4. Introduction
Thermoelectric Generators ( also called
thermo-generators)
are devices which convert heat (temperature
differences) directly into electrical energy,
using a phenomenon called the "See-beck effect"
(or "thermoelectric effect").
Their typical efficiencies are around 5-10%.
8. Older See-beck-based devices used bimetallic
junctions and were bulky while more recent
devices use bismuth telluride (Bi2Te3)
semiconductor p-n junctions and can have
thicknesses in the millimeter range.
These are solid state devices and unlike
dynamos have no moving parts, with the
occasional exception of a fan.
Radioisotope thermoelectric generators can
provide electric power for spacecraft.
Automotive thermoelectric generators are
proposed to recover usable energy from
automobile waste heat.
10. thermoelectric generators are used for :-
Small applications where heat engines such as
Stirling engines would not be possible.
The use of waste heat in combustion
engines promises to be a high volume
application field. Not only the exhaust but
also cooling agents are targeted.
11. To increase the efficiency a of the combined
solar/thermoelectric system and convert the
solar radiation into useful electricity.
Thermoelectric modules can be used for energy
recovery of otherwise wasted heat.
Several companies have begun projects in
installing large quantities of these thermoelectric
devices.
