Electric car with the wind mill


by akkiakshay
Tags: electric, wind
akkiakshay
akkiakshay is offline
#1
Feb25-12, 01:50 PM
P: 1
I am mechanical engineer and working on a project of electric car havin a wind mill on the top.
i am using 7 lead acid batteries and a DC series wound motor. The car has a wind mill for the recharging of the batteries.
I have read other thread on this forum which states that the wind mill on the car is not a productive idea.
so whether it will be a good idea to use the wind mill only at the time when the car is parked. so that drag doesn't cause any work loss??
and how much size and the power wind mill i should be using???

Any relevant input will help
Phys.Org News Partner Science news on Phys.org
Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cyber risks can cause disruption on scale of 2008 crisis, study says
Mantis shrimp stronger than airplanes
Mech_Engineer
Mech_Engineer is offline
#2
Feb27-12, 12:59 PM
Sci Advisor
PF Gold
Mech_Engineer's Avatar
P: 2,234
If you are a mechanical engineer as you claim to be, you should go through a simple thermodynamic analysis which shows your system and where the power inputs are. You'll find that the only way the windmill can "provide" power to the system is for it to sap it from the car's speed as wind drag, and this speed has to have been added to the car by the engine. This means your windmill is just adding drag to the system and not providing power.

You're wasting your time, save yourself the embarassment and stop while you're behind.
berkeman
berkeman is offline
#3
Feb27-12, 01:05 PM
Mentor
berkeman's Avatar
P: 39,683
Quote Quote by akkiakshay View Post
I am mechanical engineer and working on a project of electric car havin a wind mill on the top.
i am using 7 lead acid batteries and a DC series wound motor. The car has a wind mill for the recharging of the batteries.
I have read other thread on this forum which states that the wind mill on the car is not a productive idea.
so whether it will be a good idea to use the wind mill only at the time when the car is parked. so that drag doesn't cause any work loss??
and how much size and the power wind mill i should be using???

Any relevant input will help
If you want to use the wind to help recharge the batteries when the car is stationary, that could work. However, it would take a pretty large windmill, and it would need to be pretty windy. You could have a stationary windmill at your home, for example, that you plug your car into when it is parked. You would definitely not want the windmill out in the windstream while you were driving!


Register to reply

Related Discussions
wind scaling and increasing wind speed for wind tunnel problem Mechanical Engineering 3
Wind Power Vehicle Traveling Down Wind Faster Than The Wind General Physics 305
Governing in case of Wind mill General Physics 2
wind mill Mechanical Engineering 2
Determine the Electric Power Produced by a Wind Turbine Over a Range of Wind Speeds Advanced Physics Homework 5