Siraj Ahmed

Assessment of wind energy potential using topographical and meteorological data of a site in Central India (Bhopal)

Wind speed data (in metres per second) and direction (in degrees) were recorded at hourly intervals for a period of 1 year from September 2004 to August 2005 at two mast heights of 10 and 25 m. The data recorded were analysed and the regional wind climate determined using the WAsP 8.2 program and a vector map of the region covering 12×12 km. The orography of the area was characterised by elevation contours at 5 m intervals. On the basis of details obtained from the aerial photographic images, the roughness classes were also assigned. The time series wind data were analysed and the Weibull distribution for the two projected heights of 50 and 70 m as per the requirement of the proposed wind turbine generator (WTG) was evaluated. It is seen that the annual energy production in the area from 1 MW WTG is 3.712 GWh at 50 m hub height and 4.431 GWh at 70 m hub height, indicating a satisfactory wind energy generation potential. This paper describes the methodology adopted for the evaluation of wind energy potential for the site.

Effect of Atmospheric Stability on the Wind Resource extrapolating models for large capacity Wind Turbines: A Comparative Analysis of Power Law, Log Law and Deaves and Harris mode

Abstract. To observe accurate wind climate from the available met mast measured wind data at different heights an accurate wind shear model is necessary. Since WAsP and windPRO is software package which provide the better representation of wind profile over homogeneous terrain only. Though, a separate module named as WAsP CFD has been added in both of the software to predict correct wind resource in complex terrain also. Nowadays terrain dependent wind resource model has become a key issue for the researchers. Out of many wind extrapolating model such as PL (power law), LogL (log law), LogLL (Log linear law) and Deaves and Harris Model Log law was found to be a better representation of wind profile. This study presents a comparative analysis of three different wind extrapolation models. Based on one year (2016–2017) wind data from met mast of 10u2009min. interval at 10, 50, 80, 100 and 102u2009m, and the result was compared with the relation of atmospheric stability. The licensed version of WAsP and windPRO software was also used to calculate wind resource parameter such as roughness index and roughness class etc. RMSE and NRMSE was found to be least in case of log linear model which is 0.11 and 0.01784 respectively in compare to PL and Deaves and Harris models.

A preliminary study of wind–solar hybrid systems potential in Jammu and Kashmir

ABSTRACT This paper deals with the study of wind–solar hybrid systems in the region of Jammu and Kashmir. Due to scarcity of less renewable energy resources in the J&K region, National Institute of Wind Energy, Chennai had installed different wind monitoring stations to measure the wind data at different locations. The survey reveals that four districts (LEH, KARGIL, POONCH and REASI) are suitable for small wind–solar hybrid systems. BIDDA (REASI) and CHUSHUL (LEH) are the two sites for small wind farm development due to the highest wind speed (more than 7u2009m/s) and power density (more than 400u2009W/m2) at 100u2009m agl.

Mathematical simulation and energy estimation of 10 kW horizontal axis wind turbine rotor at hilly site of RGPV, Bhopal (Case study)

This paper deals a new method based on analytical approach. The design of rotor and its peak performance production, a blade is divided into 100 radial elements. The blade chord, its twist and its elementary power co-efficient at each station were determined. The iterative process required for the convergence of speed interference factor and for maximization of power coefficient. The design process begins right at maximum power point, rather than searching of point of maximum power and then doing the computations. Mathematical Simulation based on analytical approach for energy estimation correlate with practical reading of 10 kW H.A.W.T rotors at Rajeev Gandhi Proudyogiki Vishvavidyalaya (RGPV), Bhopal and new method developed for the same have been described.