Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-16-2008, 10:44 PM   #11 (permalink)
ECO-Evolution
 
Lazarus's Avatar
 
Join Date: Nov 2007
Location: Central Texas
Posts: 1,482

Iron Horse (retired) - '97 Iron horse Intrepid

Ninja - '08 Kawasaki 250R
90 day: 76.23 mpg (US)
Thanks: 17
Thanked 43 Times in 32 Posts
I'll throw mine in here for some more data if someone wants to figure it out since I'm smart enought. It consistantantly takes 3.7 hours to recharge after a 26 mile ride with assist and a average speed 19 mph.

So if it charges at 46 watts/hour and takes 3.7 hours thats 170.2w

26 miles
.170kw to recharge

6.55 wh/m

__________________
"Judge a person by their questions rather than their answers."

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-17-2008, 02:40 AM   #12 (permalink)
Master EcoModder
 
Ryland's Avatar
 
Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,904

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
Thanks: 867
Thanked 432 Times in 353 Posts
I don't have charger numbers, just amp meter and volt meter numbers from the bikes on board meters, cruseing up and down my mostly flate road my very rough amp average is 12, with my voltage droping to 28 volts, my speed is averaged at 22mph with a 27mph top speed (digital bike speedometer) without pedaling and starting from a dead stop.
so I have 12 amps times 28 volts (poorly built 32v pack) is 336 watts while crusing at 22mph comes to... 15 watts per mile, I haven't used it enough to have charging numbers, but my DeWalt batteries that are going on in the spring take 100 watts (Kill-a-watt meter) each to charge a 79.2 watt hour battery pack... yes I know there is some fuzzyness in there, right now my driveway and road are both covered with ice, when that changes I'll get better numbers, but from what I can tell my 22mph crusing speed uses a nice 15 watts out of the battery, ad 20% for charging, then a little more for float and self discharge, and it's I figure 20-22 watts per mile is a safe number... pretty close to Metro's number.
I have a brushless 3 phase motor, so it's a more efficent design then the schwinn, and more powerful to boot, from a dead stop going up a hill without pedaling I've seen the amp meter jump to 28-30 amps or around 1,000 watts.
  Reply With Quote
Old 02-17-2008, 07:54 PM   #13 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,845

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.51 mpg (US)
Thanks: 2,682
Thanked 5,585 Times in 2,866 Posts
Quote:
Originally Posted by Lazarus View Post
I'll throw mine in here for some more data if someone wants to figure it out

6.55 wh/m
By my calculations, that works out to 5130 mpg (US) equivalent. You're obviously doing a lot of assist!
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 02-17-2008, 09:29 PM   #14 (permalink)
ECO-Evolution
 
Lazarus's Avatar
 
Join Date: Nov 2007
Location: Central Texas
Posts: 1,482

Iron Horse (retired) - '97 Iron horse Intrepid

Ninja - '08 Kawasaki 250R
90 day: 76.23 mpg (US)
Thanks: 17
Thanked 43 Times in 32 Posts
Quote:
Originally Posted by MetroMPG View Post
By my calculations, that works out to 5130 mpg (US) equivalent. You're obviously doing a lot of assist!
Yes and no i do hypermile the pack. It's just like driving the car. I engauge once I get up to speed, off on descents and hills.
__________________
"Judge a person by their questions rather than their answers."

  Reply With Quote
Old 02-22-2008, 09:16 PM   #15 (permalink)
Modding for Eris
 
Thalass's Avatar
 
Join Date: Dec 2007
Location: North Bay, Ontario, Canada
Posts: 129

SilverCivic - '08 Honda Civic
90 day: 28.69 mpg (US)
Thanks: 39
Thanked 11 Times in 8 Posts
So what would the formula be to convert kWh/mile into mpg? Or kWh/km into L/100km.
__________________
Making do with a Honda Civic. Tesla Model 3 reserved. Still kinda want an SVX for fun, though.

  Reply With Quote
Old 02-23-2008, 04:53 PM   #16 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,845

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.51 mpg (US)
Thanks: 2,682
Thanked 5,585 Times in 2,866 Posts
Conversions:

1 kWh = 3412 BTU
1 gal (US) gasoline = 114,500 BTU
The bike went 8.7 km (5.41 miles) on 0.12 kWh

0.12 kWh = 409.44 BTU (0.12 * 3412)

409.44 BTU = 0.003576 gal (US) (409.44/114,500)

5.41 mi / 0.003576 gal (US) = 1512.9 mpg (US) equivalent

You can do the mpg/L 100k conversion.

So I guess the formula for mpg (US) equivalent is:

mi. / kWh * 3412 / 114,500
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 02-23-2008, 05:32 PM   #17 (permalink)
Master EcoModder
 
Join Date: Jan 2008
Location: Sacramento, CA
Posts: 320
Thanks: 19
Thanked 92 Times in 68 Posts
Quote:
I saw an E-bike that ran off a couple of DeWalt Lion batteries - that was pretty cool too!
Might have been my bike. Built it as soon as I was able to get hold of the batteries at a reasonable price a year and a half ago. As far as I know, it was the first seventy two volt Dewalt setup in the country. That has been long surpassed now and some of my ebike friends are building their own BMS's and chargers for the A123 cells that are used in the Dewalt chargers.
All right. Can't figure out how to load images here. I think I have it as an attachment though.

As for MetroMPG's formula it helps to remember that we can cancel labels when we do the math.

For example: 1 mile/20Whr x 1000Whr/3412 BTU x 114500 BTU/1 Gallon

These are all conversion factors except for the first term which is an actual measurement from one of my own rides. You can see that the Whr terms and the BTU terms will cancel when multiplied out and all that is left is numerical values and miles/gallon. From there it's just a simple matter of punching the numbers into a calculator.
JJ
Attached Thumbnails
Click image for larger version

Name:	FULL BIKE.JPG
Views:	97
Size:	44.7 KB
ID:	377  
  Reply With Quote
Old 02-25-2008, 11:08 AM   #18 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,845

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.51 mpg (US)
Thanks: 2,682
Thanked 5,585 Times in 2,866 Posts
Thanks for correcting my laziness, JJ. I can still hear my high school physics teacher shouting, "UNITS!!!"
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 02-25-2008, 07:59 PM   #19 (permalink)
EcoModding Lurker
 
Join Date: Feb 2008
Location: Ithaca, NY
Posts: 34

Low Roller - '94 Honda Civic VX
90 day: 52.85 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Wow, I didn't realize they were quite that efficient. I've got to get on that and get one built. Some days when it is sunny, we have extra power from our pv panels, that could be put to use in this manner. For some reason I thought that they would need to be charged w/250 watts for 10 hours or something rediculous.
  Reply With Quote
Old 02-25-2008, 11:43 PM   #20 (permalink)
MP$
 
diesel_john's Avatar
 
Join Date: Jan 2008
Location: SW Ohio
Posts: 591
Thanks: 5
Thanked 14 Times in 12 Posts
Send a message via MSN to diesel_john
Smile

I think you may end up quoting miles per dollar or miles per KW-hr to compare with any energy source because the power plant is burning some fuel at 30 to 40% efficiency by the time it get to the battery. So we might want to stay away from any miles per gallon numbers. Evenually miles per unit of energy from any source will be similiar i suppose but until then miles per dollar is about as fair as you could get. Even windmills and pv panels cost dollars. What do you think about this approach?
How do we add enviromental costs to this?


Last edited by diesel_john; 02-26-2008 at 10:10 PM..
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine efficiency improvement through higher temp thermostat? Lazarus General Efficiency Discussion 23 09-16-2015 02:27 AM
How my home-built bicycle trailer lowers my MPG MetroMPG Alternative Transportation 17 03-30-2012 07:15 PM
First ride on a (semi-)recumbent bicycle: BikeE - got a CCM Evox 120 MetroMPG Alternative Transportation 20 11-14-2011 08:29 AM
Equivalent MPG of cycling - garage feature? MetroMPG Alternative Transportation 21 12-27-2007 01:57 AM
Forkenswift equivalent MPG Lazarus Fossil Fuel Free 6 12-13-2007 11:11 PM



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