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*Lithium Ion batteries - predicted to go down to under $200/kWh -[http://www.autoblog.com/2013/11/08/li-ion-battery-prices-headed--down-180-kwh/] | *Lithium Ion batteries - predicted to go down to under $200/kWh -[http://www.autoblog.com/2013/11/08/li-ion-battery-prices-headed--down-180-kwh/] | ||
*Nickel-Iron battery energy density - 50Wh/kg - [http://batteryuniversity.com/learn/article/alternate_battery_systems] | *Nickel-Iron battery energy density - 50Wh/kg - [http://batteryuniversity.com/learn/article/alternate_battery_systems] | ||
:*Lithium ion battery is 2-5x as energy dense. | |||
Revision as of 06:06, 26 December 2014
- World Military Spending - $1.7T
- US GDP - $17T, and Government Budget- $7T
- World GDP - or GWP - $85T
- World energy use - 144 PWhr
- USA Military Spending - $640B - $2k per capita spending
- USA Trillion Military Budget - [1]
- $40B organics market - http://www.ers.usda.gov/topics/natural-resources-environment/organic-agriculture/organic-market-overview.aspx. That makes it
- Annual sustainable forest yield of 12.5B cubic meters or 105 exajoules - [2], p. 615
- Annual energy use by USA - 94 exajoules
- US energy consumption by sector - 40% electricity, 30% transportation - [3]
![[3]](http://en.wikipedia.org/wiki/Energy_in_the_United_States#mediaviewer/File:US_Energy_Consumption_by_Sector_2007.PNG){kind=link}
- Total USA energy use - 25 PWhr - [4] - (petawatt hours (See Metric Prefixes))
- Equivalent to 90 exajoules, consistent with Renewable Energy "Blue Bible" above.
- 250GW of PV is installable on existing rooftops - Cosservative estimate (50% of residential rooftops) - [5]
- Per year, let's take average insolation as 6 hours per day * 365 days - or 550 TWhr per year. That is 2% of USA's energy use, or 5% of USA's electric use. This is JUST RESIDENTIAL ROOFTOPS. Needs to add commercial rooftops, parking lots, roadway medians.
- USA road density - 67 km/ 100 sq km of area - [6]
- USA area - 10 million sq km
- USA roads - 6.7 million km. Assume an average road is 2 lane with shoulder - each lane has 12 foot (3.7m) standard in the USA - [7] - or an area of about 100,000 sq km. This could power 1/4 of the world's energy needs (oil, nukes, solar)
- Area required to power all of the world with PV is 400,000 sq km - [8]
- Total forest area of the world - 4 billion hectares - [9] - 30% of land area of world.
- Total farmland area worldwide -
- Total land area - 150M sq km - google
- Total agriculture land - 33% of world land according to FAO - [10]
- Energy per capita US vs Switzerland - As an indicator, the average energy use per person is 12,000 watts in the USA but only 3,000 in the Switzerland - [11]
- Percentage of USA energy by source. Coal electricity is 40% - [12]
- Half of USA rooftops could replace all coal electricity in the USA - [13]
- World electricity production 2009 - 20PWh - [14]
- Area of all cities compared to world land area - 0.5% - [15] - or 750,000 sq km.
Other
- Average driving distance - 13.5k miles/yr - USA - [16]
- Average commute, USA - 14 miles - [17]
- Tesla Model S battery - $12k for 10 years of service - [18]
- This source says 5 years of service - [19]
- Given $1200/year battery costs of Tesla Model S, cost of fuel or electricity is $1700 - no savings - between the electric and regular fuel option approximately at the 15,000 mile per year mark - according to cost calculator at [20]
- Lithium Ion batteries - predicted to go down to under $200/kWh -[21]
- Nickel-Iron battery energy density - 50Wh/kg - [22]
- Lithium ion battery is 2-5x as energy dense.