Re: Measuring Power dissipation emperically


"Arlet Ottens" <usenet+5@xxxxxxxxxx> wrote in message
news:480301ba$0$14345$e4fe514c@xxxxxxxxxxxxxxxxx
Jon Slaughter wrote:
How does one go about measuring the power dissipation of a device(low
voltage) emperically? Stick it in water? Use a large heat sink? (talking
about the long term average and not instantanous obviously)

You could stick in a box, and watch the rise of the air temperature in the
box.

Then repeat the experiment, but replace your device with a resistor.
Adjust the current to get the same rise in temperature.


Yes, this is what I'm talking about with water. Air has less thermal inertia
so the measurements will be more unstable. (unless you can control it
precisely)


Also, with water its easier to use the specific heat capacity to get another
measurement. (easier to measure water's mass and it has extremely high
thermal inertia)


.

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