Comparison on VAWT and HAWT of 200w – 100Kw

1       efficiency                                   50-60%                   more than 70%

2.   Magnetic disturbance

     ( carbon brush )                                yes                               no

3   parts taking the wind                      needed                    no requirement

4   speed gear box                    needed for 10Kw and above         no

5   space for the running blade            bigger                               smaller

6   capacity of wind

    Protecting                                       weak                       strong ( 25-35m/s )

7   noise                                             35-60 db                           no

8   starting wind speed                   high ( 2.5-5m/s )              low ( 1.5-3m/s )

9   projection interference

    on human being                             dizziness                              no

10 stoppage                                     higher                              lower

11 maintenance                               complicated                        simple

12 speed                                          higher                              lower

13 interference on bird                       bigger                            smaller

14 damage on the cable and

Carbon brush                               yes                                  no

15 power curve                             in hollow                             stable

16 shake                                           yes                                   no