|Title||An Introduction to System Level Steady-State and Transient Modeling and Optimization of HighPower Density Thermoelectric Generator Devices Made of Segmented Thermoelectric Elements|
|Publication Type||Conference Paper|
|Year of Publication||2010|
|Conference Name||The 29<sup>th</sup> International Conference on Thermoelectrics, ICT2010|
|Conference Start Date||20100530-2010060|
|Conference Location||Shanghai, China|
|Keywords||thermoelectric, power generation, modeling, waste heat recovery, steady state, transient|
High power density, segmented, thermoelectric (TE) elements have been intimately integrated into heat exchangers,eliminating many of the loss mechanisms of conventional TE assemblies, including the ceramic electrical isolationlayer. Numerical models comprised of simultaneously solved, non-linear, energy balance equations have beencreated to simulate these novel architectures. These models begin at the element level and progress to the deviceand finally to the system level. Both steady state and transient models have been created in a MATLAB/Simulinkenvironment. The models predict data from experiments in various configurations and applications over a broadrange of temperature, flow, and current conditions for power produced, efficiency, and a variety of other importantoutputs.The ability to accurately and precisely model such devices allows devices to be extensively studied withoutadditional experimentation. Using the validated models, the devices and systems can be optimized using advancedmulti-parameter optimization techniques for different operating conditions. Optimization objectives such asmaximum power output, power density, and efficiency can be pursued with numerous different constraints beingconsidered such as pressure drop and temperature limitations. Devices optimized for particular steady stateconditions can then be dynamically simulated in a transient operating model. This transient model incorporatessystem and device thermal time constants that affect performance. The transient model can be operated for a varietyof operating conditions including automotive and truck drive cycles.