Skip to main content

Table 4 Energy use and carbon dioxide emission (CO2) of the office alternatives

From: Innovative offices for smarter cities, including energy use and energy-related carbon dioxide emissions

In kWh/year Present Mega Local Home
Offices
 Lighting 1468 1299 812 1468
 Air conditioning electric 991 932 485 1109
 Air conditioning gas 8900 6261 2236 10,364
 Equipment 622 523 361 684
 Subtotal office use 11,981 9014 3894 13625
 Subtotal office energy reduction 0% 25% 67% −14%
Transport
 Car 4442 3397 0 0
 Train 97 760 0 0
 Subtotal transport energy reduction 4539 4157 0 0
 Total MWh per person 16.5 13.2 3.9 13.6
 Energy reduction 0% 20% 76% 18%
CO2 kg per year per person
 Office electricity 511 383 163 582
 Office gas 134 95 34 157
 Car 128 98 0 0
 Train 4 33 0 0
 Total kg/year 777 608 197 738
 Percent of typical CO2 per capitaa 7.4% 5.8% 1.9% 7.0%
 Emission reduction 0% 22% 75% 5%
  1. Emission factors for CO2 in kg per kWh are for offices electricity 0.043 [69], for car 0.029 [70], for train 0.035 [71, 72] for gas 0.015 [73]; gas is 35 MJ/m3, 3.6 MJ/kWh
  2. aAssumed 10 500 kg CO2 per person per year