energy estimates

altaskier · 08-30-2004, 04:19 PM

For what it is worth, here are some estimates in Wh (Watt-hours), the
unit of energy used for the green leaf on the Prius display.

A gallon of oxygenated gas contains about 36,000 Wh, and a 30% engine
will convert that into 10,800 Wh.

Assuming 80% efficiency of the electric motor, 50 Wh of recovered
energy (one grean leaf) gives you the equivalent propulsive energy
of about 1 tablespoon of gas.

The kinetic energy of a Prius traveling at 60 mph with 300 pounds
cargo is about 150 Wh.

Further details are at
[web]http://xray1.physics.sunysb.edu/~jacobsen/priusenergy.pd[/web]

hdrygas · 08-30-2004, 04:29 PM

That thing is a leaf?!! :crazyeyes: I thought it was a little car icon. I will have to go out and look at it more closely. This is like finding out the real words to a song you have been singing wrong for 20 years!

ops:

DaveinOlyWA · 08-30-2004, 06:20 PM

Henry:

it is a car.

now canadian Priuses might use a maple leaf (wonder where they got that idea??) but here its a car.

**efusco** · 08-30-2004, 09:02 PM

It's a leaf shaped like a car....look closely!

Frank Hudon · 08-30-2004, 10:23 PM

it's a leaf up here too.

DaveinOlyWA · 08-30-2004, 10:29 PM

WRONG!!

its a car. i admit its a car with a weird paint job.

tell me have you ever seen a green car? or even a green car with white stripes??

well i have.

have i seen a leaf shaped like a car??

nope...have you?

Frank Hudon · 08-30-2004, 10:42 PM

take out your 2004Prius Owners Manual Supplement and look at the lower left hand corner at the Leaf Car, that is the indicator.
on the 2k1-3 it's the same symbol just as the picture on the 2k1-3 Supplement Manual upper right hand corner.

DaveinOlyWA · 08-30-2004, 10:47 PM

no no no... remember the old town and country station wagons with the wood paneling of the 60's??

how many of them were accused of being trees?? or plywood?? or lumber of any kind??

so just because the things look like trees OR leaves, dont mean that they are... lets face it, they were still CARS!!

Frank Hudon · 08-30-2004, 10:54 PM

the first time the wife saw a 91 Buick station wagon she said it looked like a sow bug in a plywood plant. The Leaf Car is Toyota's picture of an earth friendly car. I do believe there is a thread on this back in january or february.

DaveinOlyWA · 08-30-2004, 10:57 PM

Quote:

The Leaf Car is Toyota's picture of an earth friendly car.

Thank you Frank!!

i rest my case.

08-30-2004, 04:19 PM	#1
altaskier Join Date: May 2004 Location: Long Island, New York Posts: 157 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	energy estimates For what it is worth, here are some estimates in Wh (Watt-hours), the unit of energy used for the green leaf on the Prius display. A gallon of oxygenated gas contains about 36,000 Wh, and a 30% engine will convert that into 10,800 Wh. Assuming 80% efficiency of the electric motor, 50 Wh of recovered energy (one grean leaf) gives you the equivalent propulsive energy of about 1 tablespoon of gas. The kinetic energy of a Prius traveling at 60 mph with 300 pounds cargo is about 150 Wh. Further details are at [web]http://xray1.physics.sunysb.edu/~jacobsen/priusenergy.pd[/web]

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
New EPA Estimates	mpgFanatic	Fuel Economy	12	05-15-2007 01:11 AM
EPA MPG Estimates	Tom6850	Fuel Economy	32	03-11-2007 05:24 PM
ACEEE updated their estimates on the tax credits	cwerdna	Prius and Hybrid News	1	04-02-2006 10:35 PM
Waiting List Estimates	TechGuy	Prius Main Forum	18	04-26-2005 08:26 PM
Consistantly Exceed MPG Estimates	Keller Prius	Fuel Economy	3	08-06-2004 06:53 AM

08-30-2004, 04:29 PM	#2
hdrygas Senior Member Join Date: May 2004 Location: Olympia Wa Posts: 3,650 My Car: 2004 Prius Package: #9 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	That thing is a leaf?!! :crazyeyes: I thought it was a little car icon. I will have to go out and look at it more closely. This is like finding out the real words to a song you have been singing wrong for 20 years! ops:

08-30-2004, 06:20 PM	#3
DaveinOlyWA Opps !! I Did it Again!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 10,009 My Car: 2006 Prius Package: #4 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 6	Henry: it is a car. now canadian Priuses might use a maple leaf (wonder where they got that idea??) but here its a car.

08-30-2004, 09:02 PM	#4
efusco Troll Slayer Join Date: Nov 2003 Location: Nixa, MO Posts: 14,709 My Car: 2004 Prius Package: #9 Nominated 1 Time in 1 Post TOTM Awards: 0 Friends: 26	It's a leaf shaped like a car....look closely!

08-30-2004, 10:23 PM	#5
Frank Hudon Senior Member Join Date: Jan 2004 Posts: 4,144 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	it's a leaf up here too.

08-30-2004, 10:29 PM	#6
DaveinOlyWA Opps !! I Did it Again!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 10,009 My Car: 2006 Prius Package: #4 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 6	WRONG!! its a car. i admit its a car with a weird paint job. tell me have you ever seen a green car? or even a green car with white stripes?? well i have. have i seen a leaf shaped like a car?? nope...have you?

08-30-2004, 10:42 PM	#7
Frank Hudon Senior Member Join Date: Jan 2004 Posts: 4,144 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	take out your 2004Prius Owners Manual Supplement and look at the lower left hand corner at the Leaf Car, that is the indicator. on the 2k1-3 it's the same symbol just as the picture on the 2k1-3 Supplement Manual upper right hand corner.

08-30-2004, 10:47 PM	#8
DaveinOlyWA Opps !! I Did it Again!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 10,009 My Car: 2006 Prius Package: #4 Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 6	no no no... remember the old town and country station wagons with the wood paneling of the 60's?? how many of them were accused of being trees?? or plywood?? or lumber of any kind?? so just because the things look like trees OR leaves, dont mean that they are... lets face it, they were still CARS!!

08-30-2004, 10:54 PM	#9
Frank Hudon Senior Member Join Date: Jan 2004 Posts: 4,144 My Car: Package: Nominated 0 Times in 0 Posts TOTM Awards: 0 Friends: 0	the first time the wife saw a 91 Buick station wagon she said it looked like a sow bug in a plywood plant. The Leaf Car is Toyota's picture of an earth friendly car. I do believe there is a thread on this back in january or february.