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- Fossil Fuel Free (https://ecomodder.com/forum/fossil-fuel-free.html)

- - Team Trev (https://ecomodder.com/forum/showthread.php/team-trev-13948.html)

Any vehicle that uses just 70wH/km (113wH/mile) is pretty impressive, indeed!

Team Trev

Very LARGE picture
http://teamtrev.files.wordpress.com/.../batteries.jpg
http://teamtrev.files.wordpress.com/2010/04/acnu1.jpg
http://teamtrev.files.wordpress.com/2010/04/tray_6.jpg

They will be participating in the Zero Race:

Quote:

Trev is powered by the wind
2010-07-19 · 1 Comment

A requirement of our participation in Zero Race is that we source 100% green power for our drive around the world. Being an electric car powered by renewable energy, our circumnavigation will effectively be emission free.

In reality, we will be charging from various electric grids along our circumnavigation route, and the energy we consume will be a mixture of coal, nuclear, hydroelectric, wind and solar generation. In effect we’ll be consuming a mixture of renewable and non-renewable energy but offsetting that with 100% renewable energy.

Trev requires approximately 70 Wh/km, so a 30,000km trip will consume approximately 2,100kWh (2.1MWh) of energy.

New Zealand based utility TrustPower has kindly donated this amount of green power to Team Trev, in the form of Renewable Energy Certificates and a cash donation. The energy will be sourced from TrustPower’s 98.7MW Snowtown Wind Farm in South Australia. This wind farm consists of 2.1MW wind turbines, so the amount of energy required to drive Trev around the world is generated by a single turbine in just one hour (at full power).

http://teamtrev.files.wordpress.com/...snowtown64.gif

nice...i was checking the website and am quite impressed...how come no teams from the US ?

I think this car was featured on Autospeed.com as well.

Also it figured prominently in a "how to" piece about lightweight composite construction.

They have newer information on the energy consumption: it is just 6.2kWh/100km which is almost exactly 100Wh/mile (just under), driving at 8090kph (50-55mph). This is even better when you know they used a brushed DC motor (21kW) from a Vectrix (sp?) which is not as efficient as an AC induction motor or a brushless permanent magnet motor; and it does not have regenerative braking.

Trev (two-seater renewable energy vehicle)

Two part article on building this <800 pound two seat car:

http://www.autospeed.com.au/cms/A_110989/article.html

http://www.autospeed.com.au/cms/A_110990/article.html

Slideshows for the two articles:

http://www.autospeed.com.au/cms/gall...0&a=110989&i=2
http://www.autospeed.com.au/cms/gall...0&a=110990&i=2

http://www.trevipedia.net/index.php?title=Main_Page is great.

Especially the 'lessons learnt' PDF. I see lots of X's in the discussion of suspension, steering and brakes. They lament not having a source for tires narrower than 165mm. 125-15s have been around for ages, for the Citroen 2CV or something.

Do you know enough about the project to speculate about some things?

The canopy. There are products like Liquid Armor and Nanopool that give a coating of nano-scale glass particles. These (they may be one thing) give a paint-on glass finish on anything. Has anyone tried this?

Ingress and egress. There's only side impact protection on the off side. Is that door a stressed member?. Wouldn't cut down side and two gull-wing doors be safer?

How do you think their controller compares to the Open Revolt that has its own forum on Ecomodder?

Quote:

Originally Posted by freebeard (Post 350175)

Especially the 'lessons learnt' PDF...

"Summary" part is what's this all about :thumbup:

I got a great response to some questions I asked - they are quite helpful folks and acknowledge their challenges. They mention that they need to reconfigure the battery by moving it forward, so the Trev can stay stable at speed with two people aboard.

Contact | Team Trev

Quote:

in response to neilblanchard:

Quote:

What capacity is the battery pack, and what cells does it use? Is it located in the front in the floor, and how far back does it extend? Were there any stability issues with two people and/or luggage; and have you ever run a double lane accident avoidance test? Here in the States this has [...]

Trev’s original battery was 36 40 Ah lithium ion polymer cells, with a total energy of 5.5 kWh and a range of about 100 km. For Zero Race, we used 35 100 Ah lithium ion polymer cells, with a total energy of 13 kWh battery and a range of over 200 km.

The original battery was in the front compartment. The larger battery is in a tray beneath the floor, and extends from the nose of the car to about the front of the rear seat.

We have passed a lane change test at about 90 km/h, though that was with only one person in the car. Directional instability is noticeable at high speeds with a passenger; this could be improved by moving the rearmost cells back into the front compartment.

We drove from Darwin to Adelaide with one occupant (400 kg total mass) at about 80-90 km/h. The energy required to recharge Trev on this trip was 62 Wh/km.

We have a 12 V hair dryer pointing at the windscreen as a defroster. It is usually adequate with one person in the car, but does not clear the sides of the canopy (we have a cloth). We have an air intake on the front of the car, which we have to close when it is cold or wet; this needs to be improved. We are going to add small fans to blow air onto the driver and passenger for days when it is over 35 Celcius.

The top of the canopy (made by a sail plane builder - can you tell?) is probably just over 4' high - and its the apex on a very sleek dome. Improving the Cd by 0.01 would be much more meaningful.

http://w3.unisa.edu.au/solarcar/imag...es/trev_07.jpg

That looks like a 14" Honda rim to me? If so, the tire would be about 2' and the apex of the canopy would be about 4'-3" above the ground.

Here's a photo with three people (one short, one average, one tall):
http://w3.unisa.edu.au/solarcar/imag...enfleet_01.jpg

Here it is with some school age kids:
http://w3.unisa.edu.au/solarcar/imag...enfleet_02.jpg http://w3.unisa.edu.au/solarcar/imag...enfleet_05.jpg

http://w3.unisa.edu.au/solarcar/imag...es/trev_03.jpg

These people are bent over to look in, and they are still taller than the car:
http://w3.unisa.edu.au/solarcar/imag...es/trev_04.jpg

I had a long Skype conversation today with Gary Krysztopik (who is building the EZ EV) and he has seen the Trev in person, when he hosted the Zero Race team at his house - it was parked in his garage, and he says it is a tiny car.

Here's the Fully Charged episode that gives an excellent glimpse into the Trev - that has already been driven around the world!

I hope that they build a Trev v2.0, to address the Cg and possibly improve the Cd, as well. They've shown the strengths of this design, and they are open and honest about the weaknesses. I hope they will release dimensional drawings and/or 3D CAD models.