Australian Volt

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marcopolo
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Australian Volt

Post by marcopolo » Tue, 01 Mar 2011, 20:12

The reason for the lengthy delay in commencing to build the GM Volt in Australia, rather than just importing US built RHD versions, may be found in the technical aspects of the US design : eg;

We know from GM's Susan Stevenson that, in cold weather, the Chevy Volt "requires as much energy to heat the interior of a car on a cold day as it does to drive at a constant speed." Because of this, GM spent a lot of time designing the Volt's HVAC system to handle grueling winter weather while minimizing battery drain.

Testing has been conducting a long-term test of a Volt and, in the latest update, MT has compiled some interesting data on winter driving with Chevy's EREV. It seems the HVAC system does more than simply equalize the air temperature to what is set on the climate control. It was found that when the heater was set to 75F, the cabin temp stabilized at something closer to 65 degrees. However, the footwell temperature reached about 85 degrees

antiscab
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Australian Volt

Post by antiscab » Wed, 02 Mar 2011, 00:55

interesting.......

given that this is Australia....why do we care?

I don't think I have owned a car yet that could produce a uniform temperature in the cabin....
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
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marcopolo
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Australian Volt

Post by marcopolo » Wed, 02 Mar 2011, 06:50

[quote="antiscab"]given that this is Australia....why do we care?[quote]

We don't, but GM having designed an EV to cater for Northern hemisphere winters may consider the Aus/asian RHD market,as a lessor priority.

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Mesuge
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Australian Volt

Post by Mesuge » Tue, 08 Mar 2011, 03:18

Cabin (heating xy m3 of leaking air and vehicle steel/plastics) v. individual body heat, yet again. You can drop the needed energy for getting human comfort temp by dozens of factors just by applying heated boot/seat pads/gloves/vest/jacket. Simple, clever, fun and ~cheap. Usually, the best effect combo is just go after the torso + extermities, i.e. heated vest + gloves (+ shoe pads for hardcore winter time).

But that's out of the traditional "luxury box" thinking, where onboard heater is supposed to be blasting 100k BTUs for hours, so alternatives not widely used.. Image

The same for cooling via water cirulating channels inside fabric/vest or various other solids cooling pad technologies (from cpu area). If chinese fighter pilots and russian kosmonauts had it 50yrs ago, why not now, the kits are out there and not that expensive.

But there is also the HVAC system for the batt. pack, that's rather hard to improve beyond current technology in terms of price/effect/weight ratio.
Last edited by Mesuge on Mon, 07 Mar 2011, 16:37, edited 1 time in total.
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marcopolo
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Australian Volt

Post by marcopolo » Tue, 08 Mar 2011, 05:46

Yes, but for the rest of us on planet earth, trying to sell a car with that kind of thinking might be just a wee bit difficult!

antiscab
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Post by antiscab » Tue, 08 Mar 2011, 12:06

heated seats and steering wheels aren't too far out (no special clothing required).

some American vehicles have airconditioning vents built into the seat, so they are moving in the "right" direction :)
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells

marcopolo
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Australian Volt

Post by marcopolo » Tue, 08 Mar 2011, 16:35

Heated seats are a good idea since it allows individual control, and doesn't add to drowsiness.

However, windscreens still have to be heated etc.. and for Australia air-conditioning has become a standard feature.

In the early 1980's, evaporative cooling was trialled for buses and large transport, but the drivers found refilling the water tanks burdensome and with the easing of petrol prices, preferred to spend spend money on refrigerated systems.

Since then truck and bus cabins have ceased to be made in Australia. Most large vehicles, are imported with refrigerated air-conditioning fitted as an integral item.

This is regrettable because the evaporative system had health benefits for the driver as well as the environment.

I used to have a 1947 Hudson 'woody' station-waggon fitted with an evaporative cooler. The device was a long tube fitted to the left and side of the roof, and worked very well. The unit was a US import designed for the south-west of the US where evaps go by the unattractive name of 'swampies'.

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