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It is now universally recognized that it is necessary to reduce CΟ
2
emissions via specific measures aimed at lowering traditional energy consumption.Today’s reality is that there are millions of low powered electric motors utilised in both commercial refrigeration display cabinets and bottle coolers.Manufacturers of such appliances currently have two alternatives concerning the choice of motor to install: a traditional shaded pole motor, or an electronic motor.From a technical stance the characteristics required by the manufacturer are the same: both motors require a yield of 8 Watts, in order to power a 230 mm diameter fan blade.
But what differentiates the traditional motor from the electronicmotor is the energy absorption as is illustrated below:
2
emissions via specific measures aimed at lowering traditional energy consumption.Today’s reality is that there are millions of low powered electric motors utilised in both commercial refrigeration display cabinets and bottle coolers.Manufacturers of such appliances currently have two alternatives concerning the choice of motor to install: a traditional shaded pole motor, or an electronic motor.From a technical stance the characteristics required by the manufacturer are the same: both motors require a yield of 8 Watts, in order to power a 230 mm diameter fan blade. But what differentiates the traditional motor from the electronicmotor is the energy absorption as is illustrated below:
Traditional shaded pole motor
this motor absorbs 36 watts
in order to yield 8 watts, an approximate 20% efficiency ratio.
Electronic motor
this motor absorbs 12 watts in order to yield 8 watts, an approximate 65% efficiency
The importance of the use of a
energy saving motor can be seen
if we look at the impact on a single
Supermarket,
where there are
approximately 200 meters of display
cabinets installed, that are equipped
with approximately 200 motors.
If we consider the average cost
per KWh as being 0,11
€
and emissions as being equivalent
to 0,43 Kg of CO
2
per KWh
consumed, the benefit of substituting
traditional shaded pole motors with
electronic motors could be quantified
as follows:
• Annual saving of approx.
68.500 KWh;
• Annual saving of approx.
7.500
€
;
• Reduction of CO
2
emissions
equivalent to approx.
30 Tons
.
In payback terms it should be
emphasised that the additional cost
of the high efficiency electronic
motor is more than covered
by the energy costs saved and
we estimate that the net incremental
revenue streams are positive in a
matter of
months
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