Application of the compatibility factor to the design of segmented and cascaded thermoelectric generators

Use of thermal compatibility factor to the design of segmented and cascaded thermoelectric generators was discussed. It is suggested that since the thermoelectric material properties may change dramatically from one segment to another, compatibility becomes the most important factor for segmented generators. It was found that in a cascaded system there are independent electrical circuits for each stage, allowing for independent values of current density. It is suggested that a refractory metal with high p-type thermopower is required for development of cascaded generators to avoid the compatibility problem.