speed of wind the voltage and current changes, these variations are avoided by means of adjusting the control signal PWM provided to the buck boost converter. With the lead acid battery a constant DC voltage level is maintained at the input terminals of inverter. 11 level inverter topology is used to avoid the harmonics contents in the output side with passive LC filter. For optimal power from the wind turbine and to ensure maximum efficiency MPPT block is used which improves the reliability of the system. The simulation study is carried out based on MATLAB/Simulink to validate the proposed system control algorithms. Keyword: Turbine, variable speed wind turbine, wind energy conversion systems, permanent magnet synchronous generators. Download PDF