Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-12-2008, 08:50 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Aug 2008
Location: Dayton
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Steam engine (from exhaust heat)

Has anyone built a small steam engine that could be run from the heat of a car's exhaust manifold? The steam engine/turbine would be used to power a generator/alternator.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 08-12-2008, 09:19 PM   #2 (permalink)
EcoModding Apprentice
 
Join Date: Jul 2008
Location: Potsdam, NY
Posts: 136

The Vue - '03 Saturn Vue
90 day: 25.34 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
arent steam engines typically... massive

and the energy requirements to keep even a small amount of water would be quite high. It also wouldnt work right away. you would have to boil off the water first, and this wouldn't work in cold weather.

I'm kinda ranting but i think its probably more problems than its worth.
__________________


  Reply With Quote
Old 08-12-2008, 09:45 PM   #3 (permalink)
Mr. Blue Tape
 
azraelswrd's Avatar
 
Join Date: Jun 2008
Location: Fresno, CA
Posts: 345

AzxA - '06 Scion xA
90 day: 42.72 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
Mercedes and a few others have been working on ways to recapture the heat as reusable energy. Stirling engines were an early favorite but they have their own issues.
__________________


My 5 pillars of fuel efficiency:
  • driving style
  • aerodynamics
  • tires
  • weight reduction
  • engine maintenance
  Reply With Quote
Old 08-12-2008, 09:54 PM   #4 (permalink)
Ecoformance Engineer
 
Vince-HX's Avatar
 
Join Date: Jun 2008
Location: Arizona
Posts: 239

EJ7 - '96 honda civic Hx
Last 3: 58.02 mpg (US)
Thanks: 0
Thanked 3 Times in 3 Posts
what kind of issues with the Sterling engines?

I've been researching them recently and they seem like a great way to reclaim a bit of heat energy.



I would love to make a big version of this one and stick it on my roof. Plenty of sunshine round here
__________________

70 mpg or die modding

www.full-race.com

Quote:
Originally Posted by MetroMPG View Post
looking forward to seeing what kind of uber-sipper slinks out of the full race skunkworks.
  Reply With Quote
Old 08-12-2008, 10:33 PM   #5 (permalink)
aerostatic
 
Join Date: May 2008
Location: Sioux Falls, SD
Posts: 5

Blue - '04 Chevrolet Impala LS
90 day: 29.57 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Stirling engines have been making some headway lately, mostly being used in solar energy and for marine propulsion/secondary electricty. The main problems are the size to power ratio, potential temperature difference, pistion seals, and engine controls, specifically engine pressure control. The working solar commercial models that I have seen have used molten sodium-- but more practically for automotive use the working fluid would be helium. Plain air could also be used, like the original stirling, but there have been problems with the lubricants oxygenizing and causing explosions. Nasa acutally did some automotive testing with stirling engine for main propulsion in the late 70's and early 80's in a chevette.
  Reply With Quote
Old 08-12-2008, 11:35 PM   #6 (permalink)
Master EcoModder
 
FastPlastic's Avatar
 
Join Date: May 2008
Location: Ames, IA
Posts: 419

98 Cherokee - '98 Jeep Cherokee
90 day: 17.18 mpg (US)

ZX7R Ninja - '99 Kawasaki ZX7R Ninja
90 day: 42.45 mpg (US)
Thanks: 4
Thanked 13 Times in 12 Posts
I think this is something that is definitely worth looking in to. Especially if you could pull enough power out of it to replace the alternator.

If you use steam would you have to have the boiler inspected?
__________________

Adjusted for my driving habits. 80%city/20%Highway.
20mpg city/30mpg highway or bust! Check out my mods so far
  Reply With Quote
Old 08-13-2008, 12:14 AM   #7 (permalink)
Mr. Blue Tape
 
azraelswrd's Avatar
 
Join Date: Jun 2008
Location: Fresno, CA
Posts: 345

AzxA - '06 Scion xA
90 day: 42.72 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
I doubt it can replace the alternator but I can see it replacing an A/C or even for some kind of regenerative charging system for hybrids. Love that prototype in the video -- but I know when people hear "hydrogen" they automatically think of Hindenburg-like images of immolation and fiery coffins of doom.

...guess they didn't know about fuel cells or metal hydride release systems.
__________________


My 5 pillars of fuel efficiency:
  • driving style
  • aerodynamics
  • tires
  • weight reduction
  • engine maintenance
  Reply With Quote
Old 08-13-2008, 12:44 AM   #8 (permalink)
Addicted
 
bbjsw10's Avatar
 
Join Date: Jul 2008
Location: Findlay,OH
Posts: 555

bbjsw10 - '91 Geo Metro Xfi
90 day: 51.06 mpg (US)
Thanks: 0
Thanked 10 Times in 7 Posts
That demonstrator is cool even to just play with make an rc boat out of it.
__________________
  Reply With Quote
Old 08-13-2008, 06:52 AM   #9 (permalink)
EcoModding Lurker
 
Join Date: Aug 2008
Location: Dayton
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by azraelswrd View Post
I doubt it can replace the alternator but I can see it replacing an A/C or even for some kind of regenerative charging system for hybrids. Love that prototype in the video -- but I know when people hear "hydrogen" they automatically think of Hindenburg-like images of immolation and fiery coffins of doom.

...guess they didn't know about fuel cells or metal hydride release systems.
So along with these from azrael:
driving style
aerodynamics
tires
weight reduction
engine maintenance

I think we should add steam to the list for a small inexpensive method to reclaim some of our energy. Even in cold whether it should work -- provided you use a shroud to keep some of the air out of the engine compartment. Add a solar reflector to the game -- and POW -- we are getting H-O-T.

We should keep thinking small, inexpensive mods -- because once things get to elaborate they don't make sense from a financial perspective.
  Reply With Quote
Old 08-14-2008, 10:21 PM   #10 (permalink)
EcoModding Lurker
 
Join Date: Aug 2008
Location: Dayton
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Looks like BMW is building a gas / steam hybrid.

BMW Developing a Steam/Gas Hybrid Engine : TreeHugger

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Converting Exhaust Heat to Electricity SuperTrooper General Efficiency Discussion 13 03-20-2010 07:03 AM
1992 Metro sedan needs a new engine - What/Where/How - advice appreciated greatly! Crono EcoModding Central 26 11-18-2008 02:42 AM
Heat engine block for efficiency? bennelson EcoModding Central 43 08-12-2008 10:45 PM
Moving air intake into the engine compartment? pasadena_commut Aerodynamics 5 07-25-2008 04:24 PM
Coasting experiment: engine on VS engine off on a fixed route = 12.9% gain MetroMPG Hypermiling / EcoDriver's Ed 6 02-22-2008 09:38 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com