GRA
Posts: 12181
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Electric cars got even cleaner in a year, new grid data shows

Tue Mar 10, 2020 6:09 pm

GCC:
CARB publishes 2020 CI values for electricity as transportation fuel: average 82.92 gCO2e/MJ, up from 2019
https://www.greencarcongress.com/2020/0 ... arbci.html

The California Air Resources Board (CARB) Executive Officer has certified the 2020 annual update to the carbon intensities (CI) of the lookup table pathways for a) California Average Grid Electricity Used as a Transportation Fuel in California and b) Electricity Supplied under the Smart Charging or Smart Electrolysis Provision.

The updated pathway CI values are available for quarterly fuel reporting under the Low Carbon Fuel Standard (LCFS) in 2020, beginning with Q1.

The CI of California average grid electricity used as a transportation fuel in California for 2020 is 82.92 gCO2e/MJ. This represents a slight increase over the CI of 81.49 gCO2e/MJ used in 2019.

The CI for the smart charging or smart electrolysis provision varies by time of day (using an hourly window) and quarter. It ranges from a low of 27.30 gCO2e/MJ for the window from 12:01 pm to 2:00 pm in Q1 to a high of 143.40 gCO2e/MJ from 7:01 to 8:00 pm in Q3. . . .

The current certified average CI—based on the average crude oil supplied to California refineries and average California refinery efficiencies—of CARBOB—the standard grade of gasoline supplied to the California market— is 100.82 gCO2e/MJ.

There's a chart, which only runs through 2018. Looking at that, the reason for the increase appears to be a decrease in large hydro and an increase in NG. All the renewables are also up. Direct link to report: https://ww3.arb.ca.gov/fuels/lcfs/fuelp ... ovdelivery
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

Oilpan4
Posts: 1622
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Electric cars got even cleaner in a year, new grid data shows

Tue Mar 10, 2020 6:30 pm

Who uses electricity by the mega joule?
Do they not want to say 300 grams per kwh?
trumpvirus
Is going to get you.

GRA
Posts: 12181
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Electric cars got even cleaner in a year, new grid data shows

Tue Mar 10, 2020 6:33 pm

Since energy is measured in joules and watts are a conversion on top of all the other conversions due to type of generating source and its efficiency, I imagine it's easier to calculate gCo2e in (mega)joules.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

lorenfb
Posts: 2464
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Electric cars got even cleaner in a year, new grid data shows

Tue Mar 10, 2020 7:52 pm

GRA wrote:
Tue Mar 10, 2020 6:33 pm
Since energy is measured in joules and watts are a conversion on top of all the other conversions due to type of generating source and its efficiency, I imagine it's easier to calculate gCo2e in (mega)joules.
Energy = Integral of Power (watts) over time, e.g. kWh, joule - watt-second.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

GRA
Posts: 12181
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Electric cars got even cleaner in a year, new grid data shows

Wed Mar 11, 2020 5:47 pm

Uh huh, the SI unit of energy is the joule.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

Return to “Environmental Issues”