A thermoelectric module comprising a central thermoelectric assembly of cylindrical tubular shape inside which a first cold fluid flows and outside which a hot fluid flows.This module is characterized in that it also comprises at least one peripheral thermoelectric assembly having: an outer face in contact with a second cold fluid; an inner face positioned on a peripheral boundary surrounding the central thermoelectric assembly, said boundary defining a channel between said central and peripheral thermoelectric assemblies where the hot fluid flows.