P3+N2

P3N2

Materials and geometry:  

P Leg: Cu₂Se

Reference: Tak, Jang Yeul , et al. "Ultralow Lattice Thermal Conductivity and Significantly Enhanced Near-Room-Temperature Thermoelectric Figure of Merit in α-Cu2Se through Suppressed Cu Vacancy Formation by Overstoichiometric Cu Addition." Chemistry of Materials (2018):acs.chemmater.8b00254.

N Leg: High zT Bi₂Te₃

Reference: Wu, Yehao , et al. "Enhancing room temperature thermoelectric performance of n -type polycrystalline bismuth-telluride-based alloys via Ag doping and hot deformation." Materials Today Physics 2(2017):62-68.

The best COP under different DeltaT:

 

The cooling power density at best COP under different DeltaT :

 

The current density at best COP under different DeltaT :

 

how do COP and cooling power change with current density when deltaT=0.9 delta Tmax:

 

how do COP and cooling power change with current density when deltaT=0.6 delta Tmax:

 

how do COP and cooling power change with current density when deltaT= 0.3delta Tmax:

 

how do COP and cooling power change with current density when deltaT= 0.1delta Tmax:

 

The optimum leg cross-section ratio