Land use area per person
(m2)
percentage
– domestic buildings 30 1.1
– domestic gardens 114 4.3
– other buildings 18 0.66
– railways 3.6 0.13
– paths 2.9 0.11
– greenspace 2335 87.5
– water 69 2.6
– other land uses 37 1.4
Total 2670 100
 1000 BTU per hour = 0.3 kW = 7 kWh/d 1 horse power (1 hp or 1 cv or 1 ps) = 0.75 kW = 18 kWh/d 1 kW = 24 kWh/d
 1 therm = 29.31 kWh 1000 Btu = 0.2931 kWh 1 MJ = 0.2778 kWh 1 GJ = 277.8 kWh 1 toe (ton of oil equivalent) = 11 630 kWh 1 kcal = 1.163 × 10-3 kWh
 1 kWh = 0.03412 3412 3.6 86 × 10-6 859.7 therms Btu MJ toe kcal

suffix “th” may be added to indicate that a quantity of energy is thermal
energy. The same suffixes can be added to amounts of energy. “My house
uses 2 kWh(e) of electricity per day.”

If we add a suffix “p” to a power, this indicates that it’s a “peak” power,
or capacity. For example, 10 m2 of panels might have a power of 1 kWp.

1 kWh/d = 1/24 kW.

1 toe/y = 1.33 kW.

Petrol comes out of a petrol pump at about half a litre per second. So
that’s 5 kWh per second, or 18 MW.

The power of a Formula One racing car is 560 kW.

UK electricity consumption is 17 kWh per day per person, or 42.5 GW
per UK.

“One ton” of air-conditioning = 3.5 kW.

Table I.6. Land areas, in England, devoted to different uses. Source: Generalized Land Use Database Statistics for England 2005. [3b7zdf]
Box I.7. How other energy and power units relate to the kilowatt-hour and the kilowatt-hour per day.