MEPS − Televisions | April 2005 |
principal TV is assumed to have the assumed usage of 440 Wh above, but second and subsequent TVs in a household use only 50% of this energy or 220 Wh per day. The total energy use would then be 322 GWh. These figures are shown in the following table:
Table 5: Energy usage against TV penetration
Number of TVs in | Estimated | Total | Energy usage | |
number of | number | GWh | ||
household | ||||
households | of TVs | (440Wh/day)* | ||
| ||||
0 | 30,600 | 0 | 0 | |
1 | 590,200 | 590,200 | 89 | |
2 | 541,900 | 1,083,800 | 123 | |
3 | 242,200 | 726,600 | 73 | |
4 | 63,000 | 252,000 | 24 | |
5+ | 26,600 | 133,000 | 12 | |
Total all households | 1,494,500 | 2,785,600 | 322 |
* Second and subsequent TVs are assumed to use 50% of this figure.
Total energy consumption of all televisions in Australia is estimated at 1,055 GWh pa in 2003 (Harrington & Foster 199910), and is estimated to increase to 1,361 GWh by 2010. The proportion of total household energy use attributed to televisions is also estimated to be 5% − considerably greater than a clothes washer (1%), clothes dryer (1%) or dishwasher (1%) and only marginally less than refrigerators/freezers (10%). All of these household appliances already carry an energy rating label and freezers are subject to MEPS.
As an indicative figure only, on a population pro rata basis, New Zealand’s TV energy consumption would be approximately 20% of the Australian estimate or 211 GWh − somewhat less than the 322 GWh above, even making allowances for New Zealand’s population of TVs possibly being somewhat older than the equivalent Australian population.
A best guess estimate is probably that the present energy consumption by all TVs is around 320 GWh. According to some commentators, normal appliance technology improvements under “business as usual” will improve the efficiency of conventional TV designs by around 2% per year (see Table 9). However changes in the market mix may act in the opposite direction. Slimline TVs do not necessarily use less energy - for example LCDs use less energy, but plasma (and projection) TVs use significantly more - 300W or greater. Whilst Table 4B indicates that slimline TVs have only 5% of CRT market share, LCD sales increased fivefold and plasma sales threefold in the last year. Ultimately whether the energy usage continues to fall, will depend whether the market moves more towards LCD or plasma screens in the next 5 to10 years.
New Zealand’s total electrical energy consumption is presently of the order of 40,000 GWh, and increasing by 2% per annum (800 GWh). The present total TV energy consumption of 320 GWh is thus of the order of 40% of the annual growth in energy usage. A 10% saving by using some form of MEPS is thus not insignificant in managing the electricity demand profile growth.
10Harrington, L & Damnics, M. 2003, Energy Labelling and Standards Programs Throughout the World, National Appliance and Equipment Energy Efficiency Committee, Canberra.
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A study produced for the Energy Efficiency and Conservation Authority by
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