Diagrams of Dimensionless Equations Determining Two Basic Working Regimes of Peltier Heat Pump

This chapter presents diagrams of dimensionless equations determining two basic working regimes of Peltier heat pump. The chapter also outlines that in practical selection of material approximately equal specific conductivities of both legs must be chosen to obtain uniform current distribution in both parts. It is also highlighted that the present calculation technique in frequently repeated projects of thermoelectric devices is comparatively laborious, and does not give rapid information on concrete changes of states under simultaneous changes of physical parameters of semiconductor materials. The problem has been solved by the use of dimensionless equations valid for Peltier heat pump system, that were numerically computed for a wide range of temperatures (hot junction temperature) and (cold junction temperature) and for the “effective figure of merit” of material. The results reveal that graphical expression of dimensionless equations solving a Peltier refrigerating element permits a rapid calculation of thermoelectric devices generally with physical parameters of any description. It does away with a laborious numerical calculation for the changing temperature conditions, or for various material constants of semi-conductors.