Electric power was estimated in case of the large-scale flat thermoelectric
panels exposed to two thermal fluids. The output powers of the proposed 15
systems were analytically deduced from heat transfer theory, and written by non-
dimensional functions to reflect the characteristics of system design. The
maximum output was the largest in the ideal isothermal systems. In the other
realistic systems, it was the largest for the system of the counter flow with
one panel. The multiplication of thermoelectric panels can shorten
significantly the device area, although the output from the multi-panels
decreases a few pct. The worse heat conductivity, ramda, of thermoelectric
materials and the better heat transfer at the surfaces are desired for these
fluid systems, in addition to the better figure of merit, Z.