AUTO EV JAPAN DEVELOPS LOW-POWER AIR-CON FOR ELECTRIC CARS
PWACE | Quote | Chart | News | PowerRating -- Electric vehicle importer and
developer Auto EV Japan Co. has developed a small, low-power
air conditioner for electric cars that can operate without
significantly reducing travel distance.
Standard car air-conditioning systems typically use a gas
coolant to provide the heat and cold used to modify the air
that is blown into the passenger compartment. This requires a
power-hungry compressor and a vaporization chamber, adding both
size and energy requirements to the system.
In the case of the Girasole, the two-seater that Auto EV
began selling in September of 2007, a regular air conditioner
can steal away half of the 120km the electric car would
otherwise be able to travel on a full charge.
But the new air conditioner consumes half as much power so
even with the cooler running the Girasole can travel around
100km.
The new system is based on a Peltier device, a plate-shaped
semiconductor device that cools down on one side and heats up
on the other when subjected to an electric current. The device
is fitted into the car's air-blowing unit and hooked up to a
dedicated radiator and to piping that circulates water.
Electricity to the Peltier device is supplied from a lithium
ion battery fitted under the car.
Auto EV Japan plans to market the new air conditioner for
the Girasole starting this summer, priced at about 200,000 yen
(US$2,020).
The company will also develop a version that can be built
into regular gasoline-engine cars for use by taxis and
commercial vehicles. Since the system is powered by a lithium
ion battery it will be able to provide heat or air conditioning
even when the engine is off.
(Nikkei)
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