  We examine the thermopower Q of a mesoscopic normal-metal (N) wire in contact
to superconducting (S) segments and show that even with electron-hole symmetry,
Q may become finite due to the presence of supercurrents. Moreover, we show how
the dominant part of Q can be directly related to the equilibrium supercurrents
in the structure. In general, a finite thermopower appears both between the N
reservoirs and the superconductors, and between the N reservoirs themselves.
The latter, however, strongly depends on the geometrical symmetry of the
structure.
