A thermoelectric generator includes a first thermoelectric segment including at least one thermoelectric module. The first thermoelectric segment has a working fluid flowing therethrough with a fluid pressure. The thermoelectric generator further includes a second thermoelectric segment including at least one thermoelectric module. The second thermoelectric segment is configurable to allow the working fluid to flow therethrough. The thermoelectric generator further includes at least a first variable flow element movable upon application of the fluid pressure to the first variable flow element. The first variable flow element modifies a flow resistance of the second thermoelectric segment to flow of the working fluid therethrough.
STATEMENT REGARDING FEDERALLY SPONSORED R&D
 The U.S. Government may claim to have certain rights in this invention or parts of this invention under the terms of Contract No. DE-FC26-04NT42279 awarded by the U.S. Department of Energy.