Energy Audit Instructions for ANU Project (Document sourced by GeorgeWhitelock


									Energy Audit Instructions for ANU Project (Document sourced originally from ANU, 2005)

The aim of the energy audit is to identify what equipment is being left on out of hours, and to identify what savings
could be made, both financially and in green house gas emission terms. You have a whole bunch of figures at the
end of this document to help you do this. Ideally you will generate a business as usual scenario of energy
consumption, and contrast this with a scenario where appliances are switched off or left in power save mode out of
hours of use.

To really make the energy consumption figures make sense to the reader, you’ll need to give an analogy (eg The
Facilities and Services Division uses as much power each year unnecessarily as a car travelling between Sydney
and Perth 60 times – I made this figure up, but you get the jist).

ACT Greenhouse gas conversion
According to the AGO, the GHG emission factor of 1.44 is too high for the ACT. They use approx 1.00 on a
National Basis.

kWh = 1.012 kg CO2 equivalent in NSW & ACT

Other State emission factors are
  VIC 1.444 (brown coal)
  QLD 1.079
  SA 1.186
  WA 1.114
  TAS 0.002 (Hydro)
  NT 0.654

Cost of electricity to ANU
Average (24 hrs a day, 7 days a week) electricity cost at the ANU is 8c/kWh (info sourced on 18 May 2004).

Assumed length of ANU ‘working year’:
Days in year =                                                                 365
minus weekends (105)                                                           105
minus public holidays (12 average)                                             12
minus ANU Christmas closure (7)                                                7
minus annual leave (20)                                                        20
total remaining days in working year                                           221

Assumptions used for calculating usage hours:
total hours in a year (365 x 24)                     8760

work day hours a year (8am –6pm x 221)               2210
work nights hours per year                           3094
non work hours per year (hols etc) 3456
total non-work hours per year                        6550

percentage of non work hours = 25.23%

Useful Calculators:
Kilometers traveled conversion figures: 1 km traveled = 0.23kg CO2 equivalent
This website calculates greenhouse gas equivalencies, with comparisons made to household electrical use
for one year or acres of forest preserved from deforestation etc
Here you can enter your gas estimates for a number of activities and it will calculate the annual number of new
trees needed to absorb that amount of CO2
Will calculate for you the amount of CO2 emitted for certain distance travelled in a car, bus or plane

I also found this on , which highlights the impact car
size has on emissions.

Mode of Transport       Typical CO2 emissions (g / km)
walking              3
cycling                  3
small car (1 litre)       150
medium car (2 litre)       190
large car (4 litre)      350
mini-bus             300
urban bus              1200
Energy Audit data sheet (print this out, and fill in during your audit)
Green Steps Student Names ___________________________________________________
Green Champ Name and department:____________________________________________
Energy Audit Location: ________________________________________________________
(aim for an area with approximately 20 - 30 work stations – do more if you like). Eg: first floor of Hancock Building, all
office space and bathrooms.

Appliance             Power      wattage        Power status: # in            wattage       Power           Total number
                      status                    sleep/standby/sensor                        status: #       of appliances
                      #On                       mode                                        Switched
Flourescent tube                 36 W per                                     NA
fitting                          tube (not
Each light fittings              per fitting)
generally has two
tubes. Treat light
fitting as one
% of total # of
flouro fittings

Incandescent                     60 W                                         Na
light bulbs
% of total # of
light bulbs

Compact                          15 W                                         Na
fluorescent light
% of total # of
fluorescent light

LCD (flat screen)                34 W                                         1.3 W
% of total # of
LCD monitors

CRT Monitors                     63 W                                         5W
(large cube like
% of total # of
CRT monitors

CPU                                300 W                                    22.5 W
% of total # of
Remaining rows are for other equipment such as photo copiers, scanners etc. You will need to find wattages for
these yourself (look for it on the equipment if there or note model name and search for wattage on internet.)
Wattage References:
   • CPU wattage is assumed at 300 as wattage varies between 200 and 450, depending on year
       CPU was made.

    •   CPU power save wattage varies between 15 and 30 watts depending on year CPU was made.
        Assume 22.5 W 19/09/05

     • Compact fluorescent bulb wattages

    •   CRT wattage based on reading from wattage meter study carried out on 17” CRT monitor at

    •   LCD screen wattage based on reading from wattage meter carried out at ANUgreen for a Dell
        19” LCD screen.

To top