I will do this on a headless Rpi Zero W.
First I am going to install a headless Raspian Stretech lite. Directions for this are here:
Next I will setup the software for the Purethermal2 to work with the RPi. I will first install libusb and then the groupgets version of libuvc (https://github.com/groupgets/libuvc) and then I will try the uvc-radiometry.py script from (https://github.com/groupgets/purethermal1-uvc-capture).
Once I get the image capture to work, we will save power by periodically disconnecting from and turning off the Purethermal board which is a usb device. There are some forums that discuss generally how this is done:
Another approach would be to work on doing a better job at stopping camera streaming when we are done.
General power saving tips are discussed here.