Contents contributed and discussions participated by dave woolcock - od energy group read

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 - Snapshot

143The average internal temperature in British houses in 1970 was 13 °C! Source:

Dept. of Trade and Industry (2002a, para 3.11)
- dave woolcock on 13 May 09
  
  I still don't believe it - do you?
  
  <div class="cArrow"> </div><div class="cContentInner">I still don't believe it - do you?</div>
  
  ...
  
  Cancel
...

Cancel

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 - Snapshot

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 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.
  
  <div class="cArrow"> </div><div class="cContentInner">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.</div>
  
  ...
  
  Cancel
...

Cancel

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 - Snapshot

- dave woolcock on 13 May 09
  
  I do like this method of displaying information. Edward Tufte would be proud !
  
  <div class="cArrow"> </div><div class="cContentInner">I do like this method of displaying information. Edward Tufte would be proud !</div>
  
  ...
  
  Cancel
...

Cancel

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 - Snapshot

Estimates of theoretical or practical renewable resources in the UK
- dave woolcock on 01 Apr 09
  
  What makes the PIU's biomass estimate so out-of-line with the others?
  
  <div class="cArrow"> </div><div class="cContentInner">What makes the PIU's biomass estimate so out-of-line with the others?</div>
  
  ...
  
  Cancel
...

Cancel

Ch 14 Page 87: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_87.shtml

shared by dave woolcock on 11 Mar 09 - Snapshot

Ch 11 Page 69: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_69.shtml

shared by dave woolcock on 23 Feb 09 - Snapshot

Ch 10 Page 63: Sustainable Energy - without the hot air - 0 views

www.inference.phy.cam.ac.uk/...page_63.shtml

shared by dave woolcock on 23 Feb 09 - Snapshot

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 - Snapshot

Moreover, its lifetime is said to be

15 000 hours (or “12 years,” at 3 hours per day)
- 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.
  
  <div class="cArrow"> </div><div class="cContentInner">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.</div>
  
  ...
  
  Cancel
- dave woolcock on 31 Mar 09
  
  I guess they are more complex so there is more to go wrong. And it does go wrong.
  
  <div class="cArrow"> </div><div class="cContentInner">I guess they are more complex so there is more to go wrong. And it does go wrong.</div>
  
  ...
  
  Cancel
...

Cancel

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 - Snapshot

Street-lights
- 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... )
  
  <div class="cArrow"> </div><div class="cContentInner">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... )</div>
  
  ...
  
  Cancel
...

Cancel

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 - Snapshot

patio heaters
- dave woolcock on 31 Mar 09
  
  now all too common outside pubs since the no-smoking rules... what a waste!
  
  <div class="cArrow"> </div><div class="cContentInner">now all too common outside pubs since the no-smoking rules... what a waste!</div>
  
  ...
  
  Cancel
...

Cancel

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 - Snapshot

- 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
  
  <div class="cArrow"> </div><div class="cContentInner">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</div>
  
  ...
  
  Cancel
...

Cancel

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 - Snapshot

completely forested the country
- dave woolcock on 01 Apr 09
  
  sounds like a good investment for any otherwise non-productive land
  
  <div class="cArrow"> </div><div class="cContentInner">sounds like a good investment for any otherwise non-productive land</div>
  
  ...
  
  Cancel
...

Cancel

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 dave woolcock on 31 Mar 09 - Snapshot

Power consumption per capita, versus GDP per capita,
- dave woolcock on 31 Mar 09
  
  Countries with nice warm climates should need less energy
  
  <div class="cArrow"> </div><div class="cContentInner">Countries with nice warm climates should need less energy</div>
  
  ...
  
  Cancel
...

Cancel
Figure 30.1 (p231)
- dave woolcock on 01 Apr 09
  
  gives me Object not found error
  
  <div class="cArrow"> </div><div class="cContentInner">gives me Object not found error</div>
  
  ...
  
  Cancel
...

Cancel
The only notable ex-

ception to the rule “big GDP implies big power consumption” is Hong

Kong.
- dave woolcock on 01 Apr 09
  
  How much motorway driving occurs in HK? Compact urbanised countries need less road-miles
  
  <div class="cArrow"> </div><div class="cContentInner">How much motorway driving occurs in HK? Compact urbanised countries need less road-miles</div>
  
  ...
  
  Cancel
...

Cancel