This article describes a new concept of the thermoelectric power generation
from the immense low-temperature heat sources. The thermoelectric junction to
be used for the present purpose is a new p-n junction consisted of
Fe12pctAl12pctSi(p) - Fe12pctAl(n) (pct. in weight) which exhibits a
thermoelectric power as high as 70microV/K and relatively high electrical
conductivity even at low temperatures, and which can be manufactured on
an effective mass production basis. Important issue of this study is the
heat-exchange type multi-stage thermoelectric generation system.
Theoretical approach was dealt with in order to organize the system
so as to make the electrical recovery efficiency close to 80 pct.