Sunday, 9 December 2012

Oil - November update

This picture from Stuart Sandiford's blog shows "all liquids" (crude, condensate, natural gas liquids, biofuels) approximately flat for 2012.


At around 90 Mb/d, this is a lot higher than ASPO's last prediction (made in 2008) of  77.5 Mb/d (and falling).

Saturday, 8 December 2012

CO2 October 2012

Here are the latest CO2 numbers from the NOAA:
  • October 2012: 391 ppm
  • October 2011: 389 ppm
An increase of about 0.5% per year.

Friday, 7 December 2012

UN Food Numbers - December 2012

Cereal production estimates for 2012 have been revised downwards this month by 2 million tonnes (Mt) to 2280 Mt. This is down almost 3% from last year's record but is essentially equal to the four year average.



The food price index is down 1.5% this month and is 7% lower than last year's average.



Note that at 211, the index is at more than twice the 2002-2004 average (= 100).

The next UN report is due out on February 7th 2013.

Monday, 19 November 2012

Electricity: CO2/kWh by source

This is just to track CO2/kWh. Table from Decc.

Carbon dioxide emissions
Energy source
g/kWh
Coal
910
Natural Gas
390
Nuclear
0
Renewables
0
Other
540
Overall average
430

Source: Decc (Table 3)

Sunday, 18 November 2012

News from Nova Scotia

Factor of 10 energy saving by the OilDrum's efficiency expert, HereinHalifax:

I'd like to provide an example of the energy saving potential within the commercial sector, if I may: a local bicycle shop recently moved into their new location and hired an interior designer to give the store a more up-scale look. Here's what she selected for their showroom lighting:

  1. Wall displays: 32 x 50-watt GU10 halogens = 1,600-watts
  2. Recessed cans: 11 x 50-watt MR16 halogens = 550-watts
  3. Display pendants: 3 x 100-watt A19 incandescents = 300-watts
  4. Decorative pendants: 33 x 100-watt A19 incandescents = 3,300-watts
Total connected load: 5,750 watts.

And here's what we did for this client:

  1. Wall displays: 32 x Philips 5.5-watt AmbientLED GU10s = 176-watts
  2. Recessed cans: 11 x Philips 10-watt EnduraLED MR16s = 110-watts
  3. Display pendants: 3 x Philips 12-watt EnduraLED Short Neck PAR30 = 36-watts
  4. Decorative pendants: 33 x Philips 9.7-watt L-Prize A19s = 320-watts
Total connected load: 642 watts -- a near 90 per cent reduction.

Permalink


Impressive. It also shows how BAU (business as usual) thinking is so far off track...

Saturday, 17 November 2012

German Renewables

From Oil Drum commenter Ulenspiegel ( Permalink)

German data:

2012 around 5% of the electricity will be produced by PV, while all renewables provide around 24% of the electricity, the most important contribution (~8%) comes from wind.
Power: With 30 GW installed PV we can expect next year days with more than 20 GW PV between 1 and 4 p.m.; 2011 the highest power from renewables were > 32 GW a day in September (16 GW PV, 16 GW wind + unknown amount biomass), this meant > 45% of the power came from renewables. I hope we see more of these days in 2013 to test net stability.
Hmm, I wonder what the numbers are for the UK?

Update:
I googled 'UK electricity production 2011'  and found DECC's electricity statistics page:
From here, I downloaded the PDF: DUKES Chapter 5: Electricity:
OK, here we can see that renewables were 9.4% of UK electricity (v 24% in Germany). UK wind & wave was 15.8 TWh out of a total 374 TWh, ie about 4% (v 8% in Germany). Then I found a footnote saying solar is included in wind & wave, so UK wind + wave + solar =~ 4% versus wind + solar in Germany =~ 13%.

Tuesday, 1 May 2012

More food miles



This is a guest post by my friend Alec Dauncey about New Zealand lamb in UK supermarkets. His calculations show that the transportation costs (in CO2) are negligible compared to production costs and driving to the supermarket.

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Summary CO2eq per kg of meat in shop:
  • Lamb production - 35.0kg 
  • Shipping from New Zealand - 0.2kg 
  • Articulated lorry Liverpool to Morissons - 0.02kg 
  • Trip to the shop in the car to buy it - 2.0kg 

Conclusion: the "foodmiles" are vanishingly irrelevant? A tiny tweak in production emissions on the farm absolutely dwarfs the emissions from shipping it half way around the world?  

Transport Sources:
 http://archive.defra.gov.uk/environment/business/reporting/pdf/110707-guidelines-ghg-conversion-factors.pdf

  • A van to a farmers market = 0.5 g CO2eq/kg of product/km (Table 7b p27) 
  • An articulated lorry at = 1.0kg CO2eq/km = 0.1 g/kg/km (Table 7e allowing for average loads etc) 
  • Large general cargo ship or container ship say 10,000 tonnes and 0.01kg CO2eq/tonne/km = 0.01g/kg/km 
  • Going to the supermarket to buy a kg of lamb in the car = 200g CO2eq per km. (Tables 6b and c) 

So the emissions for bringing a kilo of NZ lamb 20,000 km are 200 grams of CO2eq?

Further emissions of 20 grams will bring a kg of NZ lamb 200 km from the port to Morrisons?

Driving 5km round trip from my home to Morrisons to buy it emits 2000 grams?

Production Sources:
 http://www.theecologist.org/News/news_analysis/986252/lamb_beef_and_cheese_have_largest_food_footprint.html

Gives about 35kg of CO2eq per kg of meat product.

UK figures:

 http://randd.defra.gov.uk/Document.aspx?Document=IS0205_3958_EXE.doc

Table II Gives about 17kg of CO2eq per kg of carcass. This is similar to the 35kg for product because only about half the sheep carcass makes it to product:

http://www.ca.uky.edu/agc/pubs/asc/asc179/asc179.pdf

Wales vs NZ production:
http://www.hccmpw.org.uk/medialibrary/publications/carbonfootprintsheepreportapril1508FINAL%20REPORT-1.pdf

Warning this was funded by Hybu Cig Cymru so probably biaised, just as the NZ report it discusses was probably the other way?

Welsh figures - "Emissions per kg of live weight leaving the farm range from 9.8 to 37.0 kg CO2 equivalents kg-1, with a median value of 15.3 kg CO2 equivalents kg-1."