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We did a simulation of the "Dynamic Performance" of the Volt in an earlier thread. We can now use this model to simlulate the Single Charge Cruise Range. (We increased the Gear Ratio to 7.595.)
We want to determine how many miles the battery will allow for a single charge (50% discharge) at a given vehicle speed. We use the following assumptions. The vehicle stops and starts starts every 15 minutes. The battery supplies the energy required to accelerate to the cruising speed every 15 minutes from a stop and also for losses for air drag and tire resistance at the cruising speed. The power conditioner and gears each has a 90% power efficiency.
We will find the cruise range for three conditions: (1) idle power consumption is 200W, (2) a high efficiency heat pump/air conditioner consumes ~ 700W plus idle power, and (3) a resistance heater consumes 2000 watt plus idle power. Obviously, power needed for A/C and heating is dependent on environmental factors such as ambient temp, wind, humidity, snow, etc. We just want some baselines. The resultant curves are attached. Summary: the 40 mile range for cruising speeds given the three above conditions are 56, 53, and 41 mph, respectively. Looking at the attached curves makes interpretation of the above results easier. The bottom line is that you can cruise with A/C at 53 mph.
We want to determine how many miles the battery will allow for a single charge (50% discharge) at a given vehicle speed. We use the following assumptions. The vehicle stops and starts starts every 15 minutes. The battery supplies the energy required to accelerate to the cruising speed every 15 minutes from a stop and also for losses for air drag and tire resistance at the cruising speed. The power conditioner and gears each has a 90% power efficiency.
We will find the cruise range for three conditions: (1) idle power consumption is 200W, (2) a high efficiency heat pump/air conditioner consumes ~ 700W plus idle power, and (3) a resistance heater consumes 2000 watt plus idle power. Obviously, power needed for A/C and heating is dependent on environmental factors such as ambient temp, wind, humidity, snow, etc. We just want some baselines. The resultant curves are attached. Summary: the 40 mile range for cruising speeds given the three above conditions are 56, 53, and 41 mph, respectively. Looking at the attached curves makes interpretation of the above results easier. The bottom line is that you can cruise with A/C at 53 mph.
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