چکیده
|
In the present work, energy harvesting from sloshing of Newtonian and non-Newtonian fluids has been
studied experimentally. The most important features of this study are: proposing a new method for
energy harvesting, comparing the performance of Newtonian and non-Newtonian fluids in energy
harvesting, determining the impact and contribution of each input parameter in the results and driving a
relationship for the obtained data in terms of input parameters. Power law index of fluids, frequency of
excitations, electrical resistance, strength of permanent magnets and non-dimensional fluid height in the
container have been used as input parameters. Effect of input parameters on peak to peak voltage, root
mean square voltage and electrical power have been investigated. Also, the effect of input parameters
was statistically investigated using analysis of variance (ANOVA) and finally an empirical-mathematical
model was developed for harvested voltages and electrical power. Results showed that strength of the
permanent magnets and the frequency of excitations had higher influence on the output parameters
with respect to the other input parameters. For example, the contribution percentage of B and f on the
harvested electrical power were 28.63% and 22.67%, respectively. Obtained results also indicated that the
harvested voltages and electrical power were higher for Newtonian fluid than dilatant and pseudoplastic
liquids. Harvested electrical power was increased by increasing the strength of permanent magnet and
decreasing electrical resistance. Another important finding is reaching the output parameters to their
maximum level at near the resonance frequency of the system. Highest measured parameters were
650 mV, 94.96 mV and 41.52 m W for Vpp, Vrms and P, respectively.
|