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). IMPORTANT INFO FOR ENERGY AUDIT AND ENERGY AUDIT WRITE UP 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 (http://www.greenhouse.gov.au/challenge/tools/workbook/factorsmethod_section2.html): 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 http://www.usctcgateway.net/tool/ This website calculates greenhouse gas equivalencies, with comparisons made to household electrical use for one year or acres of forest preserved from deforestation etc http://www.americanforests.org/resources/ccc/index.php 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 http://www.natenergy.org.uk/convert.htm#calc Will calculate for you the amount of CO2 emitted for certain distance travelled in a car, bus or plane I also found this on http://www.create.org.uk/downloads/se_transport.pdf , 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 WORKSHEET Energy Audit data sheet (print this out, and fill in during your audit) Green Steps Student Names ___________________________________________________ Green Champ Name and department:____________________________________________ Date:______________________________________________________________________ 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 off Flourescent tube 36 W per NA fitting tube (not Each light fittings per fitting) generally has two tubes. Treat light fitting as one appliance. % of total # of flouro fittings Incandescent 60 W Na light bulbs % of total # of incandescent light bulbs Compact 15 W Na fluorescent light bulb % of total # of fluorescent light bulbs. LCD (flat screen) 34 W 1.3 W Monitors % of total # of LCD monitors CRT Monitors 63 W 5W (large cube like monitors) % of total # of CRT monitors CPU 300 W 22.5 W % of total # of CPUs 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 http://www.energystar.gov.au/products/computers.html 19/09/05 • Compact fluorescent bulb wattages http://www.eere.energy.gov/consumerinfo/factsheets/ef2.html • CRT wattage based on reading from wattage meter study carried out on 17” CRT monitor at ANUgreen. • LCD screen wattage based on reading from wattage meter carried out at ANUgreen for a Dell 19” LCD screen.
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