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Contents contributed and discussions participated by dave woolcock

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Ch 21 Page 153: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_153.shtml
shared by dave woolcock on 10 May 09 - Cached
  • 143The average internal temperature in British houses in 1970 was 13 °C! Source: Dept. of Trade and Industry (2002a, para 3.11)
    • dave woolcock
      dave woolcock on 13 May 09
       
      I still don't believe it - do you?
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Ch 21 Page 151: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_151.shtml
shared by dave woolcock on 13 May 09 - Cached
  • In Japan, thanks to strong legislation favouring effi- ciency improvements, heat pumps are now available with a coefficient of performance of 4.9.
    • dave woolcock
      dave woolcock on 13 May 09
       
      Am I being cynical in guessing that these figures quoted for COP are peak or best figures? how does the COP vary with external air temperatures that we are likely to see in the UK?... I imagine it is easy and efficient to extract heat from warm air, but what matters is the range -5 to +15C... more COP data please. Otherwise its like car MPG figures.
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Ch 21 Page 143: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_143.shtml
shared by dave woolcock on 10 May 09 - Cached
    • dave woolcock
      dave woolcock on 13 May 09
       
      I do like this method of displaying information. Edward Tufte would be proud !

In the papers - 4 views

started by dave woolcock on 02 May 09 no follow-up yet
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Ch 18 Page 107: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_107.shtml
shared by dave woolcock on 01 Apr 09 - Cached
  • Estimates of theoretical or practical renewable resources in the UK
    • dave woolcock
      dave woolcock on 01 Apr 09
       
      What makes the PIU's biomass estimate so out-of-line with the others?
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Ch 9 Page 58: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_58.shtml
shared by dave woolcock on 31 Mar 09 - Cached
  • Moreover, its lifetime is said to be 15 000 hours (or “12 years,” at 3 hours per day)
    • dave woolcock
      dave woolcock on 31 Mar 09
       
      In my experience this is utter tosh. I have been using CFLs for 20 years. I write the install date on the bulb with a felt pen. Many don't last as long as an incandescent bulb. And it isn't always the cheap ones that go early. I keep hoping tat they will improve, but I haven't seen it yet. So the economic case is highly suspect in my view.
    • dave woolcock
      dave woolcock on 31 Mar 09
       
      I guess they are more complex so there is more to go wrong. And it does go wrong.
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Ch 9 Page 57: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_57.shtml
shared by dave woolcock on 31 Mar 09 - Cached
  • Street-lights
    • dave woolcock
      dave woolcock on 31 Mar 09
       
      One of my pet hates - getting up for a pee in the middle of the night and looking out of my bathroom window at megawatts of street lighting, utterly wasted as everyone is asleep. (I can see for 20 miles... light pollution has gone mad... )
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Ch 7 Page 52: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_52.shtml
shared by dave woolcock on 12 Feb 09 - Cached
  • patio heaters
    • dave woolcock
      dave woolcock on 31 Mar 09
       
      now all too common outside pubs since the no-smoking rules... what a waste!
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Ch 18 Page 112: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_112.shtml
shared by dave woolcock on 31 Mar 09 - Cached
    • dave woolcock
      dave woolcock on 31 Mar 09
       
      The government could make a start by chucking some money at a huge renewables project (like the Severn barrage) to show that it means it. Twiddling with market forces aint going to work is it? Its an easy option that gives the impression that "something" is being done, when actually they don't really want to do anything for fear of it losing them (more) votes
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Ch 18 Page 108: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_108.shtml
shared by dave woolcock on 30 Mar 09 - Cached
  • completely forested the country
    • dave woolcock
      dave woolcock on 01 Apr 09
       
      sounds like a good investment for any otherwise non-productive land
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Ch 18 Page 105: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_105.shtml power vs GDP
shared by William Sigmund on 31 Mar 09 - Cached
  • Power consumption per capita, versus GDP per capita,
    • dave woolcock
      dave woolcock on 31 Mar 09
       
      Countries with nice warm climates should need less energy
  • Figure 30.1 (p231)
    • dave woolcock
      dave woolcock on 01 Apr 09
       
      gives me Object not found error
  • The only notable ex- ception to the rule “big GDP implies big power consumption” is Hong Kong.
    • dave woolcock
      dave woolcock on 01 Apr 09
       
      How much motorway driving occurs in HK? Compact urbanised countries need less road-miles
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