I need your opinion

DrEskimo

AdrianC said:

DrEskimo said:

Running on veggie oil will have little impact on tail pipe emissions with regard to CO2 (or indeed other emissions).

Apart from the minor detail about short- vs long-term carbon cycles.

Sure, that's why I was very careful about my wording of tailpipe emissions.

As for the arguments for biofuels, it doesn't appear to be as simple as that....

"Annually harvested crops store less carbon than land left abandoned, allowing grasses, trees and  other vegetation and their carbon-storing roots to develop"

"Palm and soy-based biodiesel have LUC emissions that alone exceed the full lifecycle emissions of  fossil diesel"

https://www.transportenvironment.org/publications/globiom-basis-biofuel-policy-post-2020

Perhaps it is biofuels that can be accused of 'greenwashing'....?

Scrapit

DrEskimo said:

AdrianC said:

DrEskimo said:

Running on veggie oil will have little impact on tail pipe emissions with regard to CO2 (or indeed other emissions).

Apart from the minor detail about short- vs long-term carbon cycles.

Sure, that's why I was very careful about my wording of tailpipe emissions.

As for the arguments for biofuels, it doesn't appear to be as simple as that....

"Annually harvested crops store less carbon than land left abandoned, allowing grasses, trees and  other vegetation and their carbon-storing roots to develop"

"Palm and soy-based biodiesel have LUC emissions that alone exceed the full lifecycle emissions of  fossil diesel"

https://www.transportenvironment.org/publications/globiom-basis-biofuel-policy-post-2020

Perhaps it is biofuels that can be accused of 'greenwashing'....?

The two quotes you have dont really add to any argument.
Fallow land stores more carbon than harvested land. Yes, of course. But harvested land removes it in the first place, albeit for a short duration, but generally releases less than was stored. Any land left will store, thats how the carbon cycle worked until carbon capture become an industrial process.
Palm oil and soy based oils are bad because they are a major cause of deforestation. So not greenwashing, just bad examples.

DrEskimo

Scrapit said:

DrEskimo said:

AdrianC said:

DrEskimo said:

Running on veggie oil will have little impact on tail pipe emissions with regard to CO2 (or indeed other emissions).

Apart from the minor detail about short- vs long-term carbon cycles.

Sure, that's why I was very careful about my wording of tailpipe emissions.

As for the arguments for biofuels, it doesn't appear to be as simple as that....

"Annually harvested crops store less carbon than land left abandoned, allowing grasses, trees and  other vegetation and their carbon-storing roots to develop"

"Palm and soy-based biodiesel have LUC emissions that alone exceed the full lifecycle emissions of  fossil diesel"

https://www.transportenvironment.org/publications/globiom-basis-biofuel-policy-post-2020

Perhaps it is biofuels that can be accused of 'greenwashing'....?

The two quotes you have dont really add to any argument.
Fallow land stores more carbon than harvested land. Yes, of course. But harvested land removes it in the first place, albeit for a short duration, but generally releases less than was stored. Any land left will store, thats how the carbon cycle worked until carbon capture become an industrial process.
Palm oil and soy based oils are bad because they are a major cause of deforestation. So not greenwashing, just bad examples.

Gotcha.

The report seems to highlight how any first generation biodiesels have greater emissions, but 'advanced' biofuels look promising. 

Still will take my EV though..just as low GHG, and also zero harmful emissions with regards to air quality.
Not to mention I don't know what the price of advanced biofuels will be? Added 75miles today for £2.45 in my EV.... South East had slightly higher gas usage at 40% so CO2 would have been about 26g CO2/km.

Petriix

Meanwhile the sun added 5kWh to my MG5 battery yesterday and has already added another 1kWh this morning. That's around 24 miles with zero emissions (not even from the grid) and zero cost.

This is the darkest time of the year. In the spring our solar panels often generate > 20kWh in a day, good for around 80 miles. I'm pretty happy with my switch away from diesel.

Grumpy_chap

Petriix said:

Meanwhile the sun added 5kWh to my MG5 battery yesterday and has already added another 1kWh this morning. That's around 24 miles with zero emissions (not even from the grid) and zero cost.

That's amazing given the time of the year!
Is that true free energy for the car, over and above meeting your domestic electricity needs first?

Petriix

Grumpy_chap said:

Petriix said:

Meanwhile the sun added 5kWh to my MG5 battery yesterday and has already added another 1kWh this morning. That's around 24 miles with zero emissions (not even from the grid) and zero cost.

That's amazing given the time of the year!
Is that true free energy for the car, over and above meeting your domestic electricity needs first?

Our panels seem particularly good in the cold and they face pretty close to due south with no shading at all. Our base load is pretty low and we weren't running any big appliances apart from the dishwasher yesterday. The Zappi will automatically shut off charging when the grid import goes over a (adjustable) threshold. We probably imported 300wH to put 5kWh into the car yesterday; today ended up being pretty similar. The minimum charge rate is 6a or 1.4kW so it will import some when required to keep that rate going until the import threshold is surpassed and the charger pauses.

As it happens today we then ran the oven for 90 minutes to cook jacket potatoes, using around 2.5kWh. If we'd have swapped our lunch and dinner meals then we could have used the solar to power the oven instead rather than it going into the car and thus avoiding the import. Try explaining that to Mrs Petriix though...

shinytop

Petriix said:

Grumpy_chap said:

Petriix said:

Meanwhile the sun added 5kWh to my MG5 battery yesterday and has already added another 1kWh this morning. That's around 24 miles with zero emissions (not even from the grid) and zero cost.

That's amazing given the time of the year!
Is that true free energy for the car, over and above meeting your domestic electricity needs first?

Our panels seem particularly good in the cold and they face pretty close to due south with no shading at all. Our base load is pretty low and we weren't running any big appliances apart from the dishwasher yesterday. The Zappi will automatically shut off charging when the grid import goes over a (adjustable) threshold. We probably imported 300wH to put 5kWh into the car yesterday; today ended up being pretty similar. The minimum charge rate is 6a or 1.4kW so it will import some when required to keep that rate going until the import threshold is surpassed and the charger pauses.

As it happens today we then ran the oven for 90 minutes to cook jacket potatoes, using around 2.5kWh. If we'd have swapped our lunch and dinner meals then we could have used the solar to power the oven instead rather than it going into the car and thus avoiding the import. Try explaining that to Mrs Petriix though...

Isn't that 12 miles in your EV?  I'd have microwaved them for a bit first. 

castle96

Microwave first, then Halogen cooker

Petriix

castle96 said:

Microwave first, then Halogen cooker

We don't have a microwave. Baked potatoes is one of the few things I would actually use one for. I much prefer the crispy, caramelised flavour you get with a conventional oven.

frayedknot

Its a general rule that 'early adopters' get milked. Be a laggard and youll get a bargain.