Question : Star Rating of an Air Conditioner is determined by its
(A) Power Consumption (B) Energy Efficiency Ratio
(C) Cooling Capacity (D) Power of Compressor
Answer: (B) Energy Efficiency Ratio
Energy Efficiency Ratio=
o
For
air conditioners, the measure of energy efficiency is the Energy Efficiency Ratio (EER) for cooling and the Coefficient of Performance (COP) for
heating. The EER and COP are defined as the capacity output divided by the
power input.
o
Cooling
capacity is the amount of heat energy removed by the Air conditioner from a
space for a given time. It is generally measured in British Thermal Unit (BTU)
per hour (BTU/Hr). In SI units it is measured by KJ / Sec= KW.
o
Both
cooling capacity and power consumption is measured in watt.
A refrigeration ton is approximately equivalent to 12,000 BTU/h or 3,517
W.
1
Btu= 1055 Joules
EER (W/W) of 3.40 gives a 5 - Star Rating
which means for every watt of power consumed 3.40 W (3.4 Joules/sec) of heat
energy is removed by the air conditioner.
·
Bureau of Energy Efficiency under Ministry
of Power, Govt. of India was formed in the year 2002, under the provision of
Energy Conservation Act, 2001. All electrical appliances should have star
rating that determines its Energy Efficiency.
·
The Energy Conservation Building Code
(ECBC) was launched in 2007, which promotes Energy Efficiency in Building
Sector.
Star Rating of Geyser is determined by its ‘Standing Loss’ (kWh/ 24 hr)
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