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