kW for heating or AC?

[Jan Treur]

Sorry that I cannot write in your own language, but I have a question I want to ask you.

To get a better approximation of the range for low and high temperatures it is useful to take into account the losses in kW power for heating or AC. I made a computational model with some parameters for this and I want to ask whether from your experiences the values for certain temperatures are too high, too low or OK. I assume preconditioning took place and this indicates only the average power in kW to maintain the interior temperature during the driving. Note that it sometimes fluctuates between lower and higher, so then an average should be considered.

This is the graph of the kW against outside temperature for the current settings (with interior set point 20 °C). I modeled the case that a heat pump is used (until -10 °C), as you can see in the curve of the blue line. For resistance-based heating you have to follow the straight red dotted line from -10 °C to the point 0 at 20 °C.

[Emil Nyström]

I have made this calculation chart with interpolated functions for the heat power and driving consumption. I used the consumption values from the test made by Tesla-Björn. And my own values for heating power, i have tested all the way down to -24c. Its a good estimation but not scientifically exact in any way.

[Jan Treur]

That would be very useful.
Are you sure the heating numbers are on this sheet? I only see different numbers.

[Jan Treur]

Based on some first reported experiences from the German Ioniq forum

http://www.goingelectric.de/forum/hyundai-ioniq/kw-fur-heizung-und-ac-t22986-10.html#p506335

I adjusted some of the parameters a bit. For example, now I estimate the heat loss rate of a driving Ioniq at 80 Watt per °C temperature difference between inside and outside temperature. The graph below shows this update, assuming an interior temperature set at 22°C; the reported experiences are depicted as dots.

Still more experienced numbers are welcome!

[Jan Treur]

I have updated the graph above by adding a new data point and also made the graph below for the energy cost for the initial heating to increase the temperature when you did not preheat the car (HP = Heat Pump, RH = Resistance Heater). More details can be found at http://www.ioniqforum.com/forum/234-hyundai-ioniq-electric-ev/6393-heating-ac-what-power-used.html.