Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-14-2009, 07:57 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Jul 2009
Location: Washington
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Windbelt / Humdinger to generate power

Sorry as this will be slightly off tread... it is about drag and utilizing it to get better mpg though. Has anyone heard of the windbelt (humdinger)? I was thinking that it might be possible to utilize a windbelt on the back end of your car in an area of turbulence to supplement a hybrids electrical power. I got the idea while watching the myth busters mpg show with the ford trucks with the tail gates down episode. As they demonstrated a circular airflow in the bed of the truck. if such an airflow could be utilized to power 5 windbelts and gain a 5w output per windbelt for a total of 25w what would that equate to in terms of mpg for the car? i suppose its an incremental change really...

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-14-2009, 08:10 PM   #2 (permalink)
Old Retired R&D Dude
 
Join Date: May 2008
Location: Woburn Mass USA
Posts: 701

Little Red - '12 Toyota Prius c 2 Two
90 day: 57.82 mpg (US)

"Whitey" Bulger - '14 Toyota RAV4 LE
Thanks: 10
Thanked 18 Times in 17 Posts
Watts

Quote:
Originally Posted by Quiz View Post
Sorry as this will be slightly off tread... it is about drag and utilizing it to get better mpg though. Has anyone heard of the windbelt (humdinger)? I was thinking that it might be possible to utilize a windbelt on the back end of your car in an area of turbulence to supplement a hybrids electrical power. I got the idea while watching the myth busters mpg show with the ford trucks with the tail gates down episode. As they demonstrated a circular airflow in the bed of the truck. if such an airflow could be utilized to power 5 windbelts and gain a 5w output per windbelt for a total of 25w what would that equate to in terms of mpg for the car? i suppose its an incremental change really...


Those watts have to come from somewhere, and since the car is moving,
making wind as it were.. Those belts will add drag.

Will that drag on the ICE be equal to the wattage gained?
Nope, the conversion losses will eat it up some.

Want some free power, add an aerodynamic solar PV panel..
__________________
Cheers,
Rich

Current ride: 2014 RAV4 LE AWD (24 MPG)

Wife's Pizza Transporter
  Reply With Quote
Old 07-14-2009, 08:13 PM   #3 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,891

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,426
Thanked 2,914 Times in 1,827 Posts
Hello & welcome to EM,

25watts is not worth trying for -- you could save more than that by changing out the lightbulbs for LED's. Anything that adds to drag will still be a net loss, because any wind generator is less than 100% efficient. Otherwise, you would have invented a perpetual motion machine -- which we both know is impossible...
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 07-14-2009, 11:47 PM   #4 (permalink)
Master EcoModder
 
Join Date: Jan 2009
Location: Maui, Hawaii
Posts: 813
Thanks: 5
Thanked 34 Times in 26 Posts
Maybe he's on to something. He's talking about extracting energy from the turbulence, not the airstream
  Reply With Quote
Old 07-15-2009, 12:57 AM   #5 (permalink)
Old Retired R&D Dude
 
Join Date: May 2008
Location: Woburn Mass USA
Posts: 701

Little Red - '12 Toyota Prius c 2 Two
90 day: 57.82 mpg (US)

"Whitey" Bulger - '14 Toyota RAV4 LE
Thanks: 10
Thanked 18 Times in 17 Posts
Quote:
Originally Posted by winkosmosis View Post
Maybe he's on to something. He's talking about extracting energy from the turbulence, not the airstream

Much of the air flowing around the car is going to be turbulent.

But, it really doesn't make much difference if it's smooth air
or turbulent air, if you stick something (an object) into a place
where fast moving air is going to hit it, so it can pick up wind energy,
that device is going to product extra drag.
__________________
Cheers,
Rich

Current ride: 2014 RAV4 LE AWD (24 MPG)

Wife's Pizza Transporter
  Reply With Quote
Old 07-15-2009, 11:01 PM   #6 (permalink)
Master EcoModder
 
Join Date: Jan 2009
Location: Maui, Hawaii
Posts: 813
Thanks: 5
Thanked 34 Times in 26 Posts
Quote:
Originally Posted by Xringer View Post
Much of the air flowing around the car is going to be turbulent.

But, it really doesn't make much difference if it's smooth air
or turbulent air, if you stick something (an object) into a place
where fast moving air is going to hit it, so it can pick up wind energy,
that device is going to product extra drag.
But following that logic, a spoiler that protrudes into vortices to smooth airflow would create more drag just by having air hit it, which isn't the case
  Reply With Quote
Old 07-15-2009, 11:41 PM   #7 (permalink)
Old Retired R&D Dude
 
Join Date: May 2008
Location: Woburn Mass USA
Posts: 701

Little Red - '12 Toyota Prius c 2 Two
90 day: 57.82 mpg (US)

"Whitey" Bulger - '14 Toyota RAV4 LE
Thanks: 10
Thanked 18 Times in 17 Posts
Quote:
Originally Posted by winkosmosis View Post
But following that logic, a spoiler that protrudes into vortices to smooth airflow would create more drag just by having air hit it, which isn't the case

"so it can pick up wind energy".. By that I mean something that converts
the air flow into electrical power measured in watts used.
Those watts are coming from the ICE.

I didn't really mean to imply that a stationary airfoil would be a big drag.

However, a spoiler airfoil does have drag. It can cause more fuel to
be burned, if it's not the right size, installed in the right location, at the right angle etc..

If you had a car with a real good cd and started installing big spoilers on it,
that might work out real well..


My guess is, many spoilers are just fuel wasters.. But they look really cool..

__________________
Cheers,
Rich

Current ride: 2014 RAV4 LE AWD (24 MPG)

Wife's Pizza Transporter
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Power Steering delete for fuel economy gain - anyone done it? bennelson EcoModding Central 92 01-27-2017 04:58 PM
Converting power steering to electric power steering Daox EcoModding Central 54 01-17-2017 07:16 PM
Why We Have No Wind or Solar Power SuperTrooper General Efficiency Discussion 220 07-20-2011 11:37 PM
Diesel Power Magazine Disappointment. ConnClark EcoModding Central 16 06-05-2009 11:39 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com