It's not JUST about ZT
Why is the first question every engineer ever ask is, “So, what’s your ZT?” I understand WHY this is the case, in fact, it was one of the first questions I asked when I first discovered PowerFelt. But the simple matter is that PowerFelt is made of many different materials with different harvesting capabilities that impact the ZT in many different ways, Couple this with the fact that we combine non-heterogenous materials in a non-traditional format and all of a sudden a traditional ZT measurement doesn’t apply.
But wait, there’s more. With PowerFelt, any change in motion non-linearly shifts that the TEG characteristics of the material. So where in the traditional ZT calculation do you account for the frequency and amplitude of motion. I guess ITD has discovered some new Physics. Pretty cool!