PowerDown PowerUp

PV Cells London 18,639 kWh.  average  annual  household  usage  8,174,100 people 3,269,640  homes    60,942,819,960 kwh  for  London  homes  per  year    4m2  per  kwp    850kwh  per  year    1m2  of  pv  =  210kwh  per  year  so  we  need  290,203,904.6m2

 of  pv  to  power  London    1  Canada  Square    235m  high  50m  long  facades  2  useable  facades  of  23,500m2    4,935,000kwh  +  2500m2  roof  space  525,000kwh    

5,460,000kwh  per  year  

11,160  of  these  needed  for  powering  London  solely  from  PV  cells    33  boroughs  372  Towers  needed  per  borough        

Wind It’s Britain’s number one – our most abundant and economic source of renewable energy and the technology to harness it is well developed.  Strata Tower The three nine-metre wind turbines at the top of the building are rated at 19  kW  each and are anticipated to produce 50,000kWh of electricity per year total 148 m high in reality they are turned off from 7pm – 11am because of the noise  60,942,819,960 kwh  for  London  homes  per  year    London  would  need  1,218,856  of  these  turbines  to  produce  enough  energy  for  the  whole  of  London    London  has  51  buildings  over  100m    each  of  these  would  need  24,377      Standard  wind  turbine  2mw    generates  5,580,000kwh per year

London would need 10,920  of  these  turbines  to  generate  all  of  London’s  energy          

Anaerobic Digestion Facility Cassington near Oxford Provides electricity for over 4,000 homes 45,000 tonnes-a-year waste capacity. spanning over 2 hectares with 3 digesters measuring 4,200m³ each, two storage tanks measuring 4,200m³, a 26,000m³ lagoon and two Jenbacher 320 engines at 4m high 3 digester take up 1050m2 each two storage tanks take up 1050m2 each and the lagoon would be 6500m2  And the two engines take up 150m2 so a total of 11,900m2  with 45,000 tonnes of waste to serve 4000 homes Because of the efficiencies of scale (and ease of calculation) I think this could be squeezed into 10,000m2 or 1 hectare

8,174,100 population of london London  has  an  average  household  of  2.5  people  so  there  must  be  about  3,269,640  houses  in  London    So  there  would  need  to  be  about  820  of  these  plants  to  provide  all  the  electricity  needs  for  London  These  plants  would  require  about  36,900,000  tonnes  of  waste  each  year  

London  sends  over  900,000  tonnes  if  organic  waste  to  landfill  each  year   Canary Wharf contains around 14,000,000 square feet

(1,300,000 m2) (130 plants – 520,000 homes electricity)  

 One  Canada  Square   111,000m2  floor  area    11  Plants  495,000 tonnes  of  Waste  Power  for  44,000 homes 75 of  these  needed  throughout  London  33  borough  -­‐  less  than  three  per  borough      Tower  Hamlets      254,000  population  101,600  houses, 1,893,722,400kwh    Needs  250,000m2  floor  area  of  plant  

25  Canada  Square  101,000 m2  

8  Canada  square  101,000m2  

20  Bank  street  47,500m2