Now children, if you are going to learn science, sometimes you just have to do some things that might seem a little boring, we can't be making gunpowder and coating your coins with mercury and dripping acid on your friends homework every day!
So today we practically fell asleep looking up the capacities of wind turbines and fans on the web. It wasn't easy, and then we converted them all into the same units! Then we climbed all the way up to the Asoke BTS and took this picture of all those turbines whizzing away in the stiff afternoon breeze! Then we went to get a beer in the pub!
Here they are, diameter in inches and manufacturers rated capacity (cubic meter per second) for various wind velocities.
| Performance Data | |||
| diam inch | wind vel, km/hr | cm/sec | |
| axial fan | 9 | 0.15 | |
| axial fan | 16 | 0.90 | |
| axial fan | 14 | 0.63 | |
| turbine | 32 | 6 | 0.58 |
| turbine | 18 | 6 | 0.23 |
| turbine | 12 | 8 | 0.16 |
| turbine | 32 | 16 | 1.29 |
| turbine | 6 | 6 | 0.05 |
| turbine | 18 | 16 | 0.47 |
| turbine | 24 | 10 | 0.94 |
| turbine | 20 | 6.4 | 0.80 |
| turbine | 20 | 15 | 1.25 |
| turbine | 6 | 16 | 0.13 |
Now here is your homework:
What would you rather have if the wind velocity is 1 meter per second: a one square meter open window on each side of the room (assuming it has two sides) or eight 12 inch turbines as shown?
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