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EV Kombis

Discussion in 'Performance' started by Voltwagen, Jan 9, 2019.

  1. saabman

    saabman Well-Known Member

    Messages:
    4,888
    Location:
    Goulburn
    I guess the noise from that would resemble a kombi ;-)
     
  2. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
    Careful...
    People are going to believe that .

    Just like putting a wind generator on your kombi roof to generate power while driving to run the electric motor. :rolleyes::D
     
    paul77 and Voltwagen like this.
  3. saabman

    saabman Well-Known Member

    Messages:
    4,888
    Location:
    Goulburn
    Personally I think a mr Fusion is the answer
     
  4. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
  5. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    22,220
    Location:
    Bracken Ridge, Qld
    Got this emailed to me - a bit of light entertainment on battery powered cars -

     
    oldman, cbus, Voltwagen and 1 other person like this.
  6. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
    On the economics side.
    Seat of pants figures but my punt is a bay will need18- 20kwh at the wheels to travel 100km @100km hr.

    Some comparative figures give around 20kwh for small / mid sized EV as a battery to wheel figure.
    https://en.m.wikipedia.org/wiki/Electric_car_energy_efficiency

    Or 30kwh batt to wheel on syncro.
    https://www.evwt.org/?lightbox=dataItem-jdkcpyrb1
    Data from mixed first drive over long distance.

    So while the motors may be up to 93% efficient under lab conditions that is only peak efficiency.
    Just one of many estimates including car mag tests and govt economy stats which are close.
    https://matter2energy.wordpress.com/2013/02/22/wells-to-wheels-electric-car-efficiency/

    Quote..
    a rough estimate of the total round-trip tank to wheel efficiency is:

    0.90 (motor and drivetrain) x 0.95 (inverter) x 0.90 (battery) x 0.95 (charger) = 73%

    This number jives quite well with the claims of Tesla, which quotes a 75% round-trip efficiency. Tesla and Leaf owners report slightly lower real-world charging numbers, with the charger and battery portions of the cycle on the order of 80 to 85%. If we use those numbers we get:

    0.90 (motor and drivetrain) x 0.95 (inverter) x 0.8 (battery and charger) = 68%

    Unquote.

    I still consider the motor and inverter numbers peak but let's work on the 70% as a start point.
    Current state of the art factory products.

    Therefore we multiply the "at wheel" 20Kwh @ 70% and get 28.6 KWh at plug/ meterbox.
    At current qld price from grid, normal household supply. 0.26c.KWh.
    (Ignoring line charges)

    28.6Kwh x $0.26. = $ 7.43 per 100km hwy. @100kmhr.

    Common range for bay.
    ( maintained)
    Hwy@100kmhr

    12 l/100km
    10.7 l/100km best figures.
    Current best 91 Octane@ $ 1.21/l
    95 Oct. $ 1.33.
    12 x 1.21= $14.52.
    12 x 1.33= $15.96
    10.7x1.33= $14.23

    Going by Phil's recent numbers T3 seems comparible on good fuel.

    https://forums.kombiclub.com/threads/fuel-consumption-98-ron-vs-95-ron.57960/

    My t3 and bay are about same on LPG.
    12/ l.100km hwy and mixed .petrol.
    15 same conditions LPG.
    Best 13/ l.100
    Rich./winter. 16 l/100km
    Current best $0.81 /litre lpg.

    15x0.81=$12.15
    Room.for lpg system improvement.


    Tinbits 2.2 suby in split.
    From memory.
    7.6 l/100 travelling with kombis. 95-100?
    8.5 ish@110 and not gentle.

    8x1.33=$10.64.
     
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  7. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
    Jeeze I do shut threads :)

    Alternatives on power supply.

    Some quick links, prob not best, to start discussion.

    Off peak $0.15 c.kWh.
    https://www.canstarblue.com.au/electricity/perth-electricity-prices/


    Solar

    https://www.solarchoice.net.au/blog/solar-plus-battery-storage-perth-wa

    https://www.rpc.com.au/pdf/Solar_Radiation_Figures.pdf

    https://www.solarquotes.com.au/panels/cost/

    Have considered the options for a long while and if I do get off my butt to do anything it will be improve aerodynamics of the brick and a mild hybrid.
    Turbo off vw or Subaru motor can gain about 2kWh at hwy running.
    ( a few car manufacturers looking at systems to capture waste energy of exhaust ) this is simplest.
    This goes into battery and back to crankshaft via belt driven electric ancillery motor.
    Also gives boost on acceleration.
    Switching exists.
    Some control parameters needed.


    https://x-engineer.org/automotive-engineering/drivetrain/transmissions/drivetrain-losses-efficiency/

    https://x-engineer.org/automotive-e...d-hybrid-electric-vehicle-mhev-architectures/

    There are university papers showing energy recovered from turbo and conditions needed.
    Similarly improvements to drag .
    One involves air jet's at rear boundary layer.
    Could be fairly inconspicuous compared to other mods and run from cold side of turbo.
    Up to 20% reduction drag.

    Combination of both cost effective improvement in overall economy narrowing gap between operating cost of full electric vs petrol /LPG.

    Maintain ing driveability in all scenarios.ie includes long distance, energy recovery, improved mileage, use of solar input without committing to initial large establishment costs and structure.

    Anyone familiar with turbo's ?

    https://www.mdpi.com/2076-3417/7/4/350/pdf

    I see an issue with kombi exhaust temps being too low to develop good regerative power.
    Any input?
     
    Last edited: Jan 28, 2019
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  8. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,507
    Location:
    Avalon Beach NSW
    5hit Col......Australia Day long weekend is for destroying brain cells, not bringing logic to the table.......
    ...hang on a sec., you’re a Kiwi...............nah, can’t go there.....;)
    Cheers,
    Mark :p
     
  9. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
    Things are much more obvious when pissed :)
     
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  10. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    22,220
    Location:
    Bracken Ridge, Qld
    Just Col's way of trying to destroy others brain cells :confused:
     
  11. Voltwagen

    Voltwagen Member

    Messages:
    30
    Location:
    Perth
  12. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
    Fingers crossed its not another 7 year cycle of " releases" before we see one ¿ :oops::D
     
  13. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
    Just imagine if he got out of first gear :)

     
  14. KahunaKombi

    KahunaKombi Super Moderator Staff Member

    Messages:
    22,220
    Location:
    Bracken Ridge, Qld
    It has more than 1 forward gear :eek:
     
  15. Barry

    Barry Well-Known Member

    Messages:
    5,862
    Location:
    Abbotsford NSW
  16. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
    Despite being a strong critic of the wannabe van , I like this.
    Styling works.
    Clever move to have body removable from platform as in original beetle.
    Has potential in a lot of variants.
     
  17. syncro

    syncro Well-Known Member

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    Location:
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  18. Barry

    Barry Well-Known Member

    Messages:
    5,862
    Location:
    Abbotsford NSW
    It’s a new VW

    What possibly could go wrong?

    One thing - it could be involved with diesel-gate
     
  19. cbus

    cbus Well-Known Member

    Messages:
    13,444
    Location:
    sunshine coast
    A tradesman. ;)
     
  20. syncro

    syncro Well-Known Member

    Messages:
    10,219
    Location:
    Southern Highlands
    Yeah right:rolleyes:

    Just like the VW specialist for Newcastle that never knew that there was a resistor in the rotor button.
     

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