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To achieve high efficiency and power output, thermoelectric module geometry needs to be carefully designed. Thermoelectric module height is a major design parameter that can significantly influence output power. This paper present a mathematical model of thermoelectric generator derived from fundamental transportation equation. Module height optimization is conducted to achieve maximum power. The...
A method of measuring the thermal conductance and the heat capacity of a nanowire is presented. The nanowire is suspended in vacuum to ensure the thermal isolation, and the resistance is measured with respect to the square of the current to obtain the thermal conductance in the length direction. The heat capacity is evaluated by the frequency response of the 3f component of the voltage across the...
In recent years, thermoelectric energy conversion has experienced a legendary renaissance. This promising technology has a high potential to contribute to the need of energy sustainability and autonomous power sources for a broad variety of electronic devices. The chapter Micro thermoelectric generators provides a comprehensive overview of the current landscape of micro thermoelectric energy harvesters...
Thermoelectric generators (TEGs) can improve the net power consumption of electronic packages by generating power from the chip waste heat. In this study, a 3D computational model of electronic package with silicon nanowire (Si-NW) based embedded TEGs has been developed and the effect of crucial geometric parameters, contact resistances and thermal properties such as pitch length and length of Si-NWs,...
This paper describes the modeling of a thermoelectric generator and the tuning of various maximum power point tracking (MPPT). The model includes an equivalence between the thermal and the electric variables. A test bench has been built in order to test the complete system and compare the simulation and experimental results. Three MPPT strategies have been selected and tested, including Perturb &...
This work aims at improving the energy harvester performance by using low-dimensional thermoelectric materials. A micro-thermoelectric generator with quantum well thermocouples is developed by state-of-the-art CMOS (Complementary metal-oxide semiconductor) process. A relaxation-time model is applied to analyze the characteristic length of silicon germanium quantum well, and a thermal model is also...
A thermoelectric equipment (TEE) is constituted of heat sink and thermoelectric generator (TEG), and other components. The dynamic model for both heat sinks and TEGs are built up. Then the TEE's equivalent circuit model is gotten. Its source response characteristic and load response characteristic are analyzed. The results indicate that the output response for heat source step signal shows a large...
This paper develops a numerical model of thermoelectric generator (TEG), and analyses the influencing factors on output power based on the model. The model takes into account much more influencing factors than previous model, such as contact effects and actual structure of TEG. It can be seen by curves analysis and theoretical derivation, that the output power of TEG can be improved by increasing...
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