JimBob
Well-Known Member
- First Name
- James
- Joined
- Jan 26, 2021
- Threads
- 72
- Messages
- 914
- Reaction score
- 1,057
- Location
- Toronto Canada
- Vehicles
- Taycan 4S
- Thread starter
- #1
What was supposed to be a range test of the effect of temperature on distance, turned into a deeper dive into the effect of wind speed on range. The test was run at a mean temperature of 1.2C/34.7F as compared to the first test at -8.7C/16.3F.
The next test will be done around 10C/50F.
First if anyone has criticisms or suggestion or comments, please do so.
First the results:
Metric
Imperial
As before the test was run on the same course with observations made at 2 minute intervals. Chart 3 shows the output as displayed on the dash.
Charts 1 and 2 show the combined results from tests 1 and 2 in metric and imperial.
It's difficult to run a test in March as the month is pretty windy. The forecast for early Sunday morning was for cross winds or quartering winds of around 7 kph / 4.3 mph building to 25 kph / 15.5 mph later in the morning. Winds were not an issue on the outbound leg. And some flags along the route showed them to be cross winds and fairly light.
On the return leg, the winds along with snow squalls off Lake Huron arrived early, so probably 1/2 to 2/3 of the leg was affected by winds.
Trip distance as measure was 354 km / 220 miles and consumption was 246.9 Wh/km and 393.3 Wh/mile.
On reviewing the results, I felt I needed to take a deeper dive into the effect the winds had on distance travelled.
The plan was to run the outbound leg until battery SOC reached 55% and then return. This would leave a 10% reserve to run off near to home.
This is what happened on the first test when wind was not a factor. The distance traveled on the outbound and inbound legs was nearly the same at 151 km vs 153 km.
On the second test, with the wind up the legs were quite different. The distance travelled on the outbound leg without the effect of wind was 172 km vs 152 km on the inbound leg. The wind appears to have cost me 20 km in distance.
Without the wind, based on the results of the first test, I estimate the distance travelled would have been 382.2 km vs the actual 354 km. Or in Imperial, I estimated the distance travelled would have been 237.5 miles vs the actual 220 miles.
Conclusions
- As the temperature warms the battery really starts to come to life.
- Unexpected changes in winds can have a significant effect on distances travelled.
Chart 1
Chart 2
Chart 3
The next test will be done around 10C/50F.
First if anyone has criticisms or suggestion or comments, please do so.
First the results:
Metric
Mode | Mean Air Temp Celsius | Target Speed kph | Distance Traveled in km | Consumption Wh/km |
* Range | 1.2 | 115 | 354A / 383.2E | 246.9A / 228.1E |
Range | -8.7 | 115 | 338 | 258.6 |
Imperial
Mode | Mean Air Temp Fahrenheit | Target Speed mph | Distance Traveled in miles | Consumption Wh/mile |
* Range | 34.7 | 71.5 | 220A / 237.5E | 397.3A / 368E |
Range | 16.3 | 71.5 | 210.1 | 416 |
As before the test was run on the same course with observations made at 2 minute intervals. Chart 3 shows the output as displayed on the dash.
Charts 1 and 2 show the combined results from tests 1 and 2 in metric and imperial.
It's difficult to run a test in March as the month is pretty windy. The forecast for early Sunday morning was for cross winds or quartering winds of around 7 kph / 4.3 mph building to 25 kph / 15.5 mph later in the morning. Winds were not an issue on the outbound leg. And some flags along the route showed them to be cross winds and fairly light.
On the return leg, the winds along with snow squalls off Lake Huron arrived early, so probably 1/2 to 2/3 of the leg was affected by winds.
Trip distance as measure was 354 km / 220 miles and consumption was 246.9 Wh/km and 393.3 Wh/mile.
On reviewing the results, I felt I needed to take a deeper dive into the effect the winds had on distance travelled.
The plan was to run the outbound leg until battery SOC reached 55% and then return. This would leave a 10% reserve to run off near to home.
This is what happened on the first test when wind was not a factor. The distance traveled on the outbound and inbound legs was nearly the same at 151 km vs 153 km.
On the second test, with the wind up the legs were quite different. The distance travelled on the outbound leg without the effect of wind was 172 km vs 152 km on the inbound leg. The wind appears to have cost me 20 km in distance.
Without the wind, based on the results of the first test, I estimate the distance travelled would have been 382.2 km vs the actual 354 km. Or in Imperial, I estimated the distance travelled would have been 237.5 miles vs the actual 220 miles.
Conclusions
- As the temperature warms the battery really starts to come to life.
- Unexpected changes in winds can have a significant effect on distances travelled.
Chart 1
Chart 2
Chart 3