24-08-2012, 11:35 AM
Wind & Solar Powered Street Lamp
Wind & Solar Powered Street Lamp.pdf (Size: 223.3 KB / Downloads: 120)
Wind Turbine for hybrid system
1. The hybrid.
The solar panels can only work average 3 hours a day under
sunshine. In the raining day and in the night, when solar PV can not
work, we can expect the wind turbine.
Compare with the solar (only) street lamp, a hybrid system can
reduce the expensive solar PV, and makes the battery charged in
most kinds of weather.
2. How much power does an MW-400 wind turbine output?
One important thing of a wind turbine is its cut-in speed. For example:
Many wind turbines’ cut-in speed is above 3m/s. That means it can output ‘0’ when the wind-speed is
below 3m/s.
The cut-in speed of the MW-400 is 2.1m/s as it has low cogging alternator, and 6 blades makes it high
torque. If the wind in that area is always 2-3m/s, it also can work and charge the battery. Sometimes it
can work hours more than the above.
One characteristic of the MW wind turbine is that it works well at lower wind-speed. The
MW-400 can supply 35AH a day to the 24VDC battery bank in the average wind-speed of
5m/s.
3. The weight vs. the installation.
The weight of the wind turbine and the solar PV is important when concerning the intensity
and the rigidity of the pole. The MW-200 wind turbine is 8.5 Kg, and the MW-400 is 10 Kg.
They are easy to install and light enough.
As the wind turbine can supply more power, the solar PV can be reduced.
The project in Beijing Olympic 2008
In the summer of 2007, Beijing decide to try more renewable power to make a ‘Green
Olympic’. The plan is to install 8,000 to 10,000 solar powered street lamps in the suburb,
near the Great Wall. In the past 3 years, this city has already installed 1,000 to 2,000 such
solar powered street lamps. They work ‘OK’. But the solar panels have to be 200W or more.
And the batteries are always large (300AH above) to storage more power to resist the
Wind & Solar Hybrid Street Lamp Project
MacroWind Renewable Power Inc. Shanghai, China
MacroWind Small Wind Turbine Factory, Wuxi, China
www.macro-wind.com
cloudy and rainy weeks.
The problem is that the weather in Beijing is not good enough. So the solar panels and the
battery bank have to be big and cost much.
We suggest our hybrid system to the municipality. Our windmill is light enough and easy to
install. It even needn’t to change the pole of the old kind solar street lamp, just need to weld
a short pipe on the top of the pole for windmill to set up.
We get an order of 100 Hybrid powered street lamps for a road near a Village called Cai Jia
Wa.
1. Requirement: