MEPS
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Televisions April 2005
Page 16
A study produced for the Energy Efficiency and Conservation Authority by
Wise Analysis Ltd
Summary
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TV energy consumption
Overall television energy consumption is around 320 GWh, and could reduce over
the next 5-7 years by 20% if a MEPS regime is introduced. Although there is
considerable variation between manufacturers, energy consumption of various TV
types is likely to continue to fall as technology improves.
(e) Set top boxes
Figures for US set top box power usage were given in Rainer et al 2004.
12
Table 7: Average Set Top Box Power Levels
Type
Standby (W)
In-use (W)
Analogue cable
10
12
Digital cable
22
23
Satellite 16
17
Internet Protocol TV
14
15
Digital TV adaptor
8
17
They say that “Reducing the energy use of set-top boxes is complicated by their
multiple complex operating and communication modes. Although improvements in
power supply design and efficiency will be effective in reducing STB energy use, the
major energy savings will be obtained through the use of protocols and software to
better control the device (energy management).”
5
Technology Scope for Energy Efficiency
A 1998 report by Huenges and Siderius
13
stated that TV in-use energy consumption can be
reduced through two options:
•
Options regarding components:
o
Use less
o
Use more efficient
o
Use specifically designed components
•
Options regarding design (hardware and software)
o
Lower voltages
o
Fewer voltages
o
Power management
At that time the data showed a trend to decreasing power consumption only for smaller TVs
(below 49cm). For medium and larger sizes there was still a large variation. Because of their
short life times and high ownership growth rates, STBs perhaps also provide a great
opportunity for significant short term energy savings.
12
“What's On the TV: Trends in U.S. Set-Top Box Energy Use, Design, and Regulation” Rainer L, Thorne Amann J., Hershberg C., Meier A.,
Nordman B, IEA Conference paper URL
−
http://www.iea.org/dbtw-wpd/textbase/papers/2004/am_stb.pdf
13
Huenges Wajer B.P.F., Siderius P.J.S.,
Analysis of Energy Consumption and Efficiency Potential for TVs in on-mode, EC report November
1998
http://www.vhknet.com/download/TV_on-mode_final_report.pdf
