Slide 1: Welcome Characteristics of a highly efficient propeller type small wind turbine with a diffuser. : Characteristics of a highly efficient propeller type small wind turbine with a diffuser. By
10AG61R14 Introduction : In recent years, the need to protect the global environment has seen the use of clean energy systems being extended into the telecommunications.
The introduction of wind power devices to the wind –solar hybrid systems is beneficial for obtaining more power.
Scope of wind energy generation in India (45000 MW).
Need of this study Introduction Scope of wind power generation in India : Scope of wind power generation in India Estimated potential – 45000 MW
Installed capacity -5340 MW
Achievement -2980 MW
India stands 4th in the world Slide 7: Fig. 1 Working of wind turbine Objectives : Objectives To simulate the effect of diffuser parameters on the wind speed.
To evaluate the turbine characteristics using field trial device. Simulation method : Simulation method Thermo-hydrodynamic analysis software program, I-DEAS
Entrance diameter (D):1m
Main body length (L):2-4m
Flange length (T):0.1-0.5m
Expansion angle(Θ):0-12° Slide 10: Fig. 2 Schematic cross sectional view of a diffuser and wind speed increase mechanism. Slide 11: Fig. 3 External view of the diffuser. Slide 12: Fig. 4 Analysis of space. Simulation Results : Simulation Results Slide 14: Fig. 5 Example of analysis results Slide 15: Fig. 6 Relation between main body length L and wind
speed ratio. Slide 16: Fig. 7 Relation between expansion angle q and wind
speed ratio. Slide 17: Fig. 8 Relation between flange length T and wind
speed ratios. Objective 2 : Objective 2 To evaluate the turbine characteristics using field trial device Slide 19: Fig. 9 External view of field trial device installed
at test site. Slide 20: Fig. 10 Dimensions of diffuser applied for the field
trial device Slide 21: Fig. 11 Experimental apparatus. Experimental Results and Discussion : Experimental Results and Discussion Slide 23: Fig. 12 Changes in wind speed and output power
characteristics over time (2002/10/19) Slide 24: Fig. 13 Changes in energy production characteristics
and ratios over time (2002/10/19). Slide 25: Fig. 14 Changes in wind speed and output power characteristics
over time (2002/11/16). Both wind turbines were fixed in the same
direction. Slide 26: Fig. 15 Changes in energy production characteristics and ratio over time
(2002/11/16). Both wind turbines were fixed in the same wind direction. Slide 27: Fig. 16 Power curve measured in the field tests. Conclusions : Conclusions 1 We ascertained the effect on wind speed for each of the diffuser parameters (main body length L, entrance diameter D, expansion angle Θ and flange length T). Results showed that the parameters were able to increase the maximum wind speed in the vicinity of the diffuser entrance by around 1.7 times.
2 The fitting of a diffuser improved the power curve and increased the energy production of the wind turbine. A maximum energy production ratio of around 2.4 times was obtained by collecting wind energy in the turbine.
3 The diffuser is useful at sites where the wind direction is comparatively steady, by setting the turbine in the direction of the wind. References : References T. Matsushima, S. Takagi, S. Muroyama Characteristics of a highly efficient propeller type small wind turbine with a diffuser. Renewable Energy 2006,1343–1354.
F. Bet , H.Grassmann Upgrading conventional wind turbines. Renewable Energy 2003,28-71.
www.worldenergy.org – official website of World Energy Council.
Wind resource assessment report Sept. 2005 by Centre for Wind Energy Technology, Chennai. Slide 30: Thank You