Wednesday, October 20, 2010

How Far Will the Nissan Leaf Travel in Various Situations?

Nissan has released the following predictions of range as compared to driving conditions:

depending on the conditions, when your battery is new your range may vary anywhere from 138 - 62 miles. range is most affected by:

Climate control – the more extreme the temperature is outside, the more energy used to heat or cool the cabin.

Speed – higher speeds require much more energy to overcome air resistance.

Driving style – smooth acceleration and deceleration will extend range while aggressive acceleration and deceleration will decrease range.

Cargo and topography – heavy cargo and driving up steep long inclines will reduce range.

there are an infinite number of range scenarios*, based on many variables. here are just a few, starting with the EPA LA4 test cycle:

EPA LA4 test cycle: 100 miles

The Nissan LEAF has been tested under the EPA Urban Dynamometer Driving Schedule, a laboratory test commonly called the LA4 test cycle, which represents city driving conditions. Top speed is 56.7 mph and average speed is 19.59 mph. Ambient temperature can vary from 68 - 86 degrees. Climate control is off. The Nissan LEAF easily achieved 100 miles.

Ideal driving conditions: 138 miles

Speed: Constant 38 mph

Temperature: 68 degrees

Climate control: Off

Driving on a flat road at a constant 38 mph means less air resistance, and therefore less energy use. And at 68 degrees, there's no need for climate control, extending the range even further. The result: a range boost up to 138 miles.

Suburban driving on a nice day: 105 miles

Speed: Average 24 mph

Temperature: 72 degrees

Climate control: Off

The average speed in this scenario is 24 mph; common when commuting and running errands. The ambient temperature is 72 degrees and the climate control is off. Not using the air conditioner and driving at slower speeds mean less energy use and a little extra range.

Highway driving in the summer: 70 miles

Speed: Average 55 mph

Temperature: 95 degrees

Climate control: On

Averaging 55 mph on the highway, in 95 degree weather, with the air conditioning on high may produce range figures like this. Higher speeds require more energy to overcome air resistance. Running the air conditioner means energy that could be used to increase range instead goes to cooling the car.

Cross-town commute on a hot day: 68 miles

Speed: Average 49 mph

Temperature: 110 degrees

Climate control: On

Driving from a rural area into the city at an average 49 mph with the a/c on high may produce this range. Under these conditions, climate control combined with higher-speed driving produces increased energy consumption, hence the effect on range.

Winter, urban stop-and-go, traffic jam: 62 miles

Speed: Average 15 mph

Temperature: 14 degrees

Climate control: On

Though the average speed is only 15 mph with stop-and-go traffic, the 14-degree temperature means the heater is doing a lot of work so you spend considerable time and energy heating your car rather than moving forward. Despite these conditions, it would still take more than 4 hours to run out of charge!

DISCLAIMER *All above scenarios based on new battery life. Estimated range based upon specific variables studied through computer simulations.

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