Table of Contents
Acknowledgements ... 18 List of Figures ... 19 List of Tables ... 23 Nomenclature ... 24 1. Introduction ... 162. The aim and the scope of the thesis ... 21
3. Review of energy harvesting methods from heat sources and vibration damping methods via shunted piezoelectrics ... 23
3.1. Thermoelectricity ... 24
3.2. Thermoelectric Energy Harvesting ... 26
3.2.1. Analytical Models...28
3.2.2. Circuit models ...31
3.2.3. Finite Element Method ...35
3.2.4. Adopted approach ...37
3.3. Piezoelectricity ... 37
3.4. Piezoelectric Shunt Damping Technique ... 38
3.4.1. Adopted approach ...41
4. Energy harvesting possibilities in a bearing node ... 43
4.1. Models of applied subsystems ... 47
4.1.1. Model of Thermoelectric Generator (TEG) ...47
4.1.2. Model of Heat Sink...56
4.1.3. Model of Convective Heat Transfer at Rotating Shaft ...57
4.1.4. Model of Bearing Power Loss ...57
4.2. Sensitivity analysis ... 58
4.3. Circuit analysis... 60
4.3.1. Continuous operation mode ...61
4.3.2. Burst operation mode ...65
5. Concept of the vibration damper powered via the thermal harvesting source ... 72
5.1. Proof of concept ... 75
6. Numerical assessment of expected system performance ... 79
6.1. Numerical Approach in Assessing the Shunted Piezoelectric Damping Capabilities 80 6.1.1. Proposed Calculation Scheme ...84
6.1.2. Auxiliary test case ... 86
7. Experimental verification ... 92
7.1. Verification of impedance method implementation ... 92
7.2. Verification of impedance method implementation for coupled FSI analysis ... 95
7.3. Passenger test car – the real world example of application the proposed numerical procedure ... 99
7.3.1. Problem Description ...99
8. Analysis of results and applicability study ... 106
9. Conclusion and further research possibility ... 107
References ... 110
Appendix A: Bibliometrics ... 119
